CN215172513U

CN215172513U - Check valve for descending pipeline

Info

Publication number: CN215172513U
Application number: CN202121603415.XU
Authority: CN
Inventors: 孙强; 张洁; 高利利
Original assignee: NANTONG POWER STATION VALVE CO Ltd
Current assignee: NANTONG POWER STATION VALVE CO Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-12-14
Anticipated expiration: 2031-07-15

Abstract

The utility model relates to a valve body technical field specifically discloses a check valve for descending pipe way, and the check valve sets up on vertical pipeline, including the valve body, the disk seat, a supporting seat, the uide bushing, valve clack and valve gap, the upper portion of valve body is the feedwater entry, and the lower part is the feedwater export, and one side is the detection mouth, and the fixed valve port department that sets up at the feedwater entry of disk seat, the fixed setting in the feedwater exit in bottom of supporting seat, the uide bushing setting is in the supporting seat, is equipped with a plurality of medium hole on the inclined plane of supporting seat, the upper portion and the disk seat laminating of valve clack, wear to establish in the uide bushing in the lower part of valve clack, and the valve clack is equipped with reset spring with the outside of supporting seat. The upper part of the valve body in the check valve is a water supply inlet, and the lower part of the valve body is a water supply outlet, so that the problem that the check valve cannot meet the use requirement of a medium from top to bottom is solved; the left side of the valve body is provided with the detection port, so that the valve does not need to be detached from the pipeline for maintenance when being maintained, and the maintenance cost is reduced.

Description

Check valve for descending pipeline

Technical Field

The utility model belongs to the technical field of the valve body, specifically a check valve for descending conduit.

Background

The check valve is suitable for steam-water medium pipelines and pipelines which only allow media to flow in one direction, such as medium pipelines of petroleum, chemical industry, metallurgy and the like. The valve is automatically opened or closed by the pressure of the flowing medium in the pipeline, and the medium is blocked by the valve clack when flowing back to play a role in preventing backflow. The high-temperature high-pressure large-caliber check valve usually adopts a swing structure, and a valve clack of the valve is rotated to open under the action of a medium and closed under the action of the self weight of the valve clack;

the swing check valve has the advantages of high working condition parameters, small flow resistance and the like, but the structure is only suitable for a horizontal pipeline or a vertical pipeline in which a medium flows from bottom to top, and the pipeline medium of a descending medium flows from top to bottom, so that the conventional check valve cannot be used;

with the progress of modern thermal power generation technology, an ultra-supercritical unit is a relatively common unit, in order to optimize the field layout design of the unit, a water supply pipeline is designed to flow from top to bottom, a check valve for preventing backflow of water supply needs to be installed at the outlet of a water supply pump, the valve at the position is in a high-temperature and high-pressure working condition, the nominal pressure is generally more than or equal to CLASS2500, and the nominal pipe diameter is generally more than or equal to NPS 16. The method has the characteristics of high working condition parameters, large size, butt welding end connection and the like.

In view of this, there is a need to invent a check valve for a descent duct.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a check valve for descending pipeline has solved the above-mentioned problem that proposes.

In order to solve the above technical problems, the utility model provides a check valve for a descending pipeline, the check valve is arranged on the vertical pipeline and comprises a valve body, a valve seat, a supporting seat, a guide sleeve, a valve clack and a valve cover, the upper part of the valve body is a water supply inlet, the lower part of the valve body is a water supply outlet, one side of the valve body is a detection port, the valve seat is fixedly arranged at a valve port of the water supply inlet, the bottom of the supporting seat is fixedly arranged at the water supply outlet, the guide sleeve is arranged in the supporting seat, the inclined plane of the supporting seat is provided with a plurality of medium holes, the upper part of the valve clack is jointed with the valve seat, the lower part of the valve clack is arranged in the guide sleeve in a penetrating way, the outer sides of the valve clack and the support seat are provided with return springs, the outer side of the supporting seat is provided with an adjusting nut which is positioned at the lower part of the reset spring, and the valve cover is arranged at the detection port.

Further, the valve gap includes outer valve gap and interior valve gap, outer valve gap with be equipped with the sealing washer between the interior valve gap, pass through the bolt fastening between outer valve gap and the interior valve gap, and the middle part is equipped with rings.

Furthermore, the valve seat and the inner wall of the valve body are welded and fixed.

Further, the inner side of the supporting seat and the outer side of the guide sleeve are fixed through threads.

The utility model has the advantages that the upper part of the valve body in the check valve is a water supply inlet, and the lower part is a water supply outlet, thereby solving the problem that the check valve can not meet the use requirement of a medium from top to bottom; one side of the valve body is provided with a detection port, so that the valve does not need to be detached from the pipeline for maintenance when the valve is maintained, and the maintenance cost is reduced; when the reset spring makes the medium return, the valve clack can be reset, and the valve port can be closed.

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 cross-sectional view of a check valve for a descent conduit;

in the figure: 1-valve body, 2-valve seat, 3-support seat, 4-guide sleeve, 5-valve flap, 6-valve cover, 7-water inlet, 8-water outlet, 9-detection port, 10-medium hole, 11-reset spring, 12-adjusting nut, 61-outer valve cover, 62-inner valve cover, 63-sealing ring and 64-hanging ring.

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 a specific embodiment of the present invention, as shown in fig. 1, a check valve for a descending pipeline is specifically disclosed, which comprises a check valve for a descending pipeline, the check valve is disposed on a vertical pipeline, and comprises a valve body 1, a valve seat 2, a supporting seat 3, a guiding sleeve 4, a valve flap 5 and a valve cover 6, the upper portion of the valve body 1 is a water supply inlet 7, and the lower portion is a water supply outlet 8, so that the problem that the check valve cannot meet the use requirement of a medium of the descending pipeline from top to bottom is solved; one side is a detection port 9, so that the valve does not need to be detached from the pipeline for maintenance when the valve is maintained, and the maintenance cost is reduced; the valve seat 2 is fixedly arranged at a valve port of a water supply inlet 7, the valve seat 2 and the inner wall of the valve body 1 are welded and fixed, the bottom of the supporting seat 3 is fixedly arranged at a water supply outlet 8, the guide sleeve 4 is arranged in the supporting seat 3, the inner side of the supporting seat 3 and the outer side of the guide sleeve 4 are fixed through threads, a plurality of medium holes 7 are formed in the inclined surface of the supporting seat 3, the upper part of the valve clack 5 is attached to the valve seat 2, the lower part of the valve clack 5 is arranged in the guide sleeve 4 in a penetrating mode, and the outer sides of the valve clack 5 and the supporting seat 3 are provided with a return spring 8 so that the valve clack can be reset when a medium flows back and the valve port is closed; an adjusting nut 9 is arranged on the outer side of the supporting seat 3, the adjusting nut 9 is positioned at the lower part of the return spring 8, and the adjusting nut 9 can be used for adjusting the compression amount of the return spring 8; the valve cover 6 is arranged at the detection port 9, the valve cover 6 comprises an outer valve cover 61 and an inner valve cover 62, a sealing plate 63 is arranged between the outer valve cover 61 and the inner valve cover 62, the outer valve cover 61 and the inner valve cover 62 are fixed through bolts, and a hanging ring 64 is arranged in the middle of the outer valve cover 61 and the inner valve cover 62.

The utility model discloses a work flow: the medium enters the feed water inlet 7 from the descending pipeline; the valve clack 5 is flushed by the impulsive force of the medium, and then the medium flows through the medium hole 7 and the water supply outlet 8 from the water supply inlet 7 in sequence; the medium flows back, and the impact force of the backflow resets the return spring 8, so that the valve clack 5 is attached to the valve seat 2, the valve port between the valve clack 5 and the valve seat 2 is closed, and the backflow of the medium is effectively blocked. When the valve body is broken down, the valve does not need to be detached from the descending pipeline, and the interior of the valve body can be overhauled only by opening the outer valve cover 61 and the inner valve cover 62 at the detection port.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.

Claims

1. The check valve for the descending pipeline is characterized by being arranged on a vertical pipeline and comprising a valve body (1), a valve seat (2), a supporting seat (3), a guide sleeve (4), a valve clack (5) and a valve cover (6), wherein the upper portion of the valve body (1) is a water supply inlet (7), the lower portion of the valve body is a water supply outlet (8), one side of the valve body is a detection port (9), the valve seat (2) is fixedly arranged at the valve port of the water supply inlet (7), the bottom of the supporting seat (3) is fixedly arranged at the water supply outlet (8), the guide sleeve (4) is arranged in the supporting seat (3), a plurality of medium holes (10) are formed in the inclined plane of the supporting seat (3), the upper portion of the valve clack (5) is attached to the valve seat (2), and the lower portion of the valve clack (5) is arranged in the guide sleeve (4) in a penetrating manner, valve clack (5) with the outside of supporting seat (3) is equipped with reset spring (11), the outside of supporting seat (3) is equipped with adjusting nut (12), adjusting nut (12) are located the lower part of reset spring (11), valve gap (6) set up detect mouthful (9) department.

2. The non-return valve for a descending pipe according to claim 1, wherein the valve cover (6) comprises an outer valve cover (61) and an inner valve cover (62), a sealing ring (63) is arranged between the outer valve cover (61) and the inner valve cover (62), the outer valve cover (61) and the inner valve cover (62) are fixed through bolts, and a hanging ring (64) is arranged in the middle.

3. Non-return valve for a descent pipe according to claim 1, characterised in that the valve seat (2) is welded to the inner wall of the valve body (1).

4. Non-return valve for a descending pipe according to claim 1, characterised in that the inner side of the support seat (3) is screwed to the outer side of the guide sleeve (4).