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

Abstract

The invention 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, pipeline corrosion is avoided, and medium waste is avoided.

Description

Technical Field

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

[0002] The medium steam or hot water used in the heating process has different water quality depending on the region and customer. In addition to excessive cations such as calcium, magnesium, and aluminum, some heating media also contain a large amount of free chloride ions. The pipes of the tank heating system are mostly made of austenitic metals. Long-term contact with chloride ions will accelerate the corrosion of the heating pipes. In addition, if the residual liquid (condensed water) in the heating pipes cannot be discharged in time, it will affect the heating efficiency and may bring other secondary problems, such as long-term accumulation and breeding of bacteria and the generation of odors.

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

[0004] However, this method of draining the heating pipeline has certain disadvantages, which are specifically manifested in the following two aspects. First, after the heating is completed, the operator often forgets or does not open the valve for other reasons, and the residual liquid from heating accumulates at the bottom of the heating pipeline, causing corrosion of the heating pipeline and other secondary problems. Second, after the residual liquid is discharged, the operator may forget to close the valve. Therefore, when the heating pipeline is used next time and the heating medium is introduced into the heating pipeline, since the valve is not closed, it will cause a great waste of heating medium. Summary of the invention

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

[0006] A heating system for a storage and transportation container comprises 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 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;

[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 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.

[0011] In one embodiment, the heating pipeline includes a medium inlet pipe, a medium outlet pipe and a flow 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 flow pipe is connected with 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 gravity direction, and the discharge port is opened at the low 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, 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 communicated 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, 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 are connected to each other by 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, 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 comprises a first cavity and a second cavity arranged along the axial direction of the valve body. The radial dimension of the first cavity is smaller than the radial dimension 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 also 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 there is a gap between the second end and the cavity wall of the second cavity.

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

[0026] The second inlet is disposed through a cavity wall of the second cavity body 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 the present invention, the heating system of the storage and transportation container includes a heating pipeline, a control pipeline and an automatic drain valve. During the heating process, the heating system can use the medium pressure to act on the automatic drain valve to isolate the discharge port of the heating pipeline from the outside world, thereby ensuring stable and efficient operation of the heating process. After the heating process is completed, the automatic drain valve of the heating system can automatically reset, so that the discharge port of the heating pipeline can be connected to the outside world and the residual liquid in the heating pipeline can be automatically discharged, thereby helping to reduce system pipeline corrosion and other secondary problems and extending the service life of the system pipeline.

[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 operators 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 an embodiment of the present invention.

[0032] Figure 2 It 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 A schematic cross-sectional view 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 on 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 can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0049] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and 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 also change accordingly.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] The storage and transportation container proposed in the present invention is described by taking a tank container for storing and transporting materials such as liquid chemicals with a high melting point as an example. The tank container mainly includes a frame, a tank body installed horizontally inside the frame for storing materials, and a heating system provided on the tank body. The heating system can heat the materials to a certain temperature so that the materials melt into liquid in the tank, which is convenient for unloading or packaging 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, and 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 also Figure 1 As shown, the heating system 20 of the storage and transportation container of the 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 steam or hot water with a relatively high temperature to heat the tank body. In the embodiments of the present application, the heating medium is illustrated by taking steam with a relatively high temperature as an example.

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

[0055] Specifically, see Figure 1 In one embodiment, the heating pipeline 100 includes a medium inlet pipe 140 and 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 low 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 discharge port 130. The control line 200 is mainly used to control the on and off states of the automatic drain valve 300 to realize the discharge of the discharge port 130. The automatic drain valve 300 is arranged on the control line 200, and is mainly used to automatically enter the off state under the control of the control line 200 when the heating line 100 works normally. When the heating line 100 does not work, it can automatically enter the on state to discharge the residual liquid inside 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, Figure 1As shown, the control pipeline 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 discharge port 130, and the first branch pipe 210 is preferably located at the lowest point of 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, that is, 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 of the heating system 20 in the direction of gravity. By arranging the first branch pipe 210 and the automatic drain valve 300 at the lowest point of the heating system 20, it is beneficial for the residual liquid in the heating pipeline 100 to be completely and quickly discharged.

[0062] In the embodiments of the present application, Figure 1 and Figure 3 As shown, when the heating pipeline 100 is working, the medium inlet 110 can transport the medium to the second inlet 320 of the automatic drain valve 300 through the second branch pipe 220, so that the automatic drain valve 300 isolates the first inlet 310, the second inlet 320 and the discharge port 330 from each other under the action of the medium pressure. At this time, the automatic drain valve 300 is in a cut-off state, and the heating pipeline 100 cannot drain water to the outside, which is conducive to ensuring the efficient and stable operation of the heating pipeline 100.

[0063] like Figure 1 and Figure 3 As shown, when the heating pipeline 100 is not working, 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 to make the first inlet 310 and the discharge port 330 communicate with each other. At this time, the automatic drain valve 300 is in a conducting state, and the residual liquid in the heating pipeline 100 can enter the first branch pipe 210 through the discharge port 130, and then enter the first inlet 310 of the automatic drain valve 300 and be discharged from the discharge port 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 component 360. The valve body 340 has a valve cavity 341 inside, and the valve core 350 and the elastic component 360 are both arranged in the valve cavity 341. The valve core 350 is slidably arranged in the valve cavity 341 along the axial direction of the valve body 340, and the two ends of the valve core 350 are respectively a first end 351 and a second end 352. The elastic component 360 keeps the valve core 350 in a position that connects the first inlet 310 and the discharge port 330 to each other through elastic force. The medium pressure can act on the second end 352 to overcome the elastic force to move the valve core 350 toward the first end 351, so that the first inlet 310, the second inlet 320 and the discharge port 330 are isolated 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 communicated 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 may be respectively opened at two ends of the valve body 340 in the axial direction. The outlet 330 may be opened at the middle 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 the present application, Figure 4As shown, the first inlet 310 of the automatic drain valve 300 is connected to the discharge port 130 of the heating pipeline 100. Since the elastic component 360 keeps the valve core 350 in a position where the first inlet 310 and the discharge port 330 are connected to each other through elastic force, that is, the elastic component 360 can keep the automatic drain valve 300 in a conducting state through elastic force. At this time, the residual liquid in the heating pipeline 100 can be discharged to the outside through the discharge port 130, the first inlet 310 and the discharge port 330, so that the residual liquid in the heating pipeline 100 is easily discharged when the heating pipeline 100 is not working. Among them, the flow direction of the residual liquid in the heating pipeline 100 in the automatic drain valve 300 can be as shown by arrow AB.

[0070] See also Figure 5 When the heating pipeline 100 is working, the medium inlet 110 delivers the medium to the second inlet 320 of the automatic drain valve 300, and the medium flow direction can be shown as arrow C. Since the second inlet 320 leads to the second end 352 of the valve core 350, the medium pressure can directly act on the second end 352 to overcome the elastic force and move the valve core 350 toward the first end 351, so that the first inlet 310, the second inlet 320 and the discharge port 330 are isolated from each other. At this time, the automatic drain valve 300 is in a cut-off state, and the heating pipeline 100 cannot drain water outward, which is conducive to ensuring the efficient and stable operation of the heating pipeline 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, and 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, and 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 is mainly used to guide the axial movement of the valve stem 353 and limit the stroke, and the radial dimension of the first cavity 342 matches the radial dimension of the valve stem 353, and the two can be in sealing contact. The second cavity 343 is mainly used to guide the axial movement of the valve plug 354 and limit the stroke, and the radial dimension of the second cavity 343 matches the radial dimension of the valve plug 354, and the two can be 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 arranged on the outer peripheral side wall of the valve stem 353 and is in sealing contact with the cavity wall of the first cavity 342. The second sealing ring 380 is arranged on the outer peripheral side wall of the valve plug 354 and is in sealing contact with the cavity wall of the second cavity 343. By providing the first sealing ring 370, the sealing performance of the matching between the peripheral surface of the valve stem 353 and the cavity wall of the first cavity 342 can be ensured. By providing the second sealing ring 380, the sealing performance of the matching between the peripheral surface of the valve plug 354 and the cavity wall of the second cavity 343 can be ensured.

[0074] like Figure 3 As shown, in one embodiment, the first inlet 310 is provided through the cavity wall of the first cavity 342 opposite to the first end 351. The second inlet 320 is provided through the cavity wall of the second cavity 343 opposite to the second end 352. That is, the first inlet 310 and the second inlet 320 are respectively provided on the two end surfaces of the valve body 340 in the axial direction, so that the structure of the automatic drain valve 300 is more compact. It can be understood that the first inlet 310 and the second inlet 320 are respectively located on both sides of the valve plug 354, and the first inlet 310 and the second inlet 320 are always not connected to each other.

[0075] like Figure 3 As shown, the outlet 330 may be provided 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 not communicated with 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, and the protrusion 355 can abut against the cavity wall of the second cavity 343, so that there is a gap between the second end 352 and the cavity wall of the second cavity 343. By providing the protrusion 355, it is possible to avoid the second end 352 of the valve core 350 and the cavity wall of the valve cavity 341 to form a local vacuum suction force, thereby facilitating the smooth movement of the valve core 350 in the valve cavity 341.

[0077] See also Figure 3 In one embodiment, the elastic member 360 includes a first elastic member 361, and the first elastic member 361 is disposed between the cavity 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 cavity wall of the first cavity 342. When the first elastic member 361 is compressed, it can provide elastic force to the valve stem 353.

[0078] Specifically, 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 and restore the automatic drain valve 300 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 the surface of the valve plug 354 away from the second end 352, and the other end abuts against the cavity wall of the second cavity 343. When the second elastic member 362 is compressed, it can provide elastic force to the valve plug 354.

[0080] Specifically, 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 and restore the automatic drain valve 300 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 doubly guaranteed, so that the automatic drain valve 300 can be quickly and reliably restored to the conductive state when the medium pressure is removed. However, the present application is not limited thereto. In other embodiments, the elastic component 360 may only include the first elastic component 361 disposed between the cavity wall of the first cavity 342 and the valve stem 353. Or the elastic component 360 may only include 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 is understandable that in the embodiment of the present application, when the automatic drain valve 300 enters the cut-off state, since the medium inlet 110 continuously feeds liquid into the second inlet 320, the force exerted by the medium pressure on the second end 352 of the valve core 350 can be greater than the sum of the elastic force of the elastic component 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, so that the first inlet 310, the second inlet 320 and the drain port 330 are isolated from each other.

[0084] In the process of the automatic drain valve 300 restoring the conductive state, the medium inlet 110 no longer flows into the second inlet 320, and only some residual medium exists at the second end 352 of the valve core 350. At the same time, the elastic force of the elastic component 360 can be 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, so the valve core 350 can be reset to a position where the first inlet 310 and the discharge port 330 are connected to each other. The working process of the heating system 20 of the storage and transportation container according to the embodiment of the present invention is as follows:

[0085] See also Figure 4 When the heating pipeline 100 is not working, the valve core 350 in the automatic drain valve 300 is kept in a position where the first inlet 310 and the drain port 330 are connected to each other under the elastic force of the elastic component 360. At this time, the residual liquid in the heating pipeline 100 can be discharged to the outside through the drain port 130, the first inlet 310 and the drain port 330, so that the residual liquid in the heating pipeline 100 is easily discharged when the heating pipeline 100 is not working.

[0086] See also Figure 5 When the heating pipeline 100 is working, the medium inlet 110 delivers the medium to the second inlet 320 of the automatic drain valve 300, and the medium pressure acts on the second end 352 of the valve core 350 to overcome the elastic force and move the valve core 350 toward the first end 351, so that the first inlet 310, the second inlet 320 and the drain port 330 are isolated from each other. At this time, the automatic drain valve 300 is in the cut-off state, and the heating pipeline 100 cannot drain water outward, which is conducive to ensuring the efficient and stable operation of the heating pipeline 100.

[0087] When the heating is finished, 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, and the valve core 350 can automatically reset under the elastic force of the elastic component 360, so that the automatic drain valve 300 is restored to the conductive state, and the drainage function of the heating pipeline 100 is realized. The heating system 20 of the storage and transportation container of the embodiment of the present invention, 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, so that the discharge port 130 of the heating pipeline 100 is isolated from the outside world, and the discharge port 130 is automatically closed, ensuring stable and efficient operation of 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 system pipeline corrosion 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 draining of residual liquid without manual operation during or after the heating process, thereby greatly reducing the labor intensity of the operator and avoiding the 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, which includes a container body 10 and a heating system 20 for the storage and transportation container described in any of the above embodiments. The heating pipeline 100 is arranged outside the container body 10. Specifically, the heating pipeline 100 can also be installed and fixed to the outer wall of the container body 10. Alternatively, the heating pipeline 100 may not be directly installed and fixed to the container body 10, but can be installed in an interlayer wrapped around the outer side of the container body 10, depending on the specific situation.

[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] Although the present invention has been described with reference to several typical 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 embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should 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 communicated with the discharge port, the second inlet is communicated with the medium inlet, and the discharge port is communicated with 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 with 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 gravity direction, and the discharge port is opened at the low 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 communicated 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, 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 are connected to each other by 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 comprises a valve stem and a valve plug connected to each other, 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 comprises a first cavity and a second cavity arranged axially along the valve body, the radial dimension of the first cavity is smaller than the radial dimension 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 comprises 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 being 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. The second elastic member can provide the elastic force to the valve plug when being compressed.

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 disposed through a cavity wall of the first cavity opposite to the first end; The second inlet is disposed through 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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