CN213396733U

CN213396733U - Metal anti-corrosion protection structure and shell-and-tube heat exchanger with same

Info

Publication number: CN213396733U
Application number: CN202021119723.0U
Authority: CN
Inventors: 陈龙; 覃正乐
Original assignee: Zhejiang Intech Technology Co Ltd
Current assignee: Zhejiang Intech Technology Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-06-08
Anticipated expiration: 2030-06-16

Abstract

The utility model relates to a heat exchanger field especially relates to a metal anticorrosion protection architecture and have shell and tube heat exchanger of this structure. The heat exchanger can adopt the technology of 'sacrificial anode' to carry out anticorrosion protection on the copper pipe, but the phenomenon that the anode block is not supplemented timely after being consumed often occurs. In order to solve the problems, the utility model adopts a metal anti-corrosion protection structure with a fixed plug, which comprises an anode block, a pipe joint and a fixed plug, wherein the anode block is fixed on a through hole of the pipe joint; the anode block is a metal anode block with higher activity than copper; the fixed plug is arranged on the outer side of the outer end of the anode block, the fixed plug is connected with the pipe joint and abuts against the outer end face of the anode block, a drainage channel is arranged in the fixed plug, an inner port of the drainage channel abuts against the outer end face of the anode block, and an outer port is communicated with the outer space of the fixed plug. The invention can control the consumption of the anode block through the arrangement of the drainage channel, so that the metal anti-corrosion protection structure is more reliable.

Description

Metal anti-corrosion protection structure and shell-and-tube heat exchanger with same

Technical Field

The utility model relates to a heat exchanger field especially relates to an use metal anticorrosion protection structure of fixed end cap in area on shell and tube heat exchanger.

Background

The water side of the shell and tube heat exchanger is communicated with a water system at a user end, and can be influenced by the water quality of a user, if the water quality of the user is poor, a copper tube of the heat exchanger can be corroded, and the copper tube of the heat exchanger is leaked and fails. To protect the copper tubing from corrosion, the heat exchanger may employ a "sacrificial anode" technique to protect the copper tubing. For example, the technical proposal disclosed in the Chinese utility model patent with the publication number of "CN 2876687Y" and named as "magnesium anode and metal coating protection heat exchanger", an anode block is arranged in the heat exchanger, and the copper pipe is protected by preferential corrosion of the anode block. In the scheme, the anode block adopts metal magnesium with activity greater than that of copper, and when corrosive user water quality appears, the metal magnesium replaces copper to react with corrosive chemical substances in water firstly, so that the corrosive substances are consumed to achieve the effect of protecting the copper pipe.

In a similar scheme, the anode block is a consumable, and the water quality of inlet water is uncontrollable, so that the supplement and replacement time of the anode block is not fixed, and the corrosion event of the copper pipe caused by untimely supplement of the anode block is easy to occur. In the prior art, the shell and tube heat exchanger has no ready anode block consumption early warning structure.

Disclosure of Invention

In order to solve the above problem, an object of the present invention is to provide a metal anti-corrosion protection structure and a shell-and-tube heat exchanger having the same.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a metal anti-corrosion protection structure with a fixing plug comprises an anode block, a pipe joint and the fixing plug, wherein the anode block is fixed on a through hole of the pipe joint; the anode block is a metal anode block with activity higher than that of copper; the fixed plug is arranged on the outer side of the outer end of the anode block, the fixed plug is connected with the pipe joint and abuts against the outer end face of the anode block, a drainage channel is arranged in the fixed plug, an inner port of the drainage channel abuts against the outer end face of the anode block, and an outer port is communicated with the outer space of the fixed plug.

The metal anti-corrosion protection structure in the scheme is arranged on the pipe joint, and the inner side of the pipe joint is filled with water. When the pipe joint is initially set, the metal anode block and/or the fixed plug a through hole which is communicated with the inner area and the outer area on the pipe joint, and the inner end of the metal anode block is positioned in the water injection area. Because the anode block is more active than metal copper, when the anode block contacts with water, the anode block preferentially reacts with corrosive chemical substances in the water, and the corrosive chemical substances are consumed to realize the corrosion prevention of the copper pipe. The anode block is preferably made of metal zinc or metal magnesium. For fixing the anode block, a fixing plug is arranged at the upper end of the anode block, threads are circumferentially arranged on the fixing plug, and the fixing plug is in threaded connection with the pipe joint. The inner end face of the fixed plug abuts against the outer end face of the anode block, and the anode block is prevented from being separated upwards through limiting. The fixed plug is also provided with a drainage channel, the water inlet of the drainage channel is abutted against the outer end face of the anode block, the water outlet of the drainage channel is communicated with the outer area of the pipe joint, and when the anode block is not worn, the water inlet of the drainage channel is sealed by the anode block. After the anode block is worn out, a water inlet of the drainage channel is opened, and due to water pressure, water in the water injection area flows to the outer area through an opening in the drainage channel to prompt the replacement of the anode block.

According to the invention, through the arrangement of the drainage channel, the consumption of the anode block is not uncontrollable, the technical effect that the anode block needs to be replaced is successfully realized by transmitting a signal outwards when the anode block is consumed to a specific degree, and the metal anti-corrosion protection structure is more reliable. Meanwhile, the technical scheme also fills the blank of the consumption early warning structure of the anode block of the shell-and-tube heat exchanger, and solves the main technical problem concerned by the technical scheme.

Further, a sealing part is arranged at the joint of the side wall of the anode block and the pipe joint. The sealing part is arranged between the anode block and the pipe joint, and the sealing part ensures the isolation of the outer region and the water injection region, so that the liquid signal for replacing the anode block cannot be misreported, and the accuracy of early warning is ensured.

Further, the outer side part of the anode block is provided with a sealing surface corresponding to the pipe joint, and the sealing part is arranged on the sealing surface. The sealing surface is often a stepped surface or an inclined surface provided on the anode block and the pipe joint, respectively, so that the sealing member is provided with an upward supporting force, is not easy to slip, and also increases the width of the water blocking tape.

Furthermore, a water outlet communicated with a drainage channel is formed in the fixed plug, and the drainage channel is communicated with the external space of the fixed plug through the water outlet. The drainage channel is provided with a water outlet, and the water outlet provides a certain space for installing drainage equipment, pressure detection equipment or other related equipment.

Furthermore, a drainage interface and/or a pressure detection meter which can be mechanically connected with external drainage equipment are arranged at the water outlet. The drainage instrument can be connected through the drainage interface. When water flows out from the drainage apparatus, the anode block is prompted to be replaced. Meanwhile, the drainage interface is arranged to prevent accumulated water from flowing into the outer area to cause damage to parts such as electrical elements in the outer area. Meanwhile, overflow liquid can be transferred to a visible liquid storage area through drainage equipment, and the visualization of the early warning signal is realized by observing the change of the liquid level. The early warning can also be carried out by setting a pressure detection meter. When the anode block needs to be changed, the drainage channel is opened, water gushes into the outside region through the drainage channel from the water injection district, forms water pressure to the drainage channel, and at this moment, the manometer number of degrees increases, and the change of through-number becomes visual signal with early warning signal, transmits for operating personnel. Drainage interface and manometer can set up simultaneously or an option setting to realize the visual of overflow signal.

Furthermore, a drain hole is formed in the anode block, the closed inner end of the drain hole is arranged inside the anode block, and the outer end of the opening is communicated with the water inlet of the drain channel. If the anode block is not expected to be warned after being completely consumed, the drain hole can be formed in the anode block, and when the anode block is corroded to open the drain hole, an overflow signal is generated to prompt the replacement of the anode block. The arrangement mode provides buffering between signal transmission and anode block replacement, so that the degree of anode block replacement is controllable, and early warning is realized.

Furthermore, the anode block is a metal block which is symmetrically arranged along the circumferential direction of the central shaft, and the water drain holes are arranged at the positions of the anode block, which axially extend from the central symmetric shaft. The anode blocks are symmetrically arranged along the central axis, so that the corrosion distribution of the anode blocks is uniform, and the drain holes are arranged at the extended positions of the central axis, so that the positions of the drain holes are positioned in the middle of the cross section of the anode blocks, the anode block waste caused by advanced drainage when the anode blocks are not uniformly corroded is avoided, and the utilization rate of the anode blocks is improved.

Furthermore, the pipe joint is fixed on a through hole on the side wall of the cavity, and the inner end of the anode block is positioned in the cavity. The pipe joint can be arranged on the side wall of the cavity of the tube-shell heat exchanger, and a water injection area is arranged in the cavity.

Furthermore, two jaws are arranged on the outer end face of the anode block, and a clamp can extend into the jaws to take and place the anode block. Because the anode block is arranged in the pipe joint, the upper end of the anode block is also provided with the fixed plug, the anode block is deeply sunk into the pipe joint, and is not easy to take out by hands during replacement. The arrangement of the jaw enables the anode block to be taken and placed through the clamp to penetrate into the jaw to clamp the anode block, so that the anode block is more convenient to replace.

A shell and tube heat exchanger comprises a metal anti-corrosion protection structure with a fixed plug, wherein the metal anti-corrosion protection structure is any one of the metal anti-corrosion protection structures. The metal anti-corrosion protection structure can be arranged on a shell and tube heat exchanger to form the shell and tube heat exchanger capable of prompting the replacement of the anode block.

The utility model adopts the above technical scheme, following beneficial effect has been realized: on the premise of ensuring that the anode block ensures that the copper pipe is not corroded in a mode of sacrificing an anode, 1, early warning of anode block loss is realized, and a replacement signal of the anode block is converted into a visual signal through various implementation modes, so that the technical problem is solved, and the loss of the anode block is controllable; 2. a stable and convenient anode block placing mode is arranged; 3. the sealing component is arranged to effectively isolate the dry area from the water injection area when in use, so that the operation of the equipment is not interfered by water seepage; 4. the copper pipe of the shell and tube heat exchanger can be effectively protected when the copper pipe is assembled on the shell and tube heat exchanger, the copper pipe is prevented from being corroded, the protection block can also give an early warning in time when the copper pipe is worn out and needs to be replaced, and the copper pipe corrosion condition caused by excessive consumption of the anode block is avoided.

Drawings

FIG. 1 is a cross-sectional view of one embodiment of a metal corrosion protection structure with a fixed plug according to the present invention;

FIG. 2 is a cross-sectional view of another embodiment of the metal corrosion protection structure with a fixed plug according to the present invention;

fig. 3 is a schematic structural diagram of an anode block according to the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not 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, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

As shown in fig. 1 and fig. 3, the metal anti-corrosion protection structure with the fixing plug is arranged on a shell-and-tube heat exchanger, and comprises an anode block 3, a pipe joint 2 and a fixing plug 4, wherein the anode block 3 is fixed on a through hole of the pipe joint 2; the pipe joint 2 is fixed on a through hole of the side wall 1 of the cavity, and the inner end of the anode block 3 is positioned in the cavity. The anode block 3 is a metal magnesium anode block 3 with activity higher than that of copper; the fixed plug 4 is arranged on the outer side of the outer end of the anode block 3, the fixed plug 4 is connected with the pipe joint 2 and abuts against the outer end face of the anode block 3, a drainage channel 6 is arranged in the fixed plug 4, an inner port of the drainage channel 6 abuts against the outer end face of the anode block, and an outer port is communicated with the outer space of the fixed plug 4. And a sealing part 5 is arranged at the joint of the side wall of the anode block 3 and the pipe joint 2. The outer side part of the anode block 3 is provided with a sealing surface corresponding to the pipe joint 2, and the sealing part 5 is arranged on the sealing surface. The fixed plug 4 is provided with a water outlet 7 communicated with the drainage channel 6, and the drainage channel 6 is communicated with the external space of the fixed plug through the water outlet 7. And a drainage interface and a pressure detection meter which can be mechanically connected with external drainage equipment are arranged at the water outlet 7. The anode block is provided with a drain hole 8, the closed inner end of the drain hole 8 is arranged inside the anode block, and the outer end of the opening is communicated with the water inlet of the drain channel 6. The anode block 3 is a metal block symmetrically arranged along the circumferential direction of the central shaft, and the drain hole 8 is arranged at the position of the anode block 3 where the central symmetrical shaft axially extends. Two jaws 9 are arranged on the outer end face of the anode block, and a clamp can extend into the jaws 9 to take and place the anode block.

Specifically, in the above scheme, the chamber is partitioned from the outside of the chamber by the side wall of the chamber, and the chamber is filled with water. The part of the anode block close to the inside of the cavity is an inner part, and the part close to the outside of the cavity is an outer part. The connection mode of the fixed plug and the pipe joint can be various in threaded connection, socket connection and the like, and threaded connection is adopted in the embodiment. The anode block can be made of any metal which does not react with pure water and has higher activity than copper, the metal which is easily available in common metals and can be used as the anode block metal is zinc or magnesium, and magnesium is selected as the anode block material in the embodiment. The manner of converting the overflow signal of anode block wear into a visual signal includes, but is not limited to, draining and by observing the level height of the draining reservoir or by a pressure gauge. In the embodiment, an implementation mode combining two methods is adopted, so that the anode block loss signal can be read from two places, and double insurance is realized. The anode block is provided with drain holes, the anode block is a metal block which is symmetrically arranged along the circumferential direction of the central shaft, and the drain holes are arranged at the position of the anode block, which axially extends from the central symmetry shaft. The metal blocks are symmetrically arranged along the central axis, so that the corrosion distribution of the metal blocks is uniform, the utilization rate of the anode blocks is improved, the drain holes are arranged on the central symmetry axis, the positions of the drain holes are positioned in the middle of the cross section of the anode blocks, the anode block waste caused by advanced drainage when the anode blocks are not uniformly corroded is avoided, and the utilization rate of the anode blocks is improved. In addition, through the control to anode block change frequency, the metal anticorrosion protection structure of setting on shell and tube heat exchanger can also play the effect of water quality control. Under normal water quality, the replacement frequency of the anode blocks is changed once a year, when the water quality is abnormal and the corrosivity is enhanced, the consumption speed of the anode blocks can be changed, a user is prompted that the water quality is in a problem, and the water quality needs to be treated or a water source needs to be replaced.

When the metal anti-corrosion protection structure is actually used, the metal anti-corrosion protection structure is arranged on the side wall of the cavity of the heat exchanger, the cavity on the inner side of the cavity is filled with water, the cavity on the outer side of the cavity is outside the cavity, and the pipe joint is arranged at the connecting through hole to be connected with the metal anode block. When the pipe joint is initially set, the fixed plug is installed on the pipe joint and plugs a through hole communicated with the inside and the outside of the cavity, the fixed plug is connected to the outer end of the metal anode block, the inner end face of the fixed plug is abutted to the outer end face of the metal anode block, and the fixed plug is connected to the pipe joint through threads to prevent the anode block from displacing in a limiting mode. The inner end of the anode block is positioned in the water injection area in the cavity, and the anode block is more active than metal copper and preferentially reacts with corrosive chemical substances in water when contacting with water, so that the corrosion of the copper pipe is realized by consuming the corrosive chemical substances. The sealing component is arranged between the anode block and the pipe joint, and the isolation of the inner dry area and the outer dry area of the cavity and the water injection area is ensured by the sealing component, so that the false alarm can not occur on the liquid signal for replacing the anode block, and the accuracy of early warning is ensured. The seal member is disposed on the seal face. The sealing surface is often a stepped surface or a beveled surface, in this embodiment a bevel surface, provided on the anode block and the pipe joint, respectively. The arrangement is such that the sealing member provides an upward supporting force, so that the water blocking tape is not easy to slip off, and the width of the water blocking tape is increased. The anode block is provided with a drain hole, the inner end of the drain hole is arranged in the anode block, when the anode block is worn to the inner end of the drain hole, a closed port of the drain hole is opened, and due to water pressure, water in the cavity flows to the drainage channel through the drain hole and flows out of the cavity through the drainage channel, so that the replacement of the anode block is prompted. The outer end of the drainage channel is provided with a water outlet, and a certain space is reserved at the water outlet for external equipment. The water outlet is provided with a drainage interface and a pressure gauge, and an overflow signal is converted into an externally visible signal through drainage and pressure registration to prompt the replacement of the anode block. The consumption degree of the anode block during replacement early warning can be adjusted by adjusting the arrangement position of the inner end of the drain hole. Two jaws are arranged on the outer end face of the anode block, and a clamp can extend into the jaws to take and place the anode block, so that the anode block is more convenient to replace.

According to the invention, through the arrangement of the drain holes and the drain channels, the consumption of the anode block is not controllable any more, the technical effects of transmitting a signal outwards when the anode block is consumed to a specific degree and prompting the replacement of the anode block are successfully realized, and the metal anti-corrosion protection structure is more reliable. Meanwhile, the technical scheme also fills the blank of the consumption early warning structure of the anode block of the shell-and-tube heat exchanger, and solves the main technical problem concerned by the technical scheme.

Example 2

As shown in fig. 2, the structure of example 2 for protecting a metal from corrosion with a fixed plug is different from that of example 1 in that a drain hole is not provided in the inside of the anode block. This arrangement allows a greater range of anode block options and allows the use of more versatile anode blocks.

Example 3

A shell and tube heat exchanger comprises a metal anti-corrosion protection structure with a fixed plug, wherein the metal anti-corrosion protection structure with the fixed plug is described in embodiment 1 or embodiment 2.

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 do not necessarily 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.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. The utility model provides a metal anticorrosion protection architecture, includes positive pole piece (3), coupling (2) and fixed end cap (4), its characterized in that: the anode block (3) is fixed on the through hole of the pipe joint (2); the anode block (3) is a metal anode block (3) with the activity higher than that of copper; the anode block is characterized in that the fixed plug (4) is arranged on the outer side of the outer end of the anode block (3), the fixed plug (4) is connected with the pipe joint (2) and abuts against the outer end face of the anode block (3), a drainage channel (6) is arranged in the fixed plug (4), an inner port of the drainage channel (6) abuts against the outer end face of the anode block, and an outer port is communicated with the outer space of the fixed plug (4).

2. The metal corrosion protection structure of claim 1, wherein: and a sealing part (5) is arranged at the joint of the side wall of the anode block (3) and the pipe joint (2).

3. The metal corrosion protection structure of claim 2, wherein: the outer side part of the anode block (3) is provided with a sealing surface corresponding to the pipe joint (2), and the sealing part (5) is arranged on the sealing surface.

4. The metal corrosion protection structure of claim 1, wherein: the fixed plug (4) is provided with a water outlet (7) communicated with the drainage channel (6), and the drainage channel (6) is communicated with the outer space of the fixed plug through the water outlet (7).

5. The metal corrosion protection structure of claim 4, wherein: and a drainage interface and/or a pressure detection meter which can be mechanically connected with external drainage equipment are/is arranged at the water outlet (7).

6. The metal corrosion protection structure of claim 1, wherein: the anode block is provided with a drain hole (8), the closed inner end of the drain hole is arranged inside the anode block, and the outer end of the opening is communicated with the water inlet of the drain channel (6).

7. The metal corrosion protection structure of claim 6, wherein: the anode block (3) is a metal block which is symmetrically arranged along the circumferential direction of the central shaft, and the drain holes (8) are arranged at the positions of the anode block (3) where the central symmetrical shaft axially extends.

8. The metal corrosion protection structure of claim 1, wherein: the pipe joint (2) is fixed on a through hole of the side wall (1) of the cavity, and the inner end of the anode block (3) is positioned in the cavity.

9. The metal corrosion protection structure of claim 1, wherein: two jaws (9) are arranged on the outer end face of the anode block, and a clamp can extend into the jaws to take and place the anode block.

10. A shell and tube heat exchanger which is characterized in that: comprising a metal corrosion protection structure according to any one of claims 1 to 9.