CN217381725U - High tee valve bypass valve seat seal structure that adds - Google Patents

Abstract

The utility model relates to a high tee valve bypass disk seat seal structure that adds comprises valve body, graphite circle, clamping ring, dish spring and bypass disk seat. Set up graphite circle, clamping ring, dish spring between valve body and bypass disk seat, the dish spring provides the pretightning force and drives the clamping ring and compress tightly graphite circle, forms sealedly between valve body and bypass disk seat, keeps apart main road and bypass. The utility model discloses high tee valve bypass disk seat seal structure that adds adopts the graphite circle to seal, and the dish spring provides the sealed required pretightning force of graphite circle, and it is relatively lower to make the requirement, can use in high pressure, high temperature environment, and the suitability is stronger to reduce cost to a certain extent.

Description

High tee valve bypass valve seat seal structure that adds

Technical Field

The utility model relates to a high tee valve bypass disk seat seal structure that adds belongs to the valve that the thermoelectricity field used.

Background

The high pressure heater three-way valve is arranged on an inlet pipeline of a high pressure heater of a thermal power generating unit and is important equipment for protecting the safe operation of the high pressure heater. When the unit normally operates, high-pressure feed water enters the high-pressure heater through the inlet three-way valve and enters the boiler through the outlet three-way valve. When the high-pressure heater breaks down, the high-pressure three-way valve is required to quickly close the main path and open the bypass, so that the high-pressure heater is cracked, and feed water bypasses the high-pressure heater and enters the boiler through the bypass.

At present, the parameters of the thermal power generating unit are higher and higher, and the high feed water temperature of the ultra-supercritical thermal power generating unit exceeds 300 ℃; the existing bypass seal of the high-pressure three-way valve mostly adopts a spring energy storage ring and a rubber ring, and all the used materials are non-metallic materials, so that the long-term operation under the working condition of over 310 ℃ cannot be met.

SUMMERY OF THE UTILITY MODEL

For solving the technical defect who exists, the utility model provides an adopt flexible graphite circle sealed high tee valve bypass disk seat seal structure that adds.

The utility model discloses the content:

an object of the utility model is to provide a high tee valve bypass valve seat seal structure that adds to solve current high tee valve bypass valve seat seal and can not be in the problem of the long-term operation under the operating mode that surpasss 300 ℃.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a high tee valve bypass disk seat seal structure, comprises valve body (1), graphite circle (3), clamping ring (4), dish spring (5) and bypass disk seat (2). Set up graphite circle, clamping ring, dish spring between valve body and bypass disk seat, the dish spring provides the pretightning force and drives the clamping ring and compress tightly graphite circle, forms sealedly between valve body and bypass disk seat, keeps apart and makes main road and bypass.

According to the sealing structure of the bypass valve seat of the high pressure three-way valve, the graphite ring is used for sealing between the valve body and the bypass valve seat.

According to the high-pressure three-way valve bypass valve seat sealing structure, the pretightening force of the valve seat graphite ring is provided by the disc spring.

The utility model has the advantages that: the high pressure three-way valve bypass valve seat seal of the utility model adopts the graphite ring, the disc spring provides pretightening force to drive the compression ring to compress the graphite ring, and a seal is formed between the valve body and the bypass valve seat; the existing high pressure three-way valve bypass valve seat sealing structure uses a spring energy storage ring and a rubber ring for sealing, because the sealing element is a chemical product, the sealing element is easy to age under a high-temperature working condition, can not be used when the temperature exceeds 310 ℃, and has high purchase cost; the utility model discloses a graphite circle is high temperature resistant and sealing performance is better, and low in manufacturing cost, simple installation, has improved the life-span of part, has saved the cost of maintenance change.

Drawings

FIG. 1 is a high pressure three-way valve employing the bypass valve seat seal of FIG. 2;

FIG. 2 is a schematic view of a bypass valve seat seal;

in the figure, 1-valve body, 2-bypass valve seat, 3-graphite ring, 4-press ring and 5-disc spring

Detailed Description

In order to make the objects, solutions and advantages of the present invention more apparent, the present invention will be described with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary, and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The utility model discloses a concrete implementation as follows:

the utility model provides a high tee valve bypass disk seat seal structure, as shown in fig. 1, 2, valve body (1), bypass disk seat (2), graphite circle (3), clamping ring (4) and dish spring (5), set up graphite circle (3), clamping ring (4), dish spring (5) between valve body and bypass disk seat, dish spring (5) provide pretightning force drive clamping ring (4) and compress tightly graphite circle (3), form between valve body (1) and bypass disk seat (2) and seal, keep apart and make main road and bypass.

In the embodiment, one end of the disc spring (5) is arranged at the position limited by the bypass step of the valve body (1), and the other end of the disc spring is connected with the pressing ring (4).

In the embodiment, the pressing ring (4) is positioned between the disc spring (5) and the graphite ring (3).

In the embodiment, the graphite ring (3) is positioned between the valve body (1) and the bypass valve seat (2), the end part of the graphite ring is provided with a pressing mechanism for axially pressing the graphite ring (3), and the pressing mechanism comprises a disc spring (5) and a pressing ring (4).

In this embodiment, the disc spring (5) may be one, or may be one or more groups.

This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.

Claims (3)

1. A high pressure heater three-way valve bypass valve seat sealing structure is characterized by comprising a valve body, a graphite ring, a pressure ring, a disc spring and a bypass valve seat; set up graphite circle, clamping ring, dish spring between valve body and bypass disk seat, the dish spring provides the pretightning force and drives the clamping ring and compress tightly graphite circle, forms sealedly between valve body and bypass disk seat, keeps apart and makes main road and bypass.

2. The high pressure three-way valve bypass valve seat seal structure of claim 1, wherein: the graphite ring is used for sealing between the valve body and the bypass valve seat.

3. The high pressure three-way valve bypass valve seat seal structure of claim 1, wherein: the pretightening force of the graphite ring is provided by a disc spring.

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