CN203421182U

CN203421182U - Multistage depressurization adjusting valve

Info

Publication number: CN203421182U
Application number: CN201320538871.XU
Authority: CN
Inventors: 陈志滔
Original assignee: ZHEJIANG JINFENG AUTOMATION METER CO Ltd
Current assignee: ZHEJIANG JINFENG AUTOMATION METER CO Ltd
Priority date: 2013-09-02
Filing date: 2013-09-02
Publication date: 2014-02-05
Anticipated expiration: 2023-09-02

Abstract

A multi-stage pressure-reducing regulating valve is disclosed. This valve primarily addresses the problem of flashing and cavitation in existing regulating valves under high pressure differential conditions, which causes cavitation damage. Its features include: a cup-shaped valve seat (3); several pressure-reducing holes (7) on the valve seat (3) and lower sleeve (6); and several adjusting holes (8) at the lower part of the valve core (4) that are compatible with the pressure-reducing holes (7). This multi-stage pressure-reducing regulating valve, by employing multiple sleeve valve assemblies with pressure-reducing holes, increases fluid damping, thereby reducing the valve's flow rate, improving the overall performance of the equipment, extending the valve's service life, reducing noise, and enabling long-term stable operation.

Description

Multilevel decompression modulating valve

Technical field

The utility model relates to a kind of valve, is specifically related to a kind of multilevel decompression modulating valve.

Background technique

Valve is the controlling component in fluid delivery system, has water conservancy diversion, dams, adjusting, throttling, prevents the functions such as refluence, shunting or overflow pressure relief.Present modulating valve is because inner parts structure is more single, in the operating mode of High Pressure Difference, and because the pressure reduction of medium is larger, the too fast phenomenon that there will be flash distillation, cavitation of valve flow velocity, when causing valve working, noise is larger, affects working environment.Simultaneously due to the appearance of flash distillation cavitation phenomenon, cause fluid to seriously the washing away of trim, valve is caused to Cavitation.

Model utility content

In order to overcome the deficiency of background technique, the utility model provides a kind of multilevel decompression modulating valve, has mainly solved existing modulating valve in the operating mode of High Pressure Difference, occurs flash distillation and cavitation phenomenon, valve is caused to the problem of Cavitation.

The technological scheme that the utility model adopts is: a kind of multilevel decompression modulating valve, comprise valve body, valve rod, valve seat, on described valve rod, be connected with spool, described valve body is provided with competing upper bush, lower sleeve, described valve seat is cup-shaped, described valve seat, lower sleeve are provided with some decompression holes, and described spool bottom is provided with the some adjustment holes with decompression hole adaptation.

Described decompression hole is located at bottom and the side of valve seat.

Between described upper bush, lower sleeve, be provided with accumulation of energy seal ring, described spool has the primary importance and the second place separated with accumulation of energy seal ring of extruding accumulation of energy seal ring.

On described upper bush, be extended with the first projection, be extended with the second projection on described lower sleeve, the first described projection and the second projection complement each other to form the groove with accumulation of energy seal ring adaptation.Described spool is provided with equalizing orifice.

Between described valve seat and valve body, be provided with gasket seal.

Described accumulation of energy seal ring includes ring body, and described ring body is enclosed with counterbalance spring, and described ring body consists of teflon.

The beneficial effects of the utility model are: adopt a plurality of telescoping valve groups that are provided with decompression hole, increase fluid damping, thereby reduce the flow velocity of valve, improved equipment overall performance, valve long service life, noise is little, can long-term stable operation.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the enlarged view at Figure 1A place.

1-valve body in figure, 2-valve rod, 3-valve seat, 4-spool, 41-equalizing orifice, 5-upper bush, 51-the first projection, 6-lower sleeve, 61-the second projection, 7-decompression hole, 8-adjustment hole, 9-accumulation of energy seal ring, 91-ring body, 92-counterbalance spring, 10-groove, 11-gasket seal.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1 with Figure 2, a kind of multilevel decompression modulating valve, comprise valve body 1, valve rod 2, valve seat 3, on described valve rod 2, be connected with spool 4, described valve body 1 is provided with competing upper bush 5, lower sleeve 6, described valve seat 3 is cup-shaped, and described valve seat 3, lower sleeve 6 are provided with some decompression holes 7, and described spool 4 bottoms are provided with the some adjustment holes 8 with decompression hole 7 adaptations.Suitably control spool 4 positions, can pass through flow and the flow velocity of adjustment hole 8 control medias.

Described decompression hole 7 is located at bottom and the side of valve seat 3.On the valve seat 3 of cup-shaped, offer decompression hole 7, increase fluid damping.

Between described upper bush 5, lower sleeve 6, be provided with accumulation of energy seal ring 9, described spool 4 has the primary importance and the second place separated with accumulation of energy seal ring 9 of extruding accumulation of energy seal ring 9.Spool 4 is under valve rod 2 drives, and extruding accumulation of energy seal ring 9, forms sealing.

On described upper bush 5, be extended with the first projection 51, be extended with the second projection 61 on described lower sleeve 6, the first described projection 51 and the second projection 61 complement each other to form the groove 10 with accumulation of energy seal ring 9 adaptations.Compact structure, good airproof performance.Described spool 4 is provided with equalizing orifice 41.Balance valve core 4 pressure at both sides, improve valve sensitivity, and valve responds is fast.

Between described valve seat 3 and valve body 1, be provided with gasket seal 11.Improve mechanism's sealing.

Described accumulation of energy seal ring 9 includes ring body 91, and described ring body 91 is enclosed with counterbalance spring 92, and described ring body 91 consists of teflon.After ring body 91 wearing and tearing or elastic force decline, counterbalance spring 92 starts that supporting comes realizes sealing compensation, has improved the working life of mechanism.

The concrete use of the utility model is as follows: during valve opening, valve body 1 inside is provided with upper bush 5 and the lower sleeve 6 that surface distributed has decompression hole 7, fluid flow damping due to medium when through sleeve and spool 4 increases, play slow hypotensive effect, medium can not produce bubble cavitation valve, the impact noise while yet reducing fluid through valve simultaneously; Spool 4, under valve rod 2 drives, pushes counterbalance spring 92, enters the medium of equalizing orifice 41, cannot be by the sealing surface between spool 4 and upper bush 5; The coated counterbalance spring 92 of ring body 91, counterbalance spring 92 is interference fit with groove 10.After seal ring work a period of time, due to reasons such as wearing and tearing, extruding, distortion, size can change to some extent, and now counterbalance spring 92 starts to support to come and realizes sealing compensation, the sealing of compensation can guarantee that Sealing works on, and realizes the function of permanent stabilized seal.

The beneficial effect of model utility is: adopt a plurality of telescoping valve groups that are provided with decompression hole, increase fluid damping, thereby reduce the flow velocity of valve, improved equipment overall performance, valve long service life, noise is little, can long-term stable operation.

Claims

1. A multi-stage pressure-reducing regulating valve, including a valve body (1), a valve stem (2), and a valve seat (3), the valve stem (2) is connected with a valve core (4), and the valve stem (2) is connected to the valve core (4). The valve body (1) is provided with an upper sleeve (5) and a lower sleeve (6) which are in conflict with each other, and is characterized in that: the valve seat (3) is cup-shaped, and the valve seat (3), The lower sleeve (6) is provided with a number of pressure-reducing holes (7), and the lower part of the valve core (4) is provided with a number of adjusting holes (8) adapted to the pressure-reducing holes (7).

2. The multi-stage pressure-reducing regulating valve according to claim 1, characterized in that: the pressure-reducing hole (7) is provided on the bottom and side of the valve seat (3).

3. The multi-stage pressure-reducing regulating valve according to claim 1, characterized in that: an energy storage sealing ring (9) is provided between the upper sleeve (5) and the lower sleeve (6), and the The spool (4) has a first position for squeezing the energy storage sealing ring (9) and a second position for separating from the energy storage sealing ring (9).

4. The multi-stage pressure-reducing regulating valve according to claim 3, characterized in that: a first bump (51) extends on the upper sleeve (5), and a first protrusion (51) extends on the lower sleeve (6). A second protrusion (61) is extended, and the first protrusion (51) and the second protrusion (61) cooperate with each other to form a groove (10) adapted to the energy storage sealing ring (9).

5. The multi-stage pressure-reducing regulating valve according to claim 1, characterized in that: the valve core (4) is provided with a balance hole (41).

6. The multi-stage pressure-reducing regulating valve according to claim 1, characterized in that: a sealing gasket (11) is provided between the valve seat (3) and the valve body (1).

7. The multi-stage pressure-reducing regulating valve according to claim 1, characterized in that: the energy storage sealing ring (9) includes a ring body (91), and the ring body (91) is wrapped with a compensation spring (92), the ring body (91) is made of polytetrafluoroethylene.