CN209909211U

CN209909211U - Regulating valve

Info

Publication number: CN209909211U
Application number: CN201920429411.0U
Authority: CN
Inventors: 朱东升; 吴仪阳; 高利利
Original assignee: NANTONG POWER STATION VALVE CO Ltd
Current assignee: NANTONG POWER STATION VALVE CO Ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2020-01-07
Anticipated expiration: 2029-04-01

Abstract

The utility model relates to the technical field of valves, in particular to a regulating valve, a straight-through flow passage is arranged in a valve body, two valve seats are arranged at two sides of the straight-through flow passage respectively, a valve core is arranged between the two valve seats, the lower end of a valve rod is connected with the valve core, the upper end of the valve rod is connected with an actuating mechanism, a valve cover is arranged at the top of the valve body and sleeved at the outer side of the valve rod, and a sealing structure is arranged between the valve cover and the valve body; the valve core is composed of a left half valve core and a right half valve core, an elastic part is arranged between the left half valve core and the right half valve core, and the bottom of the valve core is provided with a regulating port for regulating flow. The utility model is a straight stroke type regulating valve with simple flow path, the medium is straight, the flow resistance is small, the flow capacity is large, the sediment is not easy to form, the anti-blocking performance is good, and the sealing surface has the self-cleaning function; can be used for turning off and adjusting at the same time, and meets the requirements of the existing users on higher and higher sealing performance of the adjusting valve.

Description

Regulating valve

Technical Field

The utility model belongs to the technical field of the valve, specifically a straight stroke formula governing valve.

Background

In the field of industrial automation process control, a final control element for changing process parameters such as medium flow, pressure, temperature, liquid level and the like by receiving a control signal output by an adjusting control unit and by means of power operation is generally composed of an actuating mechanism and a valve, and if the adjusting valve is in a straight stroke and an angular stroke according to stroke characteristics, the adjusting valve can be divided into a straight stroke and an angular stroke.

The existing straight stroke type regulating valve is characterized by complicated flow path, large flow resistance, small flow capacity, large vortex dead zone caused by complicated flow path, and the phenomenon that a valve core is not closed and opened easily because a medium is precipitated at the accessory of a throttling port to cause blockage; the sealing grade of the single-seat regulating valve can reach V grade, but the single-seat regulating valve is only suitable for small-caliber low-pressure-difference environments; the cage type regulating valve is suitable for a large-caliber high-pressure-difference environment, but the sealing grade of the cage type regulating valve is only IV grade, and internal leakage or external leakage is easy to occur; the flow curve of the angle type regulating valve is not good, and the angle type regulating valve is not suitable for the environment with higher flow characteristic requirement; the straight stroke type regulating valve is limited by the structure, and the high-pressure working condition body cover is connected by adopting a bolt structure, so that leakage is easy to occur; in addition, the straight stroke type regulating valve and part of the angle type regulating valves are one-way valves, and the defect of limited installation direction is also caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple governing valve of straight stroke formula flow path, the medium is straight-through, and the flow resistance is little, and the circulation ability is big, combines the advantage of straight stroke and angle type governing valve, can do the turn-off simultaneously and adjust the use, satisfies current user to the demand that the regulating valve sealing performance required more and more height.

In order to solve the technical problem, the utility model provides a regulating valve, including valve body, case, disk seat, valve rod, valve gap and actuating mechanism, be equipped with the direct runner in the valve body, the quantity of disk seat is two, sets up respectively in the both sides of direct runner, the case sets up in the middle of two disk seats, the lower extreme of valve rod with the case is connected, the upper end of valve rod is connected actuating mechanism, the valve gap set up the top cover of valve body establish the outside of valve rod, the valve gap with be equipped with seal structure between the valve body; the valve core is composed of a left half valve core and a right half valve core, an elastic part is arranged between the left half valve core and the right half valve core, and the bottom of the valve core is provided with a regulating port for regulating flow.

The left half valve core and the right half valve core are symmetrically arranged, the left half valve core and the right half valve core are fixed through a valve core stop block, a valve core frame is sleeved outside the valve core stop block, and the valve core frame is fixedly connected with the lower end of the valve rod.

Specifically, the upper end of the valve core frame is fixed with the lower end of the valve rod through a pin shaft after being in threaded connection.

Preferably, seal structure includes sealing washer, backing ring and four ring openings, sealing washer and backing ring all set up between valve gap and the valve body, the sealing washer sets up the below of backing ring, four ring openings set up the top of backing ring, one side of four ring openings with the valve gap is hugged closely, and the opposite side inlays and is adorned in the valve body.

Specifically, the sealing ring comprises an upper portion attached to the cushion ring and a lower portion attached to the valve cover, the cross section of the upper portion is square, and the cross section of the lower portion is a right-angled triangle.

Furthermore, the adjusting port comprises a plurality of small holes and at least one window, and the sectional area of the window is changed in a step mode along the moving direction of the valve core.

Further, the adjusting port comprises a plurality of small holes or at least one window, and the sectional area of the window is changed in a step mode along the moving direction of the valve core.

Furthermore, the number of the elastic pieces is several, and the elastic pieces are sequentially and transversely arranged in the valve core.

Specifically, be connected through the stand between actuating mechanism and the valve body, be equipped with the scale tablet on the stand, be equipped with on the valve rod with the relative indicating part of scale tablet.

The utility model has the advantages that:

1. the utility model is a straight stroke type regulating valve with simple flow path, the medium is straight, the flow resistance is small, the flow capacity is large, the Kv value is improved by 1.5 to 3 times compared with the conventional straight stroke type regulating valve, the sediment is not easy to form, the anti-blocking performance is good, and the sealing surface has the self-cleaning function;

2. the sealing grade of the regulating valve of the utility model can reach VI level or even zero leakage, the product can be suitable for any harsh working condition by changing the pattern of the throttling hole, and the bidirectional sealing can be realized;

3. the utility model adopts a pressure self-sealing structure under the high-pressure working condition, and avoids the leakage of the product;

4. the sealing element can adopt a soft sealing single valve core structure under the working condition of normal temperature and low pressure difference, so that the structure is simplified and zero leakage of the product can be ensured;

5. the sealing surfaces of the valve seat and the valve core are convenient to grind, no special grinding tool is needed to be matched and ground, and the interchangeability of parts is high;

6. the utility model discloses the governing valve can be done simultaneously and turn-offs and adjust the use, satisfies current user to the more and more high demand of governing valve sealing performance requirement.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only 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 creative efforts.

FIG. 1 is a schematic structural view of a regulating valve of the present invention;

FIG. 2 is a schematic structural view of the porous valve element of the present invention;

fig. 3 is a schematic structural diagram of the window-type valve core of the present invention.

In the figure: 1-valve body, 2-valve core, 3-valve seat, 4-elastic part, 5-valve core stop block, 6-valve core frame, 7-pin shaft, 8-valve rod, 9-valve cover, 10-sealing ring, 11-backing ring, 12-four-open ring, 13-actuating mechanism, 14-upright post, 15-scale plate, 16-indicating part, 21-left half valve core, 22-right half valve core and 23-adjusting port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In one embodiment of the present invention, as shown in fig. 1, specifically discloses a regulating valve, which comprises a valve body 1, a valve core 2, a valve seat 3, a valve rod 8, a valve cover 9 and an actuating mechanism 13,

a through flow passage is arranged in the valve body 1, the number of the valve seats 3 is two, the valve seats are respectively arranged at two sides of the through flow passage, the valve core 2 is arranged between the two valve seats 3, the lower end of the valve rod 8 is connected with the valve core 2, the upper end of the valve rod 8 is connected with the actuating mechanism 13,

the lower part of the valve core 2 is provided with an adjusting port 23 for adjusting flow, the valve core 2 is composed of a left half valve core 21 and a right half valve core 22, an elastic part 4 is arranged between the left half valve core 21 and the right half valve core 22, preferably, the elastic part 4 is a spring, the number of the elastic parts is a plurality, the number of the elastic parts is determined according to the sealing requirement of working condition design, and the elastic parts are sequentially and transversely arranged in the valve core 2 to play a role of pre-compression. The left half valve core 21 and the right half valve core 22 are symmetrically arranged, the left half valve core 21 and the right half valve core 22 are fixed through a valve core stop block 5, a valve core frame 6 is sleeved outside the valve core stop block 5, the valve core frame 6 is fixedly connected with the lower end of the valve rod 8, an inner threaded hole is formed in the upper end of the valve core frame 6, an outer thread is formed in the lower end of the valve rod 8, and after the outer thread of the valve rod 8 is screwed with the inner thread of the valve core frame 6, the valve rod is fixed through a matching pin shaft 7.

Valve gap 9 sets up the top cover of valve body 1 is established the outside of valve rod 8, valve gap 9 with be equipped with seal structure between the valve body 1, seal structure includes sealing washer 10, backing ring 11 and four ring opening 12, pressure is from tight sealing washer 10 and backing ring 11 and all sets up between valve gap 9 and the valve body 1, pressure is from tight sealing washer 10 sets up the below of backing ring 11, four ring opening 12 sets up the top of backing ring 11, one side of four ring opening 12 with valve gap 9 hugs closely, and the opposite side inlays the dress and is in valve body 1, preferably, sealing washer 10 is including the upper portion of pasting tight backing ring 11 and the lower part of pasting tight valve gap 9, the cross section on upper portion is square, and the cross section of lower part is right triangle.

The actuating mechanism 13 is connected with the valve body 1 through a stand column 14, a scale plate 15 is arranged on the stand column 14, and an indicating component 16 opposite to the scale plate 15 is arranged on the valve rod 8.

The utility model discloses an among the preferred mode, the utility model discloses the case bottom of governing valve is adjusted mouthful and is a plurality of aperture and a window (as shown in fig. 2), the window is semi-circular, a plurality of aperture sets up the top at semi-circular window, a plurality of aperture is arranged according to the mode layering that from the top down increases gradually.

In another preferred embodiment of the present invention, the adjusting opening at the bottom of the valve core of the adjusting valve of the present invention is a window (as shown in fig. 3), the lower portion of the window is semicircular, and the upper portion is hill-shaped.

The utility model discloses a working process does: after the regulating valve is installed in a system pipeline, the medium force pushes the valve core 2 to be attached to the sealing surface of the valve seat 3 to form sealing, the actuating mechanism 13 pulls the valve rod 8 to move up and down, the valve rod 8 drives the valve core 2 to move, the lower part of the valve core 2 is provided with a regulating port 23 for regulating the flow, and the quantity or the sectional area of the part of the regulating port 23 entering the valve seat 3 is correspondingly changed along with the different lifting heights of the valve core 2, so that the flow regulating purpose of the medium through the flow area of the valve core 2 is achieved; when the valve core 2 moves, the sealing surface of the valve core is always attached to the sealing surface of the valve seat 3 under the action of the spring, so that the self-cleaning function of the sealing surface is realized.

The regulating valve has the advantages of a shut-off valve, a straight stroke regulating valve and an angle type regulating valve, can be used as the regulating valve and the shut-off valve simultaneously, only one product needs to be installed when two valves are needed in an original system, and a large amount of capital construction funds can be saved for users.

The embodiment disclosed herein is merely a preferred embodiment, which should not be taken as limiting the scope of the invention, but is also included within the scope of the invention.

Claims

1. A regulating valve comprises a valve body (1), a valve core (2), valve seats (3), a valve rod (8), a valve cover (9) and an actuating mechanism (13), and is characterized in that a through flow passage is formed in the valve body, the number of the valve seats is two, the two valve seats are respectively arranged on two sides of the through flow passage, the valve core (2) is arranged between the two valve seats (3), the lower end of the valve rod (8) is connected with the valve core (2), the upper end of the valve rod (8) is connected with the actuating mechanism (13), the valve cover (9) is arranged at the top of the valve body (1) and sleeved on the outer side of the valve rod (8), and a sealing structure is arranged between the valve cover (9) and the valve body (1); the valve core (2) consists of a left half valve core (21) and a right half valve core (22), an elastic part (4) is arranged between the left half valve core and the right half valve core, and the bottom of the valve core (2) is provided with an adjusting port (23) for adjusting the flow.

2. The regulating valve according to claim 1, wherein the left half valve core (21) and the right half valve core (22) are symmetrically arranged, the left half valve core (21) and the right half valve core (22) are fixed through a valve core stop block (5), a valve core frame (6) is sleeved outside the valve core stop block (5), and the valve core frame (6) is fixedly connected with the lower end of the valve rod (8).

3. The regulating valve according to claim 2, wherein the upper end of the valve core frame (6) is fixed with the lower end of the valve rod (8) through a pin shaft (7) after being connected through threads.

4. A regulating valve according to claim 1, characterized in that the sealing structure comprises a sealing ring (10), a backing ring (11) and four open rings (12), the sealing ring (10) and the backing ring (11) are both arranged between the valve cover (9) and the valve body (1), the sealing ring (10) is arranged below the backing ring (11), the four open rings (12) are arranged above the backing ring (11), one side of the four open rings (12) is tightly attached to the valve cover (9), and the other side is embedded in the valve body (1).

5. A control valve according to claim 4, characterized in that the sealing ring (10) comprises an upper portion abutting against the grommet (11) and a lower portion abutting against the valve cover (9), the upper portion having a square cross-section and the lower portion having a right-angled triangle cross-section.

6. A regulating valve according to claim 2, characterized in that the regulating port (23) comprises several small holes and at least one window, the cross-sectional area of which is stepwise variable in the direction of movement of the spool.

7. A regulating valve according to claim 2, characterized in that the regulating opening (23) comprises several small holes or at least one window, the cross-sectional area of which is stepwise variable in the direction of movement of the spool.

8. A regulating valve according to claim 2, characterized in that the number of said elastic elements (4) is several, arranged in turn transversely inside said spool (2).

9. A regulating valve according to claim 1, characterized in that the actuator (13) is connected to the valve body (1) by means of a post (14), the post (14) being provided with a scale (15), and the valve stem (8) being provided with an indicating member (16) opposite to the scale (15).