Pipeline equipment heating device

Abstract

The invention discloses a pipeline equipment heating device. The device comprises pipeline equipment and a pipeline, the inlet end of the pipeline equipment is connected with an inlet pipeline, the outlet end of the pipeline equipment is connected with an outlet pipeline, a shell is fixedly installed outside a shell body of the pipeline equipment to form a sealing cavity, and the sealing cavity is provided with a thermal medium input pipeline and a thermal medium discharge pipeline. The thermal medium input pipeline and the thermal medium discharge pipeline are respectively provided with a stop valve; and the sealing cavity surrounds the shell of the pipeline equipment. The heating device has the beneficial effects that the design is reasonable, and on the basis of not changing the internal structure of the pipeline equipment, the pipeline is utilized to purge high-temperature steam or a high-temperature medium conveyed by the pipeline to heat the cavity of the heating device of the pipeline equipment, so that the purpose of heating the pipeline equipment is achieved; the structure is simple, processing is convenient and cost is low; and fire and electric heating are avoided, safety and reliability are achieved, and safety accidents are effectively prevented.

Description

Technical Field

[0001] The present invention relates to a heating device, in particular to a heating device for pipeline equipment, and belongs to the technical field of petrochemical equipment. Background Art

[0002] In the petrochemical industry, due to different processed products, the transported media are also different. Among them, various types of valves, pumps, fans, etc. used for transporting media, regulating media flow, and process reactions are collectively referred to as pipeline equipment.

[0003] In actual use, various problems will occur due to different transported media and working temperatures. For example, for some face-sealed valves, under high-temperature working conditions, after the valve is closed, when the pipeline stops running during the shutdown of the device, since the pipeline is in an outdoor normal-temperature environment, the cooling rate of the pipeline is faster than that inside the pipeline. Because one part of the two sealing faces of the face-sealed valve is located inside the pipeline and the other part is connected to the pipeline equipment housing or the inner wall of the pipeline, the shrinkage amount of the sealing face connected to the pipeline equipment housing / inner wall of the pipeline is greater than that of the sealing face immersed in the high-temperature medium inside the pipeline, and the "jamming" situation will occur, resulting in the valve being unable to restart, seriously affecting the operation or inspection and maintenance of the device, and even posing a safety risk. Another example is that in the pipelines of some devices, the transported medium is gaseous at a certain temperature and will become slurry or solid state as the temperature drops to normal temperature. If the slurry or solid medium deposits on the surface of the rotating parts, sliding parts or sealing parts of the pipeline control equipment, the function of the pipeline control equipment will fail.

[0004] To solve the above problems, the commonly used methods are to wind heating tapes (blankets) outside the pipeline or to bake the outer wall of the pipeline with fire. Since most of the media transported by the pipelines of petrochemical devices are flammable, explosive, toxic and harmful, the use of open fire is usually prohibited. Even when using electric heating, relevant approval procedures need to be handled. If there are no corresponding supporting safety measures, the use of electric heating tapes (blankets) to heat the pipeline is also restricted. Summary of the Invention

[0005] In order to overcome the above deficiencies in the existing heating of pipeline equipment, the present invention provides a heating device for pipeline equipment.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a heating device for pipeline equipment, including pipeline equipment and a pipeline. The inlet end of the pipeline equipment is connected to the inlet pipeline, and the outlet end of the pipeline equipment is connected to the outlet pipeline. The outer shell is fixedly installed outside the housing of the pipeline equipment to form a sealed cavity. The sealed cavity is provided with a heat medium input pipeline and a heat medium discharge pipeline, and stop valves are respectively installed on the heat medium input pipeline and the heat medium discharge pipeline.

[0007] The sealed cavity surrounds the shell of the pipeline equipment.

[0008] The inlet end of the heat medium input pipeline is communicated with the inlet pipeline, and the outlet end of the heat medium input pipeline is communicated with the sealed cavity.

[0009] The inlet end of the heat medium discharge pipeline is communicated with the sealed cavity, and the outlet end of the heat medium discharge pipeline is communicated with the outlet pipeline.

[0010] The inlet end of the heat medium input pipeline is communicated with the heating equipment.

[0011] The outlet end of the medium discharge pipeline is communicated with other equipment or the atmosphere.

[0012] The beneficial effects of the present invention are as follows: reasonable design, on the basis of not changing the internal structure of the pipeline equipment, using the high-temperature steam for pipeline purging or the high-temperature medium transported by the pipeline to heat the cavity of the heating device of the pipeline equipment, so as to achieve the purpose of heating the pipeline equipment; simple structure, convenient for processing and low in cost; avoiding heating by fire and electricity, safe and reliable, and effectively preventing the occurrence of safety accidents. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the heating device of the pipeline equipment of the present invention.

[0014] Figure 2 It is a schematic structural diagram of an embodiment of the present invention.

[0015] In the figure: 1. Pipeline equipment, 2. Inlet pipeline, 3. Sealed cavity, 4. Heat medium input pipeline, 5. Globe valve, 6. Outer shell, 7. Shell, 8. Outlet pipeline, 9. Heat medium discharge pipeline. Detailed Embodiments

[0016] The present invention will be further described below in conjunction with the drawings and embodiments. However, those skilled in the art should know that the present invention is not limited to the specific embodiments listed, and as long as it conforms to the spirit of the present invention, it should be included in the protection scope of the present invention.

[0017] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "left", "right", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing or simplifying the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0018] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "install", "connected", "connected", "sealed" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, a direct connection, an indirect connection, or an integral connection; it can be a mechanical connection, indirectly connected through an intermediate medium, or the communication inside two components. The sealing can be oil seal, packing seal or other forms of sealing. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See appendix Figure 1 、 2 。 A heating device for pipeline equipment according to the present invention includes pipeline equipment 1 and a pipeline. The inlet end of the pipeline equipment 1 is connected to the inlet pipeline 2, and the outlet end of the pipeline equipment 1 is connected to the outlet pipeline 8. The outer shell 6 is fixedly installed outside the housing 7 of the pipeline equipment 1 to form a sealed cavity 3. A heat medium input pipeline 4 and a heat medium discharge pipeline 9 are provided in the sealed cavity 3, and stop valves 5 are respectively installed on the heat medium input pipeline 4 and the heat medium discharge pipeline 9. Preferably, the longitudinal section of the outer shell 6 is U-shaped, and the side walls on both sides of the U-shaped outer shell 6 are fixedly connected to the housing 7 of the pipeline equipment 1. The outer shell 6 and the housing 7 of the pipeline equipment 1 form a sealed cavity 3.

[0020] Furthermore, the sealed cavity 3 surrounds the housing 7 of the pipeline equipment 1. Inputting heat medium into the sealed cavity 3 can heat or keep warm the pipeline equipment 1.

[0021] The inlet end of the heat medium input pipeline 4 is communicated with the inlet pipeline 2, and the outlet end of the heat medium input pipeline 4 is communicated with the sealed cavity 3, so that the high-temperature steam for pipeline purging or the high-temperature medium transported by the pipeline enters the sealed cavity 13, conducts heat to the housing 7 of the pipeline equipment 1, heats or keeps warm the pipeline equipment 1, and prevents the temperature of the transported medium from dropping to normal temperature and becoming a slurry state or solid state and depositing on the surfaces of the rotating parts, sliding parts or sealing parts of the pipeline control equipment, resulting in the failure of the function of the pipeline control equipment.

[0022] The inlet end of the heat medium discharge pipeline 9 is communicated with the sealed cavity 3, and the outlet end of the heat medium discharge pipeline 9 is communicated with the outlet pipeline 8, realizing the flow of the heat medium in the sealed cavity 3 and maintaining the temperature in the sealed cavity 3.

[0023] The present invention can also utilize the heat medium outside the pipeline of the device where the pipeline is located, connect the inlet end of the heat medium input pipeline 4 to the heat supply equipment, and connect the outlet end of the medium discharge pipeline 9 to other equipment or the atmosphere (as Figure 2 shown).

[0024] The application of the present invention does not limit the source and type of the heating medium, nor the type of pipeline equipment. It can be applied in any occasion where there is an external heating requirement for pipeline equipment. That is, a closed cavity and corresponding heating and discharge pipelines are designed on the external design of the equipment to enable it to achieve the heating function.

[0025] When applying the pipeline equipment heating device of the present invention, when the pipeline stops operating, in order to prevent the pipeline equipment from malfunctioning and being unable to restart due to temperature reduction, first open the stop valves 5 on the heat medium input pipeline 4 and the heat medium discharge pipeline 9, so that the heat medium can enter the sealed cavity 3 in time, and solve problems such as the sealing pair being locked due to inconsistent expansion caused by the pipeline equipment housing 7 communicating with the external environment, and the easily variable conveying medium condensing into a solid or slurry state on the pipeline wall, etc., to ensure the normal use performance of the pipeline equipment when the pipeline restarts. Just close the stop valves 5 on the heat medium input pipeline 4 and the heat medium discharge pipeline 9 before the pipeline resumes normal production.

[0026] The pipeline equipment heating device of the present invention is characterized in that, without changing the internal structure of the pipeline equipment, a closed cavity structure is designed and added at the part that needs to be heated, and the heat medium is introduced into it to achieve the purpose of heating.

[0027] The present invention does not clearly limit the heating medium, as long as the heat source that is most easily obtained at the site where the pipeline equipment is located can be used, such as superheated saturated steam for purging, or high-temperature medium transported by the pipeline, etc.

[0028] The purpose of the present invention is to develop a pipeline equipment heating structure, design an external sealed cavity structure at the part where the performance of the pipeline equipment may be affected by temperature changes, and when the temperature change affects the performance of the pipeline equipment, introduce a high-temperature medium into the sealed cavity to heat the pipeline equipment, so as to reduce or eliminate the influence on the performance of the pipeline equipment caused by temperature changes.

[0029] Such as Figure 1 For a three-eccentric high-temperature hard-sealed butterfly valve shown, when the valve is shut down emergently and then restarted, due to the hot-state closing, the valve sealing pair may be locked and unable to open normally. The hot-state medium transported in the inlet pipeline can be introduced into the sealed cavity to heat the valve body (housing), avoiding the shrinkage of the valve body and thus eliminating the locked phenomenon, enabling the valve to be reopened.

[0030] It should be noted that the above embodiments are examples rather than limiting the present invention, and those skilled in the art will be able to design many alternative embodiments without departing from the scope of the claims of this patent.

Claims

1. A heating device for pipeline equipment, comprising pipeline equipment and pipelines. The inlet end of the pipeline equipment is connected to an inlet pipeline, and the outlet end of the pipeline equipment is connected to an outlet pipeline. It is characterized in that: The outer shell is fixedly installed outside the housing of the pipeline equipment to form a sealed cavity. The sealed cavity is provided with a heat medium input pipeline and a heat medium discharge pipeline, and stop valves are respectively installed on the heat medium input pipeline and the heat medium discharge pipeline.

2. The heating device for pipeline equipment according to claim 1, It is characterized in that: The sealed cavity surrounds the housing of the pipeline equipment.

3. The heating device for pipeline equipment according to claim 2, It is characterized in that: The inlet end of the heat medium input pipeline communicates with the inlet pipeline, and the outlet end of the heat medium input pipeline communicates with the sealed cavity.

4. The heating device for pipeline equipment according to claim 2, It is characterized in that: The inlet end of the heat medium discharge pipeline communicates with the sealed cavity, and the outlet end of the heat medium discharge pipeline communicates with the outlet pipeline.

5. The heating device for pipeline equipment according to claim 2, It is characterized in that: The inlet end of the heat medium input pipeline communicates with a heating device.

6. The heating device for pipeline equipment according to claim 2, It is characterized in that: The outlet end of the medium discharge pipeline communicates with other equipment or the atmosphere.

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