CN212804299U

CN212804299U - High-temperature high-pressure disc spring structure pilot-operated type regulating valve

Info

Publication number: CN212804299U
Application number: CN202020974365.5U
Authority: CN
Inventors: 彭晨飞; 李生龙
Original assignee: Zhejiang Yongsheng Technology Co ltd
Current assignee: Zhejiang Yongsheng Technology Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-03-26
Anticipated expiration: 2030-06-01

Abstract

The utility model relates to a valve especially relates to a high temperature high pressure dish spring structure guide's formula governing valve. High temperature high pressure dish spring structure guide's formula governing valve, which comprises a valve body, a valve seat, case and valve rod, the case includes main valve core and the pilot valve core of setting in the main valve core, main valve core middle part sets up and holds the chamber, it is the open end to hold the chamber upper end, the pilot valve core is set up in holding intracavity portion and with the inner wall sliding connection who holds the chamber by the open end, the bottom surface center department of main valve core extends towards the direction that holds intracavity portion and is provided with the position sleeve, the cover is equipped with dish spring group on the position sleeve, dish spring group one end butt is at pilot valve core bottom surface, other end butt is at the interior bottom surface of main valve core, it has the retaining ring for the axle to hold the joint on the inner wall that the. The utility model discloses have can balance case pressure effectively, the leakproofness is high, the regulation precision is high, stability is strong, can adapt to beneficial effect such as the highly compressed operating mode condition of high temperature.

Description

High-temperature high-pressure disc spring structure pilot-operated type regulating valve

Technical Field

The utility model relates to a valve especially relates to a high temperature high pressure dish spring structure guide's formula governing valve.

Background

The working performance of the regulating valve, which is a key actuating element in industrial control, directly determines the precision and safety of industrial process control. The conventional sleeve regulating valve is subjected to overlarge external pressure in the use process, cannot meet the requirement of tight sealing and often has the problem of large leakage amount.

SUMMERY OF THE UTILITY MODEL

The utility model discloses mainly be to above-mentioned problem, provide one kind can balance case pressure effectively, the leakproofness is high, the regulation precision is high, stability is strong, can adapt to the highly compressed operating mode's of high temperature governing valve.

The purpose of the utility model is mainly realized by the following scheme: the high-temperature high-pressure disc spring structure pilot-operated type regulating valve comprises a valve body, a valve seat, a valve core and a valve rod, wherein the valve core comprises a main valve core and a pilot valve core arranged in the main valve core, one end of the pilot valve core is fixedly connected with the valve rod, a containing cavity is arranged in the middle of the main valve core, the upper end of the containing cavity is an open end, the pilot valve core is arranged in the containing cavity and is in sliding connection with the inner wall of the containing cavity through the open end, a positioning sleeve extends towards the direction in which the inside of the containing cavity is arranged at the center of the bottom surface of the main valve core, a disc spring group is sleeved on the positioning sleeve, one end of the disc spring group is abutted to the bottom surface of the pilot valve core, the other end of the disc spring group is abutted to the inner bottom. The valve rod drives the valve core to move up and down in the valve body, the flow of a medium flowing through the valve body is adjusted by adjusting the size of a gap between the valve core and the valve seat, and the adjustment of the adjusting valve is realized. The case is formed by main valve core and pilot valve core assembly, it holds the chamber to have set up in the main valve core, main valve core's bottom center department orientation holds the chamber direction and extends and has the position sleeve, the dish spring group is established to the cover on the position sleeve, insert the pilot valve core by the open end that holds the chamber and hold the intracavity, at this moment, the bottom and the butt of dish spring group of pilot valve core, keep away from the pot head of dish spring group at the pilot valve core and establish the fender ring, keep off ring top installation for the shaft retaining ring again, make the retaining ring for the shaft and hold the inner wall joint of chamber open end, it is spacing to keep off the ring to utilize the retaining ring for the shaft, it is spacing to the pilot. The position sleeve can be used for axially positioning the disc spring group, avoiding the dislocation of the disc spring group and strengthening the structure of the main valve core. When the valve is opened, the pilot valve core is opened first, the pressure in the main valve core is released, and the main valve core has damping effect, so that the pressure in the main valve core and the pressure at the inlet of the valve generate larger pressure difference, and the operation torque is reduced. When the valve is closed, the unbalanced force acting on the valve core can be used as sealing force, so that the sealing grade can be improved, and the stability of the valve core in the working process is ensured by utilizing the disc spring group.

Preferably, one end of the pilot valve core, which is far away from the positioning sleeve, is coaxially provided with a connecting column, and the valve rod is in threaded connection with the connecting column. The end of the pilot valve core, which is far away from the positioning sleeve, is coaxially provided with the connecting column, the connecting column is utilized to connect the valve rod, and the axial acting force of the valve rod can be directly transmitted to the connecting column and transmitted to the pilot valve core through the connecting column.

Preferably, a rotation stopping pin is arranged between the connecting column and the valve rod in a radially penetrating mode. The valve rod is in threaded connection with the connecting column and then is in radial through connection through the rotation stopping pin, the limiting of the connecting column and the valve rod is achieved, and the connecting column and the valve rod are prevented from rotating relatively.

Preferably, a positioning boss is arranged on the axial line of the bottom surface of the pilot valve core, the positioning boss is in a circular truncated cone shape, and the minimum diameter of the positioning boss is smaller than or equal to the inner diameter of the positioning sleeve. The bottom axis of the pilot valve core is provided with a positioning boss, the positioning boss is in a cone shape with gradually changed diameter, the diameter of one end of the minimum diameter of the positioning boss is smaller than or equal to the inner diameter of the positioning sleeve, when the pilot valve core moves downwards to the positioning sleeve, the positioning boss can abut against the positioning sleeve and is limited by the positioning sleeve, and the inner diameter hole of the positioning sleeve is sealed by the positioning boss.

Preferably, the inner wall of the positioning sleeve is provided with an annular clamping groove, a diaphragm with a concave middle part is clamped in the annular clamping groove, the edge of the diaphragm is connected with a positioning ring, and the positioning ring is positioned in the annular clamping groove. The inner wall of the positioning sleeve is provided with the annular clamping groove, the middle part of the diaphragm is concave and can retract and deform, the diaphragm and the positioning ring at the edge can be clamped into the inner wall of the positioning sleeve conveniently, and the positioning ring can be clamped into the annular clamping groove through self elastic expansion when reaching the annular clamping groove. The middle part of the diaphragm is concave downwards, so that the diaphragm can deform towards the side with small pressure when the upper end and the lower end of the diaphragm are under pressure, and the effect of balancing pressure difference is achieved. When the diaphragm deforms towards the upper side and the lower side, instant elastic force can be applied to the medium or air at one end of the diaphragm in the deformation direction at the deformation instant, namely, reaction force is exerted on the pilot valve core or the main valve core, and the integral sealing performance is enhanced by utilizing the unbalanced force.

Preferably, the height of the ring clamping groove is larger than the thickness of the positioning ring. Ring groove's the thickness that highly is greater than the holding ring, the installation of the holding ring of being convenient for, can make the holding ring at diaphragm and edge preferentially produce axial displacement in ring groove when diaphragm one end atress moreover, can balance the both ends pressure differential at this in-process, when the holding ring reachs ring groove's edge, the diaphragm continues the atress and takes place to warp.

Preferably, the main valve core and the positioning sleeve are integrally formed.

Preferably, a valve cage is arranged on the valve seat, the valve core is positioned in the valve cage, and the main valve core is connected with the inner wall of the valve cage in a sliding mode.

Therefore, the utility model discloses a high temperature high pressure dish spring structure guide's formula governing valve possesses following advantage: when the valve is opened, the pilot valve core is opened first, the pressure in the main valve core is released, and the main valve core has damping effect, so that the pressure in the main valve core and the pressure at the inlet of the valve generate larger pressure difference, and the operation torque is reduced. When the valve is closed, the unbalanced force acting on the valve core can be used as sealing force, so that the sealing grade can be improved, and the stability of the valve core in the working process is ensured by utilizing the disc spring group.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of a valve core in embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a main valve element in embodiment 2 of the present invention.

Illustration of the drawings: 1-valve body, 2-valve seat, 3-valve cage, 4-valve cover, 5-stud bolt, 6-packing group, 7-spacer ring, 8-packing gland, 9-actuator, 10-valve rod, 11-main valve core, 12-pilot valve core, 13-positioning sleeve, 14-positioning boss, 15-disc spring group, 16-retaining ring, 17-shaft retaining ring, 18-connecting column, 19-rotation stopping pin, 20-annular clamping groove, 21-positioning ring and 22-diaphragm.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1: as shown in fig. 1 and 2, the pilot-operated type regulating valve with the high-temperature and high-pressure disc spring structure comprises a valve body 1, a valve cover 4, a valve seat 2, a valve core, a valve rod 10, a packing group 6, a spacer ring 7 in the packing group, a packing gland 8 and an actuating mechanism 9 for driving the valve rod, wherein the valve body and the valve cover are fixedly connected through a stud bolt 5. The valve seat is provided with a valve cage 3, the valve core is positioned inside the valve cage, and the main valve core is connected with the inner wall of the valve cage in a sliding manner. The case includes main valve core 11 and sets up pilot valve core 12 in the main valve core, and the one end and the valve rod fixed connection of pilot valve core, main valve core middle part set up and hold the chamber, hold the chamber upper end for the open end, the pilot valve core set up in holding intracavity portion and with hold the inner wall sliding connection in chamber by the open end, the bottom surface center department of main valve core is provided with the position sleeve towards the direction extension that holds intracavity portion, main valve core and position sleeve 13 integrated into one piece. The positioning sleeve is sleeved with a disc spring group 15, one end of the disc spring group is abutted to the bottom surface of the pilot valve core, the other end of the disc spring group is abutted to the inner bottom surface of the main valve core, a shaft check ring 17 is clamped on the inner wall of the containing cavity close to the opening end, and a check ring 16 is arranged between the shaft check ring and the pilot valve core. One end of the pilot valve core, which is far away from the positioning sleeve, is coaxially provided with a connecting column 18, and the valve rod is in threaded connection with the connecting column. The stop pin 19 radially penetrates between the connecting column and the valve rod, the positioning boss 14 is arranged on the axial line of the bottom surface of the pilot valve core, the positioning boss is in a circular truncated cone shape, and the minimum diameter of the positioning boss is smaller than or equal to the inner diameter of the positioning sleeve.

The valve rod drives the valve core to move up and down in the valve body, the flow of a medium flowing through the valve body is adjusted by adjusting the size of a gap between the valve core and the valve seat, and the adjustment of the adjusting valve is realized. The case is formed by main valve core and pilot valve core assembly, it holds the chamber to have set up in the main valve core, main valve core's bottom center department orientation holds the chamber direction and extends and has the position sleeve, the dish spring group is established to the cover on the position sleeve, insert the pilot valve core by the open end that holds the chamber and hold the intracavity, at this moment, the bottom and the butt of dish spring group of pilot valve core, keep away from the pot head of dish spring group at the pilot valve core and establish the fender ring, keep off ring top installation for the shaft retaining ring again, make the retaining ring for the shaft and hold the inner wall joint of chamber open end, it is spacing to keep off the ring to utilize the retaining ring for the shaft, it is spacing to the pilot. The position sleeve can be used for axially positioning the disc spring group, avoiding the dislocation of the disc spring group and strengthening the structure of the main valve core. When the valve is opened, the pilot valve core is opened first, the pressure in the main valve core is released, and the main valve core has damping effect, so that the pressure in the main valve core and the pressure at the inlet of the valve generate larger pressure difference, and the operation torque is reduced. When the valve is closed, the unbalanced force acting on the valve core can be used as sealing force, so that the sealing grade can be improved, and the stability of the valve core in the working process is ensured by utilizing the disc spring group. The end of the pilot valve core, which is far away from the positioning sleeve, is coaxially provided with the connecting column, the connecting column is utilized to connect the valve rod, and the axial acting force of the valve rod can be directly transmitted to the connecting column and transmitted to the pilot valve core through the connecting column. The valve rod is in threaded connection with the connecting column and then is in radial through connection through the rotation stopping pin, the limiting of the connecting column and the valve rod is achieved, and the connecting column and the valve rod are prevented from rotating relatively. The bottom axis of the pilot valve core is provided with a positioning boss, the positioning boss is in a cone shape with gradually changed diameter, the diameter of one end of the minimum diameter of the positioning boss is smaller than or equal to the inner diameter of the positioning sleeve, when the pilot valve core moves downwards to the positioning sleeve, the positioning boss can abut against the positioning sleeve and is limited by the positioning sleeve, and the inner diameter hole of the positioning sleeve is sealed by the positioning boss.

Example 2: the structure of this embodiment is substantially the same as that of embodiment 1, except that, as shown in fig. 3, an annular clamping groove 20 is arranged on the inner wall of the positioning sleeve, a diaphragm 22 with a concave middle part is clamped in the annular clamping groove, and the edge of the diaphragm is connected with a positioning ring 21 which is positioned in the annular clamping groove. The height of the annular clamping groove is larger than the thickness of the positioning ring. The inner wall of the positioning sleeve is provided with the annular clamping groove, the middle part of the diaphragm is concave and can retract and deform, the diaphragm and the positioning ring at the edge can be clamped into the inner wall of the positioning sleeve conveniently, and the positioning ring can be clamped into the annular clamping groove through self elastic expansion when reaching the annular clamping groove. The middle part of the diaphragm is concave downwards, so that the diaphragm can deform towards the side with small pressure when the upper end and the lower end of the diaphragm are under pressure, and the effect of balancing pressure difference is achieved. When the diaphragm deforms towards the upper side and the lower side, instant elastic force can be applied to the medium or air at one end of the diaphragm in the deformation direction at the deformation instant, namely, reaction force is exerted on the pilot valve core or the main valve core, and the integral sealing performance is enhanced by utilizing the unbalanced force. Ring groove's the thickness that highly is greater than the holding ring, the installation of the holding ring of being convenient for, can make the holding ring at diaphragm and edge preferentially produce axial displacement in ring groove when diaphragm one end atress moreover, can balance the both ends pressure differential at this in-process, when the holding ring reachs ring groove's edge, the diaphragm continues the atress and takes place to warp.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. The high-temperature high-pressure disc spring structure pilot-operated type regulating valve comprises a valve body, a valve seat, a valve core and a valve rod and is characterized in that the valve core comprises a main valve core and a pilot valve core arranged in the main valve core, one end of the pilot valve core is fixedly connected with the valve rod, a containing cavity is arranged in the middle of the main valve core, the upper end of the containing cavity is an open end, the pilot valve core is arranged in the containing cavity and is in sliding connection with the inner wall of the containing cavity through the open end, a positioning sleeve extends towards the direction in which the cavity is contained in the center of the bottom surface of the main valve core, a disc spring group is sleeved on the positioning sleeve, one end of the disc spring group is abutted to the bottom surface of the pilot valve core, the other end of the disc spring group is abutted to the inner bottom surface of the main valve.

2. The high-temperature high-pressure disc spring structure pilot-operated type regulating valve as claimed in claim 1, wherein a connecting column is coaxially arranged at one end of the pilot valve core away from the positioning sleeve, and the valve rod is in threaded connection with the connecting column.

3. The pilot-operated type regulating valve with the high-temperature and high-pressure disc spring structure as claimed in claim 2, wherein a rotation stopping pin is radially arranged between the connecting column and the valve rod in a penetrating manner.

4. The high-temperature high-pressure disc spring structure pilot-operated type regulating valve according to claim 1, 2 or 3, wherein a positioning boss is arranged on the bottom surface axis of the pilot valve core, the positioning boss is in a circular truncated cone shape, and the minimum diameter of the positioning boss is smaller than or equal to the inner diameter of the positioning sleeve.

5. The high-temperature high-pressure disc spring structure pilot-operated type regulating valve as claimed in claim 1, 2 or 3, wherein the inner wall of the positioning sleeve is provided with a ring-shaped clamping groove, a diaphragm with a concave middle part is clamped in the ring-shaped clamping groove, the edge of the diaphragm is connected with a positioning ring, and the positioning ring is positioned in the ring-shaped clamping groove.

6. The pilot-operated type regulating valve with the high-temperature and high-pressure disc spring structure as claimed in claim 5, wherein the height of the annular clamping groove is greater than the thickness of the positioning ring.

7. A pilot-operated regulator valve with high-temperature and-pressure disc spring structure according to claim 1, 2 or 3, wherein the main spool is integrally formed with the positioning sleeve.

8. A high temperature and high pressure disc spring structure pilot operated type regulating valve according to claim 1, 2 or 3, wherein the valve seat is provided with a valve cage, the valve core is positioned inside the valve cage, and the main valve core is connected with the inner wall of the valve cage in a sliding way.