Grease injection valve with sampling and pressure measurement

Abstract

The present invention relates to a grease injection valve with sampling and pressure measurement functions, which includes a grease injection valve body. A first through hole is provided on the grease injection valve body, and a sampling channel and a pressure measurement channel are also provided on the grease injection valve body. A spherical valve flap is arranged in the first through hole, and the spherical valve flap can disconnect the sampling channel and the pressure measurement channel from the pipeline ball valve. The second end of the first through hole is detachably connected to a sampling transmission structure or a grease injection structure. The sampling transmission structure can push the spherical valve flap to connect the sampling channel and the pressure measurement channel to the pipeline ball valve. The grease injection structure can disconnect the sampling channel and the pressure measurement channel from the pipeline ball valve and inject grease into the pipeline ball valve through the first through hole. A sampling container is connected to the sampling channel in communication, and a pressure gauge is connected to the pressure measurement channel in communication. The present invention has the functions of sampling, pressure measurement, and grease injection at the same time. Compared with the traditional pipeline ball valve connected with a grease injection valve and a sampling and pressure measurement valve respectively, it reduces one external leakage channel, that is, eliminates one potential safety hazard and improves safety.

Description

Technical Field

[0001] The present invention relates to a ball valve for long-distance natural gas pipelines, and particularly to a grease injection valve with sampling and pressure measurement functions. Background Art

[0002] As an efficient, low-carbon, and clean fossil energy, natural gas has started to replace primary energy sources such as coal and oil in many energy-consuming fields. It is an important bridge for the transition to a new energy system and a practical choice to promote energy transformation. The long-term growth trend of natural gas resource supply is promising, which can ensure the sustainable development of the natural gas industry. Among them, with the advantages of easy transportation, diverse main bodies, strong flexibility, safety, and high efficiency. In 2022, the national natural gas production was about 220 billion cubic meters, with an annual increase of more than 10 billion cubic meters. The natural gas import volume decreased steadily. In 2022, the apparent consumption of natural gas in China was 375 - 380 billion cubic meters, with a growth rate of 1% - 3%.

[0003] As an important pipeline switching device for long-distance natural gas pipelines, in case of emergency, when the sealing performance of the conventional valve seat sealing material fails to provide sealing, emergency grease injection is required for auxiliary sealing. Therefore, a grease injection valve needs to be set on the valve seat of the natural gas pipeline ( Figure 4 ). During normal operation, for natural gas pipelines, sampling and pressure measurement are required. Usually, an attached pressure measurement and sampling valve is installed in the middle cavity of the DBB ball valve ( Figure 5 ).

[0004] Prior Art One: On the valve body of the pipeline ball valve, 2 grease injection valves need to be set for grease injection during emergency sealing, and 1 sampling and pressure measurement valve is set for pressure measurement and sampling.

[0005] The disadvantages of this structure are as follows: There are 3 external connections on the valve body, and the potential external leakage points reach 3. Once external leakage occurs, serious safety accidents will occur. Therefore, when designing valves, external connections should be minimized as much as possible. For each reduction of 1 external connection, 1 potential external leakage point is eliminated, that is, 1 potential safety accident hidden danger is eliminated.

[0006] Therefore, based on years of experience and practice in the relevant industry, the inventor of the present invention proposes a grease injection valve with sampling and pressure measurement functions to overcome the defects of the prior art. Summary of the Invention

[0007] The purpose of the present invention is to provide a grease injection valve with sampling and pressure measurement functions, which overcomes the problems existing in the prior art. The present invention simultaneously has the functions of sampling, pressure measurement, and grease injection. Compared with the traditional pipeline ball valve with a separately connected grease injection valve and sampling and pressure measurement valve, 1 external leakage channel is reduced, that is, 1 potential safety hazard is eliminated, improving safety.

[0008] The object of the present invention is achieved in this way. A grease injection valve with sampling and pressure measurement includes a grease injection valve body. A first through hole is provided through the grease injection valve body. The first end of the first through hole is connected to a pipeline ball valve. A sampling channel and a pressure measurement channel that can communicate with the first through hole are also provided on the grease injection valve body. A spherical valve flap is slidably arranged on the side of the first through hole close to the pipeline ball valve with respect to the sampling channel and the pressure measurement channel. The spherical valve flap can disconnect the sampling channel and the pressure measurement channel from communicating with the pipeline ball valve. The second end of the first through hole is detachably connected to a sampling transmission structure or a grease injection structure. The sampling transmission structure can push the spherical valve flap to make the sampling channel and the pressure measurement channel communicate with the pipeline ball valve. The grease injection structure can disconnect the sampling channel and the pressure measurement channel from communicating with the pipeline ball valve and inject grease into the pipeline ball valve through the first through hole. A sampling container is connected in communication with the sampling channel, and a pressure gauge is connected in communication with the pressure measurement channel.

[0009] In a preferred embodiment of the present invention, the first through hole includes a first hole section, a second hole section, and a third hole section sequentially arranged from the first end to the second end. The aperture size of the first hole section is larger than that of the second hole section, and the aperture size of the third hole section is larger than that of the second hole section. The adjacent ends of the first hole section and the second hole section form a first step portion, and the adjacent ends of the third hole section and the second hole section form a second step portion. Both the sampling channel and the pressure measurement channel can communicate with the second hole section. The spherical valve flap is arranged in the first hole section, and the sampling transmission structure or the grease injection structure is detachably connected in the third hole section.

[0010] In a preferred embodiment of the present invention, a spring is arranged at the end of the first hole section away from the second hole section. A spring seat is connected to the spring. The spring seat can push the spherical valve flap under the action of the spring to abut against the first step portion to seal and block the second hole section.

[0011] In a preferred embodiment of the present invention, the sampling transmission structure includes a transmission rod. The transmission rod includes a first abutting column and a connecting rod. The first abutting column can pass through the second hole section, and the diameter size of the first abutting column is smaller than the aperture size of the second hole section. The connecting rod is movably and sealingly connected in the third hole section. When the first abutting column pushes the spherical valve flap away from the first step portion, the end face of the connecting rod abuts against the second step portion.

[0012] In a preferred embodiment of the present invention, a valve cap is sleeved on the transmission rod, and the valve cap can be sealingly fastened and connected to the grease injection valve body.

[0013] In a preferred embodiment of the present invention, a handwheel for driving the transmission rod to rotate and move along the third hole section is connected to the transmission rod, and the handwheel is fixedly connected to the transmission rod through a nut.

[0014] In a preferred embodiment of the present invention, a first sealing ring is sleeved on the connecting rod.

[0015] In a preferred embodiment of the present invention, the grease injection structure includes a second abutting column and a connecting seat. The connecting seat is sealingly connected inside the third hole section. The second abutting column penetrates through the second hole section in a sealed manner. A grease injection channel that can communicate with the first hole section is provided in a through manner inside the second abutting column and the connecting seat.

[0016] In a preferred embodiment of the present invention, a second sealing ring is sleeved on the second abutting column.

[0017] In a preferred embodiment of the present invention, one end of the sampling channel away from the second hole section is sealingly connected to a first pipe joint, and the first pipe joint is sealingly connected to the sampling container; one end of the pressure measuring channel away from the second hole section is sealingly connected to a second pipe joint, and the second pipe joint is sealingly connected to the pressure gauge.

[0018] As described above, the grease injection valve with sampling and pressure measurement of the present invention has the following beneficial effects:

[0019] The grease injection valve with sampling and pressure measurement of the present invention simultaneously has the functions of sampling, pressure measurement, and grease injection. Compared with a traditional pipeline ball valve connected with a grease injection valve and a sampling and pressure measurement valve respectively, it reduces 1 external leakage channel, that is, eliminates 1 potential safety hazard and improves safety;

[0020] The valve flap of the traditional sampling and pressure measurement valve is a needle-shaped structure, similar to the tip of a needle. After being used several times, its sealing is affected due to low strength. The valve flap of the present invention adopts a spherical valve flap, and its sealing is a linear seal, which is more durable and the sealing performance is more reliable;

[0021] The traditional sampling and pressure measurement valve is a needle valve structure, which is large in volume and inconvenient for installation. The grease injection valve with sampling and pressure measurement of the present invention designed by modularization has a compact structure and a small installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention.

[0023] Wherein:

[0024] Figure 1 : is the structural diagram of the grease injection valve with sampling and pressure measurement of the present invention.

[0025] Figure 2: Schematic diagram of the grease injection valve with sampling and pressure measurement in the sampling and pressure measurement state of the present invention.

[0026] Figure 3 : Schematic diagram of the grease injection valve with sampling and pressure measurement in the grease injection state of the present invention.

[0027] Figure 4 : Schematic diagram of the grease injection valve of the prior art.

[0028] Figure 5 : Schematic diagram of the sampling and pressure measurement valve of the prior art.

[0029] In the figure:

[0030] 1. Sampling container; 2. First pipe joint; 3. Spring; 4. Spring seat; 5. Spherical valve flap; 6. Grease injection valve body; 7. Transmission rod; 71. First abutting column; 72. Connecting rod; 8. Second pipe joint; 9. First sealing ring; 10. Valve cap; 11. Pressure gauge; 12. Handwheel; 13. Nut; 14. Second sealing ring; 15. Grease injection structure; 151. Second abutting column; 152. Connecting seat; 161. First hole section; 162. Second hole section; 163. Third hole section; 17. Sampling channel; 18. Pressure measurement channel. Detailed implementation manners

[0031] For a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0032] The detailed implementation manners of the present invention described herein are only for the purpose of explaining the present invention and should not be construed in any way as a limitation of the present invention. Under the teaching of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] As Figures 1 to 3 shown, the present invention provides a grease injection valve with sampling and pressure measurement, which includes a grease injection valve body 6. A first through hole is provided through the grease injection valve body 6. The first end of the first through hole is connected to a pipeline ball valve (prior art, arranged on a natural gas pipeline for sampling and pressure measurement). A sampling channel 17 and a pressure measurement channel 18 that can communicate with the first through hole are also provided on the grease injection valve body 6. A spherical valve flap 5 is slidably arranged inside the first through hole on the side of the sampling channel 17 and the pressure measurement channel 18 close to the pipeline ball valve. The spherical valve flap 5 can disconnect the sampling channel 17 and the pressure measurement channel 18 from communicating with the pipeline ball valve. The second end of the first through hole is detachably connected to a sampling transmission structure or a grease injection structure. The sampling transmission structure can push the spherical valve flap 5 to make the sampling channel 17 and the pressure measurement channel 18 communicate with the pipeline ball valve. The grease injection structure can disconnect the sampling channel 17 and the pressure measurement channel 18 from communicating with the pipeline ball valve and inject grease into the pipeline ball valve through the first through hole. A sampling container 1 is connected and communicated on the sampling channel 17, and a pressure gauge 11 is connected and communicated on the pressure measurement channel 18. The sampling transmission structure and the grease injection structure are modularly designed, which is convenient for installation, disassembly and replacement, and the structure is more compact.

[0035] The grease injection valve with sampling and pressure measurement of the present invention usually adopts a way of using 2 at the same time. Installing 2 grease injection valves with sampling and pressure measurement functions enables the pipeline ball valve to realize sampling, pressure measurement and grease injection functions, and the 2 grease injection valves with sampling and pressure measurement functions can respectively monitor the sealing conditions of each valve seat, which is convenient for mastering the application status of the valve seat.

[0036] The grease injection valve with sampling and pressure measurement of the present invention has the functions of sampling, pressure measurement and grease injection at the same time. Compared with the traditional pipeline ball valve connected with a grease injection valve and a sampling and pressure measurement valve respectively, it reduces 1 external leakage channel, that is, eliminates 1 potential safety hazard and improves safety.

[0037] The valve flap of the traditional sampling and pressure measurement valve is a needle-shaped structure, similar to the tip of a needle. After being used several times, its sealing is affected due to low strength. The valve flap of the present invention adopts a spherical valve flap, and its sealing is a linear sealing, which is more durable and the sealing performance is more reliable.

[0038] The traditional sampling and pressure measurement valve is a needle valve structure, which is large in volume and inconvenient for installation. While the grease injection valve with sampling and pressure measurement of the present invention designed modularly has a compact structure and a small installation space.

[0039] Further, as shown in Figure 1 , Figure 2 , Figure 3 , the first through hole includes a first hole section 161, a second hole section 162, and a third hole section 163 sequentially arranged from the first end to the second end. The aperture size of the first hole section 161 is larger than that of the second hole section 162, and the aperture size of the third hole section 163 is larger than that of the second hole section 162. The adjacent ends of the first hole section 161 and the second hole section 162 form a first step portion, and the adjacent ends of the third hole section 163 and the second hole section 162 form a second step portion; both the sampling channel 17 and the pressure measuring channel 18 can communicate with the second hole section 162; the spherical valve flap 5 is arranged in the first hole section 161, and a sampling drive structure or a grease injection structure 15 is detachably connected in the third hole section 163.

[0040] Further, as shown in Figure 1 , Figure 2 , Figure 3 , a spring 3 is arranged at one end of the first hole section 161 away from the second hole section 162. A spring seat 4 is connected to the spring 3, and a plurality of radial holes are arranged on the side wall of the spring seat 4. The spring seat 4 can push the spherical valve flap 5 under the action of the spring 3 to abut against the first step portion to seal and block the second hole section 162.

[0041] Further, as shown in Figure 1 , Figure 3 , the sampling drive structure includes a drive rod 7. The drive rod 7 includes a first abutting column 71 and a connecting rod 72. The first abutting column 71 can pass through the second hole section 162, and the diameter size of the first abutting column 71 is smaller than the aperture size of the second hole section 162. When the spherical valve flap 5 is pushed open, the sampling channel 17 and the pressure measuring channel 18 communicate with the first hole section 161 through the circumferential gap between the first abutting column 71 and the second hole section 162, so that the pressurized medium from the pipeline ball valve can flow to the sampling container 1 and the pressure gauge 11 through the sampling channel 17 and the pressure measuring channel 18; the connecting rod 72 is movably and sealingly connected in the third hole section 163. When the first abutting column 71 pushes the spherical valve flap 5 away from the first step portion, the end face of the connecting rod 72 abuts against the second step portion. A first sealing ring 9 is sleeved on the connecting rod 72 for radial sealing between the connecting rod 72 and the third hole section to prevent the pressurized medium from the pipeline ball valve from entering the third hole section 163 and leaking.

[0042] Further, as shown in Figure 1 , Figure 3 , a valve cap 10 is sleeved on the drive rod 7, and the valve cap 10 can be sealingly buckled and connected to the grease injection valve body 6.

[0043] Further, as shown in Figure 1 , Figure 3As shown, a handwheel 12 for driving the drive rod to rotate and move along the third hole section 163 is connected to the drive rod 7, and the handwheel 12 is fixedly connected to the drive rod 7 through a nut 13.

[0044] Furthermore, as Figure 1 , Figure 3 shown, a first sealing ring 9 is sleeved on the connecting rod 72. The first sealing ring 9 is used for radial sealing between the connecting rod 72 and the third hole section.

[0045] Furthermore, as Figure 2 shown, the grease injection structure 15 includes a second abutting column 151 and a connecting seat 152. The connecting seat 152 is hermetically connected inside the third hole section 163. The second abutting column 151 hermetically penetrates through the second hole section 162. A grease injection channel that can communicate with the first hole section 161 is provided in a through manner inside the second abutting column 151 and the connecting seat 152.

[0046] Furthermore, as Figure 2 shown, a second sealing ring 14 is sleeved on the second abutting column 151. The second sealing ring 14 isolates the sealing grease to prevent the sealing grease from entering the sampling container 1 and the pressure gauge 11 during grease injection.

[0047] Furthermore, as Figure 1 , Figure 2 , Figure 3 shown, one end of the sampling channel 17 away from the second hole section 162 is hermetically connected to a first pipe joint 2, and the first pipe joint 2 is hermetically connected to the sampling container 1; one end of the pressure measuring channel 18 away from the second hole section 162 is hermetically connected to a second pipe joint 8, and the second pipe joint 8 is hermetically connected to the pressure gauge 11.

[0048] As Figure 1 shown, under normal conditions, the sampling drive structure is connected to the grease injection valve body 6; when the grease injection valve with sampling and pressure measurement of the present invention is used for sampling and pressure measurement, the handwheel 12 is rotated clockwise (this rotation direction is determined according to the actual working conditions), so that the head of the drive rod 7 (the first abutting column 71) abuts against the spherical valve flap 5, and the drive rod 7 is continuously rotated clockwise until the handwheel 12 cannot be rotated clockwise any further. At this time, the spherical valve flap 5 is fully opened, as shown in Figure 2 . The pressurized medium from the pipeline ball valve will pass through several radial holes on the side wall of the spring seat 4, the first hole section 161, the circumferential gap between the first abutting column 71 and the second hole section 162, the sampling channel 17 and the pressure measuring channel 18 and flow into the sampling container 1 and the diaphragm of the pressure gauge 11. At this time, the reading shown on the pressure gauge 11 is the valve cavity pressure of the pipeline ball valve. After the valve cavity pressure is stable, the handwheel 12 is rotated counterclockwise to disengage the head of the drive rod 7 from the spherical valve flap 5 until the handwheel 12 cannot be rotated counterclockwise any further. At this time, under the action of the medium pressure and the elastic force of the spring 3, the spherical valve flap 5 is fully closed, and the sampling and pressure measurement work is completed.

[0049] When the grease injection valve with sampling and pressure measurement of the present invention is used for grease injection,

[0050] Unscrew the nut 13, remove the handwheel 12, then use the handwheel 12 to screw out the transmission rod 7, and remove the handwheel 12 and the transmission rod 7. Screw the grease injection structure 15 with the second sealing ring 14 (O-ring) into the grease injection valve body 6. The function of the second sealing ring 14 is to isolate the sealing grease and prevent the sealing grease from entering the sampling container 1 and the pressure gauge 11 during grease injection. At this time, it becomes a grease injection valve, as shown in Figure 3 . When grease injection is required, the grease injection gun head (prior art) is inserted into the grease injection channel in the grease injection structure 15 to complete the grease injection work.

[0051] As described above, the grease injection valve with sampling and pressure measurement of the present invention has the following beneficial effects:

[0052] The grease injection valve with sampling and pressure measurement of the present invention has the functions of sampling, pressure measurement and grease injection at the same time. Compared with the traditional pipeline ball valve with a grease injection valve and a sampling and pressure measurement valve connected separately, it reduces 1 external leakage channel, that is, eliminates 1 potential safety hazard and improves safety;

[0053] The valve flap of the traditional sampling and pressure measurement valve is a needle-shaped structure, similar to the tip of a needle. After being used several times, its sealing is affected due to low strength. The valve flap of the present invention adopts a spherical valve flap, and its sealing is a linear sealing, which is more durable and the sealing performance is more reliable;

[0054] The traditional sampling and pressure measurement valve is a needle valve structure, which is large in size and inconvenient for installation. However, the grease injection valve with sampling and pressure measurement of the present invention designed by modularization has a compact structure and a small installation space.

[0055] The above are only the schematic specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A grease injection valve with sampling and pressure measurement, characterized in that, it includes a grease injection valve body, a first through hole is penetrated through the grease injection valve body, a first end of the first through hole is communicated with a pipeline ball valve, and a sampling channel and a pressure measurement channel that can be communicated with the first through hole are also arranged on the grease injection valve body; a spherical valve flap is slidably arranged on one side of the sampling channel and the pressure measurement channel close to the pipeline ball valve in the first through hole, and the spherical valve flap can disconnect the sampling channel and the pressure measurement channel from communicating with the pipeline ball valve; a second end of the first through hole is detachably connected to a sampling transmission structure or a grease injection structure, and the sampling transmission structure can push the spherical valve flap to make the sampling channel and the pressure measurement channel communicate with the pipeline ball valve; the grease injection structure can disconnect the sampling channel and the pressure measurement channel from communicating with the pipeline ball valve and inject grease into the pipeline ball valve through the first through hole; the grease injection structure includes a second abutting column penetrated in the first through hole, and a grease injection channel is penetrated in the second abutting column; a sampling container is communicated on the sampling channel, and a pressure gauge is communicated on the pressure measurement channel.

2. The grease injection valve with sampling and pressure measurement according to claim 1, characterized in that, the first through hole includes a first hole section, a second hole section and a third hole section sequentially arranged from the first end to the second end, the aperture size of the first hole section is larger than the aperture size of the second hole section, the aperture size of the third hole section is larger than the aperture size of the second hole section, an adjacent end of the first hole section and the second hole section constitutes a first step portion, and an adjacent end of the third hole section and the second hole section constitutes a second step portion; both the sampling channel and the pressure measurement channel can be communicated with the second hole section; the spherical valve flap is arranged in the first hole section, and the sampling transmission structure or the grease injection structure is detachably connected in the third hole section.

3. The grease injection valve with sampling and pressure measurement according to claim 2, characterized in that, a spring is arranged at one end of the first hole section far from the second hole section, a spring seat is connected to the spring, and the spring seat can push the spherical valve flap to abut on the first step portion under the action of the spring to seal and block the second hole section.

4. The grease injection valve with sampling and pressure measurement according to claim 2, characterized in that, the sampling transmission structure includes a transmission rod, the transmission rod includes a first abutting column and a connecting rod, the first abutting column can pass through the second hole section, and the diameter size of the first abutting column is smaller than the aperture size of the second hole section, and the connecting rod is movably and sealingly connected in the third hole section; when the first abutting column pushes the spherical valve flap away from the first step portion, the end face of the connecting rod abuts on the second step portion.

5. The grease injection valve with sampling and pressure measurement according to claim 4, characterized in that, a valve cap is sleeved on the transmission rod, and the valve cap can be sealingly buckled and connected to the grease injection valve body.

6. The grease injection valve with sampling and pressure measurement according to claim 4, characterized in that, A handwheel for driving the transmission rod to rotate and move along the third hole section is connected to the transmission rod, and the handwheel is fixedly connected to the transmission rod through a nut.

7. The grease injection valve with sampling and pressure measurement according to claim 4, characterized in that a first sealing ring is sleeved on the connecting rod.

8. The grease injection valve with sampling and pressure measurement according to claim 2, characterized in that the grease injection structure includes a connecting seat, the connecting seat is hermetically connected in the third hole section, the second abutting column hermetically penetrates through the second hole section, and a grease injection channel communicating with the first hole section is arranged in a through manner in the second abutting column and the connecting seat.

9. The grease injection valve with sampling and pressure measurement according to claim 8, characterized in that a second sealing ring is sleeved on the second abutting column.

10. The grease injection valve with sampling and pressure measurement according to claim 2, characterized in that one end of the sampling channel far away from the second hole section is hermetically connected to a first pipe joint, and the first pipe joint is hermetically communicated with the sampling container; one end of the pressure measurement channel far away from the second hole section is hermetically connected to a second pipe joint, and the second pipe joint is hermetically communicated with the pressure gauge.

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