CN216768362U

CN216768362U - Two-stage pressure differential regulating valve

Info

Publication number: CN216768362U
Application number: CN202220095738.0U
Authority: CN
Inventors: 吴俊明
Original assignee: Shandong Dongvalve Refrigeration Technology Co ltd
Current assignee: Shandong Dongvalve Refrigeration Technology Co ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-06-17
Anticipated expiration: 2032-01-14

Abstract

The utility model belongs to the field of regulating valve application equipment, and particularly relates to a two-stage pressure differential regulating valve which comprises a regulating valve body, wherein the regulating valve body comprises a valve body, a valve cover is arranged at the upper end of the valve body, a low-pressure side spring setting device is arranged at the upper end of the valve cover, a high-pressure side spring setting device is arranged at the upper end of a supporting frame, an annular groove is formed in the valve cover and is matched with the lower end of the low-pressure side spring setting device, an air inlet channel, a backflow channel and a conducting hole are sequentially formed in the annular groove, and a pressure differential induction pipe is arranged at the upper end of an outlet of the valve body and is communicated with the periphery of the low-pressure side spring setting device. The utility model has reasonable design, simple structure and convenient processing, and can open or close the low-pressure side electromagnetic valve according to the actual working condition to realize the switching between high pressure and low pressure so as to drive the medium flow direction of the piston to change and ensure the smooth opening of the valve.

Description

Two-stage pressure differential regulating valve

Technical Field

The utility model belongs to the field of regulating valve application equipment, and particularly relates to a two-stage pressure differential regulating valve.

Background

The regulating valve is also called a control valve, and in the field of industrial automation process control, the final control element for changing the process parameters of medium flow, pressure, temperature, liquid level and the like by power operation through receiving the control signal output by a regulating control unit. Generally consisting of an actuator and a valve. If according to the stroke characteristic, the regulating valve can be divided into a straight stroke and an angular stroke; according to the power used by the matched actuating mechanism, the pneumatic regulating valve, the electric regulating valve and the hydraulic regulating valve can be divided into three types; the method is divided into three types, namely a linear characteristic, an equal percentage characteristic and a parabolic characteristic according to functions and characteristics of the method. The regulating valve is suitable for air, water, steam, various corrosive media, slurry, oil and other media.

At present, a pressure difference regulating valve used in a refrigeration industry system automatically regulates a medium by depending on the pressure change of the regulated medium, so that the pressure difference between an inlet and an outlet of a user is constant, and the system operation is stabilized. In the prior art, the pressure difference regulating valve cannot realize the regulation of multi-stage pressure difference in the use process, namely, the switching between the high-pressure state and the low-pressure state of the inlet-outlet pressure of the valve body cannot be realized according to the actual working condition requirements, so that the use effect of the regulating valve can be influenced to a certain extent, and the use requirements of people cannot be met.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems, the utility model provides the two-stage pressure difference regulating valve which is reasonable in design, simple in structure, convenient to process and capable of effectively realizing switching between high pressure and low pressure in the valve according to actual working conditions so as to meet the use requirements of people.

In order to achieve the purpose, the technical scheme adopted by the utility model is a two-stage pressure differential regulating valve, which comprises a regulating valve body, wherein the regulating valve body comprises a valve body, a valve cover is arranged at the upper end of the valve body, a low-pressure side spring setting device is arranged at the upper end of the valve cover, a support frame is arranged at one side of the valve cover, a high-pressure side spring setting device is arranged at the upper end of the support frame, a low-pressure side electromagnetic valve is also arranged at one side of the valve cover and is communicated with the low-pressure side spring setting device, two cutting edges are symmetrically arranged at the periphery of the valve cover and respectively correspond to the high-pressure side spring setting device and the low-pressure side electromagnetic valve in position, an annular groove is arranged in the valve cover and is matched with the lower end of the low-pressure side spring setting device, an air guide hole is arranged in the valve body, and a conduction channel is arranged at the geometric center in the valve cover, the ring channel in seted up intake duct, backward flow way and conducting hole in proper order, the lower extreme of intake duct and low pressure side spring setting device link up mutually and be located the upper end of air guide hole, backward flow way upper end be provided with the subchannel and be linked together with the lower extreme of intake duct and low pressure side solenoid valve, be close to the valve gap of high pressure side spring setting device one side in still be provided with back the through-hole and be located the lower extreme of conducting hole, the upper end of valve body exit be provided with the pressure differential induction pipe and be linked together with the periphery of low pressure side spring setting device.

Preferably, the air guide hole is formed in the inner side close to the inlet side of the valve body, the return channel is formed in the valve cover close to the low-pressure side electromagnetic valve, the lower end of the low-pressure side electromagnetic valve is communicated with the lower end of the low-pressure side spring setting device, a first inner channel and a second inner channel are formed in the support frame from top to bottom, and the first inner channel and the second inner channel correspond to the through hole and the return through hole in the valve cover respectively.

Preferably, the valve body is connected with a piston in a sliding mode, the lower end in the valve body is connected with a manual opening device in a rotating mode, and a protective cap is sleeved on the periphery of the manual opening device.

Preferably, the support frame is designed in an L shape and is fixedly connected to the periphery of the valve cover, the valve cover is in threaded connection with the upper end of the valve body, the low-pressure side spring setting device is in threaded connection with the upper end of the valve cover, and the high-pressure side spring setting device is in threaded connection with the upper end of the support frame.

Compared with the prior art, the utility model has the advantages and positive effects that,

1. according to the two-stage pressure differential pressure regulating valve, the low-pressure side electromagnetic valve can be opened or closed by a worker according to actual working conditions through the low-pressure side spring setting device and the high-pressure side spring setting device, so that switching of high and low pressure states in the valve is realized, medium flow direction conversion of the driving piston is completed, and smooth opening of the valve is guaranteed; through the valve cover, a pilot medium passing between the low-pressure side spring setting device and the high-pressure side spring setting device can respectively enter the high pressure side and the low pressure side of the device through the annular groove with the annular groove structure without being influenced, and the design can be effectively matched with the low-pressure side spring setting device, so that the sealing use effect of equipment is improved, the leakage of the medium is avoided, and the use performance of the regulating valve is improved; through the pressure difference induction pipe that sets up, can realize responding to valve inlet pressure and outlet pressure, and then guarantee low pressure side spring setting device can carry out the automatic work according to the pressure differential of setting for according to valve inlet pressure and outlet pressure, guarantees the normal use of governing valve, satisfies people's user demand.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic structural diagram of a two-stage differential pressure regulator;

FIG. 2 is a top view of the dual stage differential pressure regulator from another perspective;

FIG. 3 is a cross-sectional view of the high-side operation at A-A in FIG. 2;

FIG. 4 is a cross-sectional view of the structure of the low-pressure side operation at A-A in FIG. 2;

FIG. 5 is a schematic structural view of a valve cover;

in the above figures, 1, a valve body is adjusted; 2. a valve body; 21. an air vent; 3. a valve cover; 31. an annular groove; 32. a conduction channel; 33. an air inlet channel; 34. a return channel; 35. a via hole; 36. returning to the through hole; 4. a low-pressure side spring setting device; 5. a support frame; 51. a first internal passage; 52. a second internal passage; 6. a high-pressure side spring setting device; 7. a low-pressure side electromagnetic valve; 8. a piston; 9. a manual opening device; 10. a protective cap; 11. a differential pressure sensing tube.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the present invention is not limited to the specific embodiments disclosed in the following description.

In an embodiment, as shown in fig. 1, fig. 2, fig. 3, and fig. 4, a two-stage pressure-difference regulating valve includes a regulating valve body 1, where the regulating valve body 1 includes a valve body 2, a valve cover 3 is disposed at an upper end of the valve body 2, a low-pressure-side spring setting device 4 is disposed at an upper end of the valve cover 3, a support frame 5 is disposed on one side of the valve cover 3, and a high-pressure-side spring setting device 6 is disposed at an upper end of the support frame 5, in the above process, it needs to be further explained that: the inlet pressure of the low-pressure side is not larger than the pressure value set by the high-pressure side spring setting device 6, so that the normal use of the device equipment is ensured; a low-pressure side electromagnetic valve 7 is further arranged on one side of the valve cover 3 and is communicated with the low-pressure side spring setting device 4, and the power-on and power-off states of the low-pressure side electromagnetic valve 7 can control the on-off state of a medium fluid system, the flow direction of fluid, the pressure and the like, so that the practicability of the regulating valve is effectively improved; the periphery of the valve cover 3 is symmetrically provided with two cut edges which correspond to the positions of the high-pressure side spring setting device 6 and the low-pressure side electromagnetic valve 7 respectively, so that the convenience of placing equipment components is improved, the annular groove 31 is formed in the valve cover 3 and is matched with the lower end of the low-pressure side spring setting device 4, a pilot medium can conveniently enter the high-pressure side and the low-pressure side respectively through the valve cover 3 with the annular groove 31 structure, and convenience is brought to the practical use of equipment; in order to ensure that the regulating valve can be normally used and meet the use requirements of people, an air guide hole 21 is arranged in the valve body 2, a conduction channel 32 is arranged at the geometric center in the valve cover 3, an air inlet channel 33, a return channel 34 and a conduction hole 35 are sequentially arranged in the annular groove 31, the valve cover 3 is also provided with a through groove, one end of the through groove is connected with an air inlet, and the other end of the through groove is communicated with the low-pressure side electromagnetic valve 7, so that the follow-up low-pressure side electromagnetic valve 7 can complete the conveying of a pilot medium in an electrified state; the air inlet channel 33 is communicated with the lower end of the low-pressure side spring setting device 4 and is positioned at the upper end of the air guide hole 21, the upper end of the return channel 34 is provided with a branch channel and is communicated with the lower ends of the air inlet channel 33 and the low-pressure side electromagnetic valve 7, the valve cover 3 close to one side of the high-pressure side spring setting device 6 is also internally provided with a return through hole 36 and is positioned at the lower end of the conducting hole 35, the upper end of the outlet of the valve body 2 is provided with a differential pressure induction tube 11 and is communicated with the periphery of the low-pressure side spring setting device 4, and the differential pressure induction tube 11 is mainly used for inducing the inlet pressure and the outlet pressure of the valve, so that the low-pressure side spring setting device 4 can automatically work according to the set pressure difference between the inlet pressure and the outlet pressure of the valve, the normal use of the regulating valve is ensured, and the use requirements of people are met; the working principle of the process is as follows: when low pressure side solenoid valve 7 is when the outage state, the electromagnetic force disappears, presses low pressure side spring setting device 4 on valve gap 3, causes the valve to close to make the high pressure side (be high pressure side spring setting device 6) function, according to the set pressure, its medium specifically moves towards and does: the medium entering from the inlet of the valve body 2 firstly enters the air guide hole 21 and flows into the valve cover 3 through the air inlet 33, under the action of the annular groove 31 structure, the pilot medium is supported to the high-pressure side spring setting device 6 through the through hole 35 and the first internal channel 51, passes through the valve cover 3 through the second internal channel 52 and the return through hole 36 and is supported to the upper end of the piston 8, and can push the piston 8 to move downwards, so that the valve is opened, the high-pressure medium is guided out, and convenience is brought to the use of people; when the low-pressure side solenoid valve 7 is in an energized state, the solenoid coil generates electromagnetic force to lift the low-pressure side spring setting device 4 from the valve body 2, and the low-pressure side (i.e. the low-pressure side spring setting device 4) operates to ensure that a medium can enter the middle cavity of the valve cover 3, and the medium enters the valve body 2 through the conduction channel 32, so that the medium pushes the piston 8 to move down to complete the opening of the valve, and the specific trend of the medium is as follows: the medium entering from the inlet of the valve body 2 enters the air inlet 33 in the valve cover 3 through the air guide hole 21 and simultaneously enters the low-pressure side electromagnetic valve 7 through the through groove, when the coil of the electromagnetic valve is electrified, the coil enters the middle cavity of the valve cover 3 through the return passage 34, further passes through the valve cover 3 through the conduction passage 32 and abuts against the upper end of the piston 8, and can push the piston 8 to move downwards so as to open the valve and guide the low-pressure medium out, so that convenience is brought to people to use, and therefore people can open or close the low-pressure side electromagnetic valve 7 according to working conditions to realize switching between high pressure and low pressure, the medium flow direction of the piston 8 is driven to change, the normal use of the regulating valve is ensured, and the use requirements of people are met; in the process: through the arrangement of the low-pressure side spring setting device 4 and the high-pressure side spring setting device 6, a worker can open or close the low-pressure side electromagnetic valve 7 according to actual working conditions, so that switching of high and low pressure states in the valve is realized, medium flow direction conversion of the driving piston 8 is completed, and smooth opening of the valve is guaranteed; through the valve gap 3 that sets up, the guide medium that passes through between low pressure side spring setting device 4 and the high pressure side spring setting device 6 can enter into the high in the device respectively, the low pressure side and not influenced via the annular that has the ring channel 31 structure, and this design can carry out effective adaptation with low pressure side spring setting device 4, has promoted the sealed result of use of equipment, avoids the medium to take place to leak, promotes the performance of governing valve.

In order to improve the design reasonableness of the device, the air guide hole 21 is arranged in the inner part close to one side of the inlet of the valve body 2, so that convenience is brought to the introduction of a medium into the valve body, the stability of the valve body 2 in the using process is effectively improved, the protection performance of equipment in the using process is enhanced, the valve body 2 is not easily damaged, the service life of the device is effectively prolonged, and the economic cost is saved; the return passage 34 is arranged in the valve cover 3 at one side close to the low-pressure side electromagnetic valve 7, and communicates the lower end of the low-pressure side electromagnetic valve 7 with the lower end of the low-pressure side spring setting device 4, so as to bring convenience to smoothly guide the medium passing through the low-pressure side electromagnetic valve 7 into the low-pressure spring setting device when the low-pressure side electromagnetic valve 7 is electrified; first inner channel 51 and second inner channel 52 have been seted up from top to bottom in the support frame 5, and first inner channel 51 and second inner channel 52 correspond with conducting hole 35 and return through-hole 36 in the valve gap 3 respectively to satisfy low pressure side solenoid valve 7 under the outage state, guarantee going on smoothly of high pressure side transported substance, in order to satisfy people's different user demands.

In order to meet various adjusting requirements of the adjusting valve in the using process, a piston 8 is connected in the valve body 2 in a sliding mode, and the piston 8 moves axially in a valve cavity of the valve so as to meet adjusting requirements of people on the medium in the moving process; in order to promote the practicality in the governing valve use, the lower extreme in the valve body 2 rotates and is connected with manual opening device 9, and the periphery cover of manual opening device 9 is equipped with helmet 10, through the manual opening device 9 that sets up, can be carried out the manual governing valve of opening by the staff, can effectively protect manual opening device 9 through helmet 10 to guarantee manual opening device 9's quality of use.

In order to facilitate the installation process of the regulating valve, the support frame 5 is designed in an L shape and is fixedly connected to the periphery of the valve cover 3 so as to provide a convenient condition for placing the high-pressure side spring setting device 6, during the installation process, it is required to ensure that the first internal channel 51 and the second internal channel 52 in the support frame 5 can be aligned with the through hole 35 and the return through hole 36 in the valve cover 3, and meanwhile, the connection part of the device components is sealed so as to ensure the normal use of the device equipment; in order to effectively improve the installation process of the device equipment, the valve cover 3 is in threaded connection with the upper end of the valve body 2, the low-pressure side spring setting device 4 is in threaded connection with the upper end of the valve cover 3, the high-pressure side spring setting device 6 is in threaded connection with the upper end of the support frame 5, the threaded connection mode is adopted, the operation is simple, the connection between the device parts is convenient to realize, and meanwhile, people can conveniently maintain and replace the equipment.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The utility model provides a doublestage pressure differential governing valve, includes the governing valve body, the governing valve body include the valve body, its characterized in that, valve body upper end be provided with the valve gap, valve gap upper end be provided with low pressure side spring setting device, valve gap one side be provided with the support frame, support frame upper end be provided with high pressure side spring setting device, valve gap one side still be provided with low pressure side solenoid valve and switch on with low pressure side spring setting device mutually, valve gap periphery symmetry be provided with two cut edges and respectively with the position of high pressure side spring setting device and low pressure side solenoid valve corresponding, the valve gap in seted up the ring channel and with the lower extreme looks adaptation of low pressure side spring setting device, the valve body in be provided with the air guide hole, the geometric center department in the valve gap be provided with the conduction channel, the ring channel in seted up intake duct, intake duct in proper order, Return flow and conducting hole, the lower extreme of intake duct and low pressure side spring setting device link up mutually and be located the upper end of air guide hole, return flow upper end be provided with the subchannel and be linked together with the lower extreme of intake duct and low pressure side solenoid valve, be close to the valve gap of high pressure side spring setting device one side in still be provided with back the through-hole and be located the lower extreme of conducting hole, the upper end of valve body exit be provided with the pressure differential induction pipe and be linked together with the periphery of low pressure side spring setting device.

2. The two-stage pressure-differential regulating valve according to claim 1, wherein the air-vent is disposed inside the valve body on the side close to the inlet, the return channel is disposed inside the valve cover on the side close to the low-pressure-side solenoid valve and connects the lower end of the low-pressure-side solenoid valve to the lower end of the low-pressure-side spring setting device, the support frame is provided with a first internal channel and a second internal channel at the top and bottom, and the first internal channel and the second internal channel respectively correspond to the through hole and the return hole in the valve cover.

3. The dual-stage pressure-difference regulating valve according to claim 2, wherein the valve body is slidably connected with a piston, the lower end inside the valve body is rotatably connected with a manual opening device, and a protective cap is sleeved on the periphery of the manual opening device.

4. The two-stage pressure-differential regulating valve according to claim 3, wherein the support frame is L-shaped and is fixedly connected to the outer periphery of the valve cover, the valve cover is screwed to the upper end of the valve body, the low-pressure side spring setting device is screwed to the upper end of the valve cover, and the high-pressure side spring setting device is screwed to the upper end of the support frame.