A protection device for an evaporation tube on an evaporator

Abstract

This invention provides a protective device for evaporator tubes in an evaporator, belonging to the field of evaporator technology. It includes an evaporator tube installed inside the evaporator, with an insulating substrate attached and sealed to its surface. A base is fixed to the center of the upper end face of the insulating substrate, and a conductive electrode for penetrating and extending into the evaporator tube is fixed to the center of the base. A fixing box is mounted on the base, and a sacrificial anode metal block is inserted into the fixing box. The sacrificial anode metal block elastically abuts against the end of the conductive electrode away from the insulating substrate. The insulating substrate is an arc-shaped patch structure adapted to the evaporator tube, and the insulating substrate and the evaporator tube are sealed using methods including welding and mechanical sealing. This invention, when using a sacrificial anode block for corrosion protection of the evaporator tube, facilitates the installation and removal of the sacrificial anode block, simplifying operation. Furthermore, it can be used with a pressure sensor to monitor the consumption level of the sacrificial anode block in real time, facilitating later maintenance and resulting in good overall performance.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, and in particular to a protective device for the evaporation tubes on an evaporator. Background Technology

[0002] During the operation of the evaporator, the evaporator tube, as a key component, is subjected to specific working conditions for a long time and is susceptible to corrosion and other damage. The inner wall of the evaporator tube is in direct contact with the working medium, and factors such as chemical substances and electrochemical reactions in the medium can cause corrosion of the inner wall of the evaporator tube, thereby affecting the normal operation of the evaporator, shortening its service life, and even potentially causing safety accidents.

[0003] Currently, traditional solutions often involve replacing the entire pipe with corrosion-resistant material or attaching external sacrificial anode blocks. The former is costly and requires a long downtime, while the latter often uses welding or binding to fix the pipe, which requires stopping the machine to remove the insulation layer, damage the original sealing structure, and even cut pipe fittings. A single maintenance can take up to several hours, making maintenance operations cumbersome and inconvenient to use.

[0004] Therefore, this application provides a protective device for the evaporator tubes on an evaporator to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A protective device for an evaporator tube in an evaporator includes an evaporator tube disposed inside the evaporator. An insulating substrate is attached to and sealed to the surface of the evaporator tube. A base is fixed to the middle of the upper end face of the insulating substrate. A conductive electrode for penetrating and extending into the evaporator tube is fixed to the middle of the base. A fixing box is installed on the base. A sacrificial anode metal block is inserted into the fixing box. The sacrificial anode metal block elastically abuts against the end of the conductive electrode away from the insulating substrate.

[0007] Optionally, the insulating substrate is an arc-shaped patch structure adapted to the evaporator tube, and the insulating substrate and the evaporator tube are sealed together, with the sealing method including welding seal and mechanical seal.

[0008] Optionally, a fixing lug is fixed to the bottom edge of the base, and a bolt is provided on the fixing lug and threaded through the fixing lug to connect with the upper end face of the base, thereby forming a detachable fixing for the fixing box.

[0009] Optionally, a movable plate is elastically installed at the top of the fixed box, and the sacrificial anode metal block is inserted into the bottom of the movable plate and elastically abuts against the end of the conductive electrode away from the insulating substrate under the pushing of the movable plate.

[0010] Optionally, the top of the fixed box is provided with multiple springs, and the lower ends of the multiple springs are connected to a movable plate.

[0011] Optionally, the upper ends of the plurality of springs are all fixed to the top wall inside the fixing box.

[0012] Optionally, a top plate is provided at the top of the fixed box, and a pressure sensor is connected to the middle of the upper surface of the top plate. The pressure sensor is fixed to the top wall of the fixed box, and the upper ends of the plurality of springs are all fixed to the lower surface of the top plate.

[0013] Compared with the prior art, this utility model has at least the following beneficial effects:

[0014] In the above solution, by setting an arc-shaped insulating substrate adapted to the surface of the evaporator tube and installing a sacrificial anode metal block on the base, the electrochemical principle of the sacrificial anode can be used to effectively prevent corrosion of the inner wall of the evaporator tube, greatly extend the service life of the evaporator tube, ensure the stable operation of the evaporator, and reduce equipment failure and maintenance costs caused by damage to the evaporator tube.

[0015] Meanwhile, thanks to the fact that the fixed box is detachably fixed to the base with bolts, when the sacrificial anode metal block is worn out and needs to be replaced, the fixed box can be easily removed and replaced with a new sacrificial anode metal block. The operation is simple and convenient, which greatly improves the efficiency of equipment maintenance and reduces maintenance time and labor costs.

[0016] In addition, thanks to the pressure sensor installed inside the fixed box, the consumption of the sacrificial anode metal block can be monitored in real time, and staff can be reminded to replace it in a timely manner, which further improves the safety and reliability of the equipment.

[0017] In summary, this device, which uses sacrificial anode blocks to protect the evaporator tubes from corrosion, is easy to install and remove, simple to operate, and can be used with pressure sensors to monitor the consumption of sacrificial anode blocks in real time, which is beneficial for later maintenance. Overall, it has good performance. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0019] Figure 1 This is a schematic diagram of the evaporator and evaporator tubes.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model applied to an evaporator tube;

[0021] Figure 3 This is a schematic diagram of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the fixing box of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the fixed box in another embodiment of the present invention.

[0024] [Figure Labels]

[0025] 1. Evaporator; 2. Evaporator tube; 3. Insulating substrate; 4. Base; 401. Conductive electrode; 5. Fixing box; 501. Fixing lug; 502. Bolt; 6. Spring; 7. Movable plate; 8. Sacrificial anode metal block; 9. Top plate; 10. Pressure sensor.

[0026] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0027] The present invention provides a protective device for the evaporator tube on an evaporator, which is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can also use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0028] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0029] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0030] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0031] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0032] like Figure 1-4 As shown, an embodiment of this utility model provides a protective device for the evaporator tube on an evaporator, including an evaporator tube 2 inside the evaporator 1. An arc-shaped insulating substrate 3 is tightly attached and fixed to the outer wall of the evaporator tube 2. The insulating substrate 3 can be, but is not limited to, an alumina ceramic substrate, and its curvature matches the outer diameter of the evaporator tube 2. At the same time, leakage is prevented between the insulating substrate 3 and the evaporator tube 2 by welding or a flexible graphite packing mechanical seal.

[0033] A stainless steel base 4 is welded to the middle of the upper surface of the insulating substrate 3. A conductive electrode 401 is vertically installed through the center of the base 4. The conductive electrode 401 can be made of 316L stainless steel, and its lower end extends into the inner cavity of the evaporator tube 2. The electrode penetration is filled with high-temperature sealant.

[0034] The aluminum alloy fixing box 5 is detachably fixed to the top of the base 4 by bolts 502: Specifically, two fixing ears 501 are symmetrically fixed on both sides of the bottom of the aluminum alloy fixing box 5. Through holes are opened on the fixing ears 501, and bolts 502 are screwed into the threaded holes on the top of the base 4 through the through holes to press and fix the fixing box 5.

[0035] The fixed box 5 has multiple springs 6 installed at its top. The lower ends of these springs 6 are connected to a movable plate 7, and the upper ends of the springs 6 are fixed to the top wall of the fixed box 5, allowing the movable plate 7 to be elastically mounted on the top of the box. The bottom of the movable plate 7 has a slot for inserting a sacrificial anode metal block 8 (made of AZ31B magnesium alloy) to form a constant pressure contact with the top of the conductive electrode 401. Therefore, when replacement is needed, simply loosen the bolt 502 to remove the fixed box 5, and the sacrificial anode metal block 8 along with the movable plate 7 can be pulled out as a whole. After replacing the new component, tighten the bolt 502 again. The entire process requires no contact with the base 4 or the sealing structure.

[0036] In other embodiments, such as Figure 5 As shown, the difference from the above embodiment is that:

[0037] A pressure sensor 10 can also be welded to the top of the fixed box 5, and a horizontal top plate 9 is connected below it. The upper ends of three sets of springs 6 (model 65Mn stainless steel compression springs) are fixed to the bottom surface of the top plate 9, and the lower ends are connected to the movable plate 7.

[0038] The sacrificial anode metal block 8 is inserted into the slot at the bottom of the movable plate 7. Under the continuous pushing force of the spring 6, the bottom of the sacrificial anode metal block 8 forms a constant pressure contact with the top of the conductive electrode 401 (contact pressure ≥ 5N). When the sacrificial anode metal block 8 shortens due to electrochemical reaction, the spring 6 automatically extends to push the movable plate 7 downward, maintaining the electrical connection without interruption. At the same time, the pressure sensor 10 monitors the spring deformation in real time. When the detected pressure value is lower than the set threshold (e.g., 3N), the control system issues a replacement alarm.

[0039] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A protective device for evaporation tubes on an evaporator, comprising evaporation tubes (2) disposed within an evaporator (1), characterized in that, An insulating substrate (3) is attached to and sealed on the surface of the evaporator tube (2). A base (4) is fixed in the middle of the upper end face of the insulating substrate (3). A conductive electrode (401) for penetrating and extending into the evaporator tube (2) is fixed in the middle of the base (4). A fixing box (5) is installed on the base (4). A sacrificial anode metal block (8) is inserted into the fixing box (5). The sacrificial anode metal block (8) is elastically abutted against the end of the conductive electrode (401) away from the insulating substrate (3).

2. The protective device for the evaporator tubes on an evaporator according to claim 1, characterized in that, The insulating substrate (3) is an arc-shaped patch structure adapted to the evaporator tube (2), and the insulating substrate (3) and the evaporator tube (2) are sealed together. The sealing methods include welding sealing and mechanical sealing.

3. The protective device for the evaporator tubes on an evaporator according to claim 1, characterized in that, The base (4) has a fixing lug (501) fixed at its bottom edge. A bolt (502) is provided on the fixing lug (501) and passes through the fixing lug (501) to be threaded into the upper end face of the base (4) to form a detachable fixing for the fixing box (5).

4. The protective device for the evaporator tubes on an evaporator according to claim 1, characterized in that, A movable plate (7) is elastically installed on the top of the fixed box (5), and the sacrificial anode metal block (8) is inserted and installed at the bottom of the movable plate (7), and elastically abuts against the end of the conductive electrode (401) away from the insulating substrate (3) under the pushing of the movable plate (7).

5. The protective device for the evaporator tubes on an evaporator according to claim 4, characterized in that, The top of the fixed box (5) is provided with multiple springs (6), and the lower ends of the multiple springs (6) are connected to a movable plate (7).

6. The protective device for the evaporator tubes on an evaporator according to claim 5, characterized in that, The upper ends of the multiple springs (6) are all fixed to the inner top wall of the fixed box (5).

7. The protective device for the evaporator tubes on an evaporator according to claim 5, characterized in that, The top of the fixed box (5) is provided with a top plate (9), and a pressure sensor (10) is connected to the middle of the upper end face of the top plate (9). The pressure sensor (10) is fixed to the top wall inside the fixed box (5), and the upper ends of the multiple springs (6) are all fixed to the lower end face of the top plate (9).

Images