Pipeline structure suitable for crude benzene feeding

Abstract

The utility model discloses a pipeline structure suitable for crude benzene feeding, which relates to the technical field of crude benzene production, and comprises a main pipeline, an external pipeline and two valve banks, the valve banks are respectively arranged on the main pipeline and the external pipeline, the external pipeline is connected with two connecting pipes, and the two connecting pipes are communicated with the main pipeline. A front end and a rear end are arranged between the two connecting pipes and the main pipeline and located at the two ends of the valve set on the main pipeline respectively. Two connecting pipes are used as a main connecting structure of a main pipeline and an external pipeline, two flow limiting assemblies with opposite flow limiting directions are additionally arranged, the flow limiting assemblies are particularly matched with the flowing direction and the flow difference of raw materials in the main pipeline, and different flow differences and flowing directions are mainly adapted in a self-balancing mode; and therefore, the workload of structures such as a flow valve is reduced, and the influence degree on the raw material conveying process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crude benzene production, in particular to a pipeline structure suitable for crude benzene feeding. Background Art

[0002] The feeding process in conventional crude benzene production uses three raw material tanks as a unit. During normal production, one is used for feeding the device system, another is used to receive crude benzene, and the third is used for system return and oil-water return. When the liquid level in the device feed tank is low, another crude benzene feed tank is drained in advance for confirmation and standby. The third tank is used for feeding, system return and hydrocarbon recovery, and the three tanks are used alternately.

[0003] When a tank needs to be overhauled and is in an isolated state for overhaul, the remaining two tanks cannot meet the system feeding and tank cutting requirements. Then, the current method is to increase the raw material tank. Specifically, the newly entered raw material tank is merged into the above-mentioned unit through the pipeline structure. Its essence is to change the transmission direction of the crude benzene product by reconnecting the pipeline. It is also necessary to meet the transportation requirements of raw materials in different raw material tanks, such as: flow difference and hydraulic difference caused by flow difference. Structures such as flow regulating valves cannot fully adapt to different flow differences, which indirectly affects the transmission process of raw materials. This application proposes a solution. Utility Model Content

[0004] The purpose of the utility model is to provide a pipeline structure suitable for crude benzene feeding. With regard to the current transportation process of crude benzene products, a pipeline structure is added to meet the maintenance and isolation work during daily operation, and maintenance is carried out by relying on structures such as flow control valves. In this process, it is unable to fully adapt to different flow difference requirements, and indirectly affects the transmission process of raw materials.

[0005] The purpose of the utility model can be achieved by the following technical solutions: a pipeline structure suitable for crude benzene feeding, comprising a main pipeline, an external pipeline and two valve groups, the valve groups are respectively installed on the main pipeline and the external pipeline, the external pipeline is connected with two pipes, the two pipes are communicated with the main pipeline, and the two pipes are respectively provided with a front end and a rear end between the two pipes and the main pipeline, the front end and the rear end are respectively located at the two end positions of the valve group on the main pipeline;

[0006] Two groups of current limiting components are arranged in the two-pipe connection, and the current limiting components include a directional sleeve, a front cone rod, and a directional cone rod. The front cone rod is inside the directional sleeve and is slidably connected to the directional sleeve, and the directional cone rod is inside the front cone rod and is slidably connected to the front cone rod.

[0007] It is further configured as follows: one of the valve groups is located in the middle of the external pipe and the second pipe.

[0008] It is further configured as follows: the two groups of the current limiting components are arranged in a mirror image stack along the front end and the rear end, and the flow directions in the current limiting components are opposite.

[0009] It is further configured as follows: a front cone cap is installed at the front end of the front cone rod, and a rear cone cap is installed at the end of the directional cone rod, and the cross sections of the front cone cap and the rear cone cap are curved in the direction pointing to the directional sleeve.

[0010] It is further configured as follows: connecting springs are connected between the front cone cap and the directional sleeve, and between the rear cone cap and the front cone rod, and an inner channel is opened in the front cone rod corresponding to the front cone cap.

[0011] It is further configured as follows: the cross-sections of the front cone rod and the inner channel are both transversely truncated cone-shaped, and the diameter of the front cone rod and the caliber of the inner channel decrease in the direction from the front cone cap to the rear cone cap, a section of the directional cone rod close to the front cone cap matches the inner channel, and the other section of the directional cone rod is cylindrical.

[0012] The utility model has the following beneficial effects:

[0013] The overall structure is an addition and improvement on the basis of the raw material transmission pipeline in the conventional raw material tank. Specifically, the external pipeline is connected to the main pipeline with a two-pipe connection, and it is mainly reflected in adapting to the flow direction and flow rate differences in different raw material transmission processes. Taking the current limiting component as an example, the current limiting component can use the flow rate in the raw material transmission process for self-balancing, and further limit the secondary restriction on the flow direction of the raw material medium in the two groups of current limiting components. On the basis of not affecting the normal transmission of the medium, two groups of current limiting components are used to change the flow rate and flow mode of the raw material during the secondary transmission, thereby reducing the workload of structures such as the flow valve and reducing the degree of impact on the raw material transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of a pipeline structure suitable for crude benzene feeding proposed by the utility model;

[0016] Figure 2 This is a cross-sectional view of a two-pipe connection in a pipeline structure suitable for crude benzene feeding proposed by the utility model;

[0017] Figure 3This is a disassembled diagram of a flow-limiting component in a pipeline structure suitable for crude benzene feeding proposed by the utility model;

[0018] Figure 4 The utility model provides a cross-sectional view of a flow limiting component in a pipeline structure suitable for crude benzene feed.

[0019] In the figure: 1, main pipe; 2, external pipe; 3, valve group; 4, secondary pipe; 101, front end; 102, rear end; 5, directional sleeve; 6, connecting spring; 7, front cone rod; 8, front cone cap; 9, rear cone cap; 10, directional cone rod; 11, inner channel. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of 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.

[0021] Embodiment 1

[0022] In the current transportation process of crude benzene products, in order to meet the maintenance and isolation work in the daily operation process, additional pipeline structures are added, and maintenance is carried out by relying on structures such as flow control valves. In this process, it is not able to fully adapt to different flow difference requirements, which indirectly affects the transmission process of raw materials. The following technical solutions are proposed:

[0023] Reference Figures 1 to 4 In this embodiment, a pipeline structure suitable for crude benzene feeding includes a main pipeline 1, an external pipeline 2 and two valve groups 3, the valve groups 3 are respectively installed on the main pipeline 1 and the external pipeline 2, the external pipeline 2 is connected with a second pipe 4, the second pipe 4 is connected with the main pipeline 1, and a front end 101 and a rear end 102 are respectively arranged between the second pipe 4 and the main pipeline 1, and the front end 101 and the rear end 102 are respectively located at the two ends of the valve group 3 on the main pipeline 1;

[0024] Two groups of flow limiting components are arranged in the second pipe 4, and the flow limiting components include a directional sleeve 5, a front cone rod 7, and a directional cone rod 10. The front cone rod 7 is inside the directional sleeve 5 and is slidably connected to the directional sleeve 5. The directional cone rod 10 is inside the front cone rod 7 and is slidably connected to the front cone rod 7. One of the valve groups 3 is located in the middle position of the external pipe 2 and the second pipe 4. The two groups of flow limiting components are arranged in a mirror image along the front end 101 and the rear end 102, and the flow directions in the flow limiting components are opposite.

[0025] Working principle: For the conventional transmission method of crude benzene products, the main pipeline 1 is used as the connecting pipeline of the original three raw material tanks, and the external pipeline 2 is used to connect the connecting pipeline of the new raw material tank, so that when the external pipeline 2 is connected to the main pipeline 1 with the second pipe 4, when one of the original three raw material tanks needs to be repaired, one of the new raw material tanks can be set as a temporary structure for raw material transmission. This part will not be explained in detail;

[0026] It should be noted that: refer to Figure 1 To illustrate, if the raw material tank connected to the main pipeline 1 is in normal use, then the valve group 3 on the external pipeline 2 is in a temporarily closed state, and the valve group 3 on the main pipeline 1 is in a normal operating state. On the contrary, when the raw material tank connected to the main pipeline 1 is in an overhaul state, then the valve group 3 on the external pipeline 2 is in a normal operating state, and the valve group 3 on the main pipeline 1 can be in a temporarily closed state or continue to maintain a normal operating state, and the raw materials in the raw material tank corresponding to the main pipeline 1 can be transferred along the second pipe 4-external pipeline 2 to the new raw material tank, such as Figure 2 As shown, there are two interfaces, the front end 101 and the rear end 102, between the second pipe 4 and the main pipe 1, which are specifically used to meet different requirements in the raw material transmission process, and a flow limiting component is especially added to the second pipe 4. The flow limiting component is mainly used to limit the flow of the crude benzene product and change its flow direction.

[0027] Embodiment 2

[0028] This embodiment explains the current limiting component in the first embodiment:

[0029] A front cone cap 8 is installed at the front end position of the front cone rod 7, and a rear cone cap 9 is installed at the end position of the directional cone rod 10. The cross sections of the front cone cap 8 and the rear cone cap 9 are curved in the direction pointing to the directional sleeve 5. A connecting spring 6 is connected between the front cone cap 8 and the directional sleeve 5, and between the rear cone cap 9 and the front cone rod 7. An inner channel 11 is opened in the front cone rod 7 corresponding to the front cone cap 8. The cross sections of the front cone rod 7 and the inner channel 11 are both transversely truncated cone-shaped, and the diameter of the front cone rod 7 and the caliber of the inner channel 11 decrease from the front cone cap 8 to the rear cone cap 9. A section of the directional cone rod 10 close to the front cone cap 8 matches the inner channel 11, and the other section of the directional cone rod 10 is cylindrical.

[0030] Solution description: For example, when the crude benzene product needs to be continuously transferred to the main line 1, in this state, the valve group 3 on the main line 1 needs to be closed, and refer to Figure 4 , Figure 4The flow limiting component shown in the figure corresponds to the position of the front end 101, and then the crude benzene product continues to flow through the corresponding inner channel 11 in the front cone cap 8, and the rear cone cap 9 can be pushed away in the direction pointing to the front end 101, and then the crude benzene product can be continuously injected into the main pipeline 1;

[0031] However, it should be noted that the setting direction of the flow limiting component in the corresponding rear end 102 is completely opposite to the setting direction of the flow limiting component in the corresponding front end 101. Then, when the crude benzene product flows into the flow limiting component at the corresponding rear end 102, the crude benzene product continues to push the rear cone cap 9, and because the structural shape of the front cone rod 7 and the directional cone rod 10 is further limited, the crude benzene product is difficult to pass through the flow limiting component in this position. Then, the crude benzene product can only flow along the flow limiting component at the corresponding front end 101. In this process, the crude benzene product preferentially flows through the inner channel 11. However, when the flow rate during the transmission of the crude benzene product is large, the front cone cap 8 can be pushed to move toward the rear cone cap 9, and the directional cone rod 10 can be pushed to move toward the front end 101. In this process, the tension of the two sets of connecting springs 6 is first received, and the tension of the connecting springs 6 is used to "bear" the pressure change during the transmission of the crude benzene product. When the front cone rod 7 moves, not only the flow diameter of the inner channel 11 is increased, but also the additional flow channel between the directional sleeve 5 and the front cone rod 7 is "opened", so as to adapt to the higher transmission pressure in a large-caliber "leakage" manner.

[0032] In summary: the two-pipe connection is used as the main connection structure between the main pipe and the external pipe, and two sets of flow limiting components with opposite flow limiting directions are added, which are specifically adapted to the flow direction and flow difference of the raw materials in the main pipe. It mainly adapts to different flow differences and flow directions in a self-balancing manner, thereby reducing the workload of structures such as the flow valve and reducing the impact on the raw material transmission process.

[0033] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A pipeline structure suitable for crude benzene feeding, comprising a main pipeline (1), an external pipeline (2) and two valve groups (3), characterized in that: The valve group (3) is respectively installed on the main pipe (1) and the external pipe (2); the external pipe (2) is connected to two pipes (4); the two pipes (4) are in communication with the main pipe (1); and a front end (101) and a rear end (102) are respectively provided between the two pipes (4) and the main pipe (1); the front end (101) and the rear end (102) are respectively located at two end positions of the valve group (3) on the main pipe (1); Two groups of current limiting components are arranged in the two-pipe connection (4), and the current limiting components include a directional sleeve (5), a front cone rod (7), and a directional cone rod (10). The front cone rod (7) is inside the directional sleeve (5) and is slidably connected to the directional sleeve (5), and the directional cone rod (10) is inside the front cone rod (7) and is slidably connected to the front cone rod (7).

2. A pipeline structure suitable for crude benzene feeding according to claim 1, characterized in that: One of the valve groups (3) is located in the middle of the external pipe (2) and the second pipe (4).

3. A pipeline structure suitable for crude benzene feeding according to claim 1, characterized in that: The two groups of flow-limiting components are arranged in a mirror-image stack along the front end (101) and the rear end (102), and the flow directions in the flow-limiting components are opposite.

4. A pipeline structure suitable for crude benzene feeding according to claim 1, characterized in that: A front cone cap (8) is installed at the front end of the front cone rod (7), and a rear cone cap (9) is installed at the end of the directional cone rod (10). The cross sections of the front cone cap (8) and the rear cone cap (9) are both curved in the direction pointing to the directional sleeve (5).

5. A pipeline structure suitable for crude benzene feeding according to claim 4, characterized in that: A connecting spring (6) is connected between the front cone cap (8) and the directional sleeve (5), and between the rear cone cap (9) and the front cone rod (7). An inner channel (11) is provided in the front cone rod (7) corresponding to the front cone cap (8).

6. A pipeline structure suitable for crude benzene feeding according to claim 5, characterized in that: The cross sections of the front cone rod (7) and the inner channel (11) are both in the shape of a transverse truncated cone, and the diameter of the front cone rod (7) and the caliber of the inner channel (11) decrease in the direction from the front cone cap (8) to the rear cone cap (9). A section of the directional cone rod (10) close to the front cone cap (8) matches the inner channel (11), and another section of the directional cone rod (10) is cylindrical.

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