CN218094303U

CN218094303U - Multistage regulation type angle type throttle valve

Info

Publication number: CN218094303U
Application number: CN202222079469.1U
Authority: CN
Inventors: 陈凡; 胡军荣; 朱国强
Original assignee: Zhejiang Saijie Valve Manufacturing Co ltd
Current assignee: Zhejiang Saijie Valve Manufacturing Co ltd
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2022-12-20
Anticipated expiration: 2032-08-08

Abstract

The utility model discloses a multistage adjustment type angle type choke valve solves the big scheduling problem of flow control unstability, sealed face erosion and abrasion. The lower part of the valve core is provided with a plurality of outer ring platforms along the axial direction, the inner peripheral position of the valve seat is provided with a plurality of inner ring platforms protruding towards the central direction, the inner ring platforms and the outer ring platforms are arranged in series and correspond to each other, and a plurality of throttling cavities are formed between the inner ring platforms and the outer ring platforms when the valve core enters the valve seat; the valve core comprises an inverted cone-shaped frustum, a sealing platform protruding towards the center direction is arranged at the top of the inner periphery of the valve seat, and the sealing platform is in fit with the frustum to form sealing fit. The multistage regulating flow is formed by the zigzag shape of the throttling cavities, the flow is regulated more uniformly by the structural mode, the regulating pressure is stable, the flow speed is reduced to a certain degree, the cavitation phenomenon is reduced, the sealing surface is effectively protected from being directly washed by a medium, the abrasion and the vibration are reduced, and the service life of the valve is prolonged.

Description

Multistage regulation type angle type throttle valve

Technical Field

The utility model belongs to the technical field of the valve and specifically relates to a multistage adjustment type angle type choke valve.

Background

A throttle valve is a valve that controls the flow of fluid by changing the throttle cross-section or throttle length. The valve body of the angle type throttle valve is approximately in a T shape, and the inlet material channel and the outlet flow channel are vertical to each other. However, the conventional angle-type throttle valve cannot uniformly and stably realize flow regulation, has insufficient flow control stability, and has the disadvantages that the medium is throttled at a large flow rate between the throttle valve core and the valve seat, especially at a small gap, the smaller the gap, the larger the flow rate, the eddy current (so-called cavitation phenomenon) is easily generated, the erosion and abrasion to the sealing surface of the valve core and the valve seat are large, and the vibration noise is easily generated.

Disclosure of Invention

The utility model aims at: in order to overcome prior art's defect, the utility model provides a multistage adjustment type angle type choke valve solves the unstable, big scheduling problem of sealed face erosion and wear of flow control.

The technical scheme of the utility model: the valve comprises a valve body, a valve core, a valve rod, a valve seat and a core sleeve, wherein an inlet flow passage and an outlet flow passage are formed in the valve body, the valve core is arranged at the bottom end of the valve rod, the valve seat and the core sleeve are fixed in the valve body, a plurality of outer ring platforms are arranged at the lower part of the valve core along the axial direction of the valve core, a plurality of inner ring platforms protruding towards the central direction are arranged at the inner peripheral position of the valve seat, the inner ring platforms and the outer ring platforms are arranged in series and correspond to each other, and a plurality of throttling cavities are formed between the inner ring platforms and the outer ring platforms when the valve core enters the valve seat; the valve core comprises an inverted cone-shaped frustum, a sealing platform protruding towards the center direction is arranged at the top of the inner periphery of the valve seat, and the sealing platform is in fit with the frustum to form sealing fit.

By adopting the technical scheme, the valve core does not completely enter the valve seat to be in a throttling state, the medium enters the throttling cavity which is horizontally staggered for multiple times from bottom to top, and forms multi-stage regulation flow through the zigzag shape of the throttling cavities.

The utility model discloses a further setting: the periphery wall of case and the inner wall of core cover cooperation of sliding, the core cover is fitted with a contraceptive ring and has been seted up a plurality of groups and has been arranged the punch combination, has two at least bar holes in every group arranges the punch combination, and every bar hole is laid along core cover axial direction from the end to the top, and each bar hole length in every group arranges the punch combination is elongated along core cover circumference direction gradually.

By adopting the further arrangement, the medium flow can be adjusted step by step, the accuracy of controlling the flow and the pressure is higher, the control stability is improved, the capability of balancing the pressure difference is improved, and the stable operation of the valve is ensured.

The utility model discloses a further setting again: the inner diameter of each inner annular platform is gradually increased along the axial direction of the valve seat and the flow direction of the medium.

By adopting the above further arrangement, in a throttling state, the valve core enters the inner annular table inner diameter which is gradually reduced from top to bottom, so that the medium flow area in the throttling cavity is gradually reduced, the capability of gradually adjusting the flow can be further improved, the medium can be guided to flow to the peripheral direction of the frustum, the stress of the valve core is more balanced, and the guiding balance is stable.

The utility model discloses a still further set up: the central axial position of case has seted up central balancing hole, and central balancing hole extends to the bottom surface of valve rod from the case bottom, has the clearance that supplies the medium circulation between valve rod and the case, and the clearance communicates with central balancing hole.

By adopting the above further arrangement, the cavity above the valve core and the inlet flow channel are communicated, the pressure difference is balanced, and the difficulty in opening and closing the valve rod is avoided.

Drawings

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

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic view of the throttling structure of FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the core sleeve according to the present invention;

wherein, 1, a valve body; 2. a valve core; 3. a valve stem; 4. a valve seat; 5. a core sleeve; 11. an inlet flow channel; 12. an outlet flow channel; 21. an outer ring table; 41. an inner ring platform; 20. a throttle chamber; 22. a frustum; 42. a sealing table; 51. arranging the hole groups; 511. a strip-shaped hole; 23. a central balancing hole; 31. a gap.

Detailed Description

As shown in fig. 1-3, the multi-stage adjustable angle throttle valve includes a valve body 1, a valve core 2, a valve rod 3, a valve seat 4, and a core sleeve 5, wherein an inlet channel 11 and an outlet channel 12 are formed in the valve body 1, the inlet channel 11 is perpendicular to the outlet channel 12, the inlet channel 11 flows into a medium from bottom to top, and the outlet channel 12 flows out of the medium from inside to outside; the valve core 2 is arranged at the bottom end of the valve rod 3, the valve seat 4 and the core sleeve 5 are fixed in the valve body 1, the lower part of the valve core 2 is provided with three outer ring platforms 21 along the axial direction, the inner peripheral position of the valve seat 4 is provided with three inner ring platforms 41 protruding towards the central direction, the inner ring platforms 41 and the outer ring platforms 21 are arranged in series and correspond to each other, and a plurality of throttling cavities 20 are formed between the inner ring platforms 41 and the outer ring platforms 21 when the valve core 2 enters the valve seat 4. The upper part of the valve core 2 comprises an inverted cone frustum 22, a sealing platform 42 protruding towards the central direction is arranged at the top of the inner periphery of the valve seat 4, and the sealing platform 42 is attached to the cone frustum 22 in a matching manner to form sealing fit. In the closed state of the valve, the outer annular land 21 completely enters the interior of the inner annular land 41, while the cone 22 bears against the sealing land 42, with the medium not being able to flow through. When the valve is opened, the valve core 2 rises, the frustum 22 is separated from the sealing table 42, the outer annular table 21 of the valve core 2 gradually exits the inner annular table 41, the throttling cavity 20 staggered for multiple times is gradually formed, and the valve is in a throttling state, so that multi-stage flow regulation can be realized, flow control is uniform, and pressure regulation is stable.

As shown in fig. 4, the outer peripheral wall of the upper portion of the valve core 2 is slidably engaged with the inner wall of the core sleeve 5, four sets of arrangement hole groups 51 are disposed on the core sleeve 5, each set of arrangement hole groups 51 has at least two strip-shaped holes 511 therein, each strip-shaped hole 511 is disposed from bottom to top along the axial direction of the core sleeve 5 to form the length direction of the strip-shaped hole 511, and the length of each strip-shaped hole 511 in each set of arrangement hole groups 51 is gradually increased along the circumferential direction of the core sleeve 5. In the process of moving the valve core 2 upwards to open the valve, the medium flow area in the strip-shaped hole 511 is firstly large and then gradually reduced, so that the control precision is improved.

The inner diameter of each inner annular land 41 is gradually increased along the axial direction of the valve seat 4 and the medium flow direction, that is, the inner diameter of each inner annular land 41 is shaped like a trumpet. When the valve core 2 is adjusted and moved, the medium can be guided to flow to the peripheral direction of the frustum 22, and the direct flushing of the sealing surface of the sealing platform 42 is avoided.

The central axial position of the valve core 2 is provided with a central balance hole 23, the central balance hole 23 extends from the bottom end of the valve core 2 to the bottom surface of the valve rod 3, a gap 31 for medium circulation is arranged between the valve rod 3 and the valve core 2, the gap 31 is communicated with the central balance hole 23, so that a cavity above the valve core 2 and the medium of the inlet flow passage 11 are communicated with each other, the pressure at two positions is balanced, and the valve rod 3 is opened and closed easily.

Claims

1. The utility model provides a multi-stage control type angle mode choke valve, is including valve body, case, valve rod, disk seat and core cover, seted up inlet flow channel and export flow channel in the valve body, the case is installed in the bottom of valve rod, in disk seat and the core cover were fixed in the valve body, its characterized in that: the lower part of the valve core is provided with a plurality of outer ring platforms along the axial direction of the valve core, the inner circumference of the valve seat is provided with a plurality of inner ring platforms protruding towards the center direction, the inner ring platforms and the outer ring platforms are arranged in series and correspond to each other, and a plurality of throttling cavities are formed between the inner ring platforms and the outer ring platforms when the valve core enters the valve seat; the valve core comprises an inverted cone-shaped frustum, a sealing platform protruding towards the center direction is arranged at the top of the inner periphery of the valve seat, and the sealing platform is matched with the frustum in an attaching mode to form sealing fit.

2. The multi-stage adjustment type angle throttle valve of claim 1, characterized in that: the periphery wall of case and the inner wall of core cover cooperation of sliding, a plurality of groups of arrangement punch combination, every group have been seted up to the ring cloth on the core cover have been arranged two at least bar holes in the punch combination, every the bar hole is laid along core cover axial direction from the bottom to the top, every group each bar hole length in the arrangement punch combination is elongated along core cover circumference direction gradually.

3. The multi-stage adjustment type angle throttle valve according to claim 1 or 2, characterized in that: the inner diameter of each inner ring platform is gradually increased along the axial direction of the valve seat and the flow direction of the medium.

4. The multi-stage adjustment type angle throttle valve according to claim 1 or 2, characterized in that: the central axial position of the valve core is provided with a central balance hole, the central balance hole extends from the bottom end of the valve core to the bottom surface of the valve rod, a gap for medium circulation is formed between the valve rod and the valve core, and the gap is communicated with the central balance hole.