Explosion-proof box for flow transmitter

Abstract

The utility model belongs to the technical field of explosion-proof instruments, and particularly relates to an explosion-proof box for a flow transmitter, which comprises a box body and a panel, and is characterized in that the box body is a square box body, the panel is a round panel, the panel is connected with a round opening in the upper surface of the box body through explosion-proof threads, a window hole is formed in the panel, and the window hole is communicated with the box body. A sealing ring is arranged at the matched connection position of the panel and the box body, a fixing plate is arranged in the box body, the four corners of the fixing plate are connected with the bottom of the box body through long studs, the position of the fixing plate on the long studs is adjusted through an upper nut and a lower nut of the fixing plate, and the fixing plate is provided with an installation hole used for installing a display screen assembly. Toughened glass at the top of the display screen assembly is embedded into a window seat on the back surface of the window hole; and a gap between the toughened glass and the window seat is filled with colloid. The explosion-proof box has the advantages that the height of the fixing plate where the flow display screen assembly is located can be adjusted, it is guaranteed that the explosion-proof box is universally used under the condition of different flow meter specifications, and the requirement for the explosion-proof grade of the product is met.

Description

Technical Field

[0001] This utility model belongs to the field of explosion-proof instrument technology, and in particular relates to an explosion-proof box for a flow transmitter. Background Technology

[0002] Explosion-proof refers to the ability to withstand the impact and heat of an explosion without loss and to continue functioning normally. Preventing an explosion requires considering three essential conditions: ignition point, oxidizing gas, and combustible material. Limiting any one of these conditions limits the occurrence of an explosion. Instruments and electrical equipment are required to have corresponding explosion-proof structures. Explosion-proof instruments are electric instruments that can be safely used in environments containing explosive mixtures. These instruments are designed and manufactured with specific safety measures in place to ensure safe power supply, use, detection, and control in hazardous locations such as petroleum and chemical plants.

[0003] A flow transmitter, also known as a flow sensor or simply a flow meter, is a new generation of high-precision, high-reliability precision metering instrument developed according to ISO 9951 standards and incorporating advanced domestic and international flow meter technologies. It integrates temperature, pressure, and flow sensors with an intelligent flow totalizer. Flow transmitters are often used in conjunction with flow sensors to measure flow rate and are frequently used in applications requiring explosion-proof features; therefore, their enclosures must have a high explosion-proof rating.

[0004] Chinese utility model patent application number 202220191299.3 discloses an ultrasonic flow meter, including a mounting base and an explosion-proof box. The mounting base has a mounting groove on its top, within which a bearing is fixedly connected. A support column is fixedly inserted into the bearing, and the top of the support column is fixedly connected to the explosion-proof box. The flow meter body is located inside the explosion-proof box. Positioning plates are provided on both sides of the explosion-proof box. Two connecting rods are fixedly connected to one side of each positioning plate. One end of each connecting rod passes through the explosion-proof box and extends inward. A pressing block is fixedly connected to the extended end of the connecting rod, and the pressing block abuts against the flow meter body. The positioning plate has a threaded opening with a threaded rod inserted into its thread. This ultrasonic flow meter is easy to install, allows for flexible adjustment of the flow meter's display direction, prevents the flow meter from being obstructed by other objects, and makes reading more convenient. However, the explosion-proof box is of a fixed size and cannot be used with other sizes of flow meters, which is not conducive to reducing manufacturing costs and simplifying production management. Utility Model Content

[0005] The purpose of this utility model is to provide an explosion-proof enclosure for flow transmitters, overcoming the shortcomings of the prior art. The enclosure structure is applicable to various specifications of flow transmitters. The fixed plate where the flow display screen assembly is located is height adjustable, which facilitates the fit between the panel and the glass window of the display screen assembly, avoids the leakage of combustible gas, and ensures the explosion-proof requirements of the product.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An explosion-proof enclosure for a flow transmitter includes a housing and a panel. The housing is square, and the panel is circular. The panel is connected to a circular opening on the upper surface of the housing via an explosion-proof thread. A viewing window is provided on the panel. A sealing ring is provided at the connection between the panel and the housing. A fixing plate is provided inside the housing. The four corners of the fixing plate are connected to the bottom of the housing via long studs. The position of the fixing plate on the long studs is adjusted by two nuts on the upper and lower parts of the fixing plate. The fixing plate has mounting holes for installing a display screen assembly. The tempered glass on the top of the display screen assembly is embedded in a viewing window seat on the back of the viewing window. The gap between the tempered glass and the viewing window seat is filled with adhesive.

[0008] Furthermore, the bonding surface length of the colloid is greater than 10 mm, and the colloid is K-9741 adhesive.

[0009] Furthermore, the viewing window is circular, with a 30-45° chamfer on the outer edge.

[0010] Furthermore, the lower surface of the housing is provided with feet, and mounting holes are opened on the feet. The mounting holes are elongated holes.

[0011] Furthermore, the panel is provided with two symmetrical handles on the left and right sides; the panel is also provided with a product nameplate.

[0012] Furthermore, the side of the enclosure is provided with several explosion-proof glands, which are connected to the enclosure via explosion-proof threads.

[0013] Furthermore, the explosion-proof thread has a minimum number of engagement threads greater than 5 and an axial engagement length greater than 8 mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) This enclosure structure is suitable for various specifications of flow transmitters. By making the height of the fixed plate where the flow display assembly is located adjustable, the explosion-proof enclosure can be used for different flow meter specifications.

[0016] 2) It can ensure that the panel is always in close contact with the glass window of the display assembly, thereby avoiding the leakage of combustible gases and helping to meet the explosion-proof requirements of the product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 yes Figure 1 Sectional view along line AA;

[0019] Figure 3 This is a schematic diagram of the structure of this utility model in use;

[0020] Figure 4 yes Figure 1 Sectional view along line BB;

[0021] Figure 5 yes Figure 2 Enlarged view of a section at point I;

[0022] In the diagram: 1-box body, 2-panel, 3-explosion-proof thread, 4-viewing window, 5-sealing ring, 6-fixing plate, 7-long stud, 8-nut, 9-display assembly, 10-tempered glass, 11-viewing window base, 12-colloidal material, 13-foot, 14-handle, 15-product nameplate, 16-explosion-proof gland, 17-screw, 18-grounding connector. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0025] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0026] See Figure 1-5This is a schematic diagram of an embodiment of an explosion-proof box for a flow transmitter according to this utility model. It includes a box body 1 and a panel 2. The box body 1 is square, and the panel 2 is circular. The panel 2 is connected to the circular opening on the upper surface of the box body 1 via explosion-proof threads 3. A viewing window 4 is provided on the panel 2. A sealing ring 5 is provided at the connection point between the panel 2 and the box body 1. A fixing plate 6 is provided inside the box body 1. The four corners of the fixing plate 6 are connected to the bottom of the box body 1 via long studs 7. The position of the fixing plate 6 on the long studs 7 is adjusted by two nuts 8 on the upper and lower parts of the fixing plate 6. The fixing plate 6 has mounting holes for installing a display screen assembly 9. The tempered glass 10 on the top of the display screen assembly 9 is embedded in a viewing window seat 11 on the back of the viewing window 4 and fixed by a connector. The gap between the tempered glass 10 and the viewing window seat 11 is filled with an adhesive 12. The bonding surface length of the adhesive 12 is greater than 10mm. The adhesive 12 is K-9741 adhesive, which also prevents the leakage of flammable gases.

[0027] The viewing window 4 is circular, with a 30-45° chamfer on the outer edge, which can provide a wider viewing angle.

[0028] The lower surface of the housing 1 is provided with a foot 13, and the foot 13 has a mounting hole. The mounting hole is an elongated hole. The foot 13 is cut from sheet metal profile and is connected to the housing 1 by screws 17.

[0029] Two handles 14 are symmetrically arranged on the left and right sides of the panel 2 for easy transfer and movement; a product nameplate 15 is provided on the panel 2.

[0030] The side of the enclosure 1 is provided with a number of explosion-proof glands 16. The explosion-proof glands 16 are connected to the enclosure 1 through explosion-proof threads 3. The explosion-proof glands 16 are used for cable connection to meet electrical functions.

[0031] The minimum number of engagement threads for explosion-proof thread 3 is greater than 5, and the axial engagement length is greater than 8mm. These parameters meet the requirements of the explosion-proof rating of explosion-proof instruments.

[0032] 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 enclosure for a flow transmitter, comprising an enclosure body and a panel, characterized in that, The enclosure is square, and the panel is round. The panel is connected to the round opening on the upper surface of the enclosure via an explosion-proof thread. The panel has a viewing window. A sealing ring is provided at the connection between the panel and the enclosure. A fixing plate is provided inside the enclosure. The four corners of the fixing plate are connected to the bottom of the enclosure via long studs. The position of the fixing plate on the long studs is adjusted by two nuts on the upper and lower parts of the fixing plate. The fixing plate has mounting holes for installing the display screen assembly. The tempered glass on the top of the display screen assembly is embedded in the viewing window seat on the back of the viewing window. The gap between the tempered glass and the viewing window seat is filled with adhesive.

2. The explosion-proof enclosure for a flow transmitter according to claim 1, characterized in that, The bonding surface length of the colloid is greater than 10 mm, and the colloid is K-9741 adhesive.

3. The explosion-proof enclosure for a flow transmitter according to claim 1, characterized in that, The viewing window is circular, with a 30-45° chamfer on the outer edge.

4. The explosion-proof enclosure for a flow transmitter according to claim 1, characterized in that, The lower surface of the box is provided with feet, and mounting holes are opened on the feet. The mounting holes are elongated holes.

5. The explosion-proof enclosure for a flow transmitter according to claim 1, characterized in that, The panel has two symmetrical handles on the left and right sides; the panel also has a product nameplate.

6. The explosion-proof enclosure for a flow transmitter according to claim 1, characterized in that, The side of the enclosure is provided with a dozen explosion-proof glands, which are connected to the enclosure via explosion-proof threads.

7. The explosion-proof enclosure for a flow transmitter according to claim 6, characterized in that, The explosion-proof thread has a minimum number of engagement threads greater than 5 and an axial engagement length greater than 8 mm.

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