Safety explosion-proof pressure monitoring device for oil and gas pipeline under pressure

Abstract

The utility model relates to the technical field of pipeline pressure tapping devices, in particular to a pressure oil and gas pipeline safety anti-explosion pressure monitoring device which comprises a conveying pipeline, a fixing pipe fixedly inserted into the top of the conveying pipeline, an electromagnetic valve arranged in the fixing pipe, a connecting pipe movably inserted into the fixing pipe, and a detection pipe welded to the top of the connecting pipe. A first piston is slidably arranged in the connecting pipe, and the top of the first piston is connected with a limiting block; when the oil pressure is detected and the connecting pipe and the detection pipe are taken down from the fixed pipe, the threaded screw rod can be rotated by starting the motor, so that the L-shaped piece drives the first piston to move in the connecting pipe and pushes oil to be discharged out of the electromagnetic valve again, the first piston abuts against the electromagnetic valve, and then the electromagnetic valve is closed; the oil liquid in the connecting pipe can be emptied after the oil liquid is discharged, and then the connecting pipe is taken out from the fixed pipe, so that the problem that the hands of personnel are easily corroded due to residual oil liquid in the connecting pipe can be avoided, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline pressure taking devices, in particular to a safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines. Background Art

[0002] In my country's petrochemical industry, it is often necessary to measure the pressure of gas, liquid or colloid transported in pipelines. However, since the gas, liquid or colloid in the above fields are mostly corrosive, the use of traditional pressure gauges for direct measurement will not only easily cause the above-mentioned objects to corrode the pressure gauge, shorten the life of the pressure gauge, and affect the accuracy of the pressure gauge, but also easily cause the objects to overflow. Therefore, there is an oil and gas pipeline safety explosion-proof pressure monitoring device with a corrosion-free detector.

[0003] After checking, the publication (announcement) number: CN203443730U discloses a safe pressure-taking device for oil field production. This technology discloses that "when measuring, the solenoid valve is opened, the object to be measured enters the second pipeline, and the second piston is squeezed. Because the groove at the end of the raised part of the second piston is mortised with the raised part of the first piston, the second piston transmits the pressure of the object to be measured to the first piston. The first piston is pressed and retreats along the first pipeline, squeezing the liquid medium. The liquid medium transmits the pressure to the pressure gauge, and the pressure degree is displayed on the pressure gauge and read by the staff. When the measurement is completed, the solenoid valve is closed, and the second pipeline is removed from the pipeline for transporting the object to be measured."

[0004] The existing oilfield production safety pressure-taking device still has some shortcomings when in use. Although the oilfield production safety pressure-taking device can prevent the oil from directly contacting the detector, it is unable to discharge the oil in the second pipeline. Since the pipeline for conveying the oil will generate a push when pushing the oil into the second pipeline, it is impossible for the oil to flow directly back into the conveying pipeline. As a result, after the second pipeline is taken out, the oil inside it will seep out, which may corrode the hands of personnel.

[0005] In order to solve the above problems, the present application proposes a safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines. Utility Model Content

[0006] To solve the problems raised in the above background technology, the utility model provides a safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines, which can detect the pressure of the oil without contacting the oil, and can conveniently push the oil out again to avoid leakage and corrosion of personnel's hands.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a safety explosion-proof pressure monitoring device for a pressurized oil and gas pipeline, comprising a delivery pipeline, a fixed pipe fixedly plugged at the top of the delivery pipeline, a solenoid valve arranged in the fixed pipe, a connecting pipe movably plugged in the fixed pipe, a detection pipe welded on the top of the connecting pipe, a first piston slidably arranged in the connecting pipe, a limiting block connected to the top of the limiting block, a connecting rod arranged on the top of the limiting block, a second piston arranged on the top of the connecting rod, the second piston slidably connected in the connecting pipe, a pressure sensor fixedly installed in the detection pipe, the second piston and the pressure sensor cooperate to abut against each other, and also comprising a driving component arranged in the limiting block, used to drive the first piston to push the oil in the connecting pipe into the second piston;

[0008] The driving assembly includes a threaded screw, which is rotatably arranged in a limit block, a nut is threadedly sleeved on the threaded screw, an L-shaped piece is fixedly installed on one side of the nut, the other end of the L-shaped piece slides through the limit block and is fixedly connected to the first piston, a motor is embedded in the limit block, and a driving shaft of the motor is fixedly connected to one end of the threaded screw.

[0009] As a preferred embodiment of the safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines of the utility model, a battery is embedded in the limit block, and the battery is electrically connected to the motor to provide power for the motor and the display touch screen, thereby ensuring the normal operation of the motor and the display touch screen.

[0010] As a preferred embodiment of the utility model of the safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines, the interior and bottom of the limit block are respectively provided with a cavity and a fixed opening, the cavity and the fixed opening are connected, the threaded screw is rotatably connected in the cavity, and the L-shaped part is slidably inserted in the fixed opening.

[0011] As a preferred embodiment of the safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines of the utility model, the inner ring of the fixed pipe is provided with an internal thread, and the outer surface of the connecting pipe is provided with an external thread. The connecting pipe is inserted into the internal thread through the external thread. When the connecting pipe needs to be removed from the fixed pipe, the connecting pipe is rotated to drive the external thread to rotate out of the internal thread, so that the connecting pipe can be conveniently removed from the fixed pipe.

[0012] As a preferred embodiment of the safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines of the utility model, a positioning tube is fixedly sleeved on the connecting pipe, a sealing ring is provided at the bottom of the positioning tube, and the sealing ring is abutted against the top of the fixed pipe. By providing the sealing ring, the sealing between the connecting pipe and the fixed pipe can be ensured.

[0013] As a preferred embodiment of the safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines of the utility model, a display touch screen is provided on the front side of the detection tube, and the pressure value can be reflected on the display touch screen, so as to facilitate personnel observation. The display touch screen is electrically connected to the battery and the motor, and a one-way water inlet valve is provided on one side of the detection tube for injecting liquid.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. On this basis, a drive component is added. When the oil pressure test is completed and the connecting pipe and the detection pipe are removed from the fixed pipe, the motor can be turned on to rotate the screw rod, so that the L-shaped part drives the first piston to move in the connecting pipe and push the oil out of the solenoid valve again and make the first piston and the solenoid valve collide. Then close the solenoid valve to drain the oil in the connecting pipe, and then take the connecting pipe out of the fixed pipe. This can avoid the problem of corroding the hands of personnel due to residual oil in the connecting pipe, thereby improving safety.

[0016] 2. At the same time, by rotating the connecting tube, the connecting tube can drive the external thread to rotate out of the internal thread, so that the connecting tube can be easily removed from the fixed tube. By setting a sealing ring, the sealing between the connecting tube and the fixed tube can be ensured. By setting a battery, electric energy can be provided for the motor and the display touch screen, thereby ensuring the normal operation of the motor and the display touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the interior of the fixed pipe and the connecting pipe of the utility model in a half-section view;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the interior of the detection tube of the utility model in a half-section view;

[0021] Figure 4 For this utility model Figure 1 Enlarged view of point A in the middle.

[0022] In the figure:

[0023] 1. Conveying pipeline; 2. Fixed pipe; 3. Solenoid valve; 4. Connecting pipe; 5. Detection tube; 6. First piston; 7. Connecting rod; 8. Second piston; 9. Pressure sensor; 10. Threaded screw; 11. Nut; 12. L-shaped piece; 13. Motor; 14. Battery; 15. Cavity; 16. Fixed port; 17. Internal thread; 18. External thread; 19. Sealing ring; 20. Positioning cylinder; 21. One-way water inlet valve; 22. Display touch screen; 23. Limit block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-Figure 4 As shown;

[0026] The invention discloses a safety explosion-proof pressure monitoring device for a pressurized oil and gas pipeline, comprising a conveying pipeline 1, a fixed pipe 2 is fixedly inserted at the top of the conveying pipeline 1, a solenoid valve 3 is arranged in the fixed pipe 2, a connecting pipe 4 is movably inserted in the fixed pipe 2, a detection pipe 5 is welded on the top of the connecting pipe 4, a first piston 6 is slidably arranged in the connecting pipe 4, a limiting block 23 is connected to the top of the first piston 6, a connecting rod 7 is arranged on the top of the limiting block 23, a second piston 8 is arranged on the top of the connecting rod 7, the second piston 8 is slidably connected in the connecting pipe 4, a pressure sensor 9 is fixedly installed in the detection pipe 5, and the second piston 8 cooperates with the pressure sensor 9 to abut against each other.

[0027] In this embodiment: after checking the public (announcement) number: CN203443730U discloses a safe pressure-taking device for oil field production. This technology discloses that "when measuring, the solenoid valve is opened, the object to be measured enters the second pipeline, and the second piston is squeezed. Because the groove at the end of the raised part of the second piston is mortised with the raised part of the first piston, the second piston transmits the pressure of the object to be measured to the first piston. The first piston is pressed and retreats along the first pipeline, squeezing the liquid medium. The liquid medium transmits the pressure to the pressure gauge, and the pressure degree is displayed on the pressure gauge and read by the staff. When the measurement is completed, the solenoid valve is closed, and the second pipeline is removed from the pipeline for transporting the object to be measured";

[0028] Although the existing oil field production safety pressure-taking device can prevent the oil from directly contacting the detector, it is unable to discharge the oil in the second pipeline, because the pipeline for conveying the oil will generate a push when pushing the oil into the second pipeline, making it impossible for the oil to flow directly back into the conveying pipe. This means that after the second pipeline is taken out, the oil inside it will seep out, which may corrode the hands of personnel. In terms of actual use, this problem is obviously a real problem that exists and is difficult to solve. Therefore, in order to solve this technical problem, a drive component is added to the present application document.

[0029] According to the above content, in order to avoid the problem of residual oil leaking out and corroding the hands of personnel when disassembling the connecting pipe 4, a driving component is also included in the limit block 23, which is used to drive the first piston 6 to push the oil in the connecting pipe 4 into the second piston 8;

[0030] The driving assembly includes a threaded screw 10, which is rotatably arranged in a limit block 23. A nut 11 is threadedly sleeved on the threaded screw 10, and an L-shaped piece 12 is fixedly installed on one side of the nut 11. The other end of the L-shaped piece 12 slides through the limit block 23 and is fixedly connected to the first piston 6. A motor 13 is embedded in the limit block 23, and the driving shaft of the motor 13 is fixedly connected to one end of the threaded screw 10. A cavity 15 and a fixed port 16 are respectively provided inside and at the bottom of the limit block 23. The cavity 15 and the fixed port 16 are communicated with each other. The threaded screw 10 is rotatably connected in the cavity 15, and the L-shaped piece 12 is slidably inserted in the fixed port 16.

[0031] In this embodiment: when it is necessary to detect the pressure of the oil transported in the delivery pipeline 1, the solenoid valve 3 is first opened to allow the oil to be injected into the connecting pipe 4. Subsequently, the oil pushes the first piston 6, the limit block 23, the connecting rod 7 and the liquid upward due to the pressure until the liquid pushes the pressure sensor 9 and generates a pressure value. The oil pressure can be detected without contacting the pressure sensor 9. When it is necessary to remove the connecting pipe 4 and the detection tube 5 from the fixed tube 2, the motor 13 is turned on to rotate the threaded screw 10 so that the L-shaped member 12 drives the first piston 6 to move in the connecting pipe 4 and push the oil to be discharged out of the solenoid valve 3 again until the first piston 6 is against the solenoid valve 3. Then the solenoid valve 3 is closed to drain the oil in the connecting pipe 4. Then the connecting pipe 4 is removed from the fixed tube 2. The problem of corrosion of personnel's hands due to residual oil in the connecting pipe 4 can be avoided, thereby improving safety.

[0032] In an optional embodiment: a battery 14 is embedded in the limiting block 23 , and the battery 14 is electrically connected to the motor 13 .

[0033] In this embodiment, the storage battery 14 is provided to provide electric energy for the motor 13 and the display touch screen 22 , thereby ensuring the normal operation of the motor 13 and the display touch screen 22 .

[0034] In an optional embodiment: the inner circle of the fixing pipe 2 is provided with an internal thread 17 , the outer surface of the connecting pipe 4 is provided with an external thread 18 , and the connecting pipe 4 is threadably inserted into the internal thread 17 via the external thread 18 .

[0035] In this embodiment: based on the above implementation, when the connecting tube 4 needs to be removed from the fixed tube 2, the connecting tube 4 is rotated so that the connecting tube 4 can drive the external thread 18 to screw out of the internal thread 17, so that the connecting tube 4 can be easily removed from the fixed tube 2.

[0036] In an optional embodiment: a positioning tube 20 is fixedly sleeved on the connecting tube 4 , a sealing ring 19 is provided at the bottom of the positioning tube 20 , and the sealing ring 19 abuts against the top of the fixed tube 2 .

[0037] In this embodiment, the sealing ring 19 is provided to ensure the sealing between the connecting pipe 4 and the fixing pipe 2 .

[0038] According to the above content, a display touch screen 22 is provided on the front side of the detection tube 5, and the display touch screen 22 is electrically connected to the battery 14 and the motor 13. A one-way water inlet valve 21 is provided on one side of the detection tube 5 for injecting liquid.

[0039] In this embodiment, the pressure value can be reflected on the display touch screen 22, so as to facilitate observation by personnel.

[0040] The pressure sensor 9 is usually provided with a pressure detection chip and circuits inside. When pressure is applied to the pressure sensor 9, the pressure detection chip will display the corresponding pressure value and send an electrical signal to the connected electrical appliance. Since the pressure sensor 9 is a prior art, it will not be described in detail in this manual.

[0041] In addition, the one-way water inlet valve 21 is usually composed of a valve body, a valve cover, a valve seat and a valve disc. When the fluid flows into the one-way valve from the inlet and under the action of positive pressure, the one-way valve will open to allow the fluid to pass smoothly. However, when the fluid is subjected to reverse pressure, the one-way valve will close to effectively prevent the backflow of the fluid. Since the one-way water inlet valve 21 is a prior art, it will not be explained in detail in this specification.

[0042] The working principle and use process of the utility model are as follows: when it is necessary to detect the pressure of the oil transported in the delivery pipeline 1, first open the solenoid valve 3 to allow the oil to be injected into the connecting pipe 4, and then the oil pushes the first piston 6, the limit block 23, the connecting rod 7 and the liquid upward due to the pressure, until the liquid pushes the pressure sensor 9 and generates a pressure value, so that the oil pressure can be detected without contacting the pressure sensor 9. When it is necessary to remove the connecting pipe 4 and the detection pipe 5 from the fixed pipe 2, turn on the motor 13 to rotate the threaded screw 10, so that the L-shaped member 12 drives the first piston 6, the limit block 23, the connecting rod 7 and the liquid to move upward. The first piston 6 moves in the connecting pipe 4 and pushes the oil to be discharged out of the solenoid valve 3 again until the first piston 6 is in contact with the solenoid valve 3, and then the solenoid valve 3 is closed to drain the oil in the connecting pipe 4. Then the connecting pipe 4 is rotated to drive the external thread 18 to screw out of the internal thread 17, so that the connecting pipe 4 can be easily removed from the fixed pipe 2. At this time, the problem of corrosion of personnel's hands due to residual oil in the connecting pipe 4 can be avoided, thereby improving safety. By setting the sealing ring 19, the sealing between the connecting pipe 4 and the fixed pipe 2 can be guaranteed.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A safety explosion-proof pressure monitoring device for a pressurized oil and gas pipeline, comprising a delivery pipeline (1), a fixed pipe (2) fixedly plugged into the top of the delivery pipeline (1), a solenoid valve (3) arranged in the fixed pipe (2), a connecting pipe (4) movably plugged into the fixed pipe (2), a detection pipe (5) welded to the top of the connecting pipe (4), a first piston (6) slidably arranged in the connecting pipe (4), a limit block (23) connected to the top of the first piston (6), a connecting rod (7) arranged on the top of the limit block (23), a second piston (8) arranged on the top of the connecting rod (7), the second piston (8) slidably connected in the connecting pipe (4), a pressure sensor (9) fixedly installed in the detection pipe (5), the second piston (8) and the pressure sensor (9) cooperate and abut against each other, characterized in that: It also includes a driving assembly arranged in the limit block (23) and used for driving the first piston (6) to push the oil in the connecting pipe (4) into the second piston (8); The driving assembly comprises a threaded screw (10), wherein the threaded screw (10) is rotatably arranged in a limit block (23), a nut (11) is threadedly sleeved on the threaded screw (10), an L-shaped piece (12) is fixedly mounted on one side of the nut (11), the other end of the L-shaped piece (12) slides through the limit block (23) and is fixedly connected to the first piston (6), a motor (13) is embedded in the limit block (23), and a driving shaft of the motor (13) is fixedly connected to one end of the threaded screw (10).

2. The safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines according to claim 1 is characterized in that: A storage battery (14) is embedded in the limit block (23), and the storage battery (14) is electrically connected to the motor (13).

3. The safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines according to claim 1 is characterized in that: A cavity (15) and a fixing opening (16) are respectively provided inside and at the bottom of the limit block (23); the cavity (15) and the fixing opening (16) are communicated with each other; the threaded screw (10) is rotatably connected in the cavity (15); and the L-shaped member (12) is slidably inserted in the fixing opening (16).

4. The safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines according to claim 1 is characterized in that: The inner circle of the fixed tube (2) is provided with an internal thread (17), the outer surface of the connecting tube (4) is provided with an external thread (18), and the connecting tube (4) is threadably inserted into the internal thread (17) via the external thread (18).

5. The safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines according to claim 1 is characterized in that: A positioning tube (20) is fixedly sleeved on the connecting tube (4), a sealing ring (19) is provided at the bottom of the positioning tube (20), and the sealing ring (19) abuts against the top of the fixed tube (2).

6. The safety explosion-proof pressure monitoring device for pressurized oil and gas pipelines according to claim 2 is characterized in that: A display touch screen (22) is provided on the front side of the detection tube (5), and the display touch screen (22) is electrically connected to the battery (14) and the motor (13). A one-way water inlet valve (21) is provided on one side of the detection tube (5) for injecting liquid.

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