Anti-scouring wear-resistant ball valve

Abstract

The utility model discloses an anti-scour wear-resistant ball valve, and aims to provide an anti-scour wear-resistant ball valve which is simple in structure, reasonable in design and capable of effectively avoiding scrapping caused by scour, the anti-scour wear-resistant ball valve comprises a valve body, a valve cover, a valve rod and a valve ball, the valve ball is arranged between the valve body and the valve cover, one end of the valve rod is matched with the valve ball, and the other end of the valve rod is matched with the valve cover. The valve cover comprises an inlet valve cover and an outlet valve cover which are arranged on the two sides of the valve body respectively, an inlet flow guide pipe is arranged on the inner side of the inlet valve cover, an outlet flow guide pipe is arranged on the inner side of the outlet valve cover, and a valve cover clamping table for clamping the inlet flow guide pipe is arranged on the inlet valve cover; the valve body is provided with a valve body clamping groove allowing the outlet flow guide pipe to be connected in a clamping mode, and the inlet flow guide pipe is further provided with an end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to an anti-scouring and wear-resistant ball valve. Background Art

[0002] Ball valve: A valve in which the ball is driven by the valve stem and rotates around the axis of the ball valve. Ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other industries, and they play an important role in the national economy.

[0003] Ball valves are also widely used in the silicon chemical industry. Due to the fast flow rate of silicon powder particles, the service life of traditional hard-sealed ball valves is between 1 and 2 months, and no more than 3 months in situations with low frequency of use. The main reason for valve leakage is that the flow channel holes at the inlet and outlet of the valve are severely eroded and worn, causing perforation of the shell and external leakage. Ultimately, the entire valve has to be scrapped, which invisibly increases the factory's production costs. Therefore, further optimization is needed on the traditional ball valve. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an anti-scouring and wear-resistant ball valve which has a simple structure, a reasonable design and can effectively avoid being scrapped due to scouring.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An anti-scour and wear-resistant ball valve comprises a valve body, a valve cover, a valve stem and a valve ball, wherein the valve ball is placed between the valve body and the valve cover, one end of the valve stem is fitted on the valve ball, the valve cover comprises an inlet valve cover and an outlet valve cover respectively arranged on both sides of the valve body, an inlet guide pipe is arranged on the inner side of the inlet valve cover, an outlet guide pipe is arranged on the inner side of the outlet valve cover, a valve cover clamping platform for clamping the inlet guide pipe is arranged on the inlet valve cover, a valve body clamping groove for clamping the outlet guide pipe is arranged on the valve body, and an end cover is also arranged on the inlet guide pipe.

[0007] Preferably, the inlet guide tube and the outlet guide tube are both made of silicon carbide material.

[0008] Preferably, a valve seat assembly is provided between the inlet valve cover and the valve ball, and the valve seat assembly includes a compression spring, a sealing valve seat abutting on the valve ball, and a sealing base abutting on the sealing valve seat, one end of the compression spring is connected to the inlet valve cover, and the other end is fitted in the sealing base.

[0009] Preferably, a graphite sealing ring is provided between the sealing base and the sealing valve seat.

[0010] Preferably, an upper cover is arranged on the top of the valve body, and a lower cover is arranged on the bottom thereof, and sealing gaskets are arranged between the upper cover and the lower cover and the valve body respectively.

[0011] Preferably, at least two packing groups are arranged between the valve stem and the upper cover, and the packing groups are matched with packing glands, and the packing glands are fixedly connected to the upper cover.

[0012] Preferably, the inlet valve cover and the outlet valve cover are further provided with valve stem brackets, and a sliding bearing is provided between the valve stem bracket and the valve stem.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. This practical anti-scouring and wear-resistant ball valve adds replaceable inlet and outlet guide tubes made of ultra-high-strength silicon carbide material at the inlet and outlet valve covers, which are easily damaged by scouring and cause valve leakage, to avoid scouring and causing the entire valve to be scrapped, and achieves the purpose of replacing the parts that are scoured and worn, ensuring the integrity of the steel shell and reducing the cost of the entire production process.

[0015] 2. The practical anti-scour and wear-resistant ball valve has a clamping arrangement of the inlet guide pipe and the outlet guide pipe, which is very easy to replace and has a simple structure and reasonable design. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic structural diagram of an anti-scour and wear-resistant ball valve. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1, an anti-scouring and wear-resistant ball valve, comprising a valve body 1, a valve cover 2, a valve stem 3 and a valve ball 4, the valve ball 4 is placed between the valve body 1 and the valve cover 2, one end of the valve stem 3 is fitted on the valve ball 4, the valve cover 2 comprises an inlet valve cover 21 and an outlet valve cover 22 respectively arranged on both sides of the valve body 1, an inlet guide pipe 5 is arranged on the inner side of the inlet valve cover 21, an outlet guide pipe 6 is arranged on the inner side of the outlet valve cover 22, a valve cover clamping platform 2a for clamping the inlet guide pipe 5 is arranged on the inlet valve cover 21, a valve body clamping groove 1b for clamping the outlet guide pipe 6 is arranged on the valve body 1, and an end cover 7 is also arranged on the inlet guide pipe 5. By adding replaceable ultra-high-strength inlet guide pipe 5 and outlet guide pipe 6 at the positions of the inlet valve cover 21 and the outlet valve cover 22 which are easily damaged by scouring and cause leakage of the valve, scouring is avoided to cause the scrapping of the entire valve, and the purpose of replacing the parts that are scourred and worn is achieved. The integrity of the steel shell is ensured and the cost of the entire production process is reduced. The valve cover clamping platform 2a is used to clamp and assemble the inlet guide pipe 5, which is then fixed by the end cover 7. The valve body clamping groove 1b is used to clamp and assemble the outlet guide pipe 6. The clamping setting is very convenient to replace.

[0019] The inlet guide tube 5 and the outlet guide tube 6 are both made of silicon carbide material. Silicon carbide tubes have superior properties such as high strength, high hardness, good wear resistance, high temperature resistance, corrosion resistance, good heat and shock resistance, high thermal conductivity and good oxidation resistance.

[0020] A valve seat assembly 8 is arranged between the inlet valve cover 21 and the valve ball 4. The valve seat assembly 8 includes a compression spring 81, a sealing valve seat 82 abutting on the valve ball 4, and a sealing base 83 abutting on the sealing valve seat 82. One end of the compression spring 81 is connected to the inlet valve cover 21, and the other end is fitted in the sealing base 82. The valve seat assembly 8 provides elastic force through the compression spring 81 to ensure that the sealing valve seat 82 is always in contact with the valve ball 4, and the sealing effect is excellent.

[0021] A graphite sealing ring 84 is arranged between the sealing base 83 and the sealing valve seat 82. The graphite sealing ring 84 has various properties of expanded graphite and can withstand violently alternating temperature and pressure.

[0022] An upper cover 9 is disposed on the top of the valve body 1 , and a lower cover 10 is disposed on the bottom thereof. Sealing gaskets 11 are disposed between the upper cover 9 and the lower cover 10 and the valve body 1 , respectively, and the sealing gaskets 11 ensure the sealing between the upper and lower covers and the valve body 1 .

[0023] At least two packing groups 12 are arranged between the valve stem 1 and the upper cover 9 . The packing groups 12 are matched with packing glands 13 . The packing glands 13 are fixedly connected to the upper cover 9 . The packing groups 12 ensure the sealing performance of the valve stem 3 .

[0024] A valve stem support 14 is also provided on the inlet valve cover 21 and the outlet valve cover 22 . A sliding bearing 15 is provided between the valve stem support 14 and the valve stem 3 . The valve stem support 14 ensures stable operation of the valve stem 3 .

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-scouring and wear-resistant ball valve, comprising a valve body, a valve cover, a valve stem and a valve ball, wherein the valve ball is placed between the valve body and the valve cover, and one end of the valve stem is fitted on the valve ball, characterized in that: The valve cover comprises an inlet valve cover and an outlet valve cover respectively arranged on both sides of the valve body, an inlet guide pipe is arranged on the inner side of the inlet valve cover, an outlet guide pipe is arranged on the inner side of the outlet valve cover, a valve cover clamping platform for clamping the inlet guide pipe is arranged on the inlet valve cover, a valve body clamping groove for clamping the outlet guide pipe is arranged on the valve body, and an end cover is also arranged on the inlet guide pipe.

2. The anti-scour and wear-resistant ball valve according to claim 1, characterized in that: The inlet guide tube and the outlet guide tube are both made of silicon carbide material.

3. The anti-scour and wear-resistant ball valve according to claim 1, characterized in that: A valve seat assembly is arranged between the inlet valve cover and the valve ball. The valve seat assembly includes a compression spring, a sealing valve seat abutting on the valve ball, and a sealing base abutting on the sealing valve seat. One end of the compression spring is connected to the inlet valve cover, and the other end is fitted in the sealing base.

4. The anti-scour and wear-resistant ball valve according to claim 3, characterized in that: A graphite sealing ring is arranged between the sealing base and the sealing valve seat.

5. An anti-scouring and wear-resistant ball valve according to claim 1, 2, 3 or 4, characterized in that: An upper cover is arranged on the top of the valve body, and a lower cover is arranged on the bottom thereof. Sealing gaskets are arranged between the upper cover and the lower cover and the valve body respectively.

6. The anti-scour and wear-resistant ball valve according to claim 5, characterized in that: At least two packing groups are arranged between the valve stem and the upper cover. The packing groups are matched with packing glands, and the packing glands are fixedly connected to the upper cover.

7. An anti-scour and wear-resistant ball valve according to claim 1, 2, 3 or 4, characterized in that: The inlet valve cover and the outlet valve cover are also provided with valve stem brackets, and a sliding bearing is provided between the valve stem bracket and the valve stem.

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