Spherical reversing check valve

Abstract

The utility model relates to the field of reversing check valves of conveying pipelines in the metallurgical mine industry, in particular to a spherical reversing check valve which comprises a lower valve body, an upper valve body, a spherical valve clack, a connecting bolt, a connecting nut and a supporting assembly. The spherical valve clack is arranged in the lower valve body and the upper valve body, the supporting assembly comprises a positioning pin, an adjusting piece and a locking nut, the positioning pin extends into the upper valve body and is in sliding connection with the upper valve body, the adjusting piece is in threaded connection with the upper valve body and is fixedly connected with the positioning pin, and the locking nut is arranged on the outer side of the adjusting piece in a sleeving mode and is in threaded connection with the adjusting piece. The problems that due to the fact that the valve clack cannot be limited in the prior art, the valve clack can deviate at a channel opening, sealing is not tight, and the sealing performance of the valve clack is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the field of reversing check valves for conveying pipelines in the metallurgical mine industry, and particularly to a spherical reversing check valve. Background Art

[0002] At present, for the transportation of media in the metallurgical mine industry, it is required that the transportation operation cannot be interrupted. When the first set of equipment malfunctions and the pump needs to be stopped, the second set of equipment must be started. At this time, stopping the pump, closing the valve, starting the standby pump, and opening the valve are cumbersome operations, laborious and tense, and there may be a flow interruption. Therefore, a spherical reversing check valve is needed.

[0003] The prior art CN203868429U discloses a spherical reversing check valve, which includes a flat valve body and a spherical valve flap inside the valve body; the valve cavity of the valve body is a semi-cylindrical valve cavity; the valve cavity is of a three-way structure, including a first feed inlet, a second feed inlet, and a discharge outlet; the first, second feed inlets and the discharge outlet are respectively connected to the external pipeline through flanges; the inner wall of the valve body is symmetrically provided with a first and a second slide rail; the spherical valve flap is placed on the first and second slide rails and reciprocally rolls along the first and second slide rails under the action of the fluid impact force; the diameter of the spherical valve flap is larger than the diameters of the first and second feed inlets and the discharge outlet, and the spherical valve flap can respectively close the first or the second feed inlet; the first and second slide rails are composed of a circular triangular pyramid in cross section or a frustum of a pyramid; the length of the first slide rail is greater than that of the second slide rail; the unique shape of the raceway inside the valve body of the present invention makes it more reliable and stable; the valve flap has the characteristics of good wear resistance, good elasticity and small specific gravity.

[0004] For the above-mentioned spherical reversing check valve, since the prior art cannot limit the valve flap, the valve flap will shift at the channel opening, resulting in poor sealing and reducing the sealing performance of the valve flap. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a spherical reversing check valve, which solves the problem that due to the inability of the prior art to limit the valve flap, the valve flap will shift at the channel opening, resulting in poor sealing and reducing the sealing performance of the valve flap.

[0006] To achieve the above purpose, the utility model provides a spherical reversing check valve, which includes a lower valve body, an upper valve body, a spherical valve flap, connection bolts, connection nuts and a support assembly. The upper valve body is connected to the lower valve body through the connection bolts and the connection nuts. The spherical valve flap is arranged inside the lower valve body and the upper valve body. The support assembly includes a positioning pin, an adjusting part and a locking nut. The positioning pin extends into the upper valve body and is slidably connected to the upper valve body. The adjusting part is threadedly connected to the upper valve body and fixedly connected to the positioning pin. The locking nut is sleeved outside the adjusting part and is threadedly connected to the adjusting part.

[0007] Among them, the support assembly further includes a sealing ring, and the sealing ring is in close contact with the positioning pin to prevent medium leakage.

[0008] Among them, the spherical changeover check valve further includes a guide rail, and the guide rail is arranged in the upper valve body and is located on one side of the upper valve body close to the spherical valve flap.

[0009] Among them, the spherical changeover check valve further includes an arc-shaped transition plate, and the arc-shaped transition plate is arranged in the lower valve body and is located on one side of the lower valve body close to the spherical valve flap.

[0010] Among them, the spherical changeover check valve further includes a channel port sealing surface, and the channel port sealing surface is arranged in the lower valve body and is located on one side of the lower valve body close to the spherical valve flap.

[0011] A spherical changeover check valve of the present utility model includes a lower valve body, an upper valve body, a spherical valve flap, connecting bolts, connecting nuts and a support assembly. The upper valve body and the lower valve body are connected by the connecting bolts and the connecting nuts. The spherical valve flap is arranged in the lower valve body and the upper valve body. The support assembly includes a positioning pin, an adjusting member and a locking nut. The positioning pin extends into the upper valve body and is slidably connected with the upper valve body. The adjusting member is threadedly connected with the upper valve body and is fixedly connected with the positioning pin. The locking nut is sleeved outside the adjusting member and is threadedly connected with the adjusting member, which solves the problem that the valve flap cannot be limited in the prior art, and the valve flap will shift at the channel port, resulting in poor sealing and reducing the sealing performance of the valve flap. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0013] Figure 1 It is a schematic diagram of the overall structure of the spherical changeover check valve of the present utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the positioning pin of the present utility model.

[0015] Figure 3 It is a schematic diagram of the structures of the guide rail, the arc-shaped transition plate and the channel port sealing surface of the present utility model.

[0016] In the figure: 1 - lower valve body, 2 - spherical valve flap, 3 - upper valve body, 4 - connecting bolt, 5 - connecting nut, 6 - positioning pin, 7 - adjusting member, 8 - locking nut, 9 - sealing ring, 10 - positioning seat, 11 - guide rail, 12 - arc-shaped transition plate, 13 - channel port sealing surface.

[0017] In the figure: 1 - lower valve body 1, 2 - spherical valve flap 2, 3 - upper valve body 3, 4 - connecting bolt 4, 5 - connecting nut 5, 6 - positioning pin 6, 7 - adjusting part 7, 8 - locking nut 8, 9 - sealing ring 9, 10 - positioning seat 10, 11 - guide rail 11, 12 - arc-shaped transition plate 12, 13 - channel port sealing surface 13. Specific embodiments

[0018] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation of the present invention.

[0019] The embodiments of this application are as follows:

[0020] Please refer to Figures 1 - 3 , Figure 1 which is the overall structural schematic diagram of the spherical reversing check valve of the present invention, Figure 2 which is the structural schematic diagram of the positioning pin 6 of the present invention, Figure 3 which is the structural schematic diagram of the guide rail 11, arc-shaped transition plate 12 and channel port sealing surface 13 of the present invention.

[0021] The spherical reversing check valve of the present invention includes a lower valve body 1, a spherical valve flap 2, an upper valve body 3, a connecting bolt 4, a connecting nut 5, a positioning pin 6, an adjusting part 7, a locking nut 8, a sealing ring 9, a positioning seat 10, a guide rail 11, an arc-shaped transition plate 12, and a channel port sealing surface 13, which solves the problem that the valve flap cannot be limited in the prior art, and the valve flap will shift at the channel port, resulting in poor sealing and reduced sealing performance of the valve flap. It can be understood that the foregoing solution can also be used to improve the stability of the valve body.

[0022] In this embodiment, the inner cavities of the upper valve body 3 and the lower valve body 1 are both lined with rubber, and the outer surface of the spherical valve flap 2 is lined with rubber. The outlet pipes of two pumps are respectively butted with two inlet channels of the lower valve body 1, and the medium flows out from the upper outlet. When the first pump works, the medium flows through the inlet, pushes the spherical valve flap 2 to the other channel inlet, and seals the inlet. When the first pump needs to stop working and the second pump is started, the first pump can be closed and the second pump can be started to work at the same time. When the second pump works, the spherical valve flap 2 is pushed to the pipe inlet of the first pump again to seal the inlet. The two pumps work alternately, and the medium transportation is continuous. The material of the spherical valve flap 2 is made of manganese steel, which increases the specific gravity per unit volume and eliminates magnetism, which is beneficial to sealing. Practice has proved that the specific gravity per unit volume of the spherical valve flap 2 is twice that of the medium. In this way, the medium can easily push the spherical valve flap 2 to the other side without generating swirling or floating. The spherical valve flap 2 stably lands on the sealing surface to achieve the best sealing effect. By arranging the support assembly at the channel outlet, after the spherical valve flap 2 moves to the sealing surface, the support assembly can limit the excessive movement of the spherical valve flap 2 so that it will not continue to shift, playing a role in increasing the sealing performance, thus solving the problem that the valve flap cannot be limited in the prior art, and the valve flap will shift at the channel opening, resulting in poor sealing and reducing the sealing performance of the valve flap.

[0023] Among them, the positioning pin 6 extends into the upper valve body 3 and is slidably connected to the upper valve body 3. The adjusting member 7 is threadedly connected to the upper valve body 3 and fixedly connected to the positioning pin 6. The locking nut 8 is sleeved outside the adjusting member 7 and is threadedly connected to the adjusting member 7. A process hole is provided on the upper valve body 3. The positioning pin 6 extends into the upper valve body 3 through the process hole. A positioning seat 10 is welded at the position of the upper valve body 3 corresponding to the process hole. The positioning seat 10 has a threaded through hole. An external thread is provided on the outside of the adjusting member 7. The adjusting member 7 extends into the positioning seat 10 and is threadedly connected to the positioning seat 10. The end of the positioning pin 6 is fixedly connected to the adjusting member 7. By turning the adjusting member 7, the front and rear positions of the positioning pin 6 can be adjusted. The locking nut 8 is sleeved on the adjusting member 7 and is threadedly connected through the external thread of the adjusting member 7. After turning the adjusting member 7 and adjusting the positioning pin 6 to a suitable position, then tighten the locking nut 8 so that it abuts against the positioning seat 10, and the positioning pin 6 can be locked. One end of the positioning pin 6 extending into the upper valve body 3 will abut against the spherical valve flap 2, thereby playing a role in limiting the spherical valve flap 2. By providing the support assembly at the channel outlet, after the spherical valve flap 2 moves to the sealing surface, the support assembly can limit the excessive movement of the spherical valve flap 2 so that it will not continue to shift, playing a role in increasing the sealing performance, thus solving the problem that the valve flap cannot be limited in the prior art, and the valve flap will shift at the channel opening, resulting in poor sealing and reducing the sealing performance of the valve flap.

[0024] Secondly, the sealing ring 9 is in close contact with the positioning pin 6 to prevent medium leakage. The sealing ring 9 is arranged on the inner wall of the positioning seat 10. The sealing ring 9 is in close contact with the positioning pin 6. Through the sealing ring 9, the gap between the positioning seat 10 and the positioning pin 6 can be filled, the sealing performance can be improved, and medium leakage can be prevented.

[0025] At the same time, the guide rail 11 is arranged in the upper valve body 3 and is located on the side of the upper valve body 3 close to the spherical valve flap 2. The guide rail 11 is arranged on the inner wall of the upper valve body 3 to control the spherical valve flap 2 to roll from one end to the channel opening at the other end. Through the guide rail 11, the spherical valve flap 2 can fall more accurately at the channel outlet seal to achieve the sealing effect.

[0026] In addition, the arc-shaped transition plate 12 is arranged inside the lower valve body 1 and on the side of the lower valve body 1 close to the spherical valve flap 2. The arc-shaped transition plate 12 is arranged between the two channels of the lower valve body 1. During the process of the spherical valve flap 2 being pushed by the medium, the slag liquid near the internal sealing surface naturally drains out along the arc-shaped transition plate 12 and cannot form accumulated slag. There is an overall slag guiding effect between the lower valve body 1 and the spherical valve flap 2. Through the arc-shaped transition plate 12, the solids mixed in the medium can be automatically drained out by gravity and slope during the pushing of the medium, preventing accumulated slag.

[0027] Finally, the channel port sealing surface 13 is arranged inside the lower valve body 1 and on the side of the lower valve body 1 close to the spherical valve flap 2. Both the channel port sealing surface 13 and the outer surface of the spherical valve flap 2 are made of rubber material, vulcanized and shaped by a special mold. The sealing form is linear sealing. However, under the action of pressure, the channel port sealing surface 13 generates a slight deformation, making the sealing line wider and the sealing effect more reliable. Through the channel port sealing surface 13, the sealing effect can be improved.

[0028] In this embodiment, a rubber-lined sealing structure is adopted, and the sealing form is linear sealing. When one side of the pump starts and the medium enters the inlet end of the valve, the spherical valve flap 2 is pushed by the acting force of the medium to the other channel port. Under the action of pressure, the sealing surface generates a slight deformation, making the sealing line wider and the sealing effect more reliable. When the other pump starts, the spherical valve flap 2 is acted on by the reaction force of the medium to the original channel port, preventing the medium from flowing back. The arc-shaped transition plate 12 is arranged between the two channels of the lower valve body 1. During the process of the spherical valve flap 2 being pushed by the medium, the slag liquid near the internal sealing surface naturally drains out along the arc-shaped transition plate 12 and cannot form accumulated slag. There is an overall slag guiding effect between the lower valve body 1 and the spherical valve flap 2. The support assembly is arranged in the upper valve body 3. After the spherical valve flap 2 falls on the channel port seal, the positioning pin 6 is rotated for positioning, and then fixed with the locking nut 8 to lock the positioning pin 6, thereby playing a limiting role on the spherical valve flap 2. By arranging the support assembly at the channel outlet in this application, after the spherical valve flap 2 moves to the sealing surface, the support assembly can limit the excessive movement of the spherical valve flap 2, preventing it from continuing to shift, and playing a role in increasing the sealing performance, thus solving the problem that the valve flap cannot be limited in the prior art, and the valve flap will shift at the channel port, resulting in poor sealing and reduced sealing performance of the valve flap.

[0029] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A spherical reversing check valve, comprising a lower valve body, an upper valve body, a spherical valve flap, connecting bolts and connecting nuts. The upper valve body is connected to the lower valve body by the connecting bolts and the connecting nuts. The spherical valve flap is arranged inside the lower valve body and the upper valve body, and is characterized in that, it further comprises a support assembly; The support assembly includes a positioning pin, an adjusting member and a locking nut. The positioning pin extends into the upper valve body and is slidably connected to the upper valve body. The adjusting member is threadedly connected to the upper valve body and fixedly connected to the positioning pin. The locking nut is sleeved outside the adjusting member and is threadedly connected to the adjusting member.

2. The spherical reversing check valve according to claim 1, wherein, the support assembly further includes a sealing ring which is in close contact with the positioning pin to prevent medium leakage.

3. The spherical reversing check valve according to claim 1, wherein, the spherical reversing check valve further includes a guide rail which is arranged inside the upper valve body and is located on one side of the upper valve body close to the spherical valve flap.

4. The spherical reversing check valve according to claim 1, wherein, the spherical reversing check valve further includes an arc-shaped transition plate which is arranged inside the lower valve body and is located on one side of the lower valve body close to the spherical valve flap.

5. The spherical reversing check valve according to claim 1, wherein, the spherical reversing check valve further includes a channel port sealing surface which is arranged inside the lower valve body and is located on one side of the lower valve body close to the spherical valve flap.

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