Ball valve suitable for coal water slurry conveying pipeline

Abstract

The utility model relates to the technical field of ball valves, in particular to a ball valve suitable for a coal water slurry conveying pipeline, which comprises a valve body, a valve seat and a ball body, the valve body is connected with a cleaning mechanism used for softening and cleaning coal water slurry sediments, a through hole is correspondingly arranged on the valve body, and the cleaning mechanism penetrates through the through hole on the valve body to be communicated with an inner cavity of the valve body. The cleaning mechanism comprises a cleaning valve, the outlet end of the cleaning valve communicates with the inner cavity of the valve body through a liquid conveying pipe, and the inlet end of the cleaning valve is detachably connected with a blocking piece. The ball valve body is externally connected with the cleaning valve, a dispersing agent used for softening coal water slurry sediments is added into the valve through the cleaning valve, the coal water slurry sediments attached to the inner wall of the valve are softened, and a ball valve channel can be normally opened and closed for use after softening and washing. The situation of valve inner leakage caused by forcible opening and closing of the ball valve is avoided, and the service life of the ball valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a ball valve suitable for a water-coal slurry conveying pipeline. Background Art

[0002] As a new, efficient, clean, pipeline-transportable coal-based fuel, water-coal slurry is a mixture of 65% to 70% coal with different particle size distributions, about 29% to 34% water and about 1% chemical additives. It has the characteristics of high combustion efficiency and low pollutant emissions. It can be used to replace oil, gas and coal in power station boilers, industrial boilers and industrial kilns, as well as for heating and domestic hot water in various buildings such as hotels, residences, hotels and office buildings.

[0003] Nowadays, most of the water-coal slurry factories choose to install ball valves on the water-coal slurry conveying pipeline to control the conveying status of the water-coal slurry. However, when the ball valve is closed for a long time, the water-coal slurry will solidify after settling in the valve, and adhere to the inner wall of the valve to form a wall hanging, causing the valve to become blocked and fail, and the water-coal slurry cannot be conveyed normally, resulting in production accidents. In addition, these water-coal slurry deposits have a certain hardness and may adhere to the ball of the ball valve, causing the ball valve to be unable to open and close normally. At this time, if the ball valve is forcibly opened and closed, it is easy to cause the ball valve stem to deform, and then cause internal leakage of the valve. Utility Model Content

[0004] The utility model aims to provide a ball valve suitable for a water-coal slurry conveying pipeline in view of the deficiencies in the prior art, and solves the problem in the prior art that when the ball valve is closed for a long time, the water-coal slurry will be deposited in the valve and adhere to the inner wall of the valve to form a hanging wall, causing the valve to become blocked and fail, making it impossible to convey the water-coal slurry normally and causing a production accident. In addition, the water-coal slurry deposits may adhere to the ball of the ball valve, causing the ball valve to be unable to open and close normally.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A ball valve suitable for a water-coal slurry conveying pipeline comprises a valve body, a valve seat and a ball body. The valve body is connected to a cleaning mechanism for softening and cleaning water-coal slurry deposits. A through hole is correspondingly opened on the valve body. The cleaning mechanism passes through the through hole on the valve body and is connected to the inner cavity of the valve body.

[0007] Furthermore, the cleaning mechanism comprises a cleaning valve, an outlet end of the cleaning valve is connected to the inner cavity of the valve body through an infusion tube, and an inlet end of the cleaning valve is detachably connected to a blocking member.

[0008] Furthermore, the cleaning valve is a manual ball valve, and the blocking member is a flange blind plate.

[0009] Furthermore, a disc spring is provided between the valve body and the valve seat, a first sealing ring and a second sealing ring are provided on both axial sides of the disc spring respectively, and a retaining ring is provided between the first sealing ring and the disc spring.

[0010] Furthermore, the first sealing ring and the second sealing ring are wedge-shaped structures.

[0011] Furthermore, the first sealing ring and the second sealing ring are made of graphite.

[0012] Furthermore, the first sealing ring and the second sealing ring are respectively welded with a corrosion-resistant layer on the contact surface with the valve body.

[0013] Furthermore, the valve seat is provided with a scraper on the contact surface with the sphere for scraping off the medium attached to the sphere.

[0014] Furthermore, the surface of the sphere is provided with a hardening coating.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model has a cleaning valve externally connected to the ball valve body, and a dispersant for softening water-coal slurry sediments is added into the valve through the cleaning valve, so as to soften the water-coal slurry sediments attached to the inner wall of the valve. After softening and flushing, the water-coal slurry medium can be normally transported in the pipeline, thus avoiding the occurrence of production accidents and also avoiding the situation of internal leakage of the valve due to forced opening and closing of the ball valve, thereby extending the service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of a ball valve suitable for a water-coal slurry delivery pipeline provided by the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0019] Wherein, the accompanying drawings are marked as follows:

[0020] 1. Valve body; 2. Valve seat; 3. Ball; 4. Cleaning valve; 5. Sealing piece; 6. Disc spring; 7. Second sealing ring; 8. Retaining ring; 9. First sealing ring; 10. Corrosion-resistant layer; 11. Scraper. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0025] For easier understanding, see Figure 1 to Figure 2 The present embodiment provides a ball valve suitable for a water-coal slurry delivery pipeline, comprising a valve body 1, a valve seat 2 and a ball 3. A through hole is provided on the outer side of the valve body 1 near the valve seat 2. A cleaning valve 4 connected to the outer side above the valve body 1 is connected to the inner cavity of the valve body 1 after a liquid delivery tube passes through the through hole. A plugging member 5 is detachably connected to the inlet end of the cleaning valve 4. The cleaning valve 4 is preferably a manual ball valve, and the plugging member 5 is preferably a flange blind plate. When it is necessary to soften and clean the water-coal slurry deposits in the inner cavity of the valve body 1, first remove the sealing member 5 at the inlet end of the cleaning valve 4, and connect the dispersant to the inlet end of the cleaning valve 4. Then, open the switch of the cleaning valve 4, and the dispersant flows into the inner cavity of the valve body 1 along the infusion tube and contacts with the water-coal slurry deposits, so that the water-coal slurry deposits are dissolved and softened. After the water-coal slurry deposits are completely softened, connect the circulating water to the inlet end of the cleaning valve 4 to flush the inner cavity of the valve body 1. After the flushing is completed, the ball valve can be restored to normal use. After the softening and cleaning is completed, close the cleaning valve 4, and seal the inlet end of the cleaning valve 4 with the sealing member 5.

[0026] For easier understanding, see Figure 2 , a disc spring 6 is provided between the valve body 1 and the valve seat 2, and the valve seat 2 is pushed by the compression pre-tightening force of the disc spring 6, ensuring that the valve seat 2 and the ball 3 can fit tightly to form a seal. A second sealing ring 7 is provided between the outer circumference of the valve seat 2 and the valve body 1, and the inner ring end of the disc spring 6 abuts against one side of the retaining ring 8, and the other side of the retaining ring 8 abuts against the first sealing ring 9. The retaining ring 8 can transfer the force exerted on the disc spring 6 to the first sealing ring 9 and press the first sealing ring 9 to further ensure the sealing of the ball valve. The first sealing ring 9 and the second sealing ring 7 are respectively located on both sides of the axial direction of the disc spring 6, and work together to prevent the medium from entering the installation cavity of the disc spring 6. While meeting the sealing performance, it can prevent the medium from entering the installation cavity of the disc spring 6 and causing the disc spring 6 to fail. The first sealing ring 9 and the second sealing ring 7 are both wedge-shaped structures, that is, conical sealing rings with a certain taper. Compared with the sealing ring with a planar structure, the sealing ring with a wedge structure is more tightly combined with the installation groove, the sealing effect is more reliable, and the service life is longer. The material of the first sealing ring 9 and the second sealing ring 7 is preferably graphite, which has good sealing performance and high temperature resistance, corrosion resistance and other characteristics, and can meet the sealing requirements of the ball valve under various working conditions to ensure the normal operation of the ball valve. The first sealing ring 9 and the second sealing ring 7 are respectively welded on the contact surface with the valve body 1 with a corrosion-resistant layer 10 to avoid sealing failure on this side due to corrosion and rust of the valve body 1. The corrosion-resistant layer 10 is preferably 316L stainless steel.

[0027] For easier understanding, please continue to refer to Figure 2 The valve seat 2 is provided with a raised scraper 11 on the contact surface with the ball 3. When the ball valve is turned on and off, the ball 3 will rotate in the horizontal direction. During the rotation of the ball 3, it will contact the scraper 11 in the valve seat 2. The scraper 11 will scrape the medium attached to the surface of the ball 3 to prevent the medium from entering between the ball 3 and the valve seat 2 as the ball 3 rotates and destroying the sealing, further ensuring the overall sealing of the ball valve. In order to prevent leakage due to erosion and wear by the medium, the surface layer of the ball 3 is provided with a hardened coating.

[0028] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any person skilled in the art may make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and the changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A ball valve suitable for a water-coal slurry conveying pipeline, comprising a valve body (1), a valve seat (2) and a ball (3), characterized in that: The valve body (1) is connected to a cleaning mechanism for softening and cleaning water-coal slurry sediments, and a through hole is correspondingly opened on the valve body (1). The cleaning mechanism passes through the through hole on the valve body (1) and is connected to the inner cavity of the valve body (1).

2. The ball valve suitable for water-coal slurry conveying pipeline according to claim 1 is characterized in that: The cleaning mechanism comprises a cleaning valve (4), the outlet end of the cleaning valve (4) being connected to the inner cavity of the valve body (1) via a liquid infusion tube, and the inlet end of the cleaning valve (4) being detachably connected to a blocking member (5) for blocking the inlet end of the cleaning valve (4).

3. The ball valve suitable for water-coal slurry conveying pipeline according to claim 2 is characterized in that: The cleaning valve (4) is a manual ball valve, and the blocking member (5) is a flange blind plate.

4. The ball valve suitable for water-coal slurry conveying pipeline according to claim 1 is characterized in that: A disc spring (6) is provided between the valve body (1) and the valve seat (2), a first sealing ring (9) and a second sealing ring (7) are provided on both axial sides of the disc spring (6), and a retaining ring (8) is provided between the first sealing ring (9) and the disc spring (6).

5. The ball valve suitable for water-coal slurry conveying pipeline according to claim 4 is characterized in that: The first sealing ring (9) and the second sealing ring (7) are wedge-shaped structures.

6. The ball valve suitable for water-coal slurry conveying pipeline according to claim 5, characterized in that: The first sealing ring (9) and the second sealing ring (7) are made of graphite.

7. The ball valve suitable for water-coal slurry conveying pipeline according to claim 6 is characterized in that: The first sealing ring (9) and the second sealing ring (7) are respectively built-up with corrosion-resistant layers (10) on their contact surfaces with the valve body (1).

8. The ball valve suitable for coal water slurry transportation pipeline according to claim 1, characterized in that: The valve seat (2) is provided with a scraper (11) on the contact surface with the ball (3) for scraping off the medium attached to the ball (3).

9. The ball valve suitable for water-coal slurry conveying pipeline according to claim 1, characterized in that: The surface of the sphere (3) is provided with a hardened coating.

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