Grease injection sealing structure of pressure balance type plug valve

Abstract

The utility model relates to the technical field of plug valves, and discloses a grease injection sealing structure of a pressure balance type plug valve, which comprises a plug valve body, and an oil injection component is arranged on the right side of the plug valve body. The oil injection assembly comprises an oil conveying pipe, the oil conveying pipe is fixedly connected with the front face of the plug valve body, a heating sleeve is fixedly connected to the outer surface of the oil conveying pipe, a valve is fixedly connected to the upper portion of the oil conveying pipe, and the right side of the valve is connected with a pipeline connector through a conveying pipe line. The containing assembly comprises an oil storage bin, the front face of the oil storage bin is fixedly connected with a connector, the connector is in threaded connection with the pipeline connector, and an air guide assembly is arranged above the oil storage bin. Oil is injected into the plug valve body through the oil injection assembly, the sealing effect is achieved, the oil stored in the containing assembly is conveniently guided into the oil injection assembly through the air guiding assembly, and the oil conveying effect is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of plug valves, in particular to a grease injection sealing structure of a pressure-balanced plug valve. Background Art

[0002] The plug valve is a rotary valve in the shape of a closing piece or a plunger. It is a kind of valve that can be opened or closed by rotating 90 degrees to connect or separate the channel opening on the valve plug with the channel opening on the valve body. The shape of its valve plug can be cylindrical or conical. In a cylindrical valve plug, the channel is generally rectangular; in a conical valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve light. It is most suitable for cutting off and connecting media and for diversion, but it can sometimes be used for throttling according to the applicable properties and the erosion resistance of the sealing surface. Its working principle mainly relies on the rotation of the valve core to adjust the flow and pressure of the fluid. The valve core of the plug valve is usually conical or cylindrical, and there are channels and grooves in the valve body. When the valve core rotates, the relative position of the valve core channel and the valve body channel will change, thereby controlling the flow of the fluid. When the valve core rotates to the misalignment with the valve body channel opening, the fluid can pass smoothly; when the valve core rotates to the relative position with the valve body channel opening and closes, the fluid is blocked.

[0003] When the plug valve under the prior art is closed, the valve core will block the fluid in the valve, but the fluid will continue to exert force on the valve core. After long-term use, the airtightness of the valve core may not be tight. At this time, the plug valve needs to be replaced. It is not convenient to maintain the sealing effect by injecting oil or other sealants between the valve plug and the valve body. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a grease injection sealing structure for a pressure-balanced plug valve.

[0006] (II) Technical solution

[0007] To achieve the above object, the utility model provides the following technical solutions: a grease injection sealing structure of a pressure-balanced plug valve, comprising a plug valve body, wherein an oil injection assembly is arranged on the right side of the plug valve body;

[0008] The oil filling assembly includes an oil pipe, which is fixedly connected to the front side of the plug valve body, a heating sleeve is fixedly connected to the outer surface of the oil pipe, a valve is fixedly connected to the top of the oil pipe, a pipe joint is connected to the right side of the valve through a delivery pipe line, a placement assembly is arranged on the right side of the oil filling assembly, the placement assembly includes an oil storage bin, an interface is fixedly connected to the front side of the oil storage bin, the interface is threadedly connected to the pipe joint, an air guide assembly is arranged above the oil storage bin, and an installation assembly is arranged below the oil storage bin.

[0009] Preferably, the mounting assembly includes a mounting seat, the mounting seat is fixedly connected to the right side of the plug valve body, a slide rail is fixedly connected to the right side of the mounting seat, a sliding seat is slidably connected to the right side of the slide rail, the right side of the sliding seat is fixedly connected to the bottom of the oil storage bin via a connecting rod, and a fixed assembly is arranged on the right side of the sliding seat.

[0010] Preferably, the air guide component includes an air bin, the air bin is connected to the oil storage bin via a pipeline, and an air valve is fixedly connected above the air bin.

[0011] Preferably, the fixing assembly comprises an inserting strip, the inserting strip movably penetrates the right side of the sliding seat, the inserting strip is plugged into the right side of the mounting seat, the right side of the inserting strip is fixedly connected with a top plate, and a spring is elastically connected between the top plate and the sliding seat.

[0012] Preferably, the number of the springs is two, the left ends of the two springs are fixedly connected to the right side of the sliding seat, and the right ends of the two springs are fixedly connected to the left side of the top plate.

[0013] Preferably, the cross-sectional shape of the slide rail is trapezoidal, and a dovetail groove matching the slide rail is provided on the left side of the slide seat.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a grease injection sealing structure of a pressure-balanced plug valve, which has the following beneficial effects:

[0016] 1. The grease injection sealing structure of the pressure-balanced plug valve injects oil into the plug valve body through the oil injection assembly to achieve the sealing effect. The oil stored in the placement assembly is conveniently introduced into the oil injection assembly through the air guide assembly, which facilitates the oil transportation.

[0017] Second, the grease injection sealing structure of the pressure-balanced plug valve can facilitate the removal of the placement component through the installation component to facilitate the addition of materials, and the installation component can be fixed through the fixing component, which facilitates the disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a left view of the overall structure of the utility model;

[0021] Figure 3It is the right view of the overall structure of the utility model;

[0022] Figure 4 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 5 For this utility model Figure 1 Enlarged schematic diagram of the structure at point B in the middle.

[0024] In the figure: 1. plug valve body; 2. oil filling assembly; 201. oil delivery pipe; 202. heating sleeve; 203. valve; 204. delivery pipe; 205. pipe joint; 3. placement assembly; 301. oil storage tank; 302. interface; 4. air guide assembly; 401. gas tank; 402. pipeline; 403. air valve; 5. installation assembly; 501. mounting seat; 502. slide rail; 503. sliding seat; 504. connecting rod; 6. fixing assembly; 601. insert; 602. top plate; 603. spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example 1

[0027] like Figure 1-5 As shown, the utility model provides a grease injection sealing structure of a pressure-balanced plug valve, comprising a plug valve body 1, and an oil injection assembly 2 is arranged on the right side of the plug valve body 1;

[0028] The oil filling assembly 2 includes an oil delivery pipe 201, which is L-shaped. The oil delivery pipe 201 is fixedly connected to the front of the plug valve body 1. The plug valve body 1 is provided with a channel connected to the oil delivery pipe 201. The channel leads to the valve plug and the inner wall of the valve body. The outer surface of the oil delivery pipe 201 is fixedly connected to a heating sleeve 202. The heating sleeve 202 is provided with an electric heating wire for heating the oil delivery pipe 201. A valve 203 is fixedly connected to the top of the oil delivery pipe 201. The right side of the valve 203 is connected to a pipeline joint 205 through a delivery pipe 204. The right side of the oil filling assembly 2 is provided with a place for placing Component 3 is placed, component 3 includes an oil storage bin 301, sealing grease is stored in the oil storage bin 301, an interface 302 is fixedly connected to the front of the oil storage bin 301, the interface 302 is threadedly connected to the pipe joint 205, the interface 302 is communicated with the pipe joint 205, an air guide component 4 is arranged above the oil storage bin 301, the air guide component 4 includes an air bin 401, the material of the air bin 401 is soft plastic, the air bin 401 and the oil storage bin 301 are connected by a pipeline 402, an air valve 403 is fixedly connected above the air bin 401, and an installation component 5 is arranged below the oil storage bin 301.

[0029] In this embodiment, oil is injected into the plug valve body 1 through the oil injection component 2 to achieve a sealing effect, and the oil stored in the placement component 3 is easily introduced into the oil injection component 2 through the air guide component 4, which facilitates the transportation of oil.

[0030] Example 2

[0031] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the mounting assembly 5 includes a mounting seat 501, the mounting seat 501 is fixedly connected to the right side of the plug valve body 1, the mounting seat 501 is fixedly connected to the right side of the slide rail 502, the cross-sectional shape of the slide rail 502 is trapezoidal, and a dovetail groove adapted to the slide rail 502 is arranged on the left side of the sliding seat 503, the sliding seat 503 can only be pulled out from the slide rail 502 front and back, and cannot fall off from the right side of the slide rail 502, the right side of the slide rail 502 is slidably connected to the sliding seat 503, and the right side of the sliding seat 503 is fixed to the bottom of the oil storage bin 301 by a connecting rod 504 The right side of the sliding seat 503 is provided with a fixing component 6, the fixing component 6 comprises an inserting strip 601, the inserting strip 601 movably penetrates the right side of the sliding seat 503, the inserting strip 601 is plugged into the right side of the mounting seat 501, a top sheet 602 is fixedly connected to the right side of the inserting strip 601, a spring 603 is elastically connected between the top sheet 602 and the sliding seat 503, the spring 603 will exert a pulling force to pull the top sheet 602 toward the sliding seat 503 under normal conditions, there are two springs 603, the left ends of the two springs 603 are fixedly connected to the right side of the sliding seat 503, and the right ends of the two springs 603 are fixedly connected to the left side of the top sheet 602.

[0032] In this embodiment, the placement component 3 can be easily disassembled through the installation component 5 to facilitate adding materials, and the installation component 5 is fixed by the fixing component 6, which has the function of facilitating disassembly and assembly.

[0033] The following is a detailed description of the working principle of the grease injection sealing structure of this pressure balanced plug valve.

[0034] like Figure 1-5 As shown, when in use, the plug valve body 1 is first installed at the required place. When the plug valve body 1 needs to be closed to block the fluid, the valve core of the plug valve body 1 is first closed. At this time, the grease stored in the oil storage tank 301 is allowed to reach the oil delivery pipe 201 through the delivery pipe 204 by opening the valve 203, and then injected into the plug valve body 1 through the oil delivery pipe 201 to plug the gap. When the grease is blocked at the corner of the oil delivery pipe 201, the oil delivery pipe 201 is heated by the electric heating wire in the heating sleeve 202 to make the grease inject more smoothly. At this time, the grease is injected into the oil delivery pipe 201 by squeezing the air. The air in the air tank 401 is injected into the oil storage tank 301 through the pipe 402 to facilitate faster oil filling. After the air tank 401 is squeezed, the air tank 401 is refilled with air by opening the air valve 403. When the oil storage tank 301 needs to be disassembled to add grease, the pipe joint 205 is first rotated to disconnect it from the interface 302, and then the top plate 602 is pulled to make the insertion strip 601 cancel the fixation of the mounting seat 501. At this time, the sliding seat 503 is pulled out from the slide rail 502 to remove the oil storage tank 301, so as to achieve the purpose of facilitating maintenance.

Claims

1. A grease injection sealing structure for a pressure-balanced plug valve, comprising a plug valve body (1), characterized in that: An oil injection assembly (2) is arranged on the right side of the plug valve body (1); The oil injection assembly (2) comprises an oil delivery pipe (201), the oil delivery pipe (201) is fixedly connected to the front of the plug valve body (1), a heating sleeve (202) is fixedly connected to the outer surface of the oil delivery pipe (201), a valve (203) is fixedly connected to the top of the oil delivery pipe (201), a pipeline joint (205) is connected to the right side of the valve (203) through a delivery pipe (204), a placement assembly (3) is arranged on the right side of the oil injection assembly (2), the placement assembly (3) comprises an oil storage bin (301), an interface (302) is fixedly connected to the front of the oil storage bin (301), the interface (302) is threadedly connected to the pipeline joint (205), an air guide assembly (4) is arranged above the oil storage bin (301), and a mounting assembly (5) is arranged below the oil storage bin (301).

2. The grease injection sealing structure of a pressure-balanced plug valve according to claim 1 is characterized in that: The mounting assembly (5) comprises a mounting seat (501), the mounting seat (501) being fixedly connected to the right side of the plug valve body (1), a slide rail (502) being fixedly connected to the right side of the mounting seat (501), a slide seat (503) being slidably connected to the right side of the slide rail (502), the right side of the slide seat (503) being fixedly connected to the bottom of the oil storage bin (301) via a connecting rod (504), and a fixing assembly (6) being arranged on the right side of the slide seat (503).

3. The grease injection sealing structure of a pressure-balanced plug valve according to claim 1, characterized in that: The gas guide assembly (4) comprises a gas bin (401), the gas bin (401) is connected to the oil storage bin (301) via a pipeline (402), and a gas valve (403) is fixedly connected above the gas bin (401).

4. The grease injection sealing structure of a pressure-balanced plug valve according to claim 2, characterized in that: The fixing assembly (6) comprises an inserting strip (601), the inserting strip (601) movably penetrates the right side of the sliding seat (503), the inserting strip (601) is plugged into the right side of the mounting seat (501), the right side of the inserting strip (601) is fixedly connected with a top plate (602), and a spring (603) is elastically connected between the top plate (602) and the sliding seat (503).

5. The grease injection sealing structure of a pressure-balanced plug valve according to claim 4, characterized in that: There are two springs (603), the left ends of the two springs (603) are fixedly connected to the right side of the sliding seat (503), and the right ends of the two springs (603) are fixedly connected to the left side of the top plate (602).

6. The grease injection sealing structure of a pressure-balanced plug valve according to claim 2, characterized in that: The cross-sectional shape of the slide rail (502) is trapezoidal, and a dovetail groove matching the slide rail (502) is provided on the left side of the slide seat (503).

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