Explosion-proof magnetostrictive linear displacement sensor

Abstract

The utility model discloses an explosion -proof magnetostrictive linear displacement sensor, including electronic warehouse, one side of electronic warehouse is connected with surveying staff, and the surveying staff is the pole piece of cylindrical structure, the both sides of electronic warehouse are provided with front cover and back cover respectively, the integral setting of back cover has explosion -proof golan, and the explosion -proof golan is used for data cable to wear out, the utility model relates to displacement sensor technical field, and this magnetostrictive linear displacement sensor thickens electronic warehouse wall and enhances the anti -explosion intensity obviously, the core explosion -proof barrier of taper limit slot and boss is formed by interference fit and forms the core explosion -proof barrier and blocks flame propagation, and the rubber ring is realized secondary sealing in closed groove pressure, and explosion -proof golan ensures cable outlet safety, and the integral type heat shrink sleeve provides the additional protection and sealing of connecting part, and the multiple structure effectively closes the internal electric arc spark and pressure, and resists external explosion impact, and the safety problem of magnetostrictive sensor in explosive environment application is solved.

Description

Technical Field

[0001] This utility model relates to the field of displacement sensor technology, specifically an explosion-proof magnetostrictive linear displacement sensor. Background Technology

[0002] Currently, many large pieces of equipment in the construction machinery industry require linear position measurement. Built-in magnetostrictive linear displacement sensors with pressure-resistant shells are a perfect combination of high precision and high reliability. At the same time, the detection range can be from 25 to 7600 mm, so they are widely used in various environments, such as hydropower stations, steel plants and metallurgical equipment, hydraulic power equipment, civil and construction machinery, etc.

[0003] In addition to linear displacement, it is also used in environments containing explosive gases or dust. Therefore, explosion-proof is an indispensable capability for sensors used in such environments. Currently, the electronic housing and measuring rod of sensors on the market are usually installed together with bolts. The wall thickness of the electronic housing is usually between 1-2mm. The outlet of the electronic housing is mostly in the form of an aviation plug. When the sensor is in use, there will be large voltage and current input and output, which can become the source of fire in an explosive environment. Traditional design and installation methods cannot effectively isolate the internal and external environments of the electronic housing, so they are not suitable for such environments. Since the wall thickness of the sensor's electronic housing is usually between 1-2mm, it is relatively thin and cannot withstand the pressure impact of an explosion. Therefore, in such environments, the sensor is also easily affected by the explosion and thus damaged. In view of this, in-depth research was conducted on the above problems, which led to this case. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, this utility model provides a name and solves the existing background technology problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an explosion-proof magnetostrictive linear displacement sensor, including an electronic compartment, a measuring rod connected to one side of the electronic compartment, the measuring rod being a cylindrical rod, a front cover and a rear cover respectively provided on both sides of the electronic compartment, an explosion-proof goblin integrally provided on the rear cover, the explosion-proof goblin being used for data cable to pass through; The end of the front cover is provided with a fixing seat, and the fixing seat is integrally connected to the measuring rod; The electronic compartment is a cylindrical shell with a cylindrical cavity at its center. A pair of limiting grooves are provided at both ends of the electronic compartment. The limiting grooves are partially conical grooves. The front cover and the rear cover are provided with partially conical bosses that match the limiting grooves. The front cover and the rear cover are provided with several connecting holes. The electronic compartment has a pair of closed grooves at both ends outside a pair of limiting grooves. Several positioning holes are provided around the pair of closed grooves. A sealing rubber ring is installed on the closed groove. A screw is installed in the connecting hole, passing through the sealing rubber ring and connecting to the connecting hole.

[0006] Preferably, the taper of the boss is the same as the taper of the limiting groove, and the boss and the limiting groove are interference fit.

[0007] Preferably, the sealing ring is a ring-shaped rubber ring, and the front cover or the rear cover is pressed onto the sealing ring.

[0008] Preferably, the diameter of the enclosing groove is larger than the diameter of the limiting groove.

[0009] Preferably, the wall thickness of the electronic compartment is between 3 and 5 mm.

[0010] Preferably, a heat shrink sleeve is integrally provided on the front cover and the rear cover, and the heat shrink sleeve is a cylindrical structure that wraps around the connection position between the front cover and the rear cover and the electronic compartment.

[0011] This invention provides an explosion-proof magnetostrictive linear displacement sensor. It offers the following advantages: the sensor significantly thickens the electronic compartment wall to enhance explosion resistance; the interference-fit conical limiting groove and boss form a core explosion-proof barrier to block flame propagation; the sealed groove is press-fitted with a rubber ring for secondary sealing; the explosion-proof goblet ensures cable outlet safety; and the integrated heat-shrink sleeve provides additional protection and sealing for the connection points. This multi-layered structure effectively seals off internal electric arcs and pressure, resisting external explosive impacts and solving the safety challenges of using magnetostrictive sensors in explosive environments. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the explosion-proof magnetostrictive linear displacement sensor described in this utility model.

[0013] Figure 2 This is a schematic diagram of the explosion-proof magnetostrictive linear displacement sensor of this utility model.

[0014] Figure 3 This is a side view of the explosion-proof magnetostrictive linear displacement sensor of this utility model.

[0015] In the diagram: 1. Electronic compartment; 2. Measuring rod; 3. Front cover; 4. Rear cover; 5. Explosion-proof gob; 6. Fixing base; 7. Limiting groove; 8. Boss; 9. Connecting hole; 10. Sealing groove; 11. Sealing rubber ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 This utility model provides an implementation scheme: The source of fire in current magnetostrictive linear displacement sensors is mainly that the traditional design and installation methods cannot effectively isolate the inside and outside environment of the electronic compartment 1, so they are not suitable for such environments. Since the wall thickness of the electronic compartment 1 of the sensor is usually between 1-2mm, it is relatively thin and cannot withstand the pressure impact of an explosion. Therefore, in such environments, the sensor can also be easily affected by the explosion and thus be damaged.

[0018] To address the aforementioned issues, this application discloses an explosion-proof magnetostrictive linear displacement sensor, comprising an electronic compartment 1, which houses the electronic structure of the magnetostrictive sensor. A measuring rod 2 is connected to one side of the electronic compartment 1. The measuring rod 2 is a cylindrical rod that allows the magnetic ring to slide. A front cover 3 and a rear cover 4 are respectively provided on both sides of the electronic compartment 1. An explosion-proof goblet 5 is integrally provided on the rear cover 4, which is used for the data cable to pass through. Furthermore, according to the instruction manual appendix Figure 1-3 It can be seen that the front cover 3 is provided with a fixing seat 6 at the end, and the fixing seat 6 is integrally connected with the measuring rod 2. The electronic compartment 1 is a cylindrical shell structure. The center of the electronic compartment 1 is a cylindrical cavity. The wall thickness of the electronic compartment 1 is significantly increased to between 3-5mm to enhance the explosion pressure resistance. A pair of limiting grooves 7 are provided at both ends of the electronic compartment 1. The limiting grooves 7 are grooves with a partially conical structure. The front cover 3 and the rear cover 4 are provided with protrusions 8 with a partially conical structure. The protrusions 8 match the limiting grooves 7. The taper of the protrusions 8 is the same as the taper of the limiting grooves 7. The protrusions 8 and the limiting grooves 7 are interference fit to form a core explosion-proof barrier to prevent the internal flame from spreading along the gap and to withstand high pressure. The front cover 3 and the rear cover 4 are provided with several connecting holes 9. The electronic compartment 1 has a pair of sealing grooves 10 located outside a pair of limiting grooves 7 at both ends. Several positioning holes are provided on the pair of sealing grooves 10. Sealing rubber rings 11 are installed on the sealing grooves 10. The sealing rubber rings 11 are annular rubber rings. Screws are installed in the connecting holes 9, which pass through the sealing rubber rings 11 and connect to the connecting holes 9. The front cover 3 or the rear cover 4 is pressed on the sealing rubber rings 11 to achieve secondary sealing.

[0019] Heat shrink sleeves are integrally provided on the front cover 3 and the rear cover 4. The heat shrink sleeves are cylindrical structures that wrap around the connection between the front cover 3 and the rear cover 4 and the electronic compartment 1, providing additional environmental sealing and protection for the connection parts.

[0020] As a preferred option, the taper of the boss 8 is the same as that of the limiting groove 7, and the boss 8 and the limiting groove 7 are interference fit. Through the tapered structure design, the contact area between the front cover 3 and the rear cover 4 and the electronic compartment 1 is increased, thereby further improving the sealing effect.

[0021] As a preferred option, the sealing ring 11 is a ring-shaped rubber ring, and the front cover 3 or the rear cover 4 is pressed onto the sealing ring 11.

[0022] As a preferred option, the diameter of the sealing groove 10 is larger than the diameter of the limiting groove 7, and the diameter of the sealing ring 11 matches that of the sealing groove 10, thereby achieving complete sealing of the electronic compartment 1.

[0023] As a preferred option, the wall thickness of the electronic compartment 1 is between 3-5mm, which effectively improves the ability of the electronic compartment 1 to withstand explosions.

[0024] As a preferred option, the front cover 3 and the rear cover 4 are integrally provided with heat shrink sleeves. The heat shrink sleeves are cylindrical structures that wrap around the connection between the front cover 3 and the rear cover 4 and the electronic compartment 1. The heat shrink sleeves can further cover the connection between the front cover 3 and the rear cover 4 and the electronic compartment 1, thereby enhancing the sealing performance.

[0025] Workflow Summary: The sensor operates in an explosive environment. The magnetic ring inside the measuring rod 2 moves with the moving parts. The circuit of the electronic chamber 1 generates an interrogation pulse and detects the return strain pulse to calculate the position. The high voltage and current inside are tightly sealed. In case of internal failure, the thickened wall of the electronic chamber 1, the interference fit conical limiting surface, and the tight sealing rubber ring 11 together form multiple robust barriers to limit and cool the explosion flame and pressure inside the chamber, preventing leakage and ignition of the environment. At the same time, it resists external explosion impact, and the heat shrink sleeve protects the connection parts.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof magnetostrictive linear displacement sensor, comprising an electronic chamber (1), wherein a measuring rod (2) is connected to one side of the electronic chamber (1), and the measuring rod (2) is a cylindrical rod, characterized in that, The electronic compartment (1) is provided with a front cover (3) and a rear cover (4) on both sides respectively. An explosion-proof goblet (5) is integrally provided on the rear cover (4). The explosion-proof goblet is used for data cables to pass through. The front cover (3) is provided with a fixing seat (6) at its end, and the fixing seat (6) is integrally connected with the measuring rod (2); The electronic compartment (1) is a cylindrical shell with a cylindrical cavity at its center. A pair of limiting grooves (7) are provided at both ends of the electronic compartment (1). The limiting grooves (7) are partially conical grooves. The front cover (3) and the rear cover (4) are provided with partially conical bosses (8). The bosses (8) match the limiting grooves (7). The front cover (3) and the rear cover (4) are provided with several connecting holes (9). The electronic compartment (1) has a pair of closed grooves (10) located outside a pair of limiting grooves (7) at both ends. A number of positioning holes are provided around the pair of closed grooves (10). A sealing rubber ring (11) is installed on the closed groove (10). A screw is installed in the connecting hole (9) and passes through the sealing rubber ring (11) to connect with the connecting hole (9).

2. The explosion-proof magnetostrictive linear displacement sensor according to claim 1, characterized in that, The taper of the boss (8) is the same as that of the limiting groove (7), and the boss (8) and the limiting groove (7) are interference fit.

3. The explosion-proof magnetostrictive linear displacement sensor according to claim 2, characterized in that, The sealing rubber ring (11) is a ring-shaped rubber ring, and the front cover (3) or the rear cover (4) is pressed onto the sealing rubber ring (11).

4. The explosion-proof magnetostrictive linear displacement sensor according to claim 3, characterized in that, The diameter of the closed groove (10) is greater than the diameter of the limiting groove (7).

5. The explosion-proof magnetostrictive linear displacement sensor according to claim 4, characterized in that, The wall thickness of the electronic compartment (1) is between 3 and 5 mm.

6. The explosion-proof magnetostrictive linear displacement sensor according to claim 5, characterized in that, Heat shrink sleeves are integrally provided on the front cover (3) and the rear cover (4). The heat shrink sleeves are cylindrical structures that wrap around the connection between the front cover (3) and the rear cover (4) and the electronic compartment (1).

Images