Natural gas pipeline pressure gauge on-line verification device

Abstract

The utility model provides an on-line verification device for a natural gas pipeline pressure gauge, which is characterized in that an on-line pressure instrument is quickly connected with the on-line verification device through 1 / 4 NPT interfaces at the two ends of a quick connection hose, a first handle is adjusted to pressurize the verification device to be close to a verification point, a second handle is finely adjusted to finely adjust the pressure in the verification device, and the on-line verification device can be quickly connected with the on-line pressure instrument. And comparing numerical values of the online pressure instrument and the high-precision digital display pressure transmitter to complete verification or calibration of the online pressure instrument. In the whole verification process, the detected pressure instrument and the verification device only need to be connected through the rapid interface, and operation is easy, convenient, efficient and rapid. The pressure in the verification device can be finely adjusted, multi-point on-line detection is completed, and verification data is accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of online verification of pressure gauges, in particular to an online verification device for a natural gas pipeline pressure gauge. Background Art

[0002] In the process of natural gas pipeline transmission and distribution, whether pressure data can be accurately obtained is very important for safe production and pipeline network deployment. The accuracy of pressure collection in the natural gas metering system also has a huge impact on the natural gas metering results. The accuracy of pressure value is directly related to the interests of both parties in the natural gas transaction. According to the inspection cycle of measuring instruments, the calibration cycle of pressure gauges and pressure transmitters used to measure pressure is 1 year. During this period, the measurement performance of pressure gauges and pressure transmitters is generally ensured by comparing them with pressure gauges installed on the same pipeline. However, during the on-site inspection, it was found that some metering processes only installed one pressure gauge or pressure transmitter for measuring pressure, and the pressure gauges installed on the same pipeline had inconsistent accuracy and were difficult to disassemble, so it was impossible to guarantee whether the measured pressure was accurate.

[0003] The Chinese patent "A Multifunctional Pressure Calibrator" with patent number CN220751444 U discloses a multifunctional pressure calibrator. By adding an engaging groove, an engaging block, an upper clamping seat, a lower clamping seat, a connecting pipe one and a stud, the engaging blocks at the lower ends of the three connecting seats are respectively engaged with the three groups of engaging grooves provided on the upper surface of the base, and the studs at the upper ends of the three connecting seats are respectively connected to the calibrator body, the oil cup and the pressure gauge. A lower clamping seat is provided at the front end center of the upper surface of the base, and the outer surface of the hand pump is fitted with the inner side surface of the lower clamping seat, and the inner side surface of the upper clamping seat is also fitted with the outer surface of the hand pump. The hand pump and the three groups of connecting seats are connected by connecting pipe one, connecting pipe two and connecting pipe three, so as to achieve a detachable effect. By adding a battery slot and a rechargeable battery, it can meet the calibration work when there is no power supply, but it does not involve the content of online calibration.

[0004] The Chinese patent "A Wireless Pressure Calibrator" with patent number CN220304730U mainly includes a wireless pressure calibrator body, a limit base is provided at the bottom of the wireless pressure calibrator body, two slots are provided on the top sides of both ends of the limit base, and an active slot B is provided on the side of the slot away from the middle of the limit base. The end faces of the wireless pressure calibrator body facing the four active slots B are provided with plug blocks. This utility model patent simplifies the operation of disassembling and assembling the wireless pressure calibrator body by requiring the operator to operate in one step during disassembly and assembly, but does not involve the content of online multi-point calibration.

[0005] None of the above patents have the function of online calibration of pressure detection instruments. Therefore, how to realize efficient, convenient and safe online multi-point calibration of pressure instruments is a problem that needs to be solved urgently. Utility Model Content

[0006] In order to solve the technical problem of how to realize efficient, convenient and safe online multi-point calibration of pressure instruments, the utility model proposes an online verification device for natural gas pipeline pressure gauges, which adopts a portable pressure calibration box and a quick-connect hose to realize efficient, convenient and safe online multi-point calibration of online pressure instruments.

[0007] The utility model provides the following specific solutions:

[0008] A natural gas pipeline pressure gauge online verification device comprises: a portable pressure calibration box and a quick connection hose connected to a second pressure output interface (113) of the portable pressure calibration box;

[0009] The portable pressure calibration box comprises a box body and a box cover, wherein the box cover is located above the box body and one side of the box cover is rotatably connected to the box body, and a first pressure pressurizing device and a second pressure pressurizing device are arranged inside the box body; the first pressure pressurizing device and the second pressure pressurizing device are respectively connected through a first hose and a second hose, and a first stop valve is installed on the first hose, and the output interface of the first pressure pressurizing device (103) is connected to the input end of the second stop valve (109); the first pressure output interface (112) of the second pressure pressurizing device (104) is connected to the input end of the standard gauge interface (110) on the second hose (106); a pressure relief valve is installed between the standard gauge interface (110) of the second hose (106) and the second stop valve (109); the first pressure output interface of the second pressurizing device is connected to the second pressure output interface through a third hose, and the control modules of the first stop valve, the second stop valve, the standard gauge interface, the pressure relief valve, the first pressure output interface and the second pressure output interface are all distributed on the upper end surface of the box; a first handle for controlling the first pressurizing device and a second handle for controlling the second pressurizing device are provided on the side of the box; a high-precision digital pressure transmitter is detachably installed on the standard gauge interface;

[0010] The two ends of the quick-connect hose are respectively provided with 1 / 4NPT interfaces, the 1 / 4NPT interface at one end is used to connect with the second pressure output interface, and the other end is connected with the pressure gauge to be detected.

[0011] Preferably, the first pressure output interface is a 1 / 2NPT interface, and the second pressure output interface is a 1 / 4NPT interface.

[0012] Preferably, the second handle (115) is a fine-tuning handle.

[0013] Preferably, the entire outer box of the portable pressure calibration box is made of stainless steel and is wrapped with a layer of insulating rubber on the outside.

[0014] Preferably, the portable pressure calibration box is 50 cm in length, 25 cm in width and 25 cm in height respectively.

[0015] Preferably, the metal hose portion of the quick-connect hose is made of 316 stainless steel.

[0016] Preferably, the diameter of the quick-connect hose is The length is 1.5 meters.

[0017] Preferably, the interior of a side of the box cover close to the box body is filled with sponge filler.

[0018] Preferably, a lock for locking the portable pressure calibration box is provided on a side of the box cover away from the connection with the box body and at a position corresponding to the box body.

[0019] Preferably, a portable handle is provided on the same side of the box as the lock.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides an online verification device for a natural gas pipeline pressure gauge, which consists of a portable pressure calibration box and a quick-connect hose. The portable pressure calibration box comprises a box body and a box cover, wherein a first pressure pressurizing device and a second pressurizing device are arranged inside the box cover, wherein the first pressurizing device and the second pressurizing device are communicated with each other through a first hose and a second hose respectively, wherein a first stop valve is installed on the first hose, and a standard gauge interface, a pressure relief valve and a second stop valve are installed on the second hose in sequence; a first pressure output interface is arranged at the end of the second pressurizing device, and the second pressure output interface is connected through a third hose, wherein the first stop valve, the second stop valve, the standard gauge interface, the pressure relief valve, the first pressure output interface and the second pressure output interface are all distributed on the upper end surface of the box body; a first handle for controlling the first pressurizing device and a second handle for controlling the second pressurizing device are arranged on the side of the box body; a high-precision digital pressure transmitter is detachably mounted on the standard gauge interface; the quick-connect hose is connected to the second pressure output interface through a 1 / 4NPT interface at one end; when in use, the online pressure instrument and the portable pressure calibration box are connected through the quick-connect hose, and the first handle and the second handle are adjusted to perform pressure calibration, and the use method is simple, efficient and quick.

[0022] In particular, the second handle is a fine-tuning handle, which can fine-tune the pressure of the second pressure device to achieve accurate pressure verification.

[0023] In particular, the entire outer box of the portable pressure calibration box is made of stainless steel and is wrapped with a layer of insulating rubber on the outside to ensure the safety of the verification instrument. At the same time, it can be used in an environment where insulation is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1The utility model is a schematic diagram of the appearance of an online verification device for a natural gas pipeline pressure gauge.

[0025] Figure 2 The utility model is a schematic diagram of the connection between an online verification device for a natural gas pipeline pressure gauge and a pressure gauge to be tested.

[0026] Figure 3 The utility model discloses a schematic diagram of the internal structure of an online verification device for a natural gas pipeline pressure gauge.

[0027] Figure 4 The utility model discloses a schematic diagram of a quick-connect hose in an online verification device for a natural gas pipeline pressure gauge.

[0028] In the figure: 100- portable pressure calibration box; 101- box body; 102- box cover; 103- first pressurizing device; 104- second pressurizing device; 105- first hose; 106- second hose; 107- third hose; 108- first stop valve; 109- second stop valve; 110- standard gauge interface; 111- pressure relief valve; 112- first pressure output interface; 113- second pressure output interface; 114- first handle; 115- second handle; 116- high-precision digital pressure transmitter; 117- lock buckle; 118- portable handle; 119- sponge filler; 200- quick connect hose. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment 1:

[0031] like Figure 1 , 2As shown in Figure 3, an online verification device for a natural gas pipeline pressure gauge comprises: a portable pressure calibration box 100 and a quick-connect hose 200 connected to a second pressure output interface 113 of the portable pressure calibration box 100, the portable pressure calibration box 100 comprises a box body 101 and a box cover 102, the box cover 102 is located above the box body 101 and one side is rotatably connected to the box body 101, a first pressurizing device 103 and a second pressurizing device 104 are arranged inside the box body 101; the first pressurizing device 103 and the second pressurizing device 104 are communicated with each other through a first hose 105 and a second hose 106 respectively, a first stop valve 108 is installed on the first hose 105, the output interface of the first pressurizing device 103 is connected to the input end of the second stop valve 109; the first pressure output interface 113 of the second pressurizing device 104 is connected to the input end of the second stop valve 109; 2 is connected to the input end of the standard gauge interface 110 on the second hose 106; a pressure relief valve 111 is installed between the standard gauge interface 110 and the second stop valve 109 of the second hose 106; the first pressure output interface 112 of the second pressurizing device 104 is connected to the second pressure output interface 113 through the third hose 107, and the control modules of the first stop valve 108, the second stop valve 109, the standard gauge interface 110, the pressure relief valve 111, the first pressure output interface 112 and the second pressure output interface 113 are all distributed on the upper end surface of the box body 101; a first handle 114 for controlling the first pressurizing device 103 and a second handle 115 for controlling the second pressurizing device 104 are provided on the side of the box body 101; a high-precision digital pressure transmitter 116 is detachably installed on the standard gauge interface 110;

[0032] The quick-connect hose 200 is provided with 1 / 4 NPT interfaces at both ends, the 1 / 4 NPT interface at one end is used to connect to the second pressure output interface 113, and the other end is connected to the pressure gauge to be detected.

[0033] When in use, the online pressure instrument is quickly connected to the portable pressure calibration box 100 through the 1 / 4NPT interface at both ends of the quick-connect hose 200, the first handle 114 and the second handle 115 are adjusted to control the pressure inside the portable pressure calibration box, and the values ​​of the online pressure instrument and the high-precision digital pressure transmitter are compared to complete the accurate verification of the online pressure instrument. The whole process is easy to operate, efficient and fast.

[0034] Specifically, the first pressure output interface 112 is a 1 / 2NPT interface, and the second pressure output interface 113 is a 1 / 4NPT interface.

[0035] In some embodiments, Figure 1As shown, the first pressure output interface 112 is a 1 / 2NPT interface, which can be used to quickly connect the disassembled pressure instrument to be tested when offline pressure calibration is adopted, and the second pressure output interface 112 needs to be closed at this time; the second pressure output interface 113 is a 1 / 4NPT interface, which can be connected to the pressure instrument to be tested through a quick connection hose 200 when online pressure calibration is adopted, and the first pressure output interface 112 needs to be closed at this time. That is, when the device is working, only one pressure output interface can be connected to the pressure instrument to be tested.

[0036] Specifically, the second handle 115 is a fine-tuning handle.

[0037] In some embodiments, Figure 2 As shown, the second handle 115 is a fine-tuning handle. During the calibration of the pressure instrument being tested, when the pressure is close to the calibration point, the pressure in the device is fine-tuned by fine-tuning the second handle 115, and the calibration or verification of the instrument being tested is completed in sequence. Finally, the pressure measurement of the pressure instrument being tested is judged to be accurate based on the indications of the digital high-precision standard pressure transmitter and the pressure instrument being tested.

[0038] Specifically, the entire outer box of the portable pressure calibration box 100 is made of stainless steel, and a layer of insulating rubber is wrapped on the outside.

[0039] Specifically, the length, width and height of the portable pressure calibration box 100 are 50 cm, 25 cm and 25 cm respectively.

[0040] Specifically, the metal hose portion of the quick-connect hose 200 is made of 316 stainless steel.

[0041] Specifically, the diameter of the quick-connect hose 200 is The length is 1.5 meters.

[0042] In some embodiments, Figure 3 As shown, the metal hose portion of the quick-connect hose 200 is made of 316 stainless steel and has a diameter of The length is 1.5 meters, ensuring that the hose can withstand the pressure range of the pressure instrument being tested.

[0043] Specifically, the interior of one side of the box cover 102 close to the box body 101 is filled with a sponge filler 119 .

[0044] Specifically, a lock 117 for locking the portable pressure calibration box 100 is provided on a side of the box cover 102 away from the connection with the box body 101 and at a position corresponding to the box body 101 .

[0045] Specifically, a portable handle 118 is provided on the same side of the box body 101 as the lock buckle.

[0046] In some embodiments, Figure 1 As shown, the inside of one side of the box cover 102 close to the box body 101 is filled with a sponge filler 119. When the box cover 102 is closed, the box cover 102 is prevented from squeezing the first stop valve 108, the second stop valve 109, the standard gauge interface 110, the pressure relief valve 111, the first pressure output interface 112, the second pressure output interface 113 and the high-precision digital pressure transmitter 116, causing damage; after closing the box cover 102, it is locked with a lock 117 to ensure that the device will not be opened at will when carried, causing bumps and damage to the equipment; a portable handle 118 is provided on the same side of the box body 101 as the lock, making the device easy to carry.

[0047] Embodiment 2:

[0048] In some embodiments, the working principle of the device for implementing online pressure verification is:

[0049] First, connect the 1 / 4NPT interface at one end of the quick-connect hose 200 to the pressure instrument to be tested, and connect the other end to the second pressure output interface 113 of the portable pressure calibration box 100, close the first pressure output interface 112, the pressure relief valve 111, and the second stop valve 109, open the first stop valve 108, and manually adjust the first pressurizing device 103 through the first handle 114 to compress the air to generate pressure, observe the indication of the high-precision digital pressure transmitter 116, and when the pressure approaches the calibration point, close the first stop valve 108, and adjust the pressure of the second pressurizing device 104 by fine-tuning the second handle 115, and complete the calibration or calibration of the tested meter in turn, and finally determine whether the pressure measurement of the tested pressure gauge is accurate based on the indication of the high-precision digital pressure transmitter 116 and the tested pressure gauge; after the calibration process and calibration are completed, pressure relief is achieved by opening the second stop valve 109 and the pressure relief valve 111, and the above steps are used to achieve online verification or calibration of the tested pressure gauge.

[0050] Embodiment three:

[0051] In some embodiments, the device can also implement offline pressure verification, which works as follows:

[0052] The pressure instrument to be inspected is removed from the pipeline, connected to the first pressure output interface 112 on the device, the second pressure output interface 113, the pressure relief valve 111, and the second stop valve 109 are closed, the first stop valve 108 is opened, and the first pressurizing device 103 is manually adjusted by the first handle 114 to compress the air to generate pressure, and the indication of the high-precision digital pressure transmitter 116 is observed. When the pressure approaches the calibration point, the first stop valve 108 is closed, and the pressure of the second pressurizing device 104 is adjusted by fine-tuning the second handle 115, and the calibration or verification of the inspected gauge is completed in sequence. Finally, it is determined whether the pressure measurement of the inspected pressure gauge is accurate based on the indication of the high-precision digital pressure transmitter 116 and the inspected pressure gauge. After the calibration process and the calibration are completed, the pressure is released by opening the second stop valve 109 and the pressure relief valve 111. The above steps are used to realize the offline verification or calibration of the inspected pressure gauge.

[0053] It should be noted that the above-mentioned specific implementation methods can enable those skilled in the art to more fully understand the invention of the utility model, but do not limit the invention of the utility model in any way. Therefore, although this specification has described the invention of the utility model in detail with reference to the drawings and embodiments, those skilled in the art should understand that the invention of the utility model can still be modified or replaced by equivalents. In short, all technical solutions and improvements that do not deviate from the spirit and scope of the invention of the utility model and their improvements should be included in the protection scope of the patent of the invention of the utility model.

Claims

1. A natural gas pipeline pressure gauge online verification device, characterized in that: include: A portable pressure calibration box (100) and a quick-connect hose (200) connected to a second pressure output interface (113) of the portable pressure calibration box (100); The portable pressure calibration box (100) comprises a box body (101) and a box cover (102), wherein the box cover (102) is located above the box body (101) and one side of the box cover (102) is rotatably connected to the box body (101), and a first pressurizing device (103) and a second pressurizing device (104) are provided inside the box body (101); the first pressurizing device (103) and the second pressurizing device (104) are connected via a first hose (105) and a second hose (106) respectively, and a first stop valve (108) is installed on the first hose (105); the output interface of the first pressurizing device (103) is connected to the input end of the second stop valve (109); the first pressure output interface (112) of the second pressurizing device (104) is connected to the input end of the standard gauge interface (110) on the second hose (106); ) and the second stop valve (109); a pressure relief valve (111) is installed between the standard gauge interface (110) and the second stop valve (109); the first pressure output interface (112) of the second pressurizing device (104) is connected to the second pressure output interface (113) through a third hose (107); control modules of the first stop valve (108), the second stop valve (109), the standard gauge interface (110), the pressure relief valve (111), the first pressure output interface (112) and the second pressure output interface (113) are all distributed on the upper end surface of the box body (101); a first handle (114) for controlling the first pressurizing device (103) and a second handle (115) for controlling the second pressurizing device (104) are provided on the side surface of the box body (101); a high-precision digital pressure transmitter (116) is detachably installed on the standard gauge interface (110); The two ends of the quick-connect hose (200) are respectively provided with 1 / 4NPT interfaces, the 1 / 4NPT interface at one end is used to connect to the second pressure output interface (113), and the other end is connected to the pressure gauge to be detected.

2. The on-line verification device for a natural gas pipeline pressure gauge according to claim 1 is characterized in that: The first pressure output interface (112) is a 1 / 2NPT interface, and the second pressure output interface (113) is a 1 / 4NPT interface.

3. The on-line verification device for a natural gas pipeline pressure gauge according to claim 1 is characterized in that: The second handle (115) is a fine-tuning handle.

4. The on-line verification device for a natural gas pipeline pressure gauge according to claim 1 is characterized in that: The entire outer box of the portable pressure calibration box (100) is made of stainless steel, and the outer side is wrapped with a layer of insulating rubber.

5. The on-line verification device for a natural gas pipeline pressure gauge according to claim 1 is characterized in that: The portable pressure calibration box (100) has a length, a width and a height of 50 cm, 25 cm and 25 cm respectively.

6. The on-line verification device for a natural gas pipeline pressure gauge according to claim 1 is characterized in that: The metal hose portion of the quick-connect hose (200) is made of 316 stainless steel.

7. The on-line verification device for a natural gas pipeline pressure gauge according to claim 1 is characterized in that: The diameter of the quick-connect hose (200) is The length is 1.5 meters.

8. A natural gas pipeline pressure gauge online verification device according to any one of claims 1 to 7, characterized in that: The interior of a side of the box cover (102) close to the box body (101) is filled with a sponge filler (119).

9. The on-line verification device for a natural gas pipeline pressure gauge according to claim 8, characterized in that: A lock buckle (117) for locking the portable pressure calibration box (100) is provided on a side of the box cover (102) away from the connection with the box body (101) and at a position corresponding to the box body (101).

10. The on-line verification device for a natural gas pipeline pressure gauge according to claim 9, characterized in that: A portable handle (118) is provided on the box body (101) on the same side as the lock buckle.

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