External heating device for tank body of tank truck

Abstract

The present invention relates to an external heating device for a tank body of a tank truck, so as to solve the technical problems of low steam utilization efficiency and failure to provide good heating effect on the tank body outside the pillow in the prior art. The device comprises a bottom heating chamber A and two heating chambers B respectively arranged on both sides of the bottom heating chamber A in the circumferential direction, each heating chamber B is further divided into two mutually independent sub-heating chambers by an annular drainage groove-shaped member, each sub-heating chamber is isolated into a plurality of sub-chambers by a plurality of support members with open ends, and the plurality of open ends and the plurality of sub-chambers constitute an S-shaped steam flow channel connected to the bottom heating chamber A, the inlet of which is close to the center of the bottom of the tank body and the outlet is close to the tank body head, the annular drainage groove-shaped member is connected to at least one sub-chamber and the bottom heating chamber A at the same time, and a condensate outlet is provided in the middle of the bottom heating chamber A, thereby realizing the diversion of steam and condensate.

Description

Technical Field

[0001] The invention relates to a heating device, in particular to an external heating device for a tank body of a tank car, which can be applied to railway tank cars and road tank cars. Background Art

[0002] At present, a heating jacket is commonly used for external heating of tank trucks, that is, the heating jacket is fixed to the lower part of the tank body with a positive cone inclined bottom structure on the tank truck, and the tank body is heated by inputting high-temperature and high-pressure water vapor into the heating jacket.

[0003] The existing heating jacket structure is mainly composed of a heating jacket plate and annular supports. The heating jacket plate, annular supports and the bottom of the tank form multiple closed chambers. These chambers are connected in series by small holes on the annular supports or in parallel by the guide structure of the heating jacket to form a complete steam channel. The steam enters from the middle of the bottom of the tank, and is collected at the steam outlet through the above chambers. The maximum travel of the steam is about half the length of the tank. In the second half of the heating cycle, because the travel of the steam in the heating jacket is limited (half the length of the tank), the heat is not fully absorbed and is discharged into the atmosphere, resulting in energy waste.

[0004] In addition, most of this heating sleeve structure does not arrange a heating zone on the outside of the tank body's pillow (head part), or even if a heating zone is set up outside the pillow, its steam will finally enter the area outside the pillow to heat the tank body. At this time, the steam has passed through the large heating area inside the pillow and lost most of the heat, so it cannot play a good heating role on the tank body outside the pillow.

[0005] Although this heating method has the advantages of good safety, large heating area and easy operation, it still has disadvantages such as low steam utilization efficiency and inability to heat the tank body outside the pillow. As people pay more and more attention to environmental protection and eliminating energy waste, there is an urgent need for an efficient and energy-saving heating device to fully heat the outside of the tank body of the tank truck. Summary of the invention

[0006] The purpose of the present invention is to solve the technical problem of low steam utilization efficiency when the existing heating jacket heats the tank body of a tank truck, and to provide an external heating device for the tank body of a tank truck.

[0007] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0008] An external heating device for a tank truck tank body, which is special in that it comprises a bottom heating shell and two side heating shells;

[0009] The bottom heating shell is sealed and connected to the bottom of the tank body to form a bottom heating chamber A;

[0010] The two side heating shells are respectively arranged on both sides of the bottom heating shell in the circumferential direction and are respectively sealed and connected to the tank body, thereby forming two heating chambers B;

[0011] Each side heating shell is provided with an annular drainage groove in the middle, dividing the heating chamber B into two independent sub-heating chambers;

[0012] Each sub-heating chamber is provided with N support members with one end open, and the N support members separate the sub-heating chamber into N+1 sub-chambers, where N≥1;

[0013] The positions of the opening ends of every two adjacent support members are different, and the multiple opening ends and N+1 sub-cavities form an S-shaped steam flow channel connected to the bottom heating chamber A;

[0014] The inlet of the steam flow channel of each sub-heating chamber is arranged near the center of the bottom of the tank body, and the outlet of the steam flow channel is arranged near the head position of the tank body;

[0015] The annular drainage groove-shaped member is provided with a first condensed water flow hole connected to at least one sub-chamber, and a second condensed water flow hole connected to the bottom heating chamber A;

[0016] A condensed water outlet is arranged in the middle of the bottom heating shell.

[0017] Furthermore, in order to better heat the tank body outside the pillow, it also includes a plurality of external pillow heating shells, which are respectively arranged on the outside of each sub-heating cavity, and are closed and connected with the pillow part of the tank body to form an external pillow heating cavity C; each external pillow heating cavity C is connected with the corresponding sub-heating cavity; each external pillow heating shell is provided with a steam outlet, and the steam outlet is arranged close to the head position of the tank body.

[0018] Furthermore, in order to directly guide the steam to the external heating chamber C of the pillow, a guide piece is also provided in the sub-heating chamber, the inlet end of the guide piece is close to the inlet of the steam flow channel, and the outlet end of the guide piece is close to both the bottom heating chamber A and the external heating chamber C of the pillow.

[0019] Furthermore, in order to increase the heat transfer area, the plurality of support members are all made of channel steel, one edge of the opening side of each channel steel is fully welded to the tank body, and the other edge is intermittently welded to the tank body, and a plurality of notches are opened on the edge.

[0020] Furthermore, in order to ensure that the flow rate at the mouth of each steam flow channel of the heating device is the same, a stainless steel braided hose for connecting to an external steam main pipe is provided on the inlet of the steam flow channel.

[0021] Furthermore, in order to facilitate processing, the annular drainage groove-shaped member adopts annular channel steel.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The external heating device of the tank body of a tank truck provided by the present invention mainly comprises a bottom heating chamber A and two heating chambers B respectively arranged on both sides of the circumference of the bottom heating chamber A, each heating chamber B is further divided into two independent sub-heating chambers by an annular drainage groove-shaped member, each sub-heating chamber is isolated into a plurality of sub-cavities by a plurality of supporting members with open ends, the plurality of open ends and the plurality of sub-cavities constitute an S-shaped steam flow channel connected with the bottom heating chamber A, the inlet of which is close to the bottom center of the tank body and the outlet is close to the tank body head, the annular drainage groove-shaped member is connected with at least one sub-cavity and the bottom heating chamber A at the same time, and a condensate outlet is provided in the middle of the bottom heating chamber A, thereby realizing the diversion of steam and condensate. The heating device of the present invention can fully heat the bottom of the tank body, ensuring that the discharge port located at the bottom of the tank body is fully heated, which is convenient for unloading; the setting of the S-shaped steam flow channel can effectively increase the stroke of the steam in the heating device, and the positions of the steam flow channel inlet and outlet are arranged far away from each other, so that the stroke of the steam in the heating device is maximized, which is greatly improved compared with the stroke of half the length of the tank body in the prior art, thereby improving the steam utilization rate and reducing energy waste.

[0024] 2. The four sub-heating chambers of the heating device can be regarded as four completely independent sub-parts, so independent steam inlets and outlets are set respectively without affecting each other.

[0025] 3. The external heating device for the tank body of the tank truck provided by the present invention also includes a plurality of external pillow heating shells which are respectively arranged on the outside of each sub-heating zone, are closed and connected with the outer pillow part of the tank body, and form an external pillow heating chamber C. Each external pillow heating chamber C is communicated with the corresponding sub-heating chamber B. A steam outlet is opened on the upper part of each external pillow heating shell, and the steam outlet is arranged close to the head position of the tank body, so as to directly transport the high-temperature steam to the tank body (head) area outside the pillow, which has a better heating effect on the tank body outside the pillow.

[0026] 4. A guide piece is also provided in the sub-heating chamber, and the inlet end of the guide piece is close to the inlet of the steam flow channel, and the outlet end of the guide piece is close to the bottom heating chamber A and the pillow outer heating chamber C at the same time, so that the high-temperature steam is directly introduced into the pillow outer heating chamber C from the inlet of the steam flow channel, which effectively shortens the steam travel so that the steam entering the pillow outer heating chamber C is still at high temperature.

[0027] 5. Multiple support members are made of channel steel. One edge of the opening side of each channel steel is fully welded to the tank body, and the other edge is intermittently welded to the tank body. Multiple notches are opened on the edge to allow steam to flow into the cavity of the channel steel, thereby increasing the heat transfer area.

[0028] 6. A stainless steel braided hose is provided at the entrance of the steam flow channel for connecting to the external steam main pipe for introducing and distributing steam. The use of a stainless steel braided hose here not only reduces weight, simplifies the process, but also ensures that the flow rate at the mouth of each steam flow channel of the heating device is the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of an embodiment of the present invention installed at the bottom of a tank;

[0030] Figure 2 This is a schematic diagram of an embodiment of the present invention installed at the bottom of a tank body in an upward direction;

[0031] Figure 3 This is a schematic diagram of the structure of a tank body with a positive cone inclined bottom structure according to an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of an embodiment of the present invention, and the arrows indicate the steam flow direction;

[0033] Figure 5 It is a schematic diagram of the structure of a sub-heating chamber and its corresponding pillow outer heating chamber C in an embodiment of the present invention;

[0034] Figure 6 Schematic diagram of the steam flow direction of a sub-heating chamber and its corresponding pillow outer heating chamber C in an embodiment of the present invention, with arrows indicating the steam flow direction;

[0035] Figure 7 Schematic diagram of the condensed water flow direction of a sub-heating chamber and its corresponding pillow outer heating chamber C in an embodiment of the present invention, where arrows indicate the condensed water flow direction;

[0036] Description of reference numerals:

[0037] 1- bottom heating shell, 2- side heating shell, 3- annular drainage groove, 4- support, 5- inlet of steam flow channel, 6- first condensate flow hole, 7- second condensate flow hole, 8- condensate outlet, 9- pillow outer heating shell, 10- steam outlet, 11- drainage piece, 12- notch, 13- stainless steel braided hose, 14- tank body. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] An external heating device for a tank truck tank body, such as Figure 1 and Figure 2 As shown, it is arranged between the tank truck and the tank body with a positive cone inclined bottom structure. Figure 3 As shown, the specific structure of the heating device is as follows Figure 4As shown, it includes a bottom heating shell 1 and two side heating shells 2; the bottom heating shell 1 is closed and connected to the bottom of the tank body 14 to form a bottom heating chamber A; the two side heating shells 2 are respectively arranged on both sides of the bottom heating shell 1 in a circumferential direction, and are respectively closed and connected to the tank body 14, so as to form two heating chambers B; an annular drainage groove-shaped member 3 is provided in the middle of each side heating shell 2 to divide the heating chamber B into two independent sub-heating chambers.

[0040] like Figure 5 As shown, each sub-heating chamber is provided with N support members 4 with one end open, and the N support members 4 isolate the sub-heating chamber into N+1 sub-chambers, and the multiple open ends and the N+1 sub-chambers constitute an S-shaped steam flow channel connected to the bottom heating chamber A. According to the different heights relative to the ground, the N+1 sub-chambers are chamber 1, chamber 2, ..., chamber N, chamber N+1 from bottom to top, and the positions of the open ends of each two adjacent support members 4 are different. The inlet 5 of the steam flow channel is set in the center position of the bottom of the tank body 14 in the chamber 1, and the inlet 5 of the steam flow channel is provided with a stainless steel braided hose 13 for connecting to the external steam main pipe; the outlet of the steam flow channel is set in the chamber N+1 and close to the head position of the tank body 14. With this structure, the inlet 5 of the steam flow channel and the outlet of the steam flow channel can be as far away from each other as possible, so that the steam travels the maximum distance in the heating device.

[0041] Since the tank body of the tank truck is a right cone inclined bottom structure, the condensed water will gather in the middle of the tank body, so one or more first condensed water flow holes 6 connected to one or more of the N+1 sub-cavities and a second condensed water flow hole 7 connected to the bottom heating chamber A are provided on the annular drainage groove 3; a condensed water outlet 8 is provided in the middle of the bottom heating shell 1.

[0042] The heating device also includes a plurality of pillow external heating shells 9, which are respectively arranged outside each sub-heating chamber and are sealed and connected with the pillow external part of the tank body 14 to form a pillow external heating chamber C; each pillow external heating chamber C is connected with the corresponding sub-heating chamber; each pillow external heating shell 9 is provided with a steam outlet 10, and the upper part of the steam outlet 10 is arranged near the head of the tank body 14, and the inlet 5 and the steam outlet 10 of the steam flow channel are as far away from each other as possible, so that the steam travels the maximum distance in the heating device. A guide piece 11 is also arranged in the sub-heating chamber, and the inlet end of the guide piece is close to the inlet 5 of the steam flow channel, and the outlet end of the guide piece is close to the bottom heating chamber A and the pillow external heating chamber C (that is, close to the lower area of ​​the pillow external heating chamber C), so that the hot steam is directly introduced into the pillow external heating chamber C from the inlet 5 of the steam flow channel, and the guide piece 11 passes through the web of the tank car's bolster, and the steam travel is short, so that the steam temperature introduced into the pillow external heating chamber C is relatively high.

[0043] The plurality of support members 4 are all made of channel steel, one edge of the opening side of each channel steel is fully welded to the tank body 14, and the other edge is intermittently welded to the tank body 14, and a notch (notch) 12 is provided at the unwelded part, so that steam can flow into the cavity of the channel steel to increase the heat transfer area; the annular drainage groove member 3 is made of annular channel steel, and the second condensate flow hole 7 is just the port of the annular channel steel near the bottom of the tank body. After all the above connections are completed, steam and condensate shall not leak.

[0044] Working process:

[0045] Steam flow direction (such as Figure 6 shown):

[0046] In the sub-heating chambers: high-temperature, high-pressure steam enters from the inlet of the steam flow channel of each sub-heating chamber, and a part of the steam enters the S-shaped steam flow channel, passes through chamber 1, chamber 2, ..., chamber N, chamber N+1 in sequence, and is then discharged from the outlet of the steam flow channel of the sub-heating chamber, which effectively increases the stroke of the steam in the heating device, and the positions of the steam flow channel inlet and outlet are arranged far away from each other, so that the stroke of the steam in the heating device is maximized. Compared with the stroke of half the length of the tank body in the prior art, it is greatly improved, thereby improving the steam utilization rate and reducing energy waste.

[0047] In the bottom heating chamber: another part of the steam entering from the inlet of the steam flow channel of each sub-heating chamber enters the bottom heating chamber A and is discharged from the condensed water outlet in the middle of the bottom heating chamber A;

[0048] Inside the external pillow heating chamber: the steam entering from the inlet of the steam flow channel of each sub-heating chamber directly enters the external pillow heating chamber C from chamber 1 through the guide piece 11, and is then discharged from the steam outlet 10. Since the high-temperature steam is directly introduced into the external pillow heating chamber C from the inlet of the steam flow channel, the steam travel is effectively shortened, so that the steam entering the external pillow heating chamber C is still at high temperature.

[0049] Condensate flow direction (such as Figure 7 shown):

[0050] In the sub-heating chamber: the high-temperature steam gradually condenses into condensed water during the heat exchange process, and the condensed water flows into the annular drainage groove 3 from the first condensed water flow hole 6, and enters the bottom heating chamber through the second condensed water flow hole 7;

[0051] In the bottom heating chamber: the high-temperature steam gradually condenses into condensed water during the heat exchange process, and is discharged from the condensed water outlet in the middle of the bottom heating chamber A together with the condensed water coming in from the second condensed water flow hole 7;

[0052] In the heating chamber outside the pillow: the high-temperature steam gradually condenses into condensed water during the heat exchange process, enters chamber 1 of the sub-heating chamber from the lower part of the heating chamber outside the pillow, and then enters the bottom heating chamber A, and is discharged from the condensed water outlet in the middle of the bottom heating chamber A.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. For ordinary professional and technical personnel in the field, the specific technical solutions recorded in the aforementioned embodiments can be modified, or some of the technical features therein can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions protected by the present invention.

Claims

1. An external heating device for a tank truck tank body, characterized in that: It comprises a bottom heating shell (1) and two side heating shells (2); The bottom heating shell (1) is sealed and connected to the bottom of the tank body (14) to form a bottom heating chamber A; The two side heating shells (2) are respectively arranged on both sides of the bottom heating shell (1) in a circumferential direction and are respectively sealed and connected to the tank body (14), thereby forming two heating chambers B; A circular drainage groove (3) is provided in the middle of each side heating shell (2) to divide the heating chamber B into two independent sub-heating chambers; Each sub-heating chamber is provided with N support members (4) with one end open, and the N support members (4) separate the sub-heating chamber into N+1 sub-chambers, where N≥1; The positions of the opening ends of every two adjacent support members (4) are different, and the multiple opening ends and N+1 sub-cavities form an S-shaped steam flow channel connected to the bottom heating cavity A; The inlet (5) of the steam flow channel of each sub-heating chamber is arranged near the center of the bottom of the tank body (14), and the outlet of the steam flow channel is arranged near the head position of the tank body (14); The annular drainage groove-shaped member (3) is provided with a first condensed water circulation hole (6) connected to at least one sub-chamber, and a second condensed water circulation hole (7) connected to the bottom heating chamber A; A condensed water outlet (8) is provided in the middle of the bottom heating shell (1).

2. The external heating device for a tank truck tank body according to claim 1, characterized in that: It also includes a plurality of external pillow heating shells (9), which are respectively arranged on the outside of each sub-heating chamber and are sealed and connected to the external pillow part of the tank body (14) to form an external pillow heating chamber C; each external pillow heating chamber C is connected to the corresponding sub-heating chamber; each external pillow heating shell (9) is provided with a steam outlet (10), and the steam outlet (10) is arranged near the head of the tank body (14).

3. The external heating device for the tank body of a tank truck according to claim 2, characterized in that: A flow guide (11) is also provided in the sub-heating chamber, the inlet end of the flow guide is close to the inlet (5) of the steam flow channel, and the outlet end of the flow guide is close to both the bottom heating chamber A and the pillow outer heating chamber C.

4. The external heating device for the tank body of a tank truck according to claim 3, characterized in that: The plurality of support members (4) are all made of channel steel, one edge of the opening side of each channel steel is fully welded to the tank body (14), and the other edge is intermittently welded to the tank body (14), and a plurality of notches (12) are provided on the edge.

5. The external heating device for the tank body of a tank truck according to claim 4, characterized in that: The inlet (5) of the steam flow channel is provided with a stainless steel braided hose (13) for connecting to an external steam main pipe.

6. The external heating device for the tank body of a tank truck according to any one of claims 1 to 5, characterized in that: The annular drainage groove-shaped member (3) is made of annular channel steel.

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