High-pressure-resistant plug valve

Abstract

The utility model relates to the technical field of plug valves, and discloses a high-pressure-resistant plug valve which comprises a valve body, a sealing plug cock is arranged in the valve body, a first channel is formed in the surface of the sealing plug cock, a second channel communicated with the first channel is formed in the bottom end of the sealing plug cock, and the second channel is communicated with the second channel. Connecting assemblies for installing the valve body are arranged at the two ends of the valve body, a limiting base is arranged at the bottom end of the valve body, and a third channel communicated with the second channel is formed in the middle of the bottom end of the limiting base; the valve body can be connected with a pipeline through the connecting assembly, the firmness and stability of valve body installation are improved, water leakage is not prone to being caused in the high-pressure state, the pressure relief assembly can be supported through the sealing cover, a pressure relief pipe is welded to the bottom of the guide pipe, and when the water pressure in the valve body increases suddenly, a third channel can be opened through the pressure relief assembly; the pressure relief pipe can guide the water into a pipeline, so that the flow of the water is increased, and the pressure reduction effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a high-pressure resistant plug valve. Background Art

[0002] A plug valve is a valve that connects or separates the channel opening on the valve plug with the channel opening on the valve body by rotating 90 degrees. Its opening and closing part is a plug body with a through hole, and the plug body is opened or closed by controlling the rotation of the plug body by the valve stem. The shape of the valve plug of the plug valve can be cylindrical or conical, and the shape of the channel is also different. The channel of the cylindrical valve plug is generally rectangular, while the channel of the conical valve plug is trapezoidal. These different shapes make the structure of the plug valve relatively light.

[0003] Its application number is "201920341087.7" disclosed "a high-pressure resistant plug valve", which "comprises a base, a pressing block, a groove, a manual rod and a methyl fiber layer, a pressing block is provided at the center position inside the base, and the top of the pressing block extends to the outside of the base, the base on both sides of the pressing block are provided with grooves, and the inside of the grooves are provided with sealing rings, and the outer walls on both sides of the base are installed with equally spaced clips, and the outer walls of the base are provided with rings, and the inner walls of the rings are provided with equally spaced grooves, and springs are fixed on the inner walls of the grooves, and the inside of the grooves on one side of the springs are provided with soft inclined plates, and baffles are installed on the inner walls of the grooves above the soft inclined plates, and the inner walls of the base are coated with waterproof paint. The utility model not only avoids the phenomenon of off-target when the plug valve is in use, improves the convenience of using the plug valve, but also extends the service life of the plug valve."

[0004] However, the above method still has the following defects: the plug valve can be installed by means of the buckle and the ring, but it is difficult to ensure the fit and firmness of the installation surface, resulting in poor stability, and it is easy to cause water leakage under high pressure conditions. The high-pressure resistance is poor, and when the water pressure increases suddenly, the ring is easily caused to fall off under the action of the water pressure impact force. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a high-pressure resistant plug valve, which has the advantages of not easily causing water leakage under high-pressure conditions and good high-pressure resistance, thereby solving the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical solution: a high-pressure resistant plug valve, comprising a valve body, a sealing plug is provided inside the valve body, a channel one is provided on the surface of the sealing plug, a channel two communicating with the channel one is provided at the bottom end of the sealing plug, connecting components are provided at both ends of the valve body for mounting the same, a limit seat is provided at the bottom end of the valve body, a channel three communicating with the channel two is provided in the middle of the bottom end of the limit seat, a conduit is provided at the bottom end of the limit seat, a sealing cover is provided at the bottom end of the conduit, a pressure relief component for sealing the channel three is provided at the bottom end of the sealing cover, and a pressure relief pipe is provided at the bottom of the conduit.

[0007] As an optimal technical solution of the present invention, the connecting assembly includes flange 1, which is welded to both ends of the valve body. A retaining ring is welded on the surface of the flange 1, and a plurality of threaded holes are opened on the surface of the retaining ring. The internal threads of the threaded holes are connected to screws, and one end of the screw is provided with a frustum.

[0008] As a preferred technical solution of the present invention, a groove is provided on one side of the flange 1, and a sealing gasket is snap-connected inside the groove.

[0009] As a preferred technical solution of the present invention, the pressure relief assembly includes a support plate, a plurality of support rods are provided at the bottom end of the support plate, the bottom ends of the support rods are fixedly connected to the top end of the sealing cover, a column groove is provided in the middle of the support plate, a guide column is slidably connected to the inside of the column groove, a spring is provided on the surface of the guide column, a sealing plug is provided at the top end of the guide column, and a rubber ring is provided in the middle and the top of the sealing plug to seal channel three.

[0010] As an optimal technical solution of the present invention, a stud is provided in the middle of the bottom end of the guide column, the stud is threadedly connected with a nut, the nut is located at the bottom end of the support plate, and the spring is located between the support plate and the sealing plug.

[0011] As a preferred technical solution of the present invention, a driving member is provided on the top of the valve body, a valve stem is provided on the bottom of the driving member, and the bottom end of the valve stem is connected to the top end of the sealing plug.

[0012] As an optimal technical solution of the present invention, a positioning ring is fixedly provided at the bottom end of the catheter, the bottom end of the positioning ring is fixedly connected to the top end of the sealing cover by bolts, and a water stop ring is provided between the positioning ring and the sealing cover.

[0013] As a preferred technical solution of the present invention, a flange 2 is fixedly provided on the output end of the pressure relief pipe, and a sealing ring is snap-connected to one side of the flange 2.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The valve body can be connected to the pipeline through the connecting component, which improves the firmness and stability of the valve body installation. It is not easy to cause water leakage under high pressure. The pressure relief component can be supported by the sealing cover. The bottom of the conduit is welded with a pressure relief pipe. When the water pressure inside the valve body increases sharply, channel three can be opened through the pressure relief component, and the pressure relief pipe can introduce it into the pipeline, increasing the flow of water and achieving a pressure reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the structural diagrams of the present utility model;

[0017] Figure 2 This is the second structural diagram of the present utility model;

[0018] Figure 3 This is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure inside the catheter of the utility model;

[0020] Figure 5 This is a schematic diagram of the exploded structure of the connection assembly of the utility model;

[0021] Figure 6 This is a schematic diagram of the explosion structure of the pressure relief component of the utility model.

[0022] In the figure: 1. Valve body; 2. Sealing plug; 3. Channel 1; 4. Channel 2; 5. Connecting assembly; 501. Flange 1; 502. Groove; 503. Sealing gasket; 504. Retaining ring; 505. Threaded hole; 506. Screw; 507. Cone; 6. Driving member; 7. Valve stem; 8. Limit seat; 9. Channel 3; 10. Conduit; 11. Pressure relief pipe; 12. Flange 2; 13. Sealing ring; 14. Positioning ring; 15. Sealing cover; 16. Water stop ring; 17. Pressure relief assembly; 1701. Support plate; 1702. Support rod; 1703. Column groove; 1704. Guide column; 1705. Spring; 1706. Stud; 1707. Nut; 1708. Sealing plug; 1709. Rubber ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 6, high-pressure resistant plug valve, including a valve body 1, a sealing plug 2 is provided inside the valve body 1, and a channel 3 is opened on the surface of the sealing plug 2, and a channel 2 4 communicating with the channel 1 3 is opened at the bottom end of the sealing plug 2. Both ends of the valve body 1 are provided with a connecting component 5 for installing it. The valve body 1 can be connected to the pipeline through the connecting component 5, which improves the firmness and stability of the installation of the valve body 1 and is not easy to cause water leakage under high pressure. The bottom end of the valve body 1 is welded with a limiting seat 8, and the middle part of the bottom end of the limiting seat 8 is provided with a channel 3 9 communicating with the channel 2 4. The bottom end of the limiting seat 8 is welded with a conduit 10, and the bottom end of the conduit 10 is fixed with a sealing cover 15 by bolts. The bottom end of the sealing cover 15 is provided with a pressure relief component 17 for sealing the channel 3 9. The pressure relief component 17 can be supported by the sealing cover 15. A pressure relief pipe 11 is welded to the bottom of the conduit 10. When the water pressure inside the valve body 1 increases sharply, the channel 3 9 can be opened through the pressure relief component 17, thereby increasing the flow rate of the water body and achieving a pressure reduction effect;

[0025] In this embodiment, preferably, the connecting assembly 5 includes a flange 501, which is welded to both ends of the valve body 1, and a retaining ring 504 is welded on the surface of the flange 501. The surface of the retaining ring 504 is provided with a plurality of threaded holes 505. The internal threads of the threaded holes 505 are connected with screws 506. One end of the screw 506 is provided with a round table 507. One side of the flange 501 is provided with a groove 502. The interior of the groove 502 is engaged with a sealing gasket 503. The valve body 1 can be connected to the pipeline through the flange 501. The sealing gasket 5 03 can seal flange 1 501. By putting retaining ring 504 on the flange of the pipeline, the fit between flange 1 501 and the pipeline flange can be ensured. Sealing gasket 503 can seal it. Flange 1 501 is connected to the pipeline flange by bolts, and screw 506 is screwed in. Screw 506 can fit the pipeline flange by relying on the inclined surface of the round table 507 at one end of the screw 506, which can reinforce the pipeline flange. The bolts fixing flange 1 501 are not easy to loosen. When the water pressure is high, water is not easy to leak through flange 1 501.

[0026] In this embodiment, preferably, the pressure relief assembly 17 includes a support plate 1701, and a plurality of support rods 1702 are provided at the bottom end of the support plate 1701. The bottom end of the support rod 1702 is fixedly connected to the top of the sealing cover 15. A column groove 1703 is provided in the middle of the support plate 1701. A guide column 1704 is slidably connected inside the column groove 1703. The surface of the guide column 1704 is provided with a spring 1705. The top of the guide column 1704 is provided with a sealing plug 1708. The middle part and the top of the sealing plug 1708 are provided with a rubber ring 1709 for sealing the channel three 9. The spring 1705 can be limited by the guide column 1704, and the spring 1705 can support the sealing plug 1708. The support plate 1701 can make it fit tightly with the channel 3 9. The rubber ring 1709 can ensure the sealing between the sealing plug 1708 and the channel 3 9. When the water pressure increases sharply, the pressure can be transmitted to the sealing plug 1708. The sealing plug 1708 can compress the spring 1705 and open the channel 3 9, so as to increase the water flow through the channel 3 9. A stud 1706 is provided in the middle of the bottom end of the guide column 1704. The stud 1706 is threadedly connected with a nut 1707. The nut 1707 is located at the bottom end of the support plate 1701. The spring 1705 is located between the support plate 1701 and the sealing plug 1708. The nut 1707 can prevent the guide column 1704 from falling off. The guide column 1704 can be removed by loosening the nut 1707.

[0027] In this embodiment, preferably, a driving member 6 is fixed to the top of the valve body 1 by bolts, and a valve stem 7 is fixed to the bottom of the driving member 6. The bottom end of the valve stem 7 is connected to the top end of the sealing plug 2. The valve stem 7 is driven by the driving member 6 to drive the sealing plug 2 to rotate.

[0028] In this embodiment, preferably, a positioning ring 14 is welded to the bottom end of the conduit 10, and the bottom end of the positioning ring 14 is fixedly connected to the top end of the sealing cover 15 by bolts. A water stop ring 16 is provided between the positioning ring 14 and the sealing cover 15. The positioning ring 14 can support the sealing cover 15, and the water stop ring 16 can seal the sealing cover 15.

[0029] In this embodiment, preferably, a flange 2 12 is welded to the output end of the pressure relief pipe 11 , and a sealing ring 13 is snap-connected to one side of the flange 2 12 . The pressure relief pipe 11 can be connected to the pipeline through the flange 2 12 , and the sealing ring 13 can seal the flange 2 12 .

[0030] When in use, first put the pipe flange into the retaining ring 504 of the connecting assembly 5 so that it fits with the flange 1 501, and then fix it to the flange 1 501 with bolts, and then screw the screw 506 into the threaded hole 505 of the retaining ring 504 so that the round platform 507 at one end of the screw 506 fits the pipe flange. The screw 506 can reinforce the pipe flange through the round platform 507, and finally connect the pressure relief pipe 11 to the pipeline through the flange 2 12 to achieve the installation between the valve body 1 and the pipeline. After installation, the sealing gasket 503 can seal the connection between the valve body 1 and the pipeline. The staff drives the valve stem 7 through the driving member 6 to rotate the sealing cock 2 and adjust the horizontal angle of the channel 1 3 so that it is in the same direction as the pipeline to open the valve body 1. When the water pressure is high, the screw 506 can prevent the pipe flange from loosening, thereby avoiding water leakage.

[0031] When the water pressure inside the pipeline increases sharply, the pressure can be transmitted to the sealing plug 1708 of the pressure relief assembly 17. When the sealing plug 1708 is subjected to a large pressure, the spring 1705 can be compressed and the channel three 9 can be opened. The water body can be diverted through the channel two 4 and the channel three 9, increasing the flow rate. The pressure relief pipe 11 can introduce it into the pipeline, increasing the flow rate of the water body, which can have the effect of reducing pressure. The staff removes the sealing cover 15 and then loosens the nut 1707 that fixes the guide column 1704. The guide column 1704 and the sealing plug 1708 can be removed. Once damaged, they can be repaired and replaced.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure resistant plug valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a sealing plug (2) inside, a channel 1 (3) is provided on the surface of the sealing plug (2), a channel 2 (4) communicating with the channel 1 (3) is provided at the bottom end of the sealing plug (2), both ends of the valve body (1) are provided with connecting components (5) for installing the same, a limit seat (8) is provided at the bottom end of the valve body (1), a channel 3 (9) communicating with the channel 2 (4) is provided in the middle of the bottom end of the limit seat (8), a conduit (10) is provided at the bottom end of the conduit (10), a sealing cover (15) is provided at the bottom end of the sealing cover (15), a pressure relief component (17) for sealing the channel 3 (9) is provided at the bottom end of the conduit (10), and a pressure relief pipe (11) is provided at the bottom of the conduit (10).

2. The high-pressure resistant plug valve according to claim 1, characterized in that: The connecting assembly (5) includes a flange (501) which is welded to both ends of the valve body (1). A retaining ring (504) is welded to the surface of the flange (501). The surface of the retaining ring (504) is provided with a plurality of threaded holes (505). The internal threads of the threaded holes (505) are connected to screws (506). One end of the screw (506) is provided with a round table (507).

3. The high-pressure resistant plug valve according to claim 2, characterized in that: A groove (502) is provided on one side of the flange 1 (501), and a sealing gasket (503) is snap-connected inside the groove (502).

4. The high-pressure resistant plug valve according to claim 1, characterized in that: The pressure relief assembly (17) includes a support plate (1701), the bottom end of the support plate (1701) is provided with a plurality of support rods (1702), the bottom ends of the support rods (1702) are fixedly connected to the top end of the sealing cover (15), the middle part of the support plate (1701) is provided with a column groove (1703), the interior of the column groove (1703) is slidably connected with a guide column (1704), the surface of the guide column (1704) is provided with a spring (1705), the top end of the guide column (1704) is provided with a sealing plug (1708), and the middle part and the top of the sealing plug (1708) are provided with a rubber ring (1709) for sealing the channel three (9).

5. The high-pressure resistant plug valve according to claim 4, characterized in that: A stud (1706) is provided in the middle of the bottom end of the guide column (1704), and the stud (1706) is threadedly connected to a nut (1707). The nut (1707) is located at the bottom end of the support plate (1701), and the spring (1705) is located between the support plate (1701) and the sealing plug (1708).

6. The high-pressure resistant plug valve according to claim 1, characterized in that: A driving member (6) is provided on the top of the valve body (1), a valve stem (7) is provided on the bottom of the driving member (6), and the bottom end of the valve stem (7) is connected to the top end of the sealing cock (2).

7. The high-pressure resistant plug valve according to claim 1, characterized in that: A positioning ring (14) is fixedly provided at the bottom end of the conduit (10), and the bottom end of the positioning ring (14) is fixedly connected to the top end of the sealing cover (15) through bolts. A water stop ring (16) is provided between the positioning ring (14) and the sealing cover (15).

8. The high-pressure resistant plug valve according to claim 1, characterized in that: The output end of the pressure relief pipe (11) is fixedly provided with a second flange (12), and a sealing ring (13) is snap-connected to one side of the second flange (12).

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