CN210625017U - Dry-type evaporator front tube box - Google Patents
Dry-type evaporator front tube box Download PDFInfo
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- CN210625017U CN210625017U CN201921406183.1U CN201921406183U CN210625017U CN 210625017 U CN210625017 U CN 210625017U CN 201921406183 U CN201921406183 U CN 201921406183U CN 210625017 U CN210625017 U CN 210625017U
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Abstract
The utility model belongs to the technical field of the refrigeration, a dry-type evaporimeter front tube case is related to, mainly comprises outlet duct, flat lid, feed liquor pipe, nipple joint, journey baffle, pipe case flange, lower baffle, knockout, apron and filter plate. After the refrigerant liquid enters the space at the lower part of the pipe box, the cover plate is impacted, the refrigerant liquid realizes 90-degree turning, and the refrigerant liquid is radially dispersed along the through hole on the liquid distributor, so that the liquid is uniformly distributed; after the refrigerant liquid is accumulated in an area defined by the short section, the split-range partition plate, the lower partition plate and the filter plate, the refrigerant liquid finally flows into the heat exchange tube through the circular through hole on the filter plate to form complete coverage on the heat exchange tube bundle, and stable and continuous refrigerant liquid supply is kept.
Description
Technical Field
The utility model belongs to the technical field of the refrigeration, a dry-type evaporator front tube case is related to.
Background
The dry shell-and-tube evaporator is a heat exchanger commonly used in screw refrigerating medium (cold water, brine, glycol and the like) units. Refrigerant liquid enters a tube pass of the dry evaporator from a refrigerant inlet positioned at the lower part of a front tube box of the dry evaporator (generally 2 flows are arranged), then flows into a heat exchange tube, turns in a rear tube box, continuously absorbs the heat of secondary refrigerant outside the tube in the flowing process, gradually changes into a gas-liquid mixed state or a complete gas state, finally flows out from a refrigerant outlet at the upper part of the tube box, and enters the compressor. The secondary refrigerant flows on the shell side of the tube, and segmental baffle plates which are arranged in a vertically crossed mode are arranged in the shell and cross over the tube bundle for enhancing heat exchange.
Compared with a flooded evaporator, the dry evaporator has the advantages of small refrigerant filling amount, complete evaporation and the like. But the refrigerant liquid distribution of the dry evaporator is an important factor affecting the heat exchange efficiency of the entire heat exchanger. Namely: after the refrigerant liquid enters the front tube box, the refrigerant liquid is uniformly distributed before entering the heat exchange tube bundle, the phenomenon that the heat exchange tube is far away from the center is avoided as much as possible, the heat exchange tubes at the edge positions have no liquid or less liquid, the refrigerant liquid distributed by the heat exchange tubes is ensured to be uniform as much as possible, and the heat exchange effect of each heat exchange tube is fully exerted.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a dry evaporator front tube box.
The technical scheme of the utility model:
a front tube box of a dry evaporator mainly comprises an air outlet tube 1, a flat cover 2, a liquid inlet tube 3, a short section 4, a pass partition plate 5, a tube box flange 6, a lower partition plate 7, a liquid distributor 8, a cover plate 9 and a filter plate 10.
The short section 4 is of a tubular structure, and a flat cover 2 and a pipe box flange 6 are welded at two ends of the short section respectively; a horizontally arranged pass partition plate 5 is welded in the short section 4, the pass partition plate 5 is positioned on the horizontal central line of a pipe box flange 6, one end of the pass partition plate 5 is welded with the end surface of the inner side of the flat cover 2, the other end of the pass partition plate is welded with the inner surface of the pipe box flange 6 and is flush with the sealing surface of the pipe box flange 6, and the short section 4 is divided into an upper space and a lower space with the same volume by the pass partition plate 5; the flat cover 2 is provided with two through holes which are respectively used for installing an air outlet pipe 1 and a liquid inlet pipe 3, and the air outlet pipe 1 and the liquid inlet pipe 3 are respectively positioned at the upper part and the lower part of the short section 4; the gas outlet pipe 1 is flush with the inner side end face of the flat cover 2, and the liquid inlet pipe 3 extends into the short section 4 and is communicated with the liquid separator 8.
The lower partition plate 7 is a semicircular plate and is vertically welded in a space at the lower part of the short section 4, the diameter edge and the circular arc edge of the lower partition plate 7 are respectively welded with the lower surface of the split partition plate 5 and the inner wall of the short section 4 into a whole, and the lower part of the short section 4 is divided into a left space and a right space; the lower baffle 7 is provided with a circular through hole for installing a liquid separator 8, the circular through hole is coaxial with the liquid inlet pipe 3, and the circular through hole and the liquid inlet pipe are the same in size.
The liquid distributor 8 is of a tubular structure and is welded in the circular through hole of the lower baffle plate 7; one end of the two ends of the liquid separator 8 is welded with the end part of the liquid inlet pipe 3 into a whole, and the other end is welded with the cover plate 9 to realize plugging; a plurality of rows of through holes are uniformly distributed in the circumferential direction on the liquid distributor 8, and the through holes are all positioned on the same side of the lower partition plate 7 and close to one end of the pipe box flange 6; the lower partition plate 7 above the liquid separator 8 is provided with a plurality of through holes for overflowing the refrigerant liquid on the side of the pipe box flange 6 after being fully accumulated, thereby playing a role of buffering.
The filter plate 10 is a semicircular plate, is vertically welded in the lower space of the short section 4, is positioned on the outer side of the cover plate 9 and is close to the pipe box flange 6; the diameter edge and the circular arc edge of the filter plate 10 are respectively welded with the lower surface of the split-ranging partition plate 5 and the inner wall of the short section 4 into a whole; the filter plate 10 is provided with a plurality of circular through holes, and the number and the positions of the circular through holes correspond to the heat exchange tubes 11 below the range partition plate 5.
The number of the through holes on the liquid distributor 8 is 3, 8 in each row, wherein the through holes in the middle row are arranged in a crossed manner with the other two rows; the sum of the areas of all the through holes on the liquid distributor 8 is equal to or slightly larger than the section area of the liquid inlet pipe 3.
The gas outlet pipe 1, the liquid inlet pipe 3 and the liquid separator 8 are made of carbon steel seamless steel pipes.
The flat cover 2, the short section 4, the split-range partition plate 5, the lower partition plate 7, the cover plate 9 and the filter plate 10 are made of steel plates special for the pressure vessel.
The working principle is as follows: after the refrigerant liquid enters the lower space of the short section 4, the refrigerant liquid impacts the cover plate 9, the refrigerant liquid is turned for 90 degrees, and the refrigerant liquid is radially dispersed along the through hole on the liquid distributor 8. If the cover plate 9 is not arranged, a part of refrigerant liquid directly enters the heat exchange tube on the front surface of the liquid inlet tube 3, and the uniform distribution of the liquid is influenced.
The refrigerant liquid is continuously accumulated in the area surrounded by the short section 4, the split partition plate 5, the lower partition plate 7 and the filter plate 10, the liquid level of the refrigerant in the area is gradually increased, and finally the refrigerant flows into the heat exchange tubes 11 through the circular through holes on the filter plate 10 to form complete coverage of the heat exchange tube bundle and maintain stable and continuous refrigerant liquid supply.
The utility model has the advantages that: through the front tube box of the dry-type evaporator, after the refrigerant liquid enters the lower space of the tube box, the cover plate is impacted, the refrigerant liquid realizes 90-degree steering, and the refrigerant liquid is radially dispersed along the through hole on the liquid distributor, so that the liquid is uniformly distributed; after the refrigerant liquid is accumulated in an area defined by the short section, the split-range partition plate, the lower partition plate and the filter plate, the refrigerant liquid finally flows into the heat exchange tube through the circular through hole on the filter plate to form complete coverage on the heat exchange tube bundle, and stable and continuous refrigerant liquid supply is kept.
Drawings
Fig. 1 is a front view and a partial sectional view of the present invention.
Fig. 2 is a front view of the liquid distributor of the present invention.
Fig. 3 is a schematic view of the installation and the flow direction of the refrigerant according to the present invention.
In the figure: 1, an air outlet pipe; 2, flat covering; 3, a liquid inlet pipe; 4, short sections; 5, a partition board with a split range; 6, a pipe box flange; 7, a lower partition plate; 8, a liquid separator; 9, covering a plate; 10, filtering the plate; 11 heat exchanging pipes.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
As shown in fig. 1, the gas outlet pipe 1, the liquid inlet pipe 3 and the liquid separator 8 are all made of carbon steel seamless steel pipes; the flat cover 2, the short section 4, the split-range partition plate 5, the lower partition plate 7, the cover plate 9 and the filter plate 10 are all made of special steel plates for the pressure vessel; the pipe box flange 6 is a pressure vessel flange with national standard, and the parts are connected with each other through a welding process. Wherein: the air outlet pipe 1 extends into the flat cover 2 and is flush with the end face at the right side of the flat cover 2; the liquid inlet pipe 3 extends into the flat cover 2, extends out and is communicated with the liquid separator 8; the split-ranging partition plate 5 is positioned on the horizontal center line of the pipe box flange 6 and is flush with the right sealing surface of the pipe box flange 6, and the whole short section 4 is divided into an upper space and a lower space which are the same in volume by the split-ranging partition plate 5; the lower partition plate 7 is a semicircular steel plate, the lower part of the nipple 4 is divided into a left space and a right space, namely A, B spaces in the drawing 1, a large circular through hole is formed in the lower partition plate 7 and used for installing the liquid distributor 8, and a plurality of small circular through holes are processed in the lower partition plate 7 above the liquid distributor 8.
As shown in fig. 2, the liquid distributor 8 is provided with 3 rows of 24 circular through holes which are uniformly distributed along the circumferential direction, wherein the middle row of through holes is arranged in a crossed manner with the other two rows, and the end face of the right side of the liquid distributor 8 is blocked by a circular cover plate 9; the principle of determining the diameter of the circular through hole on the liquid separator 8 is as follows: the sum of the areas of all the through holes is equal to or slightly larger than the area of the section of the liquid inlet pipe 3, so that the phenomenon that the refrigerant flashes due to the reduction of the flow area is avoided.
As shown in fig. 3, the filter plate 10 is located on the right side of the cover plate 9, and the filter plate 10 is provided with circular holes corresponding to the number and positions of the heat exchange tubes 11 below the pass partition plate 5. After entering the lower space of the nipple 4 from the liquid inlet pipe 3 and the liquid distributor 8, the refrigerant liquid impacts the cover plate 9, the refrigerant liquid turns 90 degrees, and the refrigerant liquid is radially dispersed along the through hole on the liquid distributor 8; the refrigerant liquid is continuously accumulated in a right side area B surrounded by the short section 4, the split-range partition plate 5, the lower partition plate 7 and the filter plate 10, the liquid level of the refrigerant in the area B is gradually increased, and finally the refrigerant flows into the heat exchange tube 11 through the circular through hole on the filter plate 10, and steam formed after heat exchange flows through the upper part of the short section 4 and is discharged from the air outlet tube 1. When the refrigerant is accumulated excessively in the area B immediately after the start of cooling, the refrigerant overflows from the plurality of through holes in the upper portion of the lower partition plate 7 and enters the area a to perform a buffering function.
Claims (3)
1. A front tube box of a dry-type evaporator is characterized by mainly comprising an air outlet pipe (1), a flat cover (2), a liquid inlet pipe (3), a short section (4), a pass partition plate (5), a tube box flange (6), a lower partition plate (7), a liquid distributor (8), a cover plate (9) and a filter plate (10);
the short section (4) is of a tubular structure, and a flat cover (2) and a pipe box flange (6) are welded at two ends of the short section respectively; a horizontally arranged pass partition plate (5) is welded in the short section (4), the pass partition plate (5) is located on the horizontal central line of a pipe box flange (6), one end of the pass partition plate (5) is welded with the inner side end face of the flat cover (2), the other end of the pass partition plate is welded with the inner surface of the pipe box flange (6) and is flush with the sealing surface of the pipe box flange (6), and the pass partition plate (5) divides the short section (4) into an upper space and a lower space which are the same in volume; the flat cover (2) is provided with two through holes which are respectively used for installing an air outlet pipe (1) and a liquid inlet pipe (3), and the air outlet pipe (1) and the liquid inlet pipe (3) are respectively positioned at the upper part and the lower part of the short section (4); the gas outlet pipe (1) is flush with the inner side end face of the flat cover (2), and the liquid inlet pipe (3) extends into the nipple joint (4) and is communicated with the liquid distributor (8);
the lower partition plate (7) is a semicircular plate and is vertically welded in the space at the lower part of the short section (4), the diameter edge and the arc edge of the lower partition plate (7) are respectively welded with the lower surface of the split partition plate (5) and the inner wall of the short section (4) into a whole, and the lower part of the short section (4) is divided into a left space and a right space; the lower partition plate (7) is provided with a circular through hole for mounting a liquid separator (8), the circular through hole is coaxial with the liquid inlet pipe (3), and the circular through hole and the liquid inlet pipe are the same in size;
the liquid distributor (8) is of a tubular structure and is welded in the circular through hole of the lower partition plate (7); one end of each of the two ends of the liquid separator (8) is welded with the end of the liquid inlet pipe (3) into a whole, and the other end of each of the two ends is welded with a cover plate (9) to realize plugging; a plurality of rows of through holes are uniformly distributed on the liquid distributor (8) along the circumferential direction, and the through holes are all positioned at the same side of the lower partition plate (7) and close to one end of the pipe box flange (6); a plurality of through holes are formed in the lower partition plate (7) above the liquid distributor (8) and are used for overflowing refrigerant liquid on the side of the pipe box flange (6) after being fully accumulated, so that a buffering effect is achieved;
the filter plate (10) is a semicircular plate, is vertically welded in the lower space of the short section (4), is positioned on the outer side of the cover plate (9) and is close to the pipe box flange (6); the diameter edge and the circular arc edge of the filter plate (10) are respectively welded with the lower surface of the range partition plate (5) and the inner wall of the short section (4) into a whole; the filter plate (10) is provided with a plurality of round through holes, and the number and the positions of the round through holes correspond to the heat exchange tubes (11) below the pass partition plate (5).
2. A dry evaporator front tube box according to claim 1, characterized in that the liquid distributor (8) has a total of 3 rows of 8 through holes, wherein the central row of through holes is arranged crosswise to the remaining two rows; the sum of the areas of all the through holes on the liquid separator (8) is equal to the cross section area of the liquid inlet pipe (3).
3. The front tube box of the dry evaporator according to claim 1 or 2, characterized in that the air outlet pipe (1), the liquid inlet pipe (3) and the liquid distributor (8) are made of seamless steel pipes made of carbon steel; the flat cover (2), the short section (4), the split-range partition plate (5), the lower partition plate (7), the cover plate (9) and the filter plate (10) are made of steel plates special for the pressure vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921406183.1U CN210625017U (en) | 2019-08-27 | 2019-08-27 | Dry-type evaporator front tube box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921406183.1U CN210625017U (en) | 2019-08-27 | 2019-08-27 | Dry-type evaporator front tube box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210625017U true CN210625017U (en) | 2020-05-26 |
Family
ID=70764944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921406183.1U Active CN210625017U (en) | 2019-08-27 | 2019-08-27 | Dry-type evaporator front tube box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210625017U (en) |
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2019
- 2019-08-27 CN CN201921406183.1U patent/CN210625017U/en active Active
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