Heating system of storage and transportation container and storage and transportation container

Abstract

The utility model relates to a heating system of a storage and transportation container and the storage and transportation container. The heating system of the storage and transportation container comprises a heating pipeline, a control pipeline and an automatic drain valve arranged on the control pipeline. The heating pipeline is provided with a medium inlet, a medium outlet and a discharge outlet, and the adjusting pipeline is connected between the medium inlet and the discharge outlet. The automatic drain valve is provided with a first inlet, a second inlet and a discharge port, the first inlet is communicated with the discharge port, the second inlet is communicated with the medium inlet, and the discharge port is communicated to the outside. When the heating pipeline works, the medium inlet conveys a medium to the second inlet, and the automatic drain valve enables the first inlet, the second inlet and the discharge port to be mutually isolated under the action of medium pressure. When the heating pipeline does not work, the automatic drain valve can reset to enable the first inlet and the discharge port to be communicated with each other, and residual liquid of the heating pipeline enters the first inlet through the discharge port and is discharged to the outside through the discharge port. The heating system can achieve automatic closing and opening of the residual liquid discharge outlet, and pipeline corrosion and medium waste are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of storage and transportation containers, in particular to a heating system for a storage and transportation container and the storage and transportation container. Background Art

[0002] The heating medium used during the heating process, steam or hot water, has varying water quality depending on the region and customer. Some heating media contain not only excessive levels of cations like calcium, magnesium, and aluminum, but also significant amounts of free chloride ions. Tank heating system piping is often made of austenitic metal. Prolonged contact with chloride ions can accelerate corrosion. Furthermore, if residual liquid (condensate) in the heating piping is not promptly drained, it can affect heating efficiency and potentially lead to other secondary issues, such as bacterial growth and odor.

[0003] Therefore, existing tank storage and transportation equipment usually has a residual liquid discharge port at the lowest point of the heating pipeline, and a manual valve at the end of the residual liquid discharge port. When heating is completed, the operator manually opens the valve to drain the residual liquid inside the heating pipeline. When the discharge is completed, the valve is manually closed.

[0004] However, this method of draining the heating line has certain drawbacks, specifically the following two. First, after heating is complete, the operator often forgets or, for other reasons, fails to open the valve. This causes residual liquid to accumulate at the bottom of the heating line, causing corrosion and other secondary problems. Second, after draining the residual liquid, the operator may forget to close the valve. Consequently, the next time the heating line is used and heating medium is introduced, the valve remains open, resulting in significant waste of heating medium. Utility Model Content

[0005] One purpose of the present invention is to solve the deficiencies in the prior art and provide a heating system for storage and transportation containers. To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A heating system for a storage and transportation container includes a heating pipeline, a control pipeline, and an automatic drain valve arranged on the control pipeline;

[0007] The heating pipeline is provided with a medium inlet, a medium outlet and a discharge port, and the control pipeline is connected between the medium inlet and the discharge port;

[0008] The automatic drain valve is provided with a first inlet, a second inlet and a discharge outlet, the first inlet is connected to the discharge outlet, the second inlet is connected to the medium inlet, and the discharge outlet is connected to the outside;

[0009] When the heating pipeline is working, the medium inlet conveys the medium to the second inlet, and the automatic drain valve isolates the first inlet, the second inlet and the drain outlet from each other under the action of the medium pressure;

[0010] When the heating pipeline is not working, the automatic drain valve can be reset to connect the first inlet and the drain port to each other, and the residual liquid in the heating pipeline enters the first inlet through the drain port and is discharged to the outside through the drain port.

[0011] In one embodiment, the heating pipeline includes a medium inlet pipe, a medium outlet pipe and a circulation pipe, the inlet of the medium inlet pipe is a medium inlet for the heating medium to flow in, the outlet of the medium outlet pipe is a medium outlet for the heating medium to flow out, and the circulation pipe is connected to the medium inlet pipe and the medium outlet pipe;

[0012] The medium outlet pipe is lower than the medium inlet pipe and the flow pipe in the direction of gravity, and the discharge port is opened at the lowest point of the medium outlet pipe.

[0013] In one embodiment, the control pipeline includes a first branch pipe and a second branch pipe, one end of the first branch pipe is connected to the discharge port, the other end of the first branch pipe is connected to the first inlet, one end of the second branch pipe is connected to the medium inlet pipe, and the other end of the second branch pipe is connected to the second inlet.

[0014] In one embodiment, the automatic drain valve includes a valve body, a valve core and an elastic component, wherein the valve body has a valve cavity inside, and the valve core and the elastic component are both arranged in the valve cavity;

[0015] The first inlet, the second inlet and the exhaust port are respectively provided on the valve body and communicate with the valve cavity, and the exhaust port is located between the first inlet and the second inlet;

[0016] The valve core is slidably disposed in the valve cavity along the axial direction of the valve body, and the two ends of the valve core are respectively a first end and a second end, the first inlet leads to the first end, and the second inlet leads to the second end;

[0017] The elastic member maintains the valve core at a position where the first inlet and the discharge port communicate with each other through elastic force;

[0018] The medium pressure can act on the second end to overcome the elastic force and move the valve core toward the first end, so that the first inlet, the second inlet and the discharge port are isolated from each other.

[0019] In one embodiment, the valve core includes a valve stem and a valve plug connected to each other, wherein the radial dimension of the valve stem is smaller than the radial dimension of the valve plug, the end of the valve stem away from the valve plug forms a first end, and the end of the valve plug away from the valve stem forms a second end;

[0020] The valve cavity includes a first cavity and a second cavity arranged along the axial direction of the valve body. The radial size of the first cavity is smaller than the radial size of the second cavity. The valve stem is in sealing contact with the cavity wall of the first cavity, and the valve plug is in sealing contact with the cavity wall of the second cavity.

[0021] In one embodiment, the automatic drain valve includes a first sealing ring and a second sealing ring. The first sealing ring is arranged on the outer peripheral side wall of the valve stem and is in sealing contact with the cavity wall of the first cavity. The second sealing ring is arranged on the outer peripheral side wall of the valve plug and is in sealing contact with the cavity wall of the second cavity.

[0022] In one embodiment, the elastic component includes a first elastic member, the first elastic member is arranged between the cavity wall of the first cavity and the valve stem, and the first elastic member can provide elastic force to the valve stem when compressed; and / or

[0023] The elastic component further includes a second elastic member, which is arranged between the cavity wall of the second cavity and the valve plug. When the second elastic member is compressed, it can provide elastic force to the valve plug.

[0024] In one embodiment, a protrusion is provided on the end of the valve plug away from the valve stem, and the protrusion can abut against the cavity wall of the second cavity, so that a gap is formed between the second end and the cavity wall of the second cavity.

[0025] In one embodiment, the first inlet is provided through a cavity wall of the first cavity opposite to the first end;

[0026] The second inlet is penetrated and arranged on the cavity wall of the second cavity opposite to the second end.

[0027] Another object of the present invention is to provide a storage and transportation container, comprising a container body and a heating system for the storage and transportation container as described above, wherein the heating pipeline is arranged outside the container body.

[0028] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0029] In this utility model, the heating system for a storage and transportation container includes a heating pipeline, a control pipeline, and an automatic drain valve. During the heating process, the heating system utilizes medium pressure to act on the automatic drain valve, isolating the drain outlet of the heating pipeline from the outside world, ensuring stable and efficient operation during the heating process. Furthermore, after the heating process ends, the automatic drain valve automatically resets, allowing the drain outlet of the heating pipeline to connect to the outside world and automatically draining any residual liquid from the heating pipeline. This helps reduce corrosion and other secondary problems in the system pipelines, thereby extending the service life of the system pipelines.

[0030] The heating system can achieve normal heating or automatic emptying of residual liquid without manual operation during or after the heating process, which greatly reduces the labor intensity of the operator and avoids the waste of heating medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a heating system for a storage and transportation container according to one embodiment of the present utility model.

[0032] Figure 2 This is a schematic diagram of the application of a heating system for a storage and transportation container according to an embodiment of the present invention.

[0033] Figure 3 yes Figure 1 Schematic diagram of the cross-section of the structure of the automatic drain valve in the heating system shown.

[0034] Figure 4 yes Figure 3 Schematic diagram of the automatic drain valve in the open state.

[0035] Figure 5 yes Figure 3 Schematic diagram of the automatic drain valve in the cut-off state.

[0036] The following are the descriptions of the reference numerals:

[0037] 10-container body; 20-heating system;

[0038] 100-heating pipeline;

[0039] 110- medium inlet; 120- medium outlet; 130- discharge port;

[0040] 140- medium inlet pipe; 150- medium outlet pipe; 160- circulation pipe;

[0041] 200-control pipeline; 210-first branch pipe; 220-second branch pipe;

[0042] 300-Automatic drain valve;

[0043] 310-first inlet; 320-second inlet; 330-exhaust outlet;

[0044] 340-valve body; 341-valve cavity; 342-first cavity; 343-second cavity;

[0045] 350 - valve core; 351 - first end; 352 - second end; 353 - valve stem; 354 ​​- valve plug; 355 - protrusion;

[0046] 360-elastic component; 361-first elastic member; 362-second elastic member;

[0047] 370-first sealing ring; 380-second sealing ring. DETAILED DESCRIPTION

[0048] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0049] In the description of this application, it should be understood that in the embodiments shown in the drawings, indications of directions or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions will also change accordingly.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0051] The storage and transportation container proposed in this utility model is described using a tank container as an example for storing and transporting materials, such as liquid chemicals with a high melting point. The tank container primarily comprises a frame, a tank body mounted horizontally within the frame to store the material, and a heating system attached to the tank body. The heating system heats the material to a specific temperature, causing it to melt into a liquid within the tank, facilitating unloading or repackaging operations.

[0052] It is easy for those skilled in the art to understand that in order to apply the design of the heating system to the design of other types of storage and transportation containers, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below. These changes are still within the scope of the heating system for storage and transportation containers and the principles of storage and transportation containers proposed in the present invention.

[0053] See Figure 1 As shown, the heating system 20 for a storage and transportation container according to an embodiment of the present invention includes a heating pipeline 100, a control pipeline 200, and an automatic drain valve 300. The heating pipeline 100 is used to circulate a heating medium such as high-temperature steam or hot water to heat the tank. In the embodiments of this application, the heating medium is described as high-temperature steam.

[0054] like Figure 1As shown, heating pipe 100 is provided with a medium inlet 110, a medium outlet 120, and a drain port 130. The medium inlet 110 is used to allow the heating medium to flow in. The medium outlet 120 is used to allow the heating medium to flow out. The drain port 130 is used to drain any residual liquid within heating pipe 100. Preferably, drain port 130 is located at the lowest point of heating pipe 100 in the direction of gravity.

[0055] Specifically, see Figure 1 In one embodiment, the heating pipeline 100 includes a medium inlet pipe 140, a medium outlet pipe 150, and a flow pipe 160 connecting the medium inlet pipe 140 and the medium outlet pipe 150. The inlet of the medium inlet pipe 140 is a medium inlet 110 for the heating medium to flow in. The outlet of the medium outlet pipe 150 is a medium outlet 120 for the heating medium to flow out.

[0056] The flow pipe 160 connects the medium inlet pipe 140 and the medium outlet pipe 150 , and may include a plurality of pipe bodies arranged in parallel and spaced relation to each other, or may be a whole pipe body arranged in a winding or serpentine form.

[0057] In one embodiment, the medium outlet pipe 150 is lower than the medium inlet pipe 140 and the flow pipe 160 in the direction of gravity. The discharge port 130 is opened at the lowest point of the medium outlet pipe 150. For example, Figure 2 As shown, the discharge port 130 may be opened at the bottom of the medium outlet pipe 150 .

[0058] See also Figure 1 As shown, the control line 200 is connected between the medium inlet 110 and the drain port 130. The control line 200 is primarily used to control the on / off state of the automatic drain valve 300, thereby enabling drainage from the drain port 130. The automatic drain valve 300 is mounted on the control line 200 and automatically switches to a closed state under the control of the control line 200 when the heating line 100 is operating normally. When the heating line 100 is not operating, it automatically switches to a closed state to drain any residual liquid from the heating line 100 to the outside.

[0059] See also Figure 3 The automatic drain valve 300 is provided with a first inlet 310, a second inlet 320 and a drain outlet 330. Figure 1 As shown, the first inlet 310 is connected to the discharge port 130 through the control line 200 , the second inlet 320 is connected to the medium inlet 110 through the control line 200 , and the discharge port 330 is connected to the outside.

[0060] Specifically, if Figure 1As shown, the control line 200 includes a first branch pipe 210 and a second branch pipe 220. One end of the first branch pipe 210 is connected to the discharge port 130, and the other end of the first branch pipe 210 is connected to the first inlet 310. One end of the second branch pipe 220 is connected to the medium inlet pipe 140, and the other end of the second branch pipe 220 is connected to the second inlet 320.

[0061] In this embodiment, one end of the first branch pipe 210 is connected to the drain port 130. The first branch pipe 210 is preferably located at the lowest point in the heating system 20 in the direction of gravity. The other end of the first branch pipe 210 is connected to the first inlet 310. Specifically, the automatic drain valve 300 is connected to the other end of the first branch pipe 210. The automatic drain valve 300 is preferably located at the lowest point in the heating system 20 in the direction of gravity. Placing the first branch pipe 210 and the automatic drain valve 300 at the lowest point in the heating system 20 facilitates the complete and rapid drainage of residual liquid within the heating pipeline 100.

[0062] In the embodiments of this application, Figure 1 and Figure 3 As shown, when the heating pipe 100 is operating, the medium inlet 110 can deliver the medium to the second inlet 320 of the automatic drain valve 300 through the second branch pipe 220. As a result, the automatic drain valve 300 isolates the first inlet 310, the second inlet 320, and the drain outlet 330 from each other under the action of the medium pressure. At this point, the automatic drain valve 300 is in a closed state, and the heating pipe 100 cannot drain water, thereby ensuring efficient and stable operation of the heating pipe 100.

[0063] like Figure 1 and Figure 3 As shown, when the heating pipeline 100 is not operating, the automatic drain valve 300 is no longer subjected to the continuous action of the medium pressure, and the automatic drain valve 300 can be reset, connecting the first inlet 310 and the drain outlet 330. At this point, the automatic drain valve 300 is in a conducting state, and residual liquid in the heating pipeline 100 can enter the first branch pipe 210 through the drain outlet 130, flow into the first inlet 310 of the automatic drain valve 300, and then be discharged out of the drain outlet 330.

[0064] Specifically, the automatic drain valve 300 can be switched between the on state and the off state in the following manner: Figure 3As shown, the automatic drain valve 300 includes a valve body 340, a valve core 350, and an elastic member 360. The valve body 340 defines a valve cavity 341, and the valve core 350 and the elastic member 360 are both disposed within the valve cavity 341. The valve core 350 is slidably disposed in the valve cavity 341 along the axial direction of the valve body 340. The valve core 350 has a first end 351 and a second end 352. The elastic member 360 uses elastic force to maintain the valve core 350 in a position that connects the first inlet 310 and the drain port 330. Medium pressure can act on the second end 352 to overcome the elastic force and move the valve core 350 toward the first end 351, thereby isolating the first inlet 310, the second inlet 320, and the drain port 330 from each other.

[0065] The first inlet 310, the second inlet 320 and the outlet 330 are respectively provided on the valve body 340 and communicate with the valve cavity 341. The outlet 330 is located between the first inlet 310 and the second inlet 320. Figure 3 As shown, the first inlet 310 and the second inlet 320 can be respectively opened at two ends of the valve body 340 in the axial direction. The exhaust port 330 can be opened at the middle position of the valve body 340.

[0066] It should be noted that, in the embodiment of the present application, the first inlet 310 and the second inlet 320 of the automatic drain valve 300 are always disconnected from each other. The second inlet 320 and the drain outlet 330 of the automatic drain valve 300 are always disconnected from each other.

[0067] like Figure 3 As shown, the first inlet 310 leads to the first end 351. Therefore, the residual liquid in the heating pipeline can enter between the first end 351 and the cavity wall of the valve cavity 341 through the first inlet 310, and then be discharged to the outside through the discharge port 330.

[0068] like Figure 3 As shown, the second inlet 320 leads to the second end 352. Therefore, the heating medium can enter between the second end 352 and the cavity wall of the valve cavity 341 through the second inlet 310 to apply medium pressure to the second end 352.

[0069] In the embodiments of this application, Figure 4As shown, the first inlet 310 of the automatic drain valve 300 is connected to the discharge port 130 of the heating line 100. The elastic member 360 maintains the valve core 350 in a position that connects the first inlet 310 and the discharge port 330, thereby maintaining the automatic drain valve 300 in a conductive state. At this point, residual liquid in the heating line 100 can be discharged to the outside through the discharge port 130, the first inlet 310, and the discharge port 330, thereby facilitating the discharge of residual liquid in the heating line 100 when the heating line 100 is not in operation. The flow direction of residual liquid in the heating line 100 within the automatic drain valve 300 can be shown by arrows AB.

[0070] See also Figure 5 When the heating pipe 100 is operating, the medium inlet 110 delivers medium to the second inlet 320 of the automatic drain valve 300, with the medium flow direction indicated by arrow C. Since the second inlet 320 leads to the second end 352 of the valve core 350, the medium pressure directly acts on the second end 352, overcoming the elastic force and causing the valve core 350 to move toward the first end 351. This isolates the first and second inlets 310, 320, and the drain outlet 330 from each other. At this point, the automatic drain valve 300 is in a closed state, preventing the heating pipe 100 from draining, thereby ensuring efficient and stable operation of the heating pipe 100.

[0071] See also Figure 3 In one embodiment, the valve core 350 includes a valve stem 353 and a valve plug 354 connected to each other. The radial dimension of the valve stem 353 is smaller than the radial dimension of the valve plug 354. The end of the valve stem 353 away from the valve plug 354 forms a first end 351, and the end of the valve plug 354 away from the valve stem 353 forms a second end 352.

[0072] like Figure 3 As shown, the valve cavity 341 includes a first cavity 342 and a second cavity 343 arranged axially along the valve body 340. The radial dimension of the first cavity 342 is smaller than the radial dimension of the second cavity 343. The valve stem 353 is in sealing contact with the cavity wall of the first cavity 342, and the valve plug 354 is in sealing contact with the cavity wall of the second cavity 343. In this embodiment, the first cavity 342 primarily guides the axial movement of the valve stem 353 and limits its stroke. The radial dimension of the first cavity 342 matches the radial dimension of the valve stem 353, and the two are in sealing contact. The second cavity 343 primarily guides the axial movement of the valve plug 354 and limits its stroke. The radial dimension of the second cavity 343 matches the radial dimension of the valve plug 354, and the two are in sealing contact.

[0073] like Figure 3As shown, in one embodiment, the automatic drain valve 300 includes a first sealing ring 370 and a second sealing ring 380. The first sealing ring 370 is disposed on the outer peripheral sidewall of the valve stem 353 and is in sealing contact with the wall of the first cavity 342. The second sealing ring 380 is disposed on the outer peripheral sidewall of the valve plug 354 and is in sealing contact with the wall of the second cavity 343. The provision of the first sealing ring 370 ensures a tight seal between the circumference of the valve stem 353 and the wall of the first cavity 342. The provision of the second sealing ring 380 ensures a tight seal between the circumference of the valve plug 354 and the wall of the second cavity 343.

[0074] like Figure 3 As shown, in one embodiment, the first inlet 310 is disposed through the wall of the first cavity 342 opposite the first end 351. The second inlet 320 is disposed through the wall of the second cavity 343 opposite the second end 352. That is, the first inlet 310 and the second inlet 320 are respectively provided on the two axial end surfaces of the valve body 340, thereby making the structure of the automatic drain valve 300 more compact. It will be understood that the first inlet 310 and the second inlet 320 are respectively located on either side of the valve plug 354, and the first inlet 310 and the second inlet 320 are always disconnected from each other.

[0075] like Figure 3 As shown, the outlet 330 can be opened on the peripheral wall of the first cavity 342. The outlet 330 and the second inlet 320 are respectively located on both sides of the valve plug 354, and the outlet 330 and the second inlet 320 are always disconnected from each other.

[0076] See also Figure 4 In one embodiment, a protrusion 355 is provided on the end of the valve plug 354 away from the valve stem 353. The protrusion 355 can abut against the wall of the second cavity 343, creating a gap between the second end 352 and the wall of the second cavity 343. The protrusion 355 prevents the second end 352 of the valve core 350 from contacting the wall of the valve cavity 341 and generating a local vacuum, thereby facilitating smooth movement of the valve core 350 within the valve cavity 341.

[0077] See also Figure 3 In one embodiment, the elastic member 360 includes a first elastic member 361 disposed between the wall of the first cavity 342 and the valve stem 353. For example, the first elastic member 361 may be a compression spring. One end of the first elastic member 361 may abut against the first end 351, and the other end may abut against the wall of the first cavity 342. When compressed, the first elastic member 361 can provide an elastic force to the valve stem 353.

[0078] Specifically, if Figure 4 and Figure 5As shown, when the heating medium enters the second inlet 320 and applies pressure to the second end 352, the first elastic member 361 is compressed and accumulates elastic force; when the medium pressure is removed, the elastic force accumulated by the first elastic member 361 can reset the valve core 350, so that the automatic drain valve 300 returns to the conductive state.

[0079] like Figure 3 As shown, in one embodiment, the elastic member 360 further includes a second elastic member 362, which is disposed between the cavity wall of the second cavity 343 and the valve plug 354. For example, the second elastic member 362 may be a compression spring. One end of the second elastic member 352 abuts against a surface of the valve plug 354 facing away from the second end 352, while the other end abuts against the cavity wall of the second cavity 343. When compressed, the second elastic member 362 can provide an elastic force to the valve plug 354.

[0080] Specifically, if Figure 4 and Figure 5 As shown, when the heating medium enters the second inlet 320 and applies pressure to the second end 352, the second elastic member 362 is compressed and accumulates elastic force; when the medium pressure is removed, the elastic force accumulated by the second elastic member 362 can reset the valve core 350, so that the automatic drain valve 300 returns to the conductive state.

[0081] In the embodiment of the present application, the elastic component 360 includes a first elastic component 361 and a second elastic component 362. By providing the first elastic component 361 and the second elastic component 362, the elastic force acting on the valve core 350 can be double-protected, allowing the automatic drain valve 300 to quickly and reliably return to the open state when the medium pressure is removed. However, the present application is not limited to this. In other embodiments, the elastic component 360 may include only the first elastic component 361 disposed between the cavity wall of the first cavity 342 and the valve stem 353. Alternatively, the elastic component 360 may include only the second elastic component 362 disposed between the cavity wall of the second cavity 343 and the valve plug 354.

[0082] Of course, the elastic component 360 may also adopt other structural forms, as long as it can provide elastic force to keep the valve core 350 in the conductive state.

[0083] It will be appreciated that in the embodiment of the present application, when the automatic drain valve 300 enters the shutoff state, the medium inlet 110 continuously feeds liquid into the second inlet 320, causing the medium pressure acting on the second end 352 of the valve core 350 to be greater than the sum of the elastic force of the elastic member 360 and the friction between the valve core 350 and the valve body 340. Therefore, the valve core 350 of the automatic drain valve 300 can move toward the first end 351 under the action of the medium pressure, thereby isolating the first inlet 310, the second inlet 320, and the drain port 330 from each other.

[0084] During the process of the automatic drain valve 300 returning to the open state, the medium inlet 110 no longer flows into the second inlet 320, and only some residual medium remains at the second end 352 of the valve core 350. At the same time, the elastic force of the elastic component 360 is greater than the sum of the friction between the valve core 350 and the valve body 340 and the resistance of the residual medium at the second end 352 of the valve core 350. Therefore, the valve core 350 can be reset to a position that connects the first inlet 310 and the drain port 330. The operation process of the heating system 20 of the storage and transportation container according to the present embodiment of the utility model is as follows:

[0085] See also Figure 4 When the heating pipe 100 is not in operation, the valve core 350 in the automatic drain valve 300 is maintained in a position where the first inlet 310 and the drain port 330 are in communication with each other due to the elastic force of the elastic member 360. At this time, the residual liquid in the heating pipe 100 can be discharged to the outside through the drain port 130, the first inlet 310, and the drain port 330, thereby facilitating the discharge of the residual liquid in the heating pipe 100 when the heating pipe 100 is not in operation.

[0086] See also Figure 5 When heating pipe 100 is operating, medium inlet 110 delivers medium to second inlet 320 of automatic drain valve 300. The medium pressure acts on second end 352 of valve core 350, overcoming the elastic force and causing valve core 350 to move toward first end 351. This isolates first inlet 310, second inlet 320, and drain outlet 330 from each other. At this point, automatic drain valve 300 is in a closed state, preventing water from draining from heating pipe 100. This helps ensure efficient and stable operation of heating pipe 100.

[0087] When heating is completed, the medium inlet 110 no longer flows into the second inlet 320, so that the medium pressure applied to the second end 352 of the valve core 350 is removed. The valve core 350 can then automatically reset under the elastic force of the elastic component 360, causing the automatic drain valve 300 to resume its conductive state, thereby achieving the function of draining the heating pipeline 100. The heating system 20 for the storage and transportation container of the present embodiment of the utility model, through the design of the heating pipeline 100, the control pipeline 200, and the automatic drain valve 300, realizes that during the heating process, the medium pressure acts on the automatic drain valve to isolate the discharge port 130 of the heating pipeline 100 from the outside world, realizes the automatic sealing of the discharge port 130, and ensures stable and efficient operation during the heating process. Moreover, after the heating process of the heating system 20 is completed, its automatic drain valve 300 can automatically reset, so that the discharge port 130 of the heating pipeline 100 can be connected to the outside world and the residual liquid in the heating pipeline 100 can be automatically discharged, thereby realizing the automatic discharge of the residual liquid in the heating pipeline 100, which is beneficial to reduce corrosion of the system pipeline and other secondary problems, and extend the service life of the system pipeline.

[0088] The heating system 20 of the storage and transportation container in the embodiment of the present invention, through the design of the heating pipeline 100, the control pipeline 200 and the automatic drain valve 300, can achieve normal heating or automatic emptying of residual liquid without manual operation during or after the heating process, greatly reducing the labor intensity of the operator and avoiding waste of heating medium.

[0089] See also Figure 1 and Figure 2 As shown, one embodiment of the present invention further provides a storage and transportation container, comprising a container body 10 and a heating system 20 for a storage and transportation container as described in any of the above embodiments. The heating pipeline 100 is disposed outside the container body 10. Specifically, the heating pipeline 100 may be mounted and fixed to the outer wall of the container body 10. Alternatively, the heating pipeline 100 may not be directly mounted and fixed to the container body 10, but may be installed in an interlayer wrapped around the outer side of the container body 10, depending on the specific circumstances.

[0090] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0091] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. A heating system for a storage and transportation container, characterized in that: It includes a heating pipeline, a control pipeline and an automatic drain valve arranged on the control pipeline; The heating pipeline is provided with a medium inlet, a medium outlet and a discharge port, and the control pipeline is connected between the medium inlet and the discharge port; The automatic drain valve is provided with a first inlet, a second inlet and a discharge port, the first inlet is connected to the discharge port, the second inlet is connected to the medium inlet, and the discharge port is connected to the outside; When the heating pipeline is working, the medium inlet conveys the medium to the second inlet, and the automatic drain valve isolates the first inlet, the second inlet and the drain outlet from each other under the action of the medium pressure; When the heating pipeline is not working, the automatic drain valve can be reset to make the first inlet and the drain port connected to each other, and the residual liquid in the heating pipeline enters the first inlet through the drain port and is discharged to the outside through the drain port.

2. The heating system for storage and transportation containers according to claim 1, characterized in that: The heating pipeline includes a medium inlet pipe, a medium outlet pipe and a circulation pipe, the inlet of the medium inlet pipe is the medium inlet for the heating medium to flow in, the outlet of the medium outlet pipe is the medium outlet for the heating medium to flow out, and the circulation pipe is connected to the medium inlet pipe and the medium outlet pipe; The medium outlet pipe is lower than the medium inlet pipe and the flow pipe in the direction of gravity, and the discharge port is opened at the lowest point of the medium outlet pipe.

3. The heating system for storage and transportation containers according to claim 2, characterized in that: The control pipeline includes a first branch pipe and a second branch pipe, one end of the first branch pipe is connected to the discharge port, the other end of the first branch pipe is connected to the first inlet, one end of the second branch pipe is connected to the medium inlet pipe, and the other end of the second branch pipe is connected to the second inlet.

4. The heating system for storage and transportation containers according to claim 1, characterized in that: The automatic drain valve comprises a valve body, a valve core and an elastic component, wherein the valve body has a valve cavity inside, and the valve core and the elastic component are both arranged in the valve cavity; The first inlet, the second inlet and the exhaust port are respectively provided on the valve body and communicate with the valve cavity, and the exhaust port is located between the first inlet and the second inlet; The valve core is slidably disposed in the valve cavity along the axial direction of the valve body, and the two ends of the valve core are respectively a first end and a second end, the first inlet leads to the first end, and the second inlet leads to the second end; The elastic member maintains the valve core at a position where the first inlet and the discharge port communicate with each other through elastic force; The medium pressure can act on the second end to overcome the elastic force and move the valve core toward the first end, so that the first inlet, the second inlet and the exhaust port are isolated from each other.

5. The heating system for storage and transportation containers according to claim 4, characterized in that: The valve core includes a valve stem and a valve plug connected to each other, wherein the radial dimension of the valve stem is smaller than the radial dimension of the valve plug, the end of the valve stem away from the valve plug forms the first end, and the end of the valve plug away from the valve stem forms the second end; The valve cavity includes a first cavity and a second cavity arranged axially along the valve body. The radial size of the first cavity is smaller than the radial size of the second cavity. The valve stem is in sealing contact with the cavity wall of the first cavity, and the valve plug is in sealing contact with the cavity wall of the second cavity.

6. The heating system for storage and transportation containers according to claim 5, characterized in that: The automatic drain valve includes a first sealing ring and a second sealing ring. The first sealing ring is arranged on the outer peripheral side wall of the valve stem and is in sealing contact with the cavity wall of the first cavity. The second sealing ring is arranged on the outer peripheral side wall of the valve plug and is in sealing contact with the cavity wall of the second cavity.

7. The heating system for storage and transportation containers according to claim 5, characterized in that: The elastic component includes a first elastic member, the first elastic member is arranged between the cavity wall of the first cavity and the valve stem, and the first elastic member can provide the elastic force to the valve stem when compressed; and / or The elastic component includes a second elastic member, which is arranged between the cavity wall of the second cavity and the valve plug. When the second elastic member is compressed, it can provide the elastic force to the valve plug.

8. The heating system for storage and transportation containers according to claim 5, characterized in that: The end of the valve plug away from the valve stem is provided with a protrusion, and the protrusion can abut against the cavity wall of the second cavity, so that there is a gap between the second end and the cavity wall of the second cavity.

9. The heating system for storage and transportation containers according to claim 5, characterized in that: The first inlet is provided through a cavity wall of the first cavity opposite to the first end; The second inlet is penetrated and arranged on a cavity wall of the second cavity opposite to the second end.

10. A storage and transportation container, characterized in that: A heating system comprising a container body and the storage and transportation container according to any one of claims 1 to 9, wherein the heating pipeline is arranged outside the container body.

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