Sensor mounting structure

Abstract

The utility model relates to the field of additive manufacturing, and discloses a sensor mounting structure, which comprises a sensor body, a mounting hole penetrating through the side wall of a container or an air chamber and a mounting base fixedly penetrating through the mounting hole, and the mounting base is hermetically connected with the mounting hole; an installation blind hole is formed in the outer end face of the installation base, the sensing end of the sensor body is inserted into the installation blind hole, the sensor body is detachably connected with the installation base, and according to the sensor installation structure, the sensor body detachably connected to the installation base can detect material changes in a container or an air chamber through the installation blind hole. And under the blocking effect of the mounting base, the air tightness of the sensor body after mounting can be ensured, and the sensor body can be quickly disassembled and assembled. And meanwhile, the mounting base can isolate and reduce high-temperature influence, mechanical wear and electrostatic influence of high-speed powder and equipment on the sensor body, so that the service life of the sensor body is prolonged, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of additive manufacturing, in particular to a sensor installation structure. Background Art

[0002] In the metal 3D printing industry, in many working conditions, it is necessary to judge the remaining volume of metal powder in a container or air chamber through a proximity switch, or simply judge whether there is metal powder. At present, the commonly used installation method in the industry is to directly insert the sensing end of the proximity switch into the inner cavity of the container or air chamber from the outside, so that it can contact the metal powder inside the container or air chamber, and then judge the material capacity or presence / absence by adjusting the sensitivity of the proximity switch. However, there are the following problems:

[0003] 1. In the 3D printing industry, it is usually necessary to ensure the airtightness of the working environment. Therefore, the installation of the proximity switch must be fixed with sealant. When the proximity switch fails, it is difficult to remove.

[0004] 2. Metal powder will generate heat during pneumatic conveying, and overheating will cause the proximity switch to fail.

[0005] 3. During pneumatic conveying of metal powder, the high-speed moving metal powder is prone to cause mechanical failure of the proximity switch through impact and friction.

[0006] 4. A large amount of static electricity will be generated during the storage and transportation of metal powder, and the static electricity will cause the proximity switch to fail.

[0007] The above problems will cause the service life of the proximity switch to be greatly reduced, so there is still room for improvement. Content of the Utility Model

[0008] Aiming at the shortcomings of the prior art, the utility model provides a sensor installation structure, which can effectively extend the service life of the sensor body.

[0009] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0010] A sensor installation structure includes a sensor body, and further includes an installation hole penetrating through the side wall of a container or air chamber and an installation base fixedly inserted into the installation hole. The installation base is hermetically connected to the installation hole; a mounting blind hole is formed on the outer end face of the installation base, the sensing end of the sensor body is inserted into the mounting blind hole, and the sensor body is detachably connected to the installation base.

[0011] With the above - mentioned solution, the sensor body that can be detachably connected to the mounting base can detect the material change in the container or air chamber through the mounting blind hole. Under the blocking effect of the mounting base, it can not only ensure the airtightness after the installation of the sensor body, but also realize the quick disassembly and assembly of the sensor body. At the same time, the mounting base can isolate and reduce the high - temperature influence, mechanical wear and electrostatic influence caused by high - speed powder and equipment on the sensor body, thereby prolonging the service life of the sensor body and reducing the production cost.

[0012] Preferably, the opening of the sensor body and the mounting blind hole are connected by a flange.

[0013] Preferably, a first flange is annularly provided on the outer side of the mounting base and near the opening of the mounting blind hole, a second flange is annularly provided on the outer side of the sensor body and is docked with the first flange, and the first flange and the second flange are fixed by screws.

[0014] With the above - mentioned solution, the flange connection structure is simple, convenient for disassembly and assembly, and can ensure the stability after the docking of the sensor body and the mounting blind hole, thereby improving the detection accuracy of the sensor body.

[0015] Preferably, the second flange is threadedly connected to the outer side of the sensor body.

[0016] With the above - mentioned solution, the threaded connection and cooperation between the second flange and the sensor body can not only realize the connection between the second flange and the sensor body, but also change the depth of the sensor body entering the mounting blind hole, thereby adjusting the sensitivity of the sensor body.

[0017] Preferably, a fastening nut is threadedly connected to the outer side of the sensor body and presses against the end face of the second flange away from the first flange to limit the circumferential rotation of the second flange.

[0018] With the above - mentioned solution, the cooperation between the fastening nut and the second flange can realize a "double - nut" structure, thereby completing the circumferential locking of the second flange and preventing the sensor body from loosening.

[0019] Preferably, an internal - thread bushing is fixedly inserted into the mounting hole, the outer side wall of the internal - thread bushing is hermetically connected to the inner side of the mounting hole, and the mounting base is threadedly connected to the internal - thread bushing.

[0020] With the above - mentioned solution, the threaded connection and cooperation between the mounting base and the internal - thread bushing can not only realize the stable installation of the mounting base, but also ensure the airtightness after installation. The hermetic connection between the internal - thread bushing and the mounting hole can further improve the airtightness of the sensor installation structure, thereby ensuring the airtightness of the working environment.

[0021] Preferably, a sealing glue is filled between the internal - thread bushing and the mounting base.

[0022] With the above solution, the sealant filled between the internal thread bushing and the mounting base can further improve the sealing performance between the two.

[0023] Preferably, the mounting base is made of a polymer material that is non-conductive and non-heat-conductive.

[0024] With the above solution, the mounting base has better high-temperature resistance, impact resistance and anti-static ability, and will not affect the normal operation of the sensor body.

[0025] Since the present utility model adopts the above technical solutions, it has remarkable technical effects: the sensor body detachably connected to the mounting base can detect the material change in the container or air chamber through the mounting blind hole. Under the blocking effect of the mounting base, the airtightness after the installation of the sensor body can be ensured, and the quick disassembly and assembly of the sensor body can be realized. At the same time, the mounting base can isolate and reduce the high-temperature influence, mechanical wear and static electricity influence caused by high-speed powder and equipment on the sensor body, thereby prolonging the service life of the sensor body and reducing the production cost. Description of the Drawings

[0026] Figure 1 is a structural schematic diagram of this embodiment;

[0027] Figure 2 is an exploded view of this embodiment;

[0028] Figure 3 is a cross-sectional view of this embodiment;

[0029] Figure 4 is Figure 3 an enlarged schematic view of part A shown.

[0030] The names of the parts referred to by the above numerical labels in the drawings are as follows: 1, sensor body; 2, side wall; 3, mounting hole; 4, mounting base; 5, mounting blind hole; 6, sensing end; 7, first flange; 8, second flange; 9, screw; 10, fastening nut; 11, internal thread bushing; 12, internal thread; 13, first external thread; 14, second external thread. Detailed Embodiment

[0031] The present utility model will be further described in detail below in conjunction with the drawings and embodiments.

[0032] As Figures 1 to 4 shown, a sensor mounting structure disclosed in this embodiment includes a cylindrical sensor body 1, and the sensor body 1 can be an inductive sensor or a capacitive sensor, such as a proximity switch.

[0033] In order to improve the convenience of disassembly and assembly of the sensor body 1, the sensor mounting structure also includes a mounting hole 3 that penetrates the side wall 2 of the container or air chamber and a mounting base 4 that is fixedly penetrated in the mounting hole 3. The mounting base 4 is cylindrical and is axially inserted in the mounting hole 3. The mounting base 4 is sealed and connected to the mounting hole 3, thereby ensuring the sealing of the sensor mounting structure. A mounting blind hole 5 is provided on the outer end surface of the mounting base 4. The sensing end 6 of the sensor body 1 is inserted into the mounting blind hole 5. The sensor body 1 is detachably connected to the mounting base 4. The mounting base 4 is made of a non-conductive and non-heat-conductive polymer material, including but not limited to POM, glass fiber or bakelite. In this way, the high temperature resistance, impact resistance and anti-static ability of the mounting base 4 can be guaranteed without affecting the normal operation of the sensor body 1.

[0034] In order to ensure the convenience of disassembly and assembly between the sensor body 1 and the mounting base 4 and the stability after installation, the sensor body 1 is connected to the opening of the mounting blind hole 5 through a flange. Specifically, a first flange 7 is fixedly provided on the outer side of the mounting base 4 near the opening of the mounting blind hole 5, and a second flange 8 is provided on the outer side of the sensor body 1 to dock with the first flange 7. The first flange 7 and the second flange 8 are fixed by three screws 9.

[0035] In order to facilitate the adjustment of the sensitivity of the sensor body 1, the inner circle of the second flange 8 is provided with an internal thread 12, and the outer peripheral surface of the sensor body 1 is provided with a first external thread 13 for matching the internal thread 12, so that the second flange 8 can be screwed on the outer side of the sensor body 1. When the sensor body 1 rotates circumferentially on the second flange 8, it can change the distance into the mounting blind hole 5, thereby realizing the adjustment of the sensitivity.

[0036] In order to improve the connection stability between the sensor body 1 and the second flange 8 , the outer thread of the sensor body 1 is screwed with a fastening nut 10 that presses against the end surface of the second flange 8 away from the first flange 7 to limit the circumferential rotation of the second flange 8 .

[0037] In order to achieve a stable connection between the mounting base 4 and the side wall 2 of the container or air chamber and ensure the sealing, an internal thread bushing 11 is fixedly inserted into the mounting hole 3, and the outer side wall 2 of the internal thread bushing 11 is sealed and connected to the inner side of the mounting hole 3 by welding. The outer peripheral surface of the mounting base 4 is distributed with a second external thread 14, so that it can be screwed to the internal thread bushing 11. The space between the internal thread bushing 11 and the mounting base 4 is filled with sealant to further improve the sealing of the sensor mounting structure, thereby ensuring the airtightness of the equipment working environment.

[0038] The specific usage process is as follows:

[0039] When installing the sensor body 1, first screw the installation base 4 onto the internal thread bushing 11, and fill sealant between the two. Then, screw the second flange 8 onto the outside of the sensor body 1, and insert the sensing end 6 of the sensor body 1 into the installation blind hole 5 of the installation base 4, while completing the docking of the second flange 8 and the first flange 7. After the docking is completed, fix the second flange 8 and the first flange 7 with screws 9. At this time, by rotating the sensor body 1, the distance that the sensor body 1 enters the installation blind hole 5 can be changed, so as to adjust the sensitivity of the sensor body 1. After the adjustment is completed, screw the fastening nut 10 onto the outside of the sensor body 1 and press the second flange 8, so as to complete the circumferential locking of the second flange 8. If the sensor installation structure is accompanied by strong vibration, fastening glue can be added between the fastening nut 10 and the second flange 8 to prevent the fastening nut 10 from loosening and further improve the stability of the sensor installation structure.

[0040] When disassembling the sensor body 1, just perform the above installation steps in reverse.

[0041] In this way, the sensor body 1 detachably connected to the installation base 4 can detect the material change in the container or the air chamber through the installation blind hole 5. Under the blocking effect of the installation base 4, both the airtightness after the installation of the sensor body 1 can be ensured, and the quick disassembly and assembly of the sensor body 1 can be realized. At the same time, the installation base 4 can isolate and reduce the high temperature influence, mechanical wear and static electricity influence caused by high-speed powder and equipment on the sensor body 1, so as to extend the service life of the sensor body 1 and reduce the production cost.

Claims

1. A sensor mounting structure, comprising a sensor body (1), characterized in that: The sensor body (1) further comprises a mounting hole (3) penetrating the side wall (2) of the container or the air chamber and a mounting base (4) fixedly arranged in the mounting hole (3), wherein the mounting base (4) is sealedly connected to the mounting hole (3); a mounting blind hole (5) is formed on the outer end surface of the mounting base (4), and the sensing end (6) of the sensor body (1) is inserted into the mounting blind hole (5), and the sensor body (1) and the mounting base (4) are detachably connected.

2. A sensor mounting structure according to claim 1, characterized in that: The sensor body (1) is connected to the opening of the mounting blind hole (5) via a flange.

3. A sensor mounting structure according to claim 2, characterized in that: A first flange (7) is provided on the outer side of the mounting base (4) and near the opening of the mounting blind hole (5); a second flange (8) is provided on the outer side of the sensor body (1) and is connected to the first flange (7); the first flange (7) and the second flange (8) are fixed by screws (9).

4. A sensor mounting structure according to claim 3, characterized in that: The second flange (8) is screwed onto the outer side of the sensor body (1).

5. A sensor installation structure according to claim 4, characterized in that: The outer thread of the sensor body (1) is screwed with a fastening nut (10) which is pressed against the end surface of the second flange (8) away from the first flange (7) to limit the circumferential rotation of the second flange (8).

6. A sensor mounting structure according to any one of claims 1 to 5, characterized in that: An internal thread bushing (11) is fixedly inserted into the mounting hole (3), an outer wall (2) of the internal thread bushing (11) is sealed and connected to the inner side of the mounting hole (3), and a mounting base (4) is threadedly screwed to the internal thread bushing (11).

7. A sensor mounting structure according to claim 6, characterized in that: Sealant is filled between the internal thread bushing (11) and the mounting base (4).

8. A sensor mounting structure according to any one of claims 1 to 5, characterized in that: The mounting base (4) is made of a high polymer material that is neither electrically conductive nor thermally conductive.

Images