Fixing device for acoustic emission detection sensor of high-purity ammonia tank

Abstract

The utility model relates to the field of special equipment detection, aims to overcome the defects in the background technology, and provides a fixing device for an acoustic emission detection sensor of a high-purity ammonia tank box, which has the characteristics of simple structure and convenience in operation, and can meet the detection requirement of a high-purity ammonia tank with a thermal insulation layer. According to the technical scheme, the fixing device for the acoustic emission detection sensor of the high-purity ammonia tank box is characterized by comprising a main support, auxiliary supports arranged at the two ends of the main support and fixed to a heat preservation layer, and a chuck used for installing the sensor and connected with the main support through an adjusting assembly.

Description

Technical Field

[0001] The utility model relates to the field of special equipment inspection, in particular to a fixing device for an acoustic emission detection sensor of a high-purity ammonia tank container. Background Technique

[0002] Acoustic emission detection is a common non-destructive testing method. Different from traditional non-destructive testing methods, acoustic emission detection belongs to a dynamic testing method, and the acoustic emission signal comes from active defects inside the material without the need for external excitation. Acoustic emission detection is widely used in many fields such as petrochemical industry, aerospace, and material testing. Since acoustic emission detection can achieve inspection without opening the tank, greatly shortening the inspection cycle, it has been widely used in the high-purity chemical industry, such as the inspection of high-purity ammonia and high-purity hydrogen fluoride tank containers.

[0003] The elastic wave emitted by the acoustic emission source is converted into an electrical signal by the sensor and then amplified, processed, and recorded. Good coupling between the sensor and the measured tank container is the primary condition for the smooth progress of the detection work. Therefore, the fixation of the sensor is particularly important in acoustic emission detection. Commonly used fixation methods at normal temperature usually include magnetic base fixation, glue fixation, and tape fixation, etc. By these methods, appropriate pressure is applied to the sensor to make the sensor fully coupled with the inspected component or material.

[0004] However, the high-purity ammonia austenitic tank container is equipped with a thermal insulation layer, and austenite has no ferromagnetism, so the method of magnetic base fixation cannot be used. It is found in the actual inspection process that when using glue fixation and tape fixation, the operation is complex and the coupling effect is not ideal, which may affect the accuracy of the inspection results. At the same time, due to the Kaiser effect, acoustic emission detection has non-reproducibility. Therefore, it is necessary to design a fixing device for an acoustic emission detection sensor that can adapt to the austenitic tank container with a thermal insulation layer to ensure the smooth progress of acoustic emission detection and the safe use of the tank container. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the above background technique and provide a fixing device for an acoustic emission detection sensor of a high-purity ammonia tank container. The device should have the characteristics of simple structure and convenient operation, and can meet the detection requirements of high-purity ammonia tanks with thermal insulation layers.

[0006] The technical solution of the utility model is as follows:

[0007] A fixing device for an acoustic emission detection sensor of a high-purity ammonia tank container, characterized in that: the device includes a main bracket, sub-brackets arranged at both ends of the main bracket for plugging and matching with the thermal insulation layer, and a chuck for installing the sensor and connecting to the main bracket through an adjustment component.

[0008] The sub-bracket includes an insertion plate and a strong magnet.

[0009] The adjusting assembly includes a jack formed on the main bracket, an adjusting rod passing through the jack, a nut engaged with the adjusting rod, and a spring sleeved on the adjusting rod.

[0010] The chuck is fixed to the inner end of the adjusting rod; the spring and the nut are respectively arranged on both sides of the main bracket, and both ends of the spring respectively abut against the chuck and the main bracket.

[0011] The insertion plate is provided with an adjusting groove for installing the main bracket.

[0012] The adjusting groove is arranged obliquely; both ends of the main bracket are clamped into the adjusting grooves on both sides.

[0013] The insertion plate is provided with a snap ring.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The structure of the present utility model is simple, easy to produce and maintain, with low manufacturing cost, simple operation, easy to master, greatly improving the inspection efficiency, capable of achieving good coupling between the emission sensor and the high-purity ammonia austenitic tank body, improving the accuracy of acoustic emission detection, meeting the inspection requirements of high-purity ammonia tank containers made of austenitic materials, and also meeting the inspection requirements of other austenitic tank containers with insulation layers. Description of the Drawings

[0016] Figure 1 is the front view structural schematic diagram of the present utility model.

[0017] Figure 2 is the three-dimensional structural schematic diagram of the auxiliary bracket of the present utility model.

[0018] Figure 3 is the front view structural schematic diagram of the main bracket and the adjusting assembly of the present utility model.

[0019] Figure 4 is the top view structural schematic diagram of the main bracket and the adjusting assembly of the present utility model.

[0020] Figure 5 is Figure 4 the sectional structural schematic diagram in the A-A direction of

[0021] Figure 6 is the bottom view structural schematic diagram of the chuck of the present utility model.

[0022] Figure 7 is one of the installation schematic diagrams of the present utility model.

[0023] Figure 8 is another installation schematic diagram of the present utility model.

[0024] Figure 9 is the third installation schematic diagram of the present utility model.

[0025] Figure 10 This is the fourth installation schematic diagram of the present utility model.

[0026] Reference numerals:

[0027] Main bracket 1, plane 1-1, auxiliary bracket 2, chuck 3, notch 3-1, jack 4, adjusting rod 5, nut 6, spring 7, snap ring 8, insertion plate 21, first insertion plate 21-1, second insertion plate 21-2, strong magnet 22, adjusting groove 23. Specific embodiments

[0028] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] As Figure 1 shown, the acoustic emission detection sensor fixing device for high-purity ammonia tank containers includes a main bracket 1, an auxiliary bracket 2, and a chuck 3.

[0030] The chuck is used to install the sensor. The chuck is connected to the main bracket through an adjusting assembly. The auxiliary brackets are arranged at both ends of the main bracket. The auxiliary brackets are fixed to the insulation layer of the tank container. This device ensures sufficient coupling between the sensor and the tank body by providing appropriate pressing force to the sensor.

[0031] The sensor (omitted in the figure) is inserted into the chuck. The side wall of the chuck is provided with a notch 3-1. The chuck clamps the sensor through the deformation of the notch. The wires configured for the sensor pass through the notch and are connected to an external controller (omitted in the figure).

[0032] As Figure 3 shown, the adjusting assembly includes a jack 4, an adjusting rod 5, and a nut 6. The adjusting rod is perpendicular to the surface of the tank body and axially passes through the jack. The adjusting rod can move axially along the jack to adjust the distance from the tank body. The jack is made in the middle of the main bracket. The chuck is fixed to the inner end of the adjusting rod (the end close to the tank container, Figure 3 the lower end), and the outer end of the adjusting rod (the end far from the tank container, Figure 3 the upper end) is provided with an external thread.

[0033] The nut is used to adjust the magnitude of the pressing force and facilitate the installation of the main bracket. The nut meshes with the external thread. The spring is sleeved on the adjusting rod. The spring and the nut are respectively arranged on both sides of the main bracket.

[0034] The spring is used to provide pressing force for the sensor. As Figure 3 shown, the nut is arranged above the main bracket, and the spring and the chuck are arranged below the main bracket. Both ends of the spring respectively abut against the chuck and the main bracket.

[0035] On both sides of the main bracket, there are parallelly arranged planes 1-1 ( Figure 3 the top and bottom surfaces of the main bracket in the middle), to facilitate the nut and the spring to hold against the main bracket.

[0036] The auxiliary bracket includes an insertion plate 21 and a strong magnet 22. The insertion plate is L-shaped and includes a first insertion plate 21-1 and a second insertion plate 21-2 arranged vertically. The first insertion plate is used to insert into the insulation layer (insert into the insulation layer along the direction parallel to the surface of the tank body), and the second insertion plate is used to connect to the main bracket (the second insertion plate is perpendicular to the surface of the tank body and extends out of the insulation layer).

[0037] The insertion plate is provided with an adjustment groove 23 for connecting to the main bracket. The adjustment groove is made on the second insertion plate. The adjustment groove is arranged obliquely, and the axis C of the length direction of the adjustment groove and the normal line B of the surface of the tank body maintain a certain included angle α, and α is 60 degrees to 80 degrees, preferably 70 degrees.

[0038] The adjustment groove is made on the edge of the second insertion plate, and the adjustment groove extends obliquely along the direction away from the surface of the tank body. Therefore, the opening of the adjustment groove is close to the tank body, and the bottom of the adjustment groove is far from the tank body. When installing the main bracket, put the main bracket into the adjustment groove, the adjustment groove clamps the main bracket, and apply pressure to the chuck through the spring and the adjusting rod, so that the sensor is fully coupled with the tank body. At least one adjustment groove is provided on each auxiliary bracket. Figure 2 It shows that two adjustment grooves are provided on each auxiliary bracket. A snap ring 8 is also provided on the second insertion plate of one of the auxiliary brackets.

[0039] The strong magnet is attracted to the first insertion plate to further fix the insertion plate and ensure the installation strength.

[0040] The working principle of the present utility model is as follows:

[0041] 1. As Figure 7 shown, during the actual acoustic emission detection process, drill holes in the insulation layer of the high-purity ammonia tank body according to the sensor layout scheme; the recommended hole size is 120mm×120mm;

[0042] 2. After drilling the holes, expose the metal layer on the surface of the tank body and clean the dirt on the metal surface;

[0043] 3. As Figure 8 shown, install two auxiliary brackets at the appropriate positions of the drilled holes, so that the first insertion plate is inserted into the section at the drilled hole position along the direction parallel to the surface of the tank body, and make the second insertion plate close to the section; the second insertion plate extends out of the drilled hole;

[0044] 4. Place the strong magnet at the corresponding position on the surface of the insulation layer, so that the strong magnet attracts the first insertion plate to ensure that the auxiliary bracket is firmly fixed on the insulation layer;

[0045] 5. Gently snap the sensor into the chuck and apply the coupling agent. Rotate the nut to compress the spring and move the chuck closer to the main bracket. As shown in Figure 9 , select the appropriate adjustment slot according to the thickness of the insulation layer and snap the two ends of the main bracket into the adjustment slot. At this time, the sensor does not touch the tank body.

[0046] 6. As shown in Figure 10 , rotate the nut in the reverse direction. The sensor gradually approaches the tank body. Ensure that the adjusting rod is perpendicular to the surface of the tank body to fully couple the sensor with the tank body, and snap the signal wire into the retaining ring.

[0047] 7. Start acoustic emission detection.

[0048] 8. After the acoustic emission detection is completed, rotate the nut in the reverse direction to disengage the sensor from the tank body. Remove the main bracket from the auxiliary bracket, remove the sensor, and then remove the auxiliary bracket.

[0049] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Claims

1. A high-purity ammonia tank acoustic emission detection sensor fixing device, characterized in that: The device comprises a main support (1), auxiliary supports (2) arranged at both ends of the main support to be plugged into and matched with the thermal insulation layer, and a clamp (3) for mounting a sensor and connected to the main support via an adjustment component; The auxiliary bracket comprises a plug plate (21) and a strong magnet (22); The adjustment assembly comprises a socket (4) formed on the main bracket, an adjustment rod (5) passing through the socket, a nut (6) meshing with the adjustment rod, and a spring (7) sleeved on the adjustment rod.

2. The high-purity ammonia tank acoustic emission detection sensor fixing device according to claim 1 is characterized in that: The clamp is fixed on the inner end of the adjusting rod; the spring and the nut are respectively arranged on both sides of the main bracket, and the two ends of the spring respectively support the clamp and the main bracket.

3. The high-purity ammonia tank acoustic emission detection sensor fixing device according to claim 2 is characterized in that: The plug plate is provided with an adjustment slot (23) for mounting the main bracket.

4. The high-purity ammonia tank acoustic emission detection sensor fixing device according to claim 3 is characterized in that: The adjusting slots are arranged obliquely; and the two ends of the main bracket are inserted into the adjusting slots on both sides.

5. The high-purity ammonia tank acoustic emission detection sensor fixing device according to claim 4 is characterized in that: A snap ring (8) is provided on the plug plate.

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