Waterproof and dustproof pressure transmitter junction box

Abstract

The utility model discloses a waterproof dustproof pressure transmitter junction box relates to pressure transmitter technical field, this waterproof dustproof pressure transmitter junction box, including junction box body, still include: set up in the wire inlet pipe of junction box body surface one side, the wire inlet pipe inner wall one side fixed setting has the locating piece. The utility model discloses through the setting of the plug -in sealing ring and the water -swelling sealing ring, will two groups of plug -in sealing ring insert into the plug -in slot of junction box body, and the box cover is connected with junction box body by screwing the connecting screw pipe, and the plug -in sealing ring and the plug -in slot form the contact surface of circuitous concave -convex, increase the path difficulty and resistance of water vapor and dust invasion, when the plug -in sealing ring, the connecting screw pipe cause slight abrasion because of repeatedly dismounting, the moisture can enter, the water -swelling sealing ring absorbs the water vapor and expands, carries out secondary sealing to the wall -hugging pipe and junction box body connecting place, forms a positive defense barrier, and the double -sealed mechanism makes waterproof dustproof more reliable.

Description

Technical Field

[0001] This utility model relates to the field of pressure transmitter technology, specifically a waterproof and dustproof pressure transmitter junction box. Background Technology

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electrical signals for control and remote transmission. The junction box of a pressure transmitter is the core component that electrically connects it to external control rooms, PLCs, DCS systems, etc. It is responsible for supplying power to the transmitter and transmitting the analog (or digital) signal representing the pressure value.

[0003] The utility model patent with announcement number CN208075895U discloses a new type of junction box for liquid level and pressure transmitters. The junction box has a sealing ring that provides good sealing against external moisture. The wire clamping plate and wire clamping bolts can effectively hold the wire in place to prevent it from falling off. The wire tightening sleeve and wire inlet can prevent moisture from seeping into the box from the wire inlet.

[0004] However, the junction box for this new type of liquid level and pressure transmitter is not easy to form a multi-layer sealing structure. Repeated insertion and removal of the top cover and positioning block may cause wear, and external moisture can easily enter the junction box through the wear part, causing moisture. Utility Model Content

[0005] The purpose of this utility model is to provide a waterproof and dustproof pressure transmitter junction box to solve the problems mentioned in the background art, such as the inconvenience of forming a multi-layer sealing structure, the potential wear caused by repeated insertion and removal of the top cover and positioning block, and the easy entry of external moisture into the junction box through the wear parts, causing dampness.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waterproof and dustproof pressure transmitter junction box, comprising a junction box body, and further comprising: an inlet pipe disposed on one side of the surface of the junction box body, a positioning plate fixedly disposed on one side of the inner wall of the inlet pipe, a silicone sheet fixedly disposed on one side of the positioning plate, a rubber sheet assembly fixedly disposed on one side of the silicone sheet, and a clamping stud threaded to one end of the inlet pipe; a color-changing silica gel desiccant disposed at the bottom of the inner wall of the junction box body, a connecting assembly threadedly connected to one side of the junction box body, and a water-swellable sealing ring fitted onto the surface of the connecting assembly; and a box cover disposed on the other side of the connecting assembly, with two sets of plug-in sealing rings fixedly disposed on one edge of the box cover.

[0007] As a preferred embodiment of this utility model, the rubber sheet assembly includes a rubber outer ring and a sealing rubber ring. The rubber outer ring is fixedly disposed on one side of the silicone sheet, and the sealing rubber ring consists of three sets, which are sequentially fixedly disposed on the inner wall of the rubber outer ring. The three sets of sealing rubber rings increase the sealing performance of the sealing rubber ring.

[0008] As a preferred embodiment of this utility model, the connecting assembly includes a connecting screw tube and a wall-mounted tube. The connecting screw tube is threaded to one side of the junction box body, and the wall-mounted tube is fixedly disposed at one end of the connecting screw tube. The connecting assembly is used to connect the box cover and the junction box body.

[0009] As a preferred technical solution of this utility model, the base material of the water-swellable sealing ring is butyl rubber, and the butyl rubber is internally compounded with superabsorbent resin. The water-swellable sealing ring can provide a secondary seal at the connection between the wall-mounted pipe and the junction box.

[0010] As a preferred technical solution of this utility model, the positioning piece, silicone sheet, rubber sheet group and clamping stud are all provided with wire-passing holes inside, and a hollow knob is fixedly provided at one end of the clamping stud, and the wire-passing hole facilitates the passage of the wire.

[0011] As a preferred technical solution of this utility model, the inner wall of the junction box is provided with two sets of plug-in slots, and the plug-in sealing ring is inserted into the inside of the plug-in slot, forming an outer layer seal with the plug-in slot.

[0012] As a preferred technical solution of this utility model, a fixing frame is embedded on the side of the junction box away from the box cover, and an observation window for observing the color-changing silica gel desiccant is fixedly provided inside the fixing frame. The observation window facilitates the observation of the color-changing silica gel desiccant's color change.

[0013] Compared with the prior art, this utility model provides a waterproof and dustproof pressure transmitter junction box, which has the following advantages: 1. This waterproof and dustproof pressure transmitter junction box, through the setting of plug-in sealing rings and water-swellable sealing rings, inserts two sets of plug-in sealing rings into the plug-in slots of the junction box body. By turning the connecting screw, the box cover is connected to the junction box body. The plug-in sealing rings and plug-in slots form a meandering contact surface, increasing the difficulty and resistance of water vapor and dust intrusion. When the plug-in sealing rings and connecting screws are slightly worn due to repeated disassembly and assembly, and moisture may enter, the water-swellable sealing ring absorbs the moisture and expands, providing a secondary seal at the connection between the wall-mounted pipe and the junction box body, forming an active defense barrier. The double sealing mechanism makes waterproof and dustproof protection more reliable.

[0014] 2. This waterproof and dustproof pressure transmitter junction box, through the arrangement of rubber sheet assembly, silicone sheet and clamping stud, allows the wire to be inserted through the wire hole, and the clamping stud is tightened to press it in place. The three sealing rubber rings of the rubber sheet assembly form three sealing lines with the wire. After being compressed, the silicone sheet, due to its good flexibility, will fill the gap between the wire and the inlet pipe to seal it, achieving a good tight-fitting seal effect. It can also be adapted to wires of different thicknesses. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model; Figure 3 This is a schematic diagram of the box lid structure of this utility model; Figure 4 This is a schematic diagram of the clamping stud structure of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the inlet pipe of this utility model; Figure 6 This is a schematic diagram of the observation window structure of this utility model.

[0016] In the diagram: 1. Junction box body; 2. Inlet pipe; 3. Positioning plate; 4. Silicone sheet; 5. Rubber sheet assembly; 501. Rubber outer ring; 502. Sealing rubber ring; 6. Compression stud; 7. Color-changing silica gel desiccant; 8. Connecting assembly; 801. Connecting screw tube; 802. Wall-mounted tube; 9. Water-swellable sealing ring; 10. Box cover; 11. Insert sealing ring; 12. Hollowed-out knob; 13. Observation window. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-6 This utility model discloses a waterproof and dustproof pressure transmitter junction box, including a junction box body 1, and further including: an inlet pipe 2 disposed on one side of the surface of the junction box body 1, a positioning piece 3 fixedly disposed on one side of the inner wall of the inlet pipe 2, a silicone sheet 4 fixedly disposed on one side of the positioning piece 3, a rubber sheet assembly 5 fixedly disposed on one side of the silicone sheet 4, and a clamping stud 6 threadedly connected to one end of the inlet pipe 2; by setting up the rubber sheet assembly 5, the silicone sheet 4 and the clamping stud 6, after the wire is inserted through the wire hole, the clamping stud 6 is tightened to press it in place. The three sealing rubber rings 502 of the rubber sheet assembly 5 form three sealing lines with the wire. After being compressed, the silicone sheet 4, due to its good flexibility, will fill the gap between the wire and the inlet pipe 2 to seal it, achieving a good effect of tight sealing, and can also be adapted to wires of different thicknesses; A color-changing silica gel desiccant 7 is placed at the bottom of the inner wall of the junction box 1. A connecting component 8 is threaded onto one side of the junction box 1, and a water-swellable sealing ring 9 is fitted onto the surface of the connecting component 8. A box cover 10 is placed on the other side of the connecting component 8, and two sets of plug-in sealing rings 11 are fixedly set on one edge of the box cover 10. By setting the plug-in sealing rings 11 and the water-swellable sealing rings 9, the two sets of plug-in sealing rings 11 are inserted into the plug-in groove of the junction box 1. The box cover 10 is connected to the junction box 1 by turning the connecting screw tube 801. The plug-in sealing rings 11 and the plug-in groove form a meandering contact surface, which increases the difficulty and resistance of water vapor and dust intrusion. When the plug-in sealing rings 11 and the connecting screw tube 801 are slightly worn due to repeated disassembly and assembly, and moisture may enter, the water-swellable sealing ring 9 absorbs the moisture and expands, and performs a secondary seal at the connection between the wall-mounted tube 802 and the junction box 1, forming an active defense barrier. The double sealing mechanism makes waterproofing and dustproofing more reliable.

[0019] Specifically, the rubber sheet assembly 5 includes a rubber outer ring 501 and a sealing rubber ring 502. The rubber outer ring 501 is fixedly disposed on one side of the silicone sheet 4, and the sealing rubber ring 502 consists of three sets, which are sequentially fixedly disposed on the inner wall of the rubber outer ring 501.

[0020] In this embodiment, the three sealing rubber rings 502 inside the outer rubber ring 501 form three sealing lines with the circuit, resulting in a better sealing effect and making it difficult for dust and moisture to enter.

[0021] Specifically, the connecting component 8 includes a connecting screw tube 801 and a wall-mounted tube 802. The connecting screw tube 801 is threaded to one side of the junction box 1, and the wall-mounted tube 802 is fixedly installed at one end of the connecting screw tube 801.

[0022] In this embodiment, the wall-mounted tube 802 is inserted into the junction box 1, and the connecting screw tube 801 is turned to connect the junction box 1 and the cover 10.

[0023] Specifically, the base material of the water-swellable sealing ring 9 is butyl rubber, and the butyl rubber is internally composited with superabsorbent resin.

[0024] In this embodiment, the water-swellable sealing ring 9 absorbs and expands water vapor, and performs a secondary seal at the connection between the wall-mounted pipe 802 and the junction box 1, forming an active defense barrier.

[0025] Specifically, the positioning piece 3, silicone sheet 4, rubber sheet group 5 and clamping stud 6 are all provided with wire holes, and a hollow knob 12 is fixedly provided at one end of the clamping stud 6.

[0026] In this embodiment, the wire hole facilitates the passage of the wire, and the hollow knob 12 is used to rotate the clamping stud 6.

[0027] Specifically, the inner wall of the junction box 1 is provided with two sets of plug slots, and the plug sealing ring 11 is inserted into the inside of the plug slot.

[0028] In this embodiment, the insertion groove facilitates the insertion of the sealing ring 11.

[0029] Specifically, a fixing frame is embedded on the side of the junction box 1 away from the cover 10, and an observation window 13 for observing the color-changing silica gel desiccant 7 is fixedly installed inside the fixing frame.

[0030] In this implementation plan, the observation window 13 facilitates personnel to observe the color change of the color-changing silica gel desiccant 7.

[0031] The working principle and usage process of this utility model: Open the box cover 10 and connect the line to the junction box 1 through the inlet pipe 2; After the wiring is completed, tighten the clamping stud 6 to press it in place. The three sealing rubber rings 502 of the rubber sheet group 5 form three sealing lines with the line. After being pressed, the silicone sheet 4 will fill the gap between the line and the inlet pipe 2 due to its good flexibility, and the tight-fitting seal is effective and can be adapted to lines of different thicknesses. Insert two sets of plug-in sealing rings 11 into the plug-in slots of the junction box body 1, and turn the connecting screw tube 801 to connect the box cover 10 to the junction box body 1. The plug-in sealing rings 11 and the plug-in slots form a meandering contact surface, which increases the difficulty and resistance of the path for water vapor and dust to enter. When the plug-in sealing ring 11 and connecting screw tube 801 are slightly worn due to repeated disassembly and assembly, dust will still be intercepted and isolated. When moisture may enter, the water-expanding sealing ring 9 will absorb the moisture and expand, thus sealing the connection between the wall-mounted tube 802 and the junction box 1 a second time, forming an active defense barrier. The double sealing mechanism makes waterproofing and dustproofing more reliable. The color-changing silica gel desiccant 7 can absorb the moisture in the junction box 1. Personnel can observe the color change of the desiccant through the observation window 13, which is convenient for timely replacement.

[0032] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] 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. A waterproof and dustproof pressure transmitter junction box, comprising a junction box body (1), characterized in that, Also includes: An inlet pipe (2) is provided on one side of the surface of the junction box (1). A positioning piece (3) is fixedly provided on one side of the inner wall of the inlet pipe (2). A silicone sheet (4) is fixedly provided on one side of the positioning piece (3). A rubber sheet group (5) is fixedly provided on one side of the silicone sheet (4). A clamping stud (6) is threaded to one end of the inlet pipe (2). A color-changing silica gel desiccant (7) is placed at the bottom of the inner wall of the junction box (1). A connecting component (8) is threaded to one side of the junction box (1). A water-swellable sealing ring (9) is fitted onto the surface of the connecting component (8). A cover (10) is provided on the other side of the connecting component (8), and two sets of plug-in sealing rings (11) are fixedly provided on one side edge of the cover (10).

2. The waterproof and dustproof pressure transmitter junction box according to claim 1, characterized in that: The rubber sheet assembly (5) includes a rubber outer ring (501) and a sealing rubber ring (502). The rubber outer ring (501) is fixedly disposed on one side of the silicone sheet (4), and the sealing rubber ring (502) consists of three sets and is fixedly disposed on the inner wall of the rubber outer ring (501) in sequence.

3. The waterproof and dustproof pressure transmitter junction box according to claim 1, characterized in that: The connecting assembly (8) includes a connecting screw tube (801) and a wall-mounted tube (802). The connecting screw tube (801) is threaded to one side of the junction box body (1), and the wall-mounted tube (802) is fixedly disposed at one end of the connecting screw tube (801).

4. The waterproof and dustproof pressure transmitter junction box according to claim 1, characterized in that: The substrate of the water-swellable sealing ring (9) is butyl rubber.

5. A waterproof and dustproof pressure transmitter junction box according to claim 1, characterized in that: The positioning piece (3), silicone sheet (4), rubber sheet group (5) and clamping stud (6) are all provided with threading holes, and a hollow knob (12) is fixedly provided at one end of the clamping stud (6).

6. The waterproof and dustproof pressure transmitter junction box according to claim 1, characterized in that: The inner wall of the junction box (1) is provided with two sets of plug slots, and the plug sealing ring (11) is inserted into the inside of the plug slot.

7. A waterproof and dustproof pressure transmitter junction box according to claim 1, characterized in that: A fixed frame is embedded on the side of the junction box (1) away from the cover (10), and an observation window (13) for observing the color-changing silica gel desiccant (7) is fixedly installed inside the fixed frame.

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