Emergency pressure relief and positive and negative pressure detection system for non-standard container in soil-covered concrete structure

Abstract

The utility model relates to an emergency pressure relief and positive and negative pressure detection system for a non-standard container in an earthing concrete structure. The emergency pressure relief and positive and negative pressure detection system comprises an emergency pressure relief device and a positive and negative pressure detection device. The emergency pressure relief device comprises a carbon steel pipeline which is directly or indirectly connected with a diffusion opening in the top of the non-standard container. The carbon steel pipeline penetrates through a concrete structure inspection hole and is led to a safe position on the outer side of the soil-covered concrete structure. The positive and negative pressure detection device comprises a U-shaped transparent pipe connected with the carbon steel pipeline, and the U-shaped transparent pipe is filled with pressure indication liquid. The positive and negative pressure detection device can safely perform positive and negative pressure detection on the metal container in a limited space, ensures that the stability, strength and air tightness of metal container equipment meet the design process requirements, and is simple in principle, convenient to assemble and disassemble, small in work amount and reusable.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief and pressure detection of chemical containers, and particularly relates to an emergency pressure relief and positive and negative pressure detection system for non-standard containers in a soil-covered concrete structure. Background Art

[0002] In the relocation project of an oil depot, for non-standard containers in a vertical arch-top and cone-bottom soil-covered concrete structure, the fabrication, installation and inspection of non-standard containers need to be carried out in a narrow and restricted space. Due to confidentiality requirements, the outside of the non-standard containers is protected by a concrete structure, and the outermost layer is covered with plain soil as a whole. During the construction process of the oil tank, especially during the positive and negative pressure detection of the water filling test, in order to ensure the safety of newly built equipment and personnel, a positive and negative pressure detection device and an emergency pressure relief device are required to perform relevant positive and negative pressure detections on non-standard containers in the area outside the soil-covered concrete, so as to ensure that the newly built non-standard containers meet the requirements of the drawing design and specifications. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an emergency pressure relief and positive and negative pressure detection system for non-standard containers in a soil-covered concrete structure, which can safely perform positive and negative pressure detections on metal containers in a restricted space.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] An emergency pressure relief and positive and negative pressure detection system for non-standard containers in a soil-covered concrete structure, comprising:

[0006] An emergency pressure relief device, which includes a carbon steel pipe directly or indirectly connected to the vent opening on the top of the non-standard container; the carbon steel pipe passes through the inspection hole of the concrete structure and leads to a safe position outside the soil-covered concrete structure;

[0007] A positive and negative pressure detection device, which includes a U-shaped transparent pipe connected to the carbon steel pipe, and a pressure indicating liquid is filled in the U-shaped transparent pipe.

[0008] As a preferred embodiment of the utility model, the emergency pressure relief device includes a flange, and the flange is installed on the vent opening on the top of the non-standard container and connected to the front end of the carbon steel pipe.

[0009] As a preferred embodiment of the utility model, the emergency pressure relief device includes a pipe support for supporting and fixing the carbon steel pipe, and the pipe supports are respectively arranged on the top of the non-standard container, the top of the soil-covered concrete structure and the ground.

[0010] As a preferred embodiment of the utility model, a gate valve is installed at the rear end of the pipe section of the carbon steel pipe close to the ground, and a safety valve is installed on the pipe section in front of the gate valve, and the U-shaped transparent pipe is connected to the pipe section between the gate valve and the safety valve.

[0011] As a preferred embodiment of the present utility model, the positive and negative pressure detection device includes a display board, and the U-shaped transparent tube is fixed on the surface of the display board.

[0012] As a preferred embodiment of the present utility model, scales with ±25 mm graduations are pasted on the surface of the display board on both sides of the U-shaped transparent tube, and the 0 graduation is in the middle of the scale.

[0013] The present utility model can safely detect the positive and negative pressures of metal containers in confined spaces, ensuring that the stability, strength, and airtightness of metal container equipment meet the design process requirements. The detection device has a simple principle, is convenient for assembly and disassembly, has a small workload, can be reused, and can also be used as a reference for the inspection of other metal containers. Description of the Drawings

[0014] The drawings here are used to provide further illustration of the present utility model, and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, and do not constitute an improper limitation of the present utility model.

[0015] Figure 1 is a schematic structural diagram of an emergency pressure relief and positive and negative pressure detection system for a non-standard container in the soil-covered concrete structure described in the present utility model;

[0016] Figure 2 is a detailed drawing of the positive and negative pressure detection device with a scale of the present utility model.

[0017] In the figure, in the figure, 1 - inner oil tank, 2 - concrete structure, 3 - flange, 4 - pipeline support, 5 - carbon steel pipeline, 6 - protective railing for inspection hole at the top of the concrete structure, 7 - safety valve, 8 - gate valve, 9 - U-shaped transparent tube, 10 - scale, 11 - display board. Detailed Embodiment

[0018] In order to enable those skilled in the art to better understand the present utility model, the following further clearly and completely describes the present utility model with reference to the accompanying drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments and features in the embodiments in this application can be combined with each other.

[0019] An emergency pressure relief and positive and negative pressure detection system for a non-standard container in a soil-covered concrete structure provided by a typical embodiment of the present utility model includes an emergency pressure relief device and a positive and negative pressure detection device, as Figure 1 and Figure 2 shown.

[0020] The emergency pressure relief device includes a carbon steel pipeline 5 directly or indirectly connected to the vent opening at the top of the non-standard container; the carbon steel pipeline 5 passes through the inspection hole of the concrete structure 2 and leads to a safe position outside the soil-covered concrete structure 2;

[0021] Positive and negative pressure detection device, which includes a U-shaped transparent tube 9 connected to a carbon steel pipe 5, and the U-shaped transparent tube 9 is filled with a pressure indicating liquid.

[0022] Among them, the positive and negative pressure detection device with a transparent tube is used for real-time monitoring during the water filling test of the metal container, and the carbon steel pipe is connected to the metal container in the confined space to form an emergency pressure relief device.

[0023] This system is used to test the airtightness, strength and stability of the installation of non-standard containers. It is assembled in the confined space and led to the outside of the concrete. During the specific implementation process, the safety of internal equipment and test personnel can be ensured.

[0024] In this embodiment, the pressure indicating liquid is a weak alkaline solution of phenolphthalein.

[0025] In this embodiment, as Figure 1 shown, the emergency pressure relief device includes a flange 3, and the flange 3 is installed at the vent of the non-standard container tank top and connected to the front end of the carbon steel pipe 5. The carbon steel pipe 5 is matched with a welding flange adapted to the vent, and the carbon steel pipe 5 is led out from the metal container in the confined space.

[0026] In this embodiment, the emergency pressure relief device includes a pipe support 4, and the pipe support 4 is used to support and fix the carbon steel pipe 5. As Figure 1 shown, the pipe supports 4 are respectively arranged at the non-standard container tank top, the top of the covered soil concrete structure and the ground.

[0027] In this embodiment, as Figure 1 shown, a gate valve 8 is installed at the rear end of the pipe section of the carbon steel pipe 5 close to the ground, and a safety valve 7 is installed on the pipe section in front of the gate valve 8. The U-shaped transparent tube 9 is connected to the pipe section of the carbon steel pipe 8 between the gate valve 8 and the safety valve 7.

[0028] In this embodiment, as Figure 2 shown, the positive and negative pressure detection device includes a display board 11, and the U-shaped transparent tube 9 is fixed on the surface of the display board 11.

[0029] In this embodiment, scales with ±25mm graduations are pasted on the surface of the display board on both sides of the U-shaped transparent tube 9. The 0 scale is in the middle of the scale, and each side of the scale is 50mm.

[0030] Next, take a relocation project of an oil depot with a volume of 1000m 3Take the positive and negative pressure detection of non-standard containers in the soil-covered concrete structure as an example. According to the design specifications of the drawings, the design requirements for the non-standard containers in this confined space are a positive pressure of 2.2 kPa and a negative pressure of 1.8 kPa. Since the non-standard containers are located inside the concrete structure and there is only a concrete inspection hole for operators to enter and exit, the risk factor during the water filling test of the non-standard containers is relatively high and the monitoring is difficult. To safely accept the non-standard containers that have been installed in the concrete structure, the utility model was used to monitor and accept 4 oil tanks in the concrete structure of the oil depot project in turn. The specific implementation methods are as follows:

[0031] 1. The non-standard containers in the soil-covered concrete structure meet the conditions for positive and negative pressure detection. The water level in the non-standard containers has reached the designed water level of 6.8 m, and there is no deformation or abnormal noise in the oil tanks in the confined space.

[0032] 2. Use the DN150 vent on the top of the non-standard containers in the concrete structure. Connect the prefabricated DN150 flange 3 to the DN150 carbon steel pipe 5 and connect it to a safe position outside the soil-covered concrete structure through the concrete structure inspection hole. Open a hole on the DN150 carbon steel pipe 5 on the ground part to install a DN50 safety valve 7, connect a DN150 gate valve 8, and open a hole in the middle to install a DN15 ball valve to connect to the U-shaped transparent tube 9 of the positive and negative pressure detection device. The whole is fixed with a pipe support 4.

[0033] 3. The U-shaped transparent tube 9 is a transparent soft rubber tube folded into a U shape, and then fixed on the surface of a 400*500 mm display board 11 with transparent tape. Scales with ±25 mm graduations are pasted on both sides. The rubber tube is filled with a 5% sodium hydroxide solution and phenolphthalein reagent to the zero point on both sides and kept horizontal.

[0034] 4. For the airtightness test of the positive and negative pressure detection device, connect it to the positive and negative pressure detection device through the DN15 ball valve reserved in step 2. Seal the DN150 flange 3 with a DN150 blind plate and conduct an airtightness test on the entire positive and negative pressure detection device to ensure that its sealing performance meets the usage requirements.

[0035] 5. After passing the inspection in step 4, reconnect the DN150 flange 3 again and seal all the openings of the non-standard container inside the concrete. When the ambient temperature is above 5°C, start the positive and negative pressure detection test according to the water filling test plan. It can be calculated from the formula P = pgh that 1 cm of water column is equivalent to 0.1 kPa. Start injecting water into the non-standard container steadily through the pressure pump and monitor it closely. When the positive pressure test value is reached, immediately stop injecting water and increasing the pressure. Enter the confined space to observe whether there is any deformation on the top of the non-standard container and whether there is any leakage at the welds. If it is qualified, immediately open the valve to ensure that the internal and external pressures are the same; during the negative pressure test, start draining water slowly and monitor the right side position of the positive and negative pressure test monitoring device closely. After reaching -1.8 kPa, immediately stop draining water and check whether there is any deformation on the top of the tank. If it is qualified, immediately open the emergency pressure relief valve to ensure that the internal and external pressures of the non-standard container are the same.

[0036] 6. After the positive and negative pressure detection of the non-standard container in the soil-covered concrete structure is qualified, open all the openings, remove the emergency pressure relief device and the positive and negative pressure detection device, and start draining water gradually and slowly to prevent the formation of negative pressure and cause the non-standard container to concave and deform.

[0037] The scope of protection required by the present utility model is not limited to the above specific embodiments. For those skilled in the art, the present utility model can have various deformations and modifications. Any modification, improvement and equivalent replacement made within the concept and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An emergency pressure relief and positive / negative pressure detection system for non-standard containers inside a soil-covered concrete structure, characterized in that, Comprising: An emergency pressure relief device, which includes a carbon steel pipe directly or indirectly connected to the vent opening on the top of the non-standard container tank; the carbon steel pipe passes through the inspection hole of the concrete structure and leads to a safe position outside the covered concrete structure. A positive and negative pressure detection device, which includes a U-shaped transparent tube connected to the carbon steel pipe, and the U-shaped transparent tube is filled with a pressure indicating liquid.

2. The emergency pressure relief and positive / negative pressure detection system for non-standard containers within a covered concrete structure according to claim 1, wherein: The emergency pressure relief device includes a flange, and the flange is installed on the vent opening on the top of the non-standard container tank and connected to the front end of the carbon steel pipe.

3. The emergency pressure relief and positive / negative pressure detection system for non-standard containers within a covered concrete structure according to claim 1 or 2, characterized in that: The emergency pressure relief device includes a pipe support, and the pipe support is used to support and fix the carbon steel pipe, and the pipe supports are respectively arranged on the top of the non-standard container tank, the top of the covered concrete structure and the ground.

4. The emergency pressure relief and positive and negative pressure detection system for non-standard containers in the covered concrete structure according to claim 3, characterized in that: A gate valve is installed at the rear end of the pipe section of the carbon steel pipe close to the ground, and a safety valve is installed on the pipe section in front of the gate valve. The U-shaped transparent tube is connected to the pipe section between the gate valve and the safety valve.

5. The emergency pressure relief and positive / negative pressure detection system for non-standard containers within a covered concrete structure according to claim 1 or 4, characterized in that: The positive and negative pressure detection device includes a display board, and the U-shaped transparent tube is fixed on the surface of the display board.

6. The emergency pressure relief and positive / negative pressure detection system for non-standard containers within a covered concrete structure according to claim 5, characterized in that: Scales with ±25 mm graduations are pasted on the surface of the display board on both sides of the U-shaped transparent tube, and the 0 graduation is in the middle of the scale.

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