CN112610732A

CN112610732A - Self-operated adjustable bidirectional throttle valve

Info

Publication number: CN112610732A
Application number: CN202011451712.7A
Authority: CN
Inventors: 曾楠; 胡欣钧; 郭伟行
Original assignee: Guangzhou Haitong Industrial Technology Co ltd
Current assignee: Guangzhou Haitong Industrial Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-04-06
Anticipated expiration: 2040-12-09
Also published as: CN112610732B

Abstract

The invention discloses a self-operated adjustable two-way throttle valve, which comprises: the valve body is provided with a fluid inlet hole, a fluid outlet hole and at least two groups of flow passages communicated with the fluid inlet hole and the fluid outlet hole; the valve core is slidably arranged in the valve body and is provided with at least two flow passages; the elastic adjusting assembly is arranged on the valve body and is connected with one end of the valve core, and a cavity where the other end of the valve core is located is communicated with the fluid outlet; when the fluid pressure of the valve core is controlled to be minimum, the flow passage of one valve core can be communicated with one group of flow passages of the valve body to form a normally open self-operated throttling passage; when the fluid pressure of the valve core is controlled to be maximum, the flow passage of the other valve core can be communicated with the other group of flow passages of the valve body to form a normally closed self-operated throttling passage.

Description

Self-operated adjustable bidirectional throttle valve

Technical Field

The invention relates to the field of throttle valves, in particular to a self-operated adjustable bidirectional throttle valve.

Background

The lifting of the simple and efficient quick lifting device consisting of the traditional pneumatic balance crane, the air cylinder, the hydraulic cylinder and the directional control valve is mainly controlled by a handle button valve or a coaxial sliding sleeve handle valve, and because the two valves belong to the type of the directional valve, the flow and the speed can not be accurately controlled, and the lifting speed and the descending speed are difficult to control in the actual operation process. Especially in the case of light loads or empty hooks, the rising speed is too fast to control and causes danger; under heavy load, the workpiece or equipment is easy to be damaged by too fast descending speed. Traditional product speed control is realized with the choke valve, but the choke valve only is applicable to the product of single weight, needs the aperture of manual adjustment choke valve when product weight change is great, complex operation, inefficiency. There is also a valve (SSC valve) for preventing a cylinder from rapidly extending, which functions such that when the air pressure in the cylinder is low, the intake air passes only through a fixed orifice and the cylinder rod slowly extends to prevent a danger; when the pressure in the cylinder increases to exceed the set pressure, the switch valve is opened to normally and quickly intake air. A drawback of this valve is that the cylinder rod may still be extended rapidly causing a hazard when there is residual pressure in the cylinder and a hazardous situation may occur without a deceleration effect when heavy loads are dropped.

The patent document with the application number of CN201810418846.5, entitled speed stabilizing mechanism of control valve and pressure feed type speed stabilizing valve, uses two speed stabilizing mechanisms and two one-way valves, realizes the basic function of preventing rapid rising in idle load and rapid falling in heavy load, but has complex structure, poor economical efficiency and poor adjustability, and needs to add other control elements to adapt to workpieces with different sizes and weights in practical application.

Disclosure of Invention

Based on the above, the invention aims to provide the self-operated adjustable bidirectional throttle valve which is simple in structure, stable in operation, automatic in adjustment and high in reliability.

The invention discloses a self-operated adjustable two-way throttle valve, which comprises:

the valve body is provided with a fluid inlet hole, a fluid outlet hole and at least two groups of flow passages communicated with the fluid inlet hole and the fluid outlet hole;

the valve core is slidably arranged in the valve body and is provided with at least two flow passages;

the elastic adjusting assembly is arranged on the valve body and is connected with one end of the valve core, and a cavity where the other end of the valve core is located is communicated with the fluid outlet;

when the fluid pressure of the valve core is controlled to be minimum, the flow passage of one valve core can be communicated with one group of flow passages of the valve body to form a normally open self-operated throttling passage;

when the fluid pressure of the valve core is controlled to be maximum, the flow passage of the other valve core can be communicated with the other group of flow passages of the valve body to form a normally closed self-operated throttling passage.

According to the self-operated adjustable bidirectional throttle valve, the valve body is provided with at least two groups of flow channels, the valve core is provided with at least two flow channels, when the fluid pressure of the valve core is controlled to be minimum, the flow channel of one valve core can be communicated with one group of flow channels of the valve body to form a normally open self-operated throttling channel, the flow channel opening of the valve core in the normally open self-operated throttling channel (namely a flow inlet channel) is minimum, the condition that the flow inlet speed is too high is prevented, when the pressure is higher, the flow channel opening is enlarged, and the flow inlet speed is increased; when the fluid pressure of the valve core is controlled to be maximum, the flow passage opening of the valve core in the normally closed self-operated throttling passage (namely, the outflow passage) is minimum, the outflow speed is prevented from being too high, the flow passage opening is enlarged when the pressure is small, the outflow speed is increased, the fluid pressure of the outflow hole acts on the other end of the valve core and pushes the valve core to move towards the elastic adjusting assembly until the fluid pressure is balanced with the elastic force, the larger the moving distance of the fluid pressure of the outflow hole is, the larger the opening or closing amount of the normally open self-operated throttling passage or the normally closed self-operated throttling passage is, and therefore the self-operated adjustable bidirectional throttling combination valve which is simple and reliable in structure is provided, the purpose that stable operation can be achieved through automatic adjustment under different working conditions can be achieved, and the requirements of various complex working conditions of pneumatic equipment or hydraulic equipment in the operation process can be met.

In one embodiment, the axis of the valve core intersects with the axis of the flow passage of the valve body. By the arrangement, the flow channel of the valve core and the flow channel of the valve body can be communicated more directly, so that fluid flows more smoothly.

In one embodiment of the above technical solution, a regulating cavity and a pressure cavity are arranged in the valve body, the regulating cavity and the pressure cavity are oppositely arranged at two ends of the valve body, the pressure cavity is communicated with the fluid outlet, and two ends of the valve core respectively face the regulating cavity and the pressure cavity.

In an embodiment of the above technical solution, the elastic adjusting assembly includes an adjusting part and an elastic element, the adjusting part is adjustably disposed on the valve body, the elastic element is disposed in the adjusting cavity, one end of the elastic element is connected to the adjusting part, and the other end of the elastic element is connected to one end of the valve core. Adjusting the elastic adjustment assembly can set the starting pressure of the whole throttle valve, and the pressure of the elastic element can be changed by adjusting the adjusting piece to adjust the position of the valve core under different fluid pressures so as to control the opening or closing amount of the normally open self-throttling passage and the normally closed self-throttling passage.

In one embodiment, a gasket is connected to an end of the valve element facing the pressure chamber. The gasket is arranged to protect the end of the valve core.

In one embodiment, an end cap is disposed outside the pressure chamber, and the end cap seals the pressure chamber. The pressure cavity and the interior of the valve body can be sealed through the end cover, and the internal structure can be maintained through dismounting the end cover.

In one embodiment of the above technical solution, the valve core is provided with a plurality of sealing rings along an axial direction thereof, and the sealing rings are abutted against an inner wall of the valve body. The sealing ring can form sealing between the valve core and the valve body, and fluid leakage is prevented.

In one embodiment, each set of flow passages of the valve body is provided with a throttle valve for adjusting the minimum flow.

In one embodiment of the above technical solution, each group of flow passages of the valve body is further provided with a check valve for controlling a flow direction of the fluid, and the check valve and the throttle valve form a one-way throttle valve. The one-way valve only allows circulation in one direction, and is beneficial to controlling fluid so as to meet the requirements of various complex working conditions of pneumatic equipment or hydraulic equipment in the operation process. The mounting directions of the one-way valve in each group of flow channels of the valve body are different, and the one-way valve is used for controlling the flow channel to be an inflow flow channel (particularly a flow channel for fluid to flow from an inflow fluid hole to an outflow fluid hole) or an outflow flow channel (particularly a flow channel for fluid to flow from the outflow fluid hole to the inflow fluid hole).

In an embodiment of the above technical solution, a sealing ring is disposed at a periphery of the one-way throttle valve, and the sealing ring abuts against an inner wall of the valve body. The sealing ring can realize the sealing of the one-way throttle valve and prevent fluid leakage.

Compared with the prior art, the self-operated adjustable bidirectional throttle valve has the advantages that at least two groups of flow channels are arranged on the valve body, at least two flow channels are arranged on the valve core, and when the fluid pressure of the valve core is controlled to be minimum, the flow channel of one valve core can be communicated with one group of flow channels of the valve body to form a normally-open self-operated throttle channel; when the fluid pressure of the valve core is controlled to be maximum, the other flow passage of the valve core can be communicated with the other flow passage of the valve body to form a normally closed self-operated throttling passage, the fluid pressure of the fluid outlet acts on the other end of the valve core and pushes the valve core to move towards the elastic adjusting assembly until the fluid pressure is balanced with the elastic force, the larger the moving distance of the fluid pressure of the fluid outlet is, the larger the opening or closing amount of the normally open self-operated throttling passage or the normally closed self-operated throttling passage is, and therefore the self-operated adjustable bidirectional throttling combination valve which is simple in structure and reliable is capable of achieving the purpose of achieving stable operation through automatic adjustment under different working conditions is provided, and the requirements of various complex working conditions of pneumatic equipment or hydraulic equipment in the operation process are met. The self-operated adjustable bidirectional throttle valve has the characteristics of simple structure, stable operation, automatic adjustment, high reliability and the like.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a self-operated adjustable two-way throttle valve of the present invention.

Fig. 2 is a sectional view taken along the line a-a in fig. 1.

Fig. 3 is a pneumatic (hydraulic) schematic diagram of the self-operated adjustable two-way throttle valve of the present embodiment.

Fig. 4 is a pneumatic (hydraulic) schematic diagram of a self-operated adjustable two-way throttle valve in other embodiments.

Fig. 5 is a pneumatic (hydraulic) schematic diagram of a self-operated adjustable two-way throttle valve in other embodiments.

Detailed Description

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like, referred to or may be referred to in this specification, are defined relative to their configuration, and are relative concepts. Therefore, it may be changed according to different positions and different use states. Therefore, these and other directional terms should not be construed as limiting terms.

The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Please refer to fig. 1-3. Fig. 1 is a schematic structural diagram of a self-operated adjustable two-way throttle valve of the present invention. Fig. 2 is a sectional view taken along the line a-a in fig. 1. Fig. 3 is a pneumatic (hydraulic) schematic diagram of the self-operated adjustable two-way throttle valve of the present embodiment.

The invention discloses a self-operated adjustable two-way throttle valve which comprises a valve body 1, a valve core 2 and an elastic adjusting component 3.

The valve body 1 is provided with a fluid inlet hole 101, a fluid outlet hole 102, and at least two groups of throttling ports 11 and flow passages 12 communicated with the fluid inlet hole 101 and the fluid outlet hole 102.

The valve core 2 is slidably installed in the valve body 1, and the valve core 2 is provided with at least two flow passages 21.

The elastic adjusting component 3 is installed on the valve body 1, the elastic adjusting component 3 is connected with one end of the valve core 2, and a cavity where the other end of the valve core 2 is located is communicated with the fluid outlet 102 through a flow passage 100.

When the fluid pressure of the valve core 2 is controlled to be minimum, the flow passage 21 of one of the valve cores 2 can be communicated with one of the throttling ports 11 and the flow passage 12 of the valve body 1 to form a normally open self-operated throttling passage a (namely, a flow inlet passage).

When the fluid pressure controlling the valve core 2 is maximum, the flow passage 21 of another valve core 2 can communicate with the other group of throttling ports 11 and the flow passage 12 of the valve body 1 to form a normally closed self-throttling passage b (i.e. an outflow passage).

By arranging at least two groups of throttling ports 11 and flow channels 12 on the valve body 1 and arranging at least two flow channels 21 on the valve core 2, when the fluid pressure of the valve core 2 is controlled to be minimum, the flow channel 21 of one valve core 2 can be communicated with one group of flow channels 12 of the valve body 1 to form a normally open self-operated throttling channel a, and the opening of the flow channel 21 of the valve core 2 in the normally open self-operated throttling channel a (namely a flow inlet channel) is minimum, so that the condition that the flow inlet speed is too high is prevented, and when the pressure is higher, the opening of the flow channel is enlarged and the flow inlet speed is increased; when the fluid pressure of the valve core 2 is controlled to be maximum, the opening of the flow passage 21 of the valve core 2 in the normally closed self-operated throttling passage b (namely, the outflow passage) is minimum, so that the excessive high outflow speed is prevented, the opening of the flow passage is enlarged when the pressure is small, the outflow speed is increased, the fluid pressure of the fluid hole 102 acts on the other end of the valve core 2 and pushes the valve core 2 to move towards the elastic adjusting component 3 until the fluid pressure is balanced with the elastic force, the larger the fluid pressure of the fluid hole 102 is, the larger the moving distance is, the larger the opening or closing amount of the normally open self-operated throttling channel a or the normally closed self-operated throttling channel b is, so that the self-operated adjustable bidirectional throttling combination valve with simple and reliable structure is provided, the automatic adjustment device can achieve the purpose of achieving stable operation by automatic adjustment under different working conditions so as to meet the requirements of various complex working conditions of pneumatic equipment or hydraulic equipment in the operation process.

Specifically, the inlet fluid port 101 and the outlet fluid port 102 of the valve body 12 may be coupled to a standard pipe joint by a screw connection so as to communicate with an external member.

The axis of the valve core 2 intersects with the axis of the flow passage 12 of the valve body 1. With such arrangement, the flow passage 12 of the valve element 2 can be communicated with the flow passage 12 of the valve body 1 more directly, so that the fluid flows more smoothly.

Preferably, a regulating cavity 103 and a pressure cavity 104 are arranged in the valve body 1, the regulating cavity 103 and the pressure cavity 104 are oppositely arranged at two ends of the valve body 1, the pressure cavity 104 is communicated with the fluid outlet 102, and two ends of the valve core 2 respectively face the regulating cavity 103 and the pressure cavity 104.

Further, the elastic adjusting assembly 3 includes an adjusting member 31 and an elastic element 32, the adjusting member 31 is adjustably disposed on the valve body 1, the elastic element 32 is disposed in the adjusting cavity 103, one end of the elastic element 32 is connected to the adjusting member 31, and the other end of the elastic element 32 is connected to one end of the valve core 2. Adjusting the elastic adjusting assembly 3 can set the starting pressure of the whole throttle valve, and the pressure of the elastic element 32 can be changed by adjusting the adjusting piece 31 to adjust the position of the valve core 2 under different fluid pressures, so as to control the opening or closing amount of the normally open self-throttling passage a and the normally closed self-throttling passage b.

The adjusting member 31 and the elastic member 32 of this embodiment are respectively an adjusting screw and a spring, which are simple in structure, convenient to adjust, and low in cost.

Preferably, a gasket 4 is connected to the end of the valve element 2 facing the pressure chamber 104. The gasket 4 is arranged to protect the end of the valve core 2. This embodiment further provides an elastic washer 5 on the outside of the washer 4, and preferably uses a screw 19 to mount the washer 4 and the elastic washer 5 on the end of the valve core 2, and the washer 4 has a larger outer shape than the valve core 2, so as to limit the extreme position of the end of the valve core 2 moving up and down in the pressure chamber 104.

Further, an end cover 6 is arranged outside the pressure chamber 104, and the end cover 6 seals the pressure chamber 104. The pressure chamber 104 and the interior of the valve body 1 can be sealed by the end cover 6, and the internal structure can be maintained by detaching the end cover 6.

Preferably, the valve core 2 is provided with a plurality of sealing rings 7 along the axial direction thereof, and the sealing rings 7 are abutted against the inner wall of the valve body 1. The sealing ring 7 can form a seal between the valve core 2 and the valve body 1 to prevent fluid leakage. The sealing ring 71 prevents the fluid in the valve body 1 from leaking into the adjustment chamber 103, and the adjustment chamber 103 is open to the atmosphere. The sealing ring 72 prevents pressure communication between the two orifices 11, and this sealing ring 7 can also be eliminated and instead sealed with a small gap.

The pressure chamber 104 is a relatively sealed space, in this embodiment, a sealing ring 8 and a sealing ring 9 are arranged at two ends of the pressure chamber 104 for sealing, the sealing ring 8 is arranged in the end cover 6, and a circlip 10 is preferably arranged outside the end cover 6, and the circlip 10 can prevent the end cover 6 from being removed under pressure.

As shown in fig. 3, fig. 3 is a pneumatic (hydraulic) schematic diagram of the self-operated adjustable two-way throttle valve of the present embodiment.

Further, each set of flow passages 12 of the valve body 1 is provided with a throttle valve 13 for adjusting a minimum flow rate. The function of the arrangement is to control whether the normally open self-operated throttling channel a or the normally closed self-operated throttling channel b has the functions of air inlet (liquid inlet) throttling or exhaust (liquid discharge) throttling.

Furthermore, each set of flow channels 12 of the valve body 1 is further provided with a one-way valve 110 for controlling the flow direction of the fluid, and the one-way valve 110 and the throttle valve 13 form a one-way throttle valve. The check valve 110 allows flow in only one direction, which is beneficial to controlling fluid to meet the requirements of various complex working conditions of pneumatic equipment or hydraulic equipment in the working process. The one-way valve 110 is installed in different directions in each set of flow channels 12 of the valve body 1, and is used to control whether the flow channel is an inlet flow channel (specifically, a flow channel in which a fluid flows from an inlet fluid hole to an outlet fluid hole) or an outlet flow channel (specifically, a flow channel in which a fluid flows from an outlet fluid hole to an inlet fluid hole).

Further, a sealing ring 18 is arranged on the periphery of the one-way throttle valve, and the sealing ring 18 is abutted against the inner wall of the valve body 1. The sealing ring 18 can realize the sealing of the one-way throttle valve and prevent the fluid from leaking.

The periphery of the throttle valve 13 of this embodiment is further provided with a Y-shaped sealing ring 15, the Y-shaped sealing ring 15 is located at the inner end of the throttle valve 13, and the Y-shaped sealing ring 15 can form better sealing for the throttle valve 13. Of course, the Y-shaped sealing ring 15 may be replaced by a U-shaped sealing ring or other similar sealing rings.

In addition, a circlip for hole 16 and a seal ring 17 are provided in the throttle valve 13.

Please further refer to fig. 4 and 5. Fig. 4 is a pneumatic (hydraulic) schematic diagram of a self-operated adjustable two-way throttle valve in other embodiments. Fig. 5 is a pneumatic (hydraulic) schematic diagram of a self-operated adjustable two-way throttle valve in other embodiments.

In addition, an adjustable throttle valve may be connected in parallel to each of the check valves 110; as shown in fig. 4, or a bidirectional adjustable throttle valve 20 is additionally arranged between the fluid inlet 101 and the fluid outlet 102 of the valve body 1, and the valve is in parallel connection with the normally open self-operated throttle passage a and the normally closed self-operated throttle passage b in the valve body 1; as shown in fig. 5, or two check valves 30 and a throttle valve 40 are additionally arranged between the fluid inlet 101 and the fluid outlet 102 of the valve body 1, where the two check valves 30 are opposite in direction, and each passage is in parallel connection with the normally open self-throttling passage a and the normally closed self-throttling passage b in terms of gas (liquid) path.

Preferably, a steel ball 14 is also preferably arranged in the flow channel 12 of the valve body 1 for plugging a process hole on the valve body 1 to prevent gas leakage in the flow channel 12, and a plurality of same steel balls 14 are arranged in different process holes.

The working principle of the self-operated adjustable bidirectional throttle valve is as follows:

the valve core 2 can slide up and down along the axial direction in the valve body 1, the adjusting piece 31 is adjusted to push the elastic element 32 to act on the upper end of the valve core 2, and the position of the adjusting piece 31 in the adjusting cavity 103 can be adjusted to adjust the magnitude of the force pre-pressed on the valve core 2.

The pressure of the fluid outlet 102 is transmitted via the flow channel 12 to the pressure chamber 104, which acts on the lower end of the valve slide 2.

The adjusting piece 31 is adjusted to a smaller pressure, and the normally open self-operated throttling channel a and the normally closed self-operated throttling channel b are adjusted to the minimum opening degree.

The air source (or hydraulic source) is connected with the reversing valve and then connected with the fluid inlet hole 101, and the fluid outlet hole 102 is connected with an actuating element such as a balance crane, an air cylinder or a hydraulic cylinder. A light hook or clamp is hung below the actuating element. The reversing valve is adjusted to be opened, the air source (or the hydraulic source) supplies high-pressure air or liquid into the valve body 1, and the throttle valve 13 of the normally-open self-operated throttling channel a is slowly adjusted, so that the lifting hook or the clamp rises at a proper speed.

The hook or the clamp is provided with a light workpiece, the reversing valve is opened, the adjusting piece 31 is adjusted to enable the workpiece to rise at a proper speed, and at the moment, the normally closed self-force throttling channel b is in a partially opened state under the action of outlet pressure.

When a heavy workpiece is mounted on a hook or a clamp, when the workpiece is lifted by opening a reversing valve, the pressure in an air cylinder (or a hydraulic cylinder or a balance crane) is at a high level, the pressure in a pressure cavity 104 is high, the valve core 2 is pushed to move towards the end of the elastic element 32 until the workpiece is balanced, the normally closed self-throttling channel b is completely opened (the normally open self-throttling channel a is completely closed), high-pressure fluid can smoothly enter the air cylinder (the hydraulic cylinder or the balance crane) through the normally closed self-throttling channel b and the throttle valve 13 behind the normally closed self-throttling channel b, and the lifting speed can be kept in a proper state at the moment.

When the work piece is lowered by adjusting the reversing valve, the air cylinder (hydraulic cylinder or balance crane) discharges fluid outwards, the throttle valve 13 is in a closed state at the moment, the fluid can be discharged outwards only through the normally closed self-operated throttling channel b, and the work piece can be lowered at a proper low speed by adjusting the throttle valve 13 at the position, so that the safety fault caused by the high-speed lowering of the heavy object is avoided.

The self-operated adjustable bidirectional throttle valve has the beneficial effects that:

1. the invention controls the valve core 2 to slide by utilizing the pressure change of the flow channel 12 when the load is different, so as to automatically control the opening degrees of the normally open self-operated throttling channel a and the normally closed self-operated throttling channel b, and compared with a speed stabilizing mechanism and a pressure feed type speed stabilizing valve of a control valve of CN201810418846.5, the invention greatly reduces the volume and the number of elements and increases the reliability by arranging at least two flow channels 21 on one valve core 2, and can enable pneumatic equipment or hydraulic equipment to realize the automatic throttling of air (liquid) intake and air (liquid) exhaust by connecting the throttling valve 13 on the flow channel 12 in series.

2. According to the invention, the elastic adjusting component 3 is arranged, so that the starting pressure of automatic throttling can be set according to different load conditions; the speed control device can set the moving speed of cylinders (hydraulic cylinders) with different sizes in no-load operation and set the load heavy-load descending operation speed with different weights, and solves the problems that the throttle starting pressure is not adjustable and the no-load and heavy-load operation speeds are not adjustable in the conventional speed stabilizing mechanism and pressure feed type speed stabilizing valve of the CN201810418846.5 control valve.

3. The invention can reduce and adjust the lifting speed of a lighter load, and avoids the danger to operators caused by the quick extension of the piston rod when the air cylinder, the hydraulic cylinder and the balance crane are in no-load or low-load. The speed of the descent can be adjusted to a controllable range for heavier loads, and the products or equipment can be prevented from being broken. The safety accidents caused by too high running speed are avoided. The invention is non-electric control, has simple structure, easy operation, high reliability and low manufacturing cost, and can be applied to flammable and explosive working environments. Meanwhile, the speed control device does not need manual adjustment in the working process, can automatically make corresponding speed adjustment on different load conditions, and is simple and efficient to operate.

Compared with the prior art, the self-operated adjustable bidirectional throttle valve has the advantages that the valve body 1 is provided with at least two groups of flow channels 12, the valve core 2 is provided with at least two flow channels 21, when the fluid pressure of the valve core 2 is controlled to be minimum, the flow channel 21 of one valve core 2 can be communicated with one group of flow channels 12 of the valve body 1 to form a normally open self-operated throttling channel a, the opening of the flow channel 21 of the valve core 2 in the normally open self-operated throttling channel a (namely a flow inlet channel) is minimum, the phenomenon that the flow inlet speed is too high is avoided, the opening of the flow channel is enlarged when the pressure is higher, and the flow inlet speed is increased; when the fluid pressure of the valve core 2 is controlled to be maximum, the opening of the flow passage 21 of the valve core 2 in the normally closed self-operated throttling passage b (namely, the outflow passage) is minimum, so that the excessive high outflow speed is prevented, the opening of the flow passage is enlarged when the pressure is small, the outflow speed is increased, the fluid pressure of the fluid hole 102 acts on the other end of the valve core 2 and pushes the valve core 2 to move towards the elastic adjusting component 3 until the fluid pressure is balanced with the elastic force, the larger the fluid pressure of the fluid hole 102 is, the larger the moving distance is, the larger the opening or closing amount of the normally open self-operated throttling channel a or the normally closed self-operated throttling channel b is, so that the self-operated adjustable bidirectional throttling combination valve with simple and reliable structure is provided, the automatic adjustment device can achieve the purpose of achieving stable operation by automatic adjustment under different working conditions so as to meet the requirements of various complex working conditions of pneumatic equipment or hydraulic equipment in the operation process. The self-operated adjustable bidirectional throttle valve has the characteristics of simple structure, stable operation, automatic adjustment, high reliability and the like.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A self-operated adjustable two-way throttle valve, comprising:

2. The self-operated adjustable two-way throttle valve of claim 1, wherein: the axis of the valve core is intersected with the axis of the flow passage of the valve body.

3. The self-operated adjustable two-way throttle valve of claim 1, wherein: be provided with in the valve body and adjust chamber and pressure chamber, adjust the chamber with the pressure chamber set up relatively in the both ends of valve body, the pressure chamber with fluid hole intercommunication, the both ends of case respectively towards adjust the chamber with the pressure chamber.

4. The self-operated adjustable two-way throttle valve of claim 3, wherein: the elastic adjusting assembly comprises an adjusting piece and an elastic element, the adjusting piece is adjustably arranged on the valve body, the elastic element is arranged in the adjusting cavity, one end of the elastic element is connected with the adjusting piece, and the other end of the elastic element is connected with one end of the valve core.

5. The self-operated adjustable two-way throttle valve of claim 3, wherein: a gasket is connected to an end of the valve element facing the pressure chamber.

6. The self-operated adjustable two-way throttle valve of claim 5, wherein: and an end cover is arranged on the outer side of the pressure cavity and seals the pressure cavity.

7. The self-operated adjustable two-way throttle valve of claim 1, wherein: the valve core is provided with a plurality of sealing rings along the axial direction, and the sealing rings are abutted to the inner wall of the valve body.

8. The self-operated adjustable two-way throttle valve according to any one of claims 1-7, wherein: each group of flow passages of the valve body is provided with a throttle valve for adjusting the minimum flow.

9. The self-operated adjustable two-way throttle valve of claim 8, wherein: each group of flow passages of the valve body is also provided with a one-way valve for controlling the flow direction of the fluid, and the one-way valve and the throttling valve form a one-way throttling valve.

10. The self-operated adjustable two-way throttle valve of claim 9, wherein: the periphery of the one-way throttle valve is provided with a sealing ring, and the sealing ring is abutted to the inner wall of the valve body.