Safety detection device for fluid pipeline under pressure

Abstract

The utility model relates to the technical field of pipeline safety detection, in particular to an under-pressure fluid pipeline safety detection device which comprises an under-pressure fluid pipeline body, a connecting flange fixedly connected to the top end of the inner side of the under-pressure fluid pipeline body, a fastening bolt spirally connected to the interior of the connecting flange, and a front detection shell in contact with the outer side of the front end of the connecting flange. The outer side of the rear end of the connecting flange is in contact with a rear detection shell; detection bins are formed in the inner sides of the front detection shell and the rear detection shell; through design cooperation of the front detection shell and the rear detection shell, the device can collect pressurized gas leaked between the connecting flanges, the gas concentration in the detection bins on the inner sides of the front detection shell and the rear detection shell is detected in real time through the detection head, and an operator remotely observes the gas concentration in the detection bins, so that the detection efficiency is improved. The situation that whether the pressurized fluid pipeline body leaks air or not is observed in a close range, and the safety of detection of the pressurized fluid pipeline body is reduced to a certain degree is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline safety detection, in particular to a safety detection device for a pressurized fluid pipeline. Background Technique

[0002] A pressurized fluid pipeline generally refers to a pipeline system containing a certain pressure inside under normal working conditions, which is mainly used to transport various fluids, such as water, oil, gas, etc.

[0003] These pipelines generally have the following characteristics: pressure existence: the fluid in the pipeline has a certain pressure due to the action of external or pump pressure, and this pressure may be constant or variable; material requirements: due to the pressure inside the pipeline, the pipeline and its connecting components need to be made of materials that can withstand the corresponding pressure and comply with relevant safety standards; safety measures: in order to ensure safety, a pressurized fluid pipeline system usually is equipped with safety devices such as safety valves, rupture discs, pressure gauges, etc. to prevent danger caused by excessive pressure; wide application: pressurized fluid pipelines are widely used in industrial, civil and public facilities, such as industries like petroleum, chemical industry, water supply, heating, gas transmission, etc.

[0004] When in use currently, flange plates are usually installed at the joints of pipelines to increase different pipelines and extend the pipeline length. However, after long-term use, especially when there is pressure inside the pipeline, under the long-term influence of the internal fluid pressure and the external environment, the sealing material at the joint may wear, age or be damaged, resulting in leakage of the gas contained in the fluid. Especially when transporting liquefied gas, the gas contains flammable components. Therefore, pipeline maintenance generally involves manually holding a detector to detect the pipeline to observe whether there is air leakage. When the operator holds the detector to detect the pipeline, if the flange plate leaks due to aging or other reasons, then the operator is very likely to be in the range of gas leakage, with relatively high danger.

[0005] To solve the above problems, a safety detection device for a pressurized fluid pipeline is proposed in this application. Content of the Utility Model

[0006] To solve the problems raised in the above background technique. The utility model provides a safety detection device for a pressurized fluid pipeline, which can not only remotely observe whether there is air leakage at the joint of the pressurized fluid pipeline, but also has the characteristics of positioning and limiting the front detection shell and the rear detection shell.

[0007] To achieve the above object, the utility model adopts the following technical solutions: a pressure-bearing fluid pipeline safety detection device, including a pressure-bearing fluid pipeline body, a connecting flange is fixedly connected to the inner top end of the pressure-bearing fluid pipeline body, a fastening bolt is screwed inside the connecting flange, a front detection shell is in contact with the outer side of the front end of the connecting flange, a rear detection shell is in contact with the outer side of the rear end of the connecting flange, detection chambers are opened inside both the front detection shell and the rear detection shell, splicing plates are in contact with the upper and lower sides of the left and right end faces of the front detection shell and the rear detection shell, screws are screwed inside the front and rear sides of the splicing plates, a detection head is fixedly connected to the middle of the front side inside the front detection shell, a connecting wire is fixedly connected to the output end of the detection head, a gas detector is fixedly connected to the end of the connecting wire away from the detection head, and a wire arranging hole is opened in the middle of the front side inside the front detection shell.

[0008] As a preferred embodiment of the pressure-bearing fluid pipeline safety detection device of the utility model, the upper and lower sides of the rear of the front detection shell and the upper and lower sides of the front of the rear detection shell are all screwed with screws, and the middle of the front side inside the front detection shell is in contact with the outer side of the end of the connecting wire close to the detection head, which can collect the pressure-bearing gas leaked between the connecting flanges, and the gas concentration in the detection chambers inside the front detection shell and the rear detection shell is detected in real time through the detection head, and the data is transmitted to the gas detector through the connecting wire.

[0009] As a preferred embodiment of the pressure-bearing fluid pipeline safety detection device of the utility model, the front detection shell and the rear detection shell are fixed at the outer side center position of two connecting flanges fixed together by fastening bolts, the overall shape of the detection chambers inside the front detection shell and the rear detection shell is annular, and the detection chambers at the top of the rear side of the front detection shell and the detection chambers at the top of the front side of the rear detection shell communicate with each other. No matter where gas leakage occurs between the connecting flanges, it can be detected by the detection head without detection dead angles.

[0010] As a preferred embodiment of the pressure-bearing fluid pipeline safety detection device of the utility model, the number of the splicing plates is four, and the splicing plates are distributed at the upper left and right ends and the lower left and right ends of the front detection shell and the rear detection shell. Through holes are opened in the front and rear sides inside the splicing plates, the left and right sides of the rear of the front detection shell and the left and right sides of the front of the rear detection shell, and the diameter of the through holes matches the longitudinal section diameter of the screws, so that the front detection shell and the rear detection shell can be installed at the outer connection position of the connecting flange through the splicing plates and the screws.

[0011] As a preferred embodiment of the pressure-bearing fluid pipeline safety detection device of the utility model, the detection head is located at the front inner wall position of the detection chamber inside the front detection shell, and the diameter of the wire arranging hole in the middle of the front side inside the front detection shell matches the longitudinal section diameter of the connecting wire, for the connecting wire to pass through the wire arranging hole in the front side inside the front detection shell to transmit the data detected by the detection head to the gas detector.

[0012] Preferably, for the pressure-bearing fluid pipeline safety detection device of the present utility model, connecting rods are fixedly connected to the left and right end faces of the front detection shell and the rear detection shell. One end of the connecting rod away from the front detection shell and the rear detection shell is fixedly connected with a positioning plate. A rubber layer is fixedly connected to the inner side of the positioning plate. The inner side of the rubber layer contacts the outer side of the fastening bolt, which can quickly position the front detection shell and the rear detection shell during installation. The outer side of the fastening bolt on the outer side of the connecting flange is clamped by the inner side of the positioning plate.

[0013] Preferably, for the pressure-bearing fluid pipeline safety detection device of the present utility model, the connecting rods and the positioning plates are integrally and evenly distributed in a circular shape on the left and right end faces of the front detection shell and the rear detection shell. The longitudinal section shape of the positioning plate is semi-circular, and the inner diameter of the positioning plate matches the longitudinal section diameter of the head of the fastening bolt. The thickness of the rubber layer is 1 mm. It not only reduces the probability of the front detection shell and the rear detection shell being easily separated when installing the splicing plate, but also restricts the positions of the front detection shell and the rear detection shell after the front detection shell and the rear detection shell are installed.

[0014] The present utility model has the following beneficial effects:

[0015] For the pressure-bearing fluid pipeline safety detection device designed by the present utility model, through the design cooperation of the front detection shell and the rear detection shell, the device can collect the pressure-bearing gas leaking between the connecting flanges, and detect the gas concentration in the detection chamber inside the front detection shell and the rear detection shell in real time through the detection head, and transmit the data to the gas detector through the connecting wire. The operator remotely observes the gas concentration in the detection chamber, avoiding the situation of closely observing whether there is air leakage in the pressure-bearing fluid pipeline body, which reduces the safety of detecting the pressure-bearing fluid pipeline body to a certain extent. The operator can judge whether to maintain the connecting flange according to the gas concentration in the detection chamber, and can react before large-scale leakage occurs between the connecting flanges, which is suitable for popularization and use.

[0016] For the pressure-bearing fluid pipeline safety detection device designed by the present utility model, through the design cooperation of the connecting rod and the positioning plate, the device can quickly position the front detection shell and the rear detection shell during installation. The outer side of the fastening bolt on the outer side of the connecting flange is clamped by the inner side of the positioning plate. It not only reduces the probability of the front detection shell and the rear detection shell being easily separated when installing the splicing plate, but also restricts the positions of the front detection shell and the rear detection shell after the front detection shell and the rear detection shell are installed, avoiding operations such as lateral sliding and rotation of the front detection shell and the rear detection shell, and improving the stability of the front detection shell and the rear detection shell on the outer side of the connecting flange. Description of the Drawings

[0017] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the description. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the accompanying drawings:

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

[0019] Figure 2 is a schematic diagram of the exploded structure of the front detection shell and the rear detection shell of the present utility model;

[0020] Figure 3 is a schematic diagram of the longitudinal sectional structure of the front detection shell of the present utility model;

[0021] Figure 4 is a schematic diagram of the overall structure of the positioning plate of the present utility model.

[0022] Legend:

[0023] 1. Pressure-bearing fluid pipeline body; 2. Connecting flange; 3. Fastening bolt; 4. Front detection shell; 5. Rear detection shell; 6. Splicing plate; 7. Screw; 8. Connecting wire; 9. Gas detector; 10. Link rod; 11. Positioning plate; 12. Detection chamber; 13. Wiring hole; 14. Detection head; 15. Rubber layer. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] As Figures 1 to 4 shown;

[0027] The pressure-bearing fluid pipeline safety detection device includes a pressure-bearing fluid pipeline body 1.

[0028] In this embodiment: As disclosed in the background art above, "when in use, a flange is usually installed at the connection of the pipeline to increase the connection of different pipelines and extend the pipeline length. However, after long-term use of the flange, especially when there is pressure in the pipeline, under the long-term influence of the internal fluid pressure and the external environment, the sealing material at the connection may wear, age or be damaged, resulting in leakage of the gas contained in the fluid. Especially when transporting liquefied gas, the gas contains flammable components. Therefore, pipeline maintenance generally requires manual operation with a detector to detect the pipeline to observe whether there is air leakage. When the operator holds the detector to detect the pipeline, if the flange leaks due to aging or other reasons, the operator is easily within the range of gas leakage, and the risk is relatively high." In combination with the use, this problem is obviously an existing and difficult-to-solve problem. In view of this, to solve this technical problem, a front detection shell 4 and a rear detection shell 5 are added to this application document;

[0029] Furthermore:

[0030] As Figures 1 to 4 shown:

[0031] Combined with the above content: A pressure-bearing fluid pipeline safety detection device includes a pressure-bearing fluid pipeline body 1. A connecting flange 2 is welded and connected to the inner top end of the pressure-bearing fluid pipeline body 1. The connecting flange 2 is penetrated and screwed by a fastening bolt 3. The outer front side of the connecting flange 2 contacts the front detection shell 4, and the outer rear side of the connecting flange 2 contacts the rear detection shell 5. Detection chambers 12 are opened on the inner sides of the front detection shell 4 and the rear detection shell 5. The upper and lower sides of the left and right end faces of the front detection shell 4 and the rear detection shell 5 are in contact with splicing plates 6. The front and rear sides of the splicing plates 6 are penetrated and screwed by screws 7. A detection head 14 is fixed in the middle of the front side inside the front detection shell 4 by bolts. A connecting wire 8 is arranged at the output end of the detection head 14. A gas detector 9 is arranged at one end of the connecting wire 8 away from the detection head 14. A wire arranging hole 13 is opened in the middle of the front side inside the front detection shell 4. The upper and lower sides at the rear of the detection shell and the upper and lower sides at the front of the rear detection shell 5 are screwed to the screws 7. The middle of the front side inside the front detection shell 4 is in contact with the outer side of one end of the connecting wire 8 close to the detection head 14.

[0032] In this embodiment: It can collect the pressure-bearing gas leaking between the connecting flanges 2, and detect the gas concentration in the detection chamber 12 inside the front detection shell 4 and the rear detection shell 5 in real time through the detection head 14, and transmit the data to the gas detector 9 through the connecting wire 8.

[0033] In an optional embodiment: The front detection shell 4 and the rear detection shell 5 are fixed at the outer center position of two connecting flanges 2 fixed together by fastening bolts 3. The overall shape of the detection chambers 12 inside the front detection shell 4 and the rear detection shell 5 is annular, and the detection chambers 12 at the top rear of the front detection shell 4 and the detection chambers 12 at the top front of the rear detection shell 5 communicate with each other.

[0034] In this embodiment: No matter where gas leakage occurs between the connecting flanges 2, it can be detected by the detection head 14, and there is no detection dead angle.

[0035] In an alternative embodiment: The number of splicing plates 6 is four, and the splicing plates 6 are distributed at the upper left and right ends and the lower left and right ends of the front detection shell 4 and the rear detection shell 5. Through-type reserved holes are provided on the front and rear sides inside the splicing plate 6, the left and right sides at the rear inside the front detection shell 4, and the left and right sides at the front inside the rear detection shell 5, and the diameter of the through-type reserved hole matches the longitudinal section diameter of the screw 7.

[0036] In this embodiment: The front detection shell 4 and the rear detection shell 5 can be installed at the outer connection position of the connecting flange 2 through the splicing plate 6 and the screw 7.

[0037] In an alternative embodiment: The detection head 14 is located at the front inner wall position of the detection chamber 12 inside the front detection shell 4, and the diameter of the wire arrangement hole 13 in the middle of the front side inside the front detection shell 4 matches the longitudinal section diameter of the connecting wire 8.

[0038] In this embodiment: The connecting wire 8 is allowed to pass through the wire arrangement hole 13 on the front side inside the front detection shell 4 to transmit the data detected by the detection head 14 to the gas detector 9.

[0039] According to the above content, in order to position and limit the front detection shell 4 and the rear detection shell 5, connecting rods 10 are welded to the left and right end faces of the front detection shell 4 and the rear detection shell 5. A positioning plate 11 is welded to the end of the connecting rod 10 away from the front detection shell 4 and the rear detection shell 5. A rubber layer 15 is adhesively connected to the inner side of the positioning plate 11, and the inner side of the rubber layer 15 contacts the outer side of the fastening bolt 3.

[0040] In this implementation scheme: It is possible to quickly position the front detection shell 4 and the rear detection shell 5 during installation, and the inner side of the positioning plate 11 clamps the outer side of the fastening bolt 3 on the outer side of the connecting flange 2.

[0041] In an alternative embodiment: The connecting rods 10 and the positioning plates 11 are integrally and evenly distributed on the left and right end faces of the front detection shell 4 and the rear detection shell 5. The longitudinal section shape of the positioning plate 11 is semi-circular, and the inner diameter of the positioning plate 11 matches the longitudinal section diameter of the head of the fastening bolt 3. The thickness of the rubber layer 15 is 1 millimeter.

[0042] In this embodiment: It not only reduces the probability that the front detection shell 4 and the rear detection shell 5 are likely to become detached when installing the splicing plate 6, but also can limit the positions of the front detection shell 4 and the rear detection shell 5 after the front detection shell 4 and the rear detection shell 5 are installed.

[0043] The working principle and use process of the utility model are as follows: before installation, the connecting wire 8 is passed through the wire arrangement hole 13 in the middle of the front side of the front detection shell 4, and then the detection head 14 is connected to the connecting wire 8 passing through the wire arrangement hole 13. At this time, the detection head 14 and the connecting wire 8 are installed. Then, the front detection shell 4 and the rear detection shell 5 are simultaneously sleeved on the outside between the two groups of connecting flanges 2 at the top of the inner side of the pressurized fluid pipeline body 1. The inner sides of the front detection shell 4 and the rear detection shell 5 are in contact with the outer sides of the connecting flanges 2, and the connecting rods 10 at the left and right ends of the front detection shell 4 and the rear detection shell 5 drive the positioning plate 11 and the rubber layer 15 to be sleeved on the outer side of the head of the fastening bolt 3 fixed inside the connecting flange 2. At this time, the operator loosens the front detection shell 4 and the rear detection shell 5. The front detection shell 4 and the rear detection shell 5 also temporarily stay on the outer side of the connecting flange 2 because the rubber layer 15 is stuck on the outer side of the fastening bolt 3, and cannot be pulled out without external force. Let it detach from the outside of the connecting flange 2. At this time, take out the four splicing plates 6, align the through-type reserved holes inside the splicing plates 6 with the through-type reserved holes opened inside the front detection shell 4 and the rear detection shell 5, insert the screws 7 into the through-type reserved holes and tighten them. At this time, the front detection shell 4 and the rear detection shell 5 are installed. Turn on the detection head 14 to detect in real time whether there is any leakage in the connecting flange 2. If there is a leakage, the gas will spray out from between the connecting flanges 2, but will be stored in the detection chamber 12 inside the front detection shell 4 and the rear detection shell 5. The gas circulates in the detection chamber 12 and will be detected by the detection head 14. The concentration of the gas leakage will be transmitted to the gas detector 9 through the connecting line 8. The operator can judge whether to maintain the connecting flange 2 based on the gas concentration in the detection chamber 12, and can react before a large-scale leakage occurs between the connecting flanges 2. It is suitable for popularization and use.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety detection device for a pressurized fluid pipeline, comprising a pressurized fluid pipeline body (1), characterized in that: At the inner top end of the pressurized fluid pipeline body (1), a connecting flange (2) is fixedly connected. Inside the connecting flange (2), a fastening bolt (3) is screwed. The front outer side of the connecting flange (2) is in contact with a front detection shell (4), and the rear outer side of the connecting flange (2) is in contact with a rear detection shell (5). Detection chambers (12) are provided inside both the front detection shell (4) and the rear detection shell (5). At the upper and lower sides of the left and right end faces of the front detection shell (4) and the rear detection shell (5), splicing plates (6) are in contact. Inside the splicing plates (6), screws (7) are screwed in the front and rear sides. In the middle of the front side inside the front detection shell (4), a detection head (14) is fixedly connected. At the output end of the detection head (14), a connecting wire (8) is fixedly connected. At the end of the connecting wire (8) away from the detection head (14), a gas detector (9) is fixedly connected. In the middle of the front side inside the front detection shell (4), a wire arranging hole (13) is provided.

2. The safety detection device for a pressurized fluid pipeline according to claim 1, characterized in that: At the upper and lower sides of the rear of the front detection shell (4) and the upper and lower sides of the front of the rear detection shell (5), they are screwed with the screws (7). In the middle of the front side inside the front detection shell (4), it is in contact with the outer side of the end of the connecting wire (8) close to the detection head (14).

3. The safety detection device for a pressurized fluid pipeline according to claim 1, wherein: The front detection shell (4) and the rear detection shell (5) are fixed at the outer side center position of two connecting flanges (2) fixed together by the fastening bolts (3). The overall shape of the detection chambers (12) inside the front detection shell (4) and the rear detection shell (5) is annular, and the detection chambers (12) at the top end of the rear side of the front detection shell (4) and the detection chambers (12) at the top end of the front side of the rear detection shell (5) communicate with each other.

4. The safety detection device for a pressurized fluid pipeline according to claim 1, wherein: The number of the splicing plates (6) is four, and the splicing plates (6) are distributed at the upper left and right ends and the lower left and right ends of the front detection shell (4) and the rear detection shell (5). Through - type reserved holes are provided in the front and rear sides inside the splicing plates (6), the left and right sides of the rear inside the front detection shell (4), and the left and right sides of the front inside the rear detection shell (5), and the caliber of the through - type reserved holes matches the longitudinal section diameter of the screws (7).

5. The safety detection device for a pressurized fluid pipeline according to claim 1, characterized in that: The detection head (14) is at the position of the front inner wall of the detection chamber (12) inside the front detection shell (4), and the caliber of the wire arranging hole (13) in the middle of the front side inside the front detection shell (4) matches the longitudinal section diameter of the connecting wire (8).

6. The safety detection device for a pressurized fluid pipeline according to claim 1, characterized in that: At the left and right end faces of the front detection shell (4) and the rear detection shell (5), connecting rods (10) are fixedly connected. At the end of the connecting rods (10) away from the front detection shell (4) and the rear detection shell (5), positioning plates (11) are fixedly connected. Inside the positioning plates (11), rubber layers (15) are fixedly connected. The inner side of the rubber layers (15) is in contact with the outer side of the fastening bolts (3).

7. The safety detection device for a pressurized fluid pipeline according to claim 6, characterized in that: The connecting rods (10) and the positioning plates (11) are evenly distributed in an annular shape at the left and right end faces of the front detection shell (4) and the rear detection shell (5). The longitudinal section shape of the positioning plates (11) is semi - circular, and the inner caliber of the positioning plates (11) matches the longitudinal section diameter of the heads of the fastening bolts (3). The thickness of the rubber layers (15) is 1 millimeter.

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