CN211205027U

CN211205027U - Novel connecting structure for ball sealing head and tube plate of heat exchanger

Info

Publication number: CN211205027U
Application number: CN201921995554.4U
Authority: CN
Inventors: 曾玲芝; 覃琴; 冯宇
Original assignee: Changsha Weizhong Chemical Machinery Co ltd
Current assignee: Changsha Weizhong Chemical Machinery Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-08-07
Anticipated expiration: 2029-11-18

Abstract

The utility model provides a novel connection structure for a ball sealing head and a tube plate of a heat exchanger, which comprises a ball sealing head and a bowl-shaped tube plate, wherein the round spherical surface of the ball sealing head is connected with one surface of a bowl opening of the tube plate, and the joint is sealed by welding; the utility model provides a pair of a novel a connection structure for ball sealing head and tube sheet of heat exchanger, ball sealing head adopt the ball structure of lacking, and ball sealing head center falls on the tube sheet, regards pipe case drum position as ball sealing head stress position promptly, takes the heat exchanger of the connection structure preparation of ball sealing head and tube sheet, basically each equipment can practice thrift about 3.5 ~ 4 ten thousand yuan, has that manufacturing cycle is shorter, and the manufacturing degree of difficulty is lower, save material, and is sealed effectual, advantages such as manufacturing cost is lower.

Description

Novel connecting structure for ball sealing head and tube plate of heat exchanger

Technical Field

The utility model relates to a heat exchanger equipment technical field especially relates to a novel a connection structure for ball sealing head and tube sheet of heat exchanger.

Background

The heat exchanger is one of unit equipment widely applied in various industries such as chemical industry, petroleum, energy and the like, and plays a significant role in product quality, energy utilization rate and system economy in the fields of national economy and industrial production. Along with the continuous development of the industrial scale of the heat exchanger in China, the competition of the industry is increasingly intense. The development of new products with high efficiency and energy conservation becomes a means for enterprises to win competition. The cost structure of the heat exchanger is comprehensively analyzed, the main cost is formed by the tube box and the tube bundle part, wherein the optimization difficulty of the tube bundle part is very high, and therefore the design of the tube box structure is very critical to cost control. The structural design idea of the tube box part is to meet the process requirements of users on the premise of sufficient strength, and the structural design is optimized as much as possible to save materials and reduce the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem that prior art exists, the utility model discloses a technical scheme as follows:

1. design parameters and calculated thickness

a) The design pressure of the tube side is 31.4MPa, the design temperature is 50 ℃, and the diameter of the equipment is DN1600 mm.

b) The ball sealing head is Q345R, and the checking solid content gauge table is 60mm-100mm under the design temperature [ sigma ]]^t181MPa, 100mm-150mm design temperature [ sigma ]]^t178 MPa; the tube plate is made of 20MnMo materials, and a solid tolerance gauge table is searched: design temperature [ sigma ]]^t＝189MPa。

c) And calculating according to a GB/T150-2011 formula (3-8) to obtain the seal head thickness e which is 75 mm. The actual blanking thickness required for the ball sealing head is 90mm, taking into account the amount of thinning required for stamping.

And calculating the thickness of the tube plate cylinder to be 148mm according to the GB/T150-2011 formula (3-1).

d) The known tube sheet thickness is calculated to be 450mm and is made of 20MnMoIV forgings.

2. Structural emphasis and concept of solutions

Structural difficulties of high-pressure heat exchangers: because the ball seal head is well stressed, the calculated thickness of the ball seal head is only half of that of the equal-diameter cylinder, and the control of the connection transition structure of the ball seal head and the tube plate is a key point. The utility model adopts the technical scheme as follows:

the utility model provides a novel a connection structure that is used for ball head and tube sheet of heat exchanger, includes the tube sheet of ball head and calathiform, the circular sphere of ball head with the one side of the calathiform mouth of tube sheet is connected, and the junction passes through welded seal, the ball head is the segment shape, just the ball center of ball head is located on the tube sheet.

In one embodiment, the side wall thickness of the ball sealing head is 90mm, the inner cavity diameter is 1600mm, and the side wall thickness of the tube plate is 460mm, and the outer diameter is 1780 mm.

Compared with the prior art, the utility model provides a pair of a novel a connection structure for ball sealing head and tube sheet of heat exchanger, ball sealing head adopt the segment structure, and ball sealing head center falls on the tube sheet, regards pipe case drum position as ball sealing head stress position promptly, takes the heat exchanger of the connection structure preparation of ball sealing head and tube sheet, basically each equipment can practice thrift about 3.5 ~ 4 yuan, has that manufacturing cycle is shorter, and the manufacturing degree of difficulty is lower, save material, and is sealed effectual, advantage such as manufacturing cost is lower.

Drawings

FIG. 1 is a schematic view of the present invention in a partial cross-sectional structure;

fig. 2 is a partial sectional structural view of a conventional connection structure of a ball head and a tube plate.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1 and fig. 2, for convenience of description, the references of "up", "down", "left", "right", "front" and "rear" directions in the present invention are based on the directions shown in fig. 1;

as shown in fig. 1, a novel connection structure for a ball sealing head and a tube plate of a heat exchanger comprises a ball sealing head 1 and a bowl-shaped tube plate 2, wherein a circular spherical surface of the ball sealing head 1 is connected with one surface of a bowl opening of the tube plate 2, a joint is sealed by welding, the ball sealing head 1 is in a ball-segment shape, and a ball center of the ball sealing head 1 is located on the tube plate 2.

The required dimensions of the channel box parts of the equipment are as follows: the thickness of the ball end socket is 90mm, the diameter is DN1600, the material is Q345R, the weight of the hemispherical end socket is 3200Kg, the weight of the blank to be purchased is 4070Kg, and the unit price is about 3.6 ten thousand yuan; the thickness of the tube plate is 460mm, the external diameter is phi 1780, the weight of the bought blank is 10500Kg, the unit price is about 13.4 ten thousand yuan, namely the total price of the bulb sealing head 1 and the tube plate 2 in the tube box is about 17 ten thousand yuan.

As shown in fig. 2, the existing connection structure of a ball seal head and a tube plate for a heat exchanger includes a hemispherical ball seal head 1 and a bowl-shaped tube plate 2, a circular spherical surface of the ball seal head 1 is connected with one surface of a bowl opening of the tube plate 2, a connection part is sealed by welding, and a thickened ball seal head 1 is adopted, that is, the thickness of the ball seal head 1 is consistent with the thickness of a cylinder of the tube plate 2;

the required dimensions for the parts in the piece of equipment tube box are then: the thickness of the spherical end socket 1 is 148mm, the diameter is DN1600, the material is Q345R, the weight of the hemispherical spherical end socket is 5600Kg, the weight of a blank to be purchased is 6700Kg, and the unit price is about 6 ten thousand yuan; the thickness of the tube plate 2 is 450mm, the outer diameter is phi 1896, the weight of the blank is 11450Kg, the unit price is about 15 ten thousand yuan, namely the total price of the bulb end socket 1 and the tube plate 2 in the tube box is about 21 ten thousand yuan.

Through the technical scheme of the utility model can with current technical scheme after contrasting: adopt the heat exchanger of connection structure preparation of ball sealing head and tube sheet, basically each equipment can practice thrift about 4 ten thousand yuan of cost, also have simultaneously that manufacturing cycle is shorter, the manufacturing degree of difficulty is lower, save material, sealed effectual, manufacturing cost advantage such as lower.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a novel a connection structure that is used for ball head and tube sheet of heat exchanger, includes the tube sheet of ball head and calathiform, the circular sphere of ball head with the one side of the calathiform mouth of tube sheet is connected, and the junction passes through welded seal, its characterized in that, the ball head is the segment shape, just the ball center of ball head is located on the tube sheet.

2. The novel connecting structure for the ball sealing head and the tube plate of the heat exchanger as claimed in claim 1, wherein the thickness of the side wall of the ball sealing head is 90mm, the diameter of the inner cavity is 1600mm, and the thickness of the side wall of the tube plate is 460mm and the outer diameter is 1780 mm.