Endoscope protective shell for corrosion detection of heat exchanger tube bundle

Abstract

The utility model relates to an endoscope protective shell for corrosion detection of a heat exchanger tube bundle, which is a hollow pipeline with two open ends, one end of the endoscope protective shell is a connecting end, and the other end of the endoscope protective shell is a drainage end integrally formed with the connecting end; the connecting end is in a straight cylinder shape, a through hole is formed in the top of the side wall of the connecting end, and a fastener is arranged in the through hole in a matched mode. A water inlet groove is formed in the end side annular face of the drainage end, the drainage end is divided into an inner layer and an outer layer through the water inlet groove, and the outer layer of the drainage end is in a horn-shaped cylinder design. The front side face and the rear side face of the outer layer of the drainage end are each provided with a row of overflow holes. The lens of the endoscope plays a role of a protective shell, and the lens is prevented from being damaged or abraded by scaling impact; and through the design of the water inlet groove and the overflow hole at the drainage end, the lens is prevented from being polluted and damaged by liquid, the detection precision of the lens is improved, the service life of the endoscope is prolonged, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger tube bundle corrosion detection, in particular to an endoscope protective shell for heat exchanger tube bundle corrosion detection. Background Art

[0002] Endoscopes are used for inspecting heat exchanger tube bundles in refineries such as PetroChina and Sinopec.

[0003] Normally, when inspecting the heat exchanger in a refinery, the heat exchanger under test needs to be flushed. However, there will still be residual water marks and oil stains in the tube during the inspection process. At the same time, the inner wall of the heat exchanger tube bundle with a long service life will produce scaling due to chemical reactions. When we use an endoscope to inspect the corrosion of the inner wall of the tube bundle, oil stains will contaminate the mirror surface, and scaling will wear the lens, resulting in waste of materials, increased costs, and reduced detection clarity, resulting in reduced detection accuracy and reduced detection efficiency.

[0004] In order to protect and prevent oil and water stains from contaminating the mirror surface, an endoscope protective shell for heat exchanger tube bundle corrosion detection is designed to solve the above problems. Summary of the invention

[0005] In order to overcome the above shortcomings, the utility model provides an endoscope protection shell for heat exchanger tube bundle corrosion detection, which is a hollow pipe type with both ends open, one end of the endoscope protection shell is a connection end, and the other end is a drainage end integrally formed with the connection end;

[0006] The connecting end is in the shape of a straight cylinder, and a through hole is provided on the top of the side wall of the connecting end, and a fastener is provided in the through hole; a water inlet groove is provided on the annular surface of the end side of the drainage end, and the water inlet groove divides the drainage end into an inner layer and an outer layer, and the outer layer of the drainage end is designed as a trumpet-shaped cylinder; the diameter of the side where the outer layer of the drainage end is connected to the connecting end gradually increases to the side where the outer layer of the drainage end is free of the end; the opening of the water inlet groove is on one side of the opening of the free end of the drainage end, and the diameter of the side where the outer layer of the drainage end is connected to the connecting end is the same as the diameter of the connecting end; a row of overflow holes is provided on the front side and the rear side of the outer layer of the drainage end;

[0007] The lens end of the endoscope is inserted from the end where the connection end is located and penetrates into one side of the drainage end; the lens end of the endoscope is flush with the inner end surface of the drainage end.

[0008] Preferably, the length of the inner layer of the drainage end is shorter than the length of the outer layer of the drainage end.

[0009] Preferably, three overflow holes are arranged in a row.

[0010] Preferably, the fastener is a top screw.

[0011] The beneficial effects of the utility model are:

[0012] The endoscope protective shell for detecting corrosion of the heat exchanger tube bundle described in the utility model serves as a protective shell for the lens of the endoscope. The outer layer design of the extended drainage end 3 prevents the lens from being damaged or worn by scaling impact; the water inlet trough and overflow hole design of the drainage end separate the residual liquid in the tube bundle in advance to prevent liquid from contaminating and damaging the lens, thereby improving the detection accuracy of the lens; the overall use facilitates detection, improves the detection accuracy, extends the service life of the endoscope, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A three-dimensional image of an endoscope protective shell for corrosion inspection of heat exchanger tube bundles;

[0014] Figure 2 This is the front view of the endoscope protective shell used for corrosion detection of heat exchanger tube bundles;

[0015] Figure 3 for Figure 2 AA cross-section diagram;

[0016] Figure 4 A top view of the endoscope protective shell used for corrosion detection of heat exchanger tube bundles;

[0017] Figure 5 for Figure 4 BB cross-section diagram;

[0018] Figure 6 This is a diagram showing the usage status of the endoscope protective shell used for corrosion detection of heat exchanger tube bundles;

[0019] Figure 7 A schematic diagram of the separation of an endoscope protective shell and an endoscope for detecting corrosion of a heat exchanger tube bundle;

[0020] in:

[0021] 1-connection end; 2-fastener; 3-drainage end; 4-water inlet; 5-overflow hole; 6-endoscope. DETAILED DESCRIPTION

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, the endoscope protection shell for heat exchanger tube bundle corrosion detection is a hollow pipe type with both ends open, one end of the endoscope protection shell is a connection end 1, and the other end is a drainage end 3 integrally formed with the connection end 1;

[0023] like Figure 3 , Figure 4 and Figure 5As shown, the connecting end 1 is in a straight cylindrical shape, and a through hole for fastening is provided at the top of the side wall of the connecting end 1, and the through hole is equipped with a fastener 2;

[0024] like Figure 3 and Figure 5 As shown, a water inlet groove 4 is provided on the annular surface on the end side of the drainage end 3, and the water inlet groove 4 divides the drainage end 3 into an inner layer and an outer layer, and the outer layer of the drainage end 3 is designed as a trumpet-shaped cylinder; the diameter of the side from the outer layer of the drainage end 3 connected to the connecting end 1 to the side of the free end of the outer layer of the drainage end 3 gradually increases; the water inlet groove 4 is opened on one side of the opening of the free end of the drainage end 3, and the diameter of the side from the outer layer of the drainage end 3 connected to the connecting end 1 is the same as the diameter of the connecting end 1; a row of overflow holes 5 are respectively provided on the front side and the rear side of the outer layer of the drainage end 3; residual liquids such as water marks and oil stains enter the water inlet groove 4 from the opening of the water inlet groove 4, and then overflow from the overflow holes 5 to prevent the liquid from contaminating the lens surface of the endoscope 6;

[0025] The lens end of the endoscope 6 is inserted from the end where the connection end 1 is located, and penetrates into one side of the drainage end 3, playing the role of adding a layer of protective shell; the lens end of the endoscope 6 is flush with the inner end surface of the drainage end 3, and the endoscope 6 and the endoscope protective shell are fastened and connected by inserting the fastener 2 into the through hole;

[0026] like Figure 3 As shown, the length of the inner layer of the drainage end 3 is shorter than the length of the outer layer of the drainage end 3 , and the outer layer of the drainage end 3 can better protect the lens of the endoscope 6 and prevent the lens from being worn.

[0027] like Figure 3 As shown, three overflow holes 5 are arranged in a row.

[0028] The fastener 2 is a top screw.

[0029] Directions:

[0030] The lens end of the endoscope 6 is inserted from the end where the connection end 1 is located, and penetrates into one side of the drainage end 3, playing the role of adding a layer of protective shell; the lens end of the endoscope 6 is flush with the inner end surface of the drainage end 3, and the endoscope 6 and the endoscope protective shell are fastened and connected by inserting the fastener 2 into the through hole;

[0031] When the heat exchanger tube bundle is used for corrosion detection, the water or oil liquid remaining in the heat exchanger tube bundle will first enter the water inlet tank 4 from the opening of the water inlet tank 4, and then overflow from the overflow hole 5, avoiding direct contact with the lens of the endoscope 6, thereby causing corrosion or contamination of the lens;

[0032] The outer layer of the extended drainage end 3 can first contact with impurities such as scaling, which can better protect the lens of the endoscope 6 and prevent the lens from being worn by impurities such as scaling.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. Endoscope protective shell for heat exchanger tube bundle corrosion detection, characterized in that: It is a hollow pipe type with two ends open, one end of the endoscope protective shell is a connection end (1), and the other end is a drainage end (3) integrally formed with the connection end (1); The connecting end (1) is in the shape of a straight cylinder, and a through hole is provided at the top of the side wall of the connecting end (1), and the through hole is matched with a fastener (2); a water inlet groove (4) is provided on the end side annular surface of the drainage end (3), and the water inlet groove (4) divides the drainage end (3) into an inner layer and an outer layer, and the outer layer of the drainage end (3) is designed as a trumpet-shaped cylinder; the diameter of the side where the outer layer of the drainage end (3) is connected to the connecting end (1) gradually increases to the side where the outer layer of the drainage end (3) is free of the drainage end (3); the opening of the water inlet groove (4) is on the side where the free end of the drainage end (3) is opened, and the diameter of the side where the outer layer of the drainage end (3) is connected to the connecting end (1) is the same as the diameter of the connecting end (1); a row of overflow holes (5) are respectively provided on the front side and the rear side of the outer layer of the drainage end (3); The lens end of the endoscope (6) is inserted from the end where the connection end (1) is located and penetrates into one side of the drainage end (3); the lens end of the endoscope (6) is flush with the inner end surface of the drainage end (3); The length of the inner layer of the drainage end (3) is shorter than the length of the outer layer of the drainage end (3).

2. The endoscope protective shell for detecting corrosion of heat exchanger tube bundle according to claim 1, characterized in that: Three overflow holes (5) are arranged in a row.

3. The endoscope protective shell for detecting corrosion of heat exchanger tube bundle according to claim 2, characterized in that: The fastener (2) is a top screw.

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