Temperature transmitter

Abstract

The temperature transmitter is characterized in that an opening of a junction box is provided with a lower flange extending outwards, a protective cover is provided with an upper flange in contact with the lower flange in a matched mode, the lower flange is provided with pressing ribs protruding upwards, the pressing ribs are annularly distributed and arranged around the surface of the lower flange, the upper flange is provided with an annular sealing ring in an embedded mode, and the upper flange is provided with a sealing ring in an embedded mode. The sealing ring is provided with a groove corresponding to the press-fit rib, and the press-fit rib is embedded in the groove and connected with the sealing ring in a sealed mode. When the transmitter needs to be installed, the protective cover is turned over to be mutually covered with the junction box, the pressing rib is embedded in the groove of the sealing ring, the protective cover is pressed downwards, the sealing ring is extruded by the pressing rib and then transversely deforms, a gap between the sealing ring and the pressing rib is sealed, and sealing connection of the pressing rib and the sealing ring is achieved. And finally, the lower flange and the upper flange are limited and fixed through a limiting mechanism, the springback condition is prevented, fastening connection is conducted through a locking mechanism, and therefore the sealing performance and protectiveness are improved.

Description

Technical Field

[0001] This utility model relates to the field of temperature transmitter technology, and in particular to a temperature transmitter. Background Technology

[0002] Temperature transmitters use thermocouples or resistance temperature detectors (RTDs) as temperature sensing elements, sending the temperature signal to the transmitter module, which then converts it into a standard electrical signal output. They are widely used in metallurgy, petroleum, chemical, power, light industry, and textile industries for measuring and controlling process temperature parameters. Temperature transmitters include a housing to protect the components and wiring; however, conventional housing structures are often too simple, resulting in insufficient sealing.

[0003] Patent No. ZL 202322396447.2 discloses a waterproof thermocouple temperature sensor. The junction box includes a box body with an opening on the top and a cover threaded onto the box body. The opening of the box body is angled and has a first sealing gasket around it. A temperature transmitter is housed inside the box, and a temperature sensing wire is electrically connected to the temperature transmitter. A sleeve and a stainless steel probe are welded to the lower end of the junction box. The stainless steel probe is located in the center of the sleeve, and the lower part of the temperature sensing wire is located inside the stainless steel probe. However, the solution mentioned in the above patent is a conventional temperature transmitter structure on the market. The outer shell is fastened by a threaded connection. Repeated rotation of the threads can easily cause them to rust and strip, and the exposed sealing gasket is prone to aging and deformation, thus affecting the sealing performance of the outer shell. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a temperature transmitter.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A temperature transmitter includes an upward-opening junction box, a protective cover hinged to the junction box, and a transmitter disposed within the junction box. The junction box opening has an outwardly extending lower flange, the protective cover has an upper flange that mates with the lower flange, the lower flange has upward-protruding pressing ribs distributed in a ring and surrounding the surface of the lower flange, the upper flange is fitted with an annular sealing ring, the sealing ring has grooves corresponding to the pressing ribs, the pressing ribs are embedded in the grooves and are sealed to the sealing ring, a limiting mechanism and a locking mechanism are provided between the lower flange and the upper flange, the locking mechanism is disposed opposite to the hinged side of the junction box, and the limiting mechanism is symmetrically disposed on both sides of the junction box.

[0007] Preferably, the cross-section of the compression rib is trapezoidal, with a rounded top transition, the groove is matched with the compression rib, and the sidewall is interference-fitted with the compression rib.

[0008] Preferably, the limiting mechanism includes retaining rings symmetrically disposed on the outer edge of the lower flange, and an insert plate that matches the retaining ring. The insert plate is disposed on the outer edge of the upper flange and is movably inserted into the retaining ring.

[0009] Preferably, the outer edge of the upper flange is provided with an ear for mounting a insert plate, the insert plate is movably connected to the ear, and is inserted downward into the retaining ring.

[0010] Preferably, the ear and the retaining ring are provided with openings on the same side for the insertion plate to enter and exit. The insertion plate is sway-connected to the ear and is inserted into the retaining ring through the opening.

[0011] Preferably, the insert plate has an L-shaped structure, with its end extending towards the retaining ring. One end of the insert plate is hinged to the ear, and the other end of the insert plate is engaged with the bottom of the retaining ring.

[0012] Preferably, the locking mechanism includes a threaded sleeve disposed on the outer edge of the upper flange and a screw disposed on the outer edge of the lower flange, and the bottom of the threaded sleeve is provided with a threaded cavity for screwing and fixing with the screw.

[0013] Preferably, the outer edge of the upper flange is provided with a tongue that slides with the threaded sleeve, and the outer edge of the lower flange is provided with a tongue that is threaded with the screw, with the tongue and the tongue in close contact.

[0014] Preferably, the tongue is provided with a stepped groove coaxial with the screw, the bottom of the screw sleeve is inserted into the stepped groove and threadedly connected to the screw.

[0015] Preferably, the bottom of the screw is provided with a dial that can be manually turned, the dial is fixedly connected to the screw and protrudes outward relative to the outer edge of the tongue.

[0016] This utility model has the following beneficial effects:

[0017] This invention utilizes a combination of compression ribs and a sealing ring. When installing a transmitter, the transmitter is placed inside a junction box and connected to the power supply, sensors, and other components. Then, the protective cover is flipped up to close the junction box, allowing the compression ribs to embed into the grooves of the sealing ring. Pressing the protective cover down causes the sealing ring to deform laterally under the pressure of the compression ribs, sealing the gap between the ribs and the sealing ring, thus achieving a sealed connection. Finally, a limiting mechanism limits and fixes the lower and upper flanges to prevent springback, and a locking mechanism secures the connection. This improves sealing and protection, preventing issues such as repeated thread rotation leading to rust and stripping, and the exposed sealing ring being prone to aging and deformation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the state of the temperature transmitter described in this utility model. Figure 1

[0019] Figure 2This is a schematic diagram of the state of the temperature transmitter described in this utility model. Figure 2

[0020] Figure 3 This is an assembly diagram of the junction box described in this utility model.

[0021] Figure 4 This is a schematic diagram of the assembly of the protective cover described in this utility model.

[0022] Figure descriptions: 1. Junction box; 2. Protective cover; 3. Transmitter; 4. Lower flange; 5. Upper flange; 6. Pressing rib; 7. Sealing ring; 8. Snap ring; 9. Insert plate; 10. Ear; 11. Screw sleeve; 12. Screw; 13. Sleeve tongue; 14. Rod tongue; 15. Step groove. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1 to 4 One embodiment provided by this utility model:

[0025] A temperature transmitter includes an upward-opening junction box 1, a protective cover 2 hinged to the junction box 1, and a transmitter 3 disposed within the junction box 1. The junction box 1 has an outwardly extending lower flange 4 at its opening; the protective cover 2 has an upper flange 5 that mates with the lower flange 4; the lower flange 4 has upward-protruding pressing ribs 6 arranged in a ring around the surface of the lower flange 4; the upper flange 5 is fitted with an annular sealing ring 7, which has a groove corresponding to the pressing ribs 6; the pressing ribs 6 are embedded in the groove and are sealed to the sealing ring 7; a limiting mechanism and a locking mechanism are provided between the lower flange 4 and the upper flange 5; the locking mechanism is positioned opposite to the hinged side of the junction box 1; and the limiting mechanism is symmetrically positioned on both sides of the junction box 1.

[0026] Junction box 1 and protective cover 2 are hinged flip-tops, each with a hemispherical shell structure. Their mating surfaces are angled downwards, facilitating wiring operations after opening protective cover 2. Transmitter 3 is installed inside junction box 1 and can be connected to power supplies, thermocouples, RTDs, etc., as needed. Junction box 1 and protective cover 2 each have cavities with openings facing each other. Junction box 1 opens upwards, and lower flange 4 extends outwards from its opening in a ring shape. Protective cover 2 opens downwards, and upper flange 5 extends outwards from its opening. Upper flange 5 and lower flange 4 are in planar contact and are dimensionally matched.

[0027] The compression rib 6 is located on the lower flange 4, protruding upwards from the surface of the lower flange 4, and has a cross-section in the form of a trapezoid, rectangle, or semi-circular arc. The compression rib 6 is arranged in a ring around the surface of the lower flange 4. The sealing ring 7 is located on the upper flange 5, embedded in the surface of the upper flange 5, and is arranged in a ring, with its cross-section matching that of the compression rib 6. The sealing ring 7 is made of elastic materials such as rubber or silicone, and has elastic deformation capability, allowing it to deform laterally under compression. The groove is located in the middle of the sealing ring 7, along the surface of the sealing ring 7, and its shape corresponds to that of the compression rib 6. The width of the compression rib 6 is greater than the width of the groove. When the junction box 1 and the protective cover 2 are closed, pressing the protective cover 2 downwards allows the compression rib 6 to be embedded in the groove. The compression rib 6 and the groove have an interference fit, causing the sealing ring 7 to deform laterally under pressure, filling the gap between the compression rib 6 and the groove, achieving a sealing connection between the compression rib 6 and the sealing ring 7, and improving the sealing performance. The limiting mechanism and locking mechanism are located between the lower flange 4 and the upper flange 5. The limiting mechanism is symmetrically arranged on both sides of the junction box 1 to limit the lower flange 4 and the upper flange 5 after the cover is closed, preventing the sealing ring 7 from springing back and separating from the pressing rib 6. The locking mechanism is arranged opposite to the hinge side of the junction box 1, and can achieve a tight connection between the junction box 1 and the protective cover 2 by means of plugging, screwing, etc.

[0028] This utility model, by setting up a pressing rib 6 and a sealing ring 7, allows for the following installation: When the transmitter 3 needs to be installed, it is placed in the junction box 1 and connected to the power supply, sensor, and other components. Then, the protective cover 2 is flipped up to close the junction box 1, and the pressing rib 6 is embedded in the groove of the sealing ring 7. The protective cover 2 is pressed down, and the sealing ring 7 deforms laterally under the pressure of the pressing rib 6, sealing the gap between it and the pressing rib 6, thus achieving a sealed connection between the pressing rib 6 and the sealing ring 7. Finally, the lower flange 4 and the upper flange 5 are limited and fixed by a limiting mechanism to prevent springback, and then the connection is tightened by a locking mechanism, thereby improving the sealing and protection, and avoiding the problems of repeated rotation of threads causing rust and stripping, and the sealing ring 7 being exposed and prone to aging and deformation.

[0029] In this embodiment, preferably, the cross-section of the compression rib 6 is trapezoidal, with a rounded top transition, the groove is matched with the compression rib 6, and the sidewall is interference-fitted with the compression rib 6.

[0030] The cross-section of the compression rib 6 is trapezoidal, which can be an isosceles trapezoid. The bottom of the compression rib 6 fits against the lower flange 4, and the top of the compression rib 6 has a rounded transition. The width of the bottom of the compression rib 6 is greater than the width of the top. The groove is matched with the compression rib 6 and is also trapezoidal. The width of the groove opening is greater than the width of the groove bottom. In addition, the overall width of the compression rib 6 is greater than the overall width of the groove. This can be understood as the sidewall of the compression rib 6 abutting against the sidewall of the groove after the compression rib 6 is inserted into the groove, providing lateral thrust to the sidewall of the groove, causing the sealing ring 7 to deform laterally, thus achieving an interference fit between the compression rib 6 and the sealing ring 7.

[0031] In this embodiment, preferably, the limiting mechanism includes a retaining ring 8 symmetrically disposed on the outer edge of the lower flange 4, and an insert plate 9 matching the retaining ring 8. The insert plate 9 is disposed on the outer edge of the upper flange 5 and is movably inserted into the retaining ring 8.

[0032] Two retaining rings 8 are symmetrically arranged on the outer edge of the lower flange 4, and are positioned relative to the left and right sides of the lower flange 4. An insert plate 9 is located on the outer edge of the upper flange 5, matching and corresponding to the retaining rings 8. The retaining ring 8 has a hole for accommodating the insert plate 9, and the retaining ring 8 is movably inserted into the hole, thereby achieving the limiting and fixing of the upper flange 5 and the lower flange 4.

[0033] In this embodiment, preferably, the outer edge of the upper flange 5 is provided with an ear 10 for mounting the insert plate 9. The insert plate 9 is movably connected to the ear 10 and is inserted downward into the retaining ring 8.

[0034] The lugs 10 are located on the outer edge of the upper flange 5 and correspond one-to-one with the insert plates 9, providing installation space for the insert plates 9. The insert plates 9 and lugs 10 are movably connected, which can be through sliding connection, rotational connection, etc. The insert plates 9 extend downward relative to the lugs 10, thereby inserting into the retaining ring 8. In addition, the top of the insert plate 9 may be provided with a latch, and the top of the lugs 10 has a latch that matches the latch. After the insert plate 9 is separated from the retaining ring 8, it can be fixed in the latch within the latch to avoid affecting the wiring operation.

[0035] In this embodiment, preferably, the ear 10 and the retaining ring 8 are provided with openings on the same side for the insertion plate 9 to enter and exit. The insertion plate 9 is sway-connected to the ear 10 and is inserted into the retaining ring 8 through the openings.

[0036] Both the ear portion 10 and the retaining ring 8 are U-shaped structures, and both have openings on the same side, allowing the insert plate 9 to move in and out through the openings. The top of the insert plate 9 is hinged to the ear portion 10, allowing it to swing downwards relative to the ear portion 10. When the protective cover 2 is open, the insert plate 9 is placed horizontally and fixed inside the ear portion 10. After the protective cover 2 is closed, the insert plate 9 is swung downwards at a 90-degree angle, and the bottom of the insert plate 9 is inserted into the retaining ring 8 through the opening, thus achieving the limiting and fixing of the ear portion 10 and the retaining ring 8.

[0037] In this embodiment, preferably, the insert plate 9 has an L-shaped structure and its end extends toward the retaining ring 8. One end of the insert plate 9 is hinged to the ear 10, and the other end of the insert plate 9 is engaged with the bottom of the retaining ring 8.

[0038] The insert plate 9 has an L-shaped structure, with one end extending upwards and hinged to the ear 10. The other end of the insert plate 9 extends horizontally towards the retaining ring 8 and is positioned relative to the bottom of the retaining ring 8. After the protective cover 2 is closed, the insert plate 9 is swung downwards at a 90-degree angle, and the middle part of the insert plate 9 is inserted into the retaining ring 8 through the opening. The bottom of the insert plate 9 engages with the bottom of the retaining ring 8, thereby hooking the retaining ring 8 and limiting the position of the insert plate 9, preventing the insert plate 9 from moving upwards.

[0039] In this embodiment, preferably, the locking mechanism includes a threaded sleeve 11 located on the outer edge of the upper flange 5 and a screw 12 located on the outer edge of the lower flange 4. The bottom of the threaded sleeve 11 is provided with a threaded cavity that is screwed and fixed to the screw 12.

[0040] The locking mechanism is positioned relative to the front side of the junction box 1 and includes a matching threaded sleeve 11 and a screw 12. The threaded sleeve 11 is located on the outer edge of the upper flange 5 and extends downward relative to the upper flange 5. The bottom of the threaded sleeve 11 has an upward-opening threaded cavity with internal threads inside. The screw 12 is located on the outer edge of the lower flange 4 and extends upward relative to the lower flange 4. The outer side of the screw 12 has external threads that match the threaded cavity. The screw 12 is inserted into the threaded sleeve 11 and is threadedly connected to the threaded sleeve 11.

[0041] In this embodiment, preferably, the outer edge of the upper flange 5 is provided with a tongue 13 that is slidably connected to the threaded sleeve 11, and the outer edge of the lower flange 4 is provided with a tongue 14 that is threadedly connected to the screw 12, with the tongue 13 and the tongue 14 in close contact.

[0042] The tongue 13 extends forward relative to the outer edge of the upper flange 5. The tongue 13 has a through hole, and the threaded sleeve 11 is inserted into the through hole and slidably connected to it. The rod tongue 14 extends forward relative to the outer edge of the lower flange 4. The rod tongue 14 has a through threaded hole, and the rod tongue 14 is inserted into the threaded hole and threadedly connected to it. After the protective cover 2 is closed, the upper flange 5 abuts against the lower flange 4, the tongue 13 and the rod tongue 14 are in close contact, the threaded sleeve 11 slides downward and extends out, inserts into the rod tongue 14, and is threadedly connected to the screw 12.

[0043] In this embodiment, preferably, the tongue 14 is provided with a stepped groove 15 coaxially arranged with the screw 12, and the bottom of the screw sleeve 11 is inserted into the stepped groove 15 and threadedly connected to the screw 12.

[0044] The stepped groove 15 is located on the tongue 14, extending downwards from the surface of the tongue 14 and arranged in a stepped manner with the screw hole. The stepped groove 15 is coaxially arranged with the screw 12 and is sleeved on the bottom of the sleeve 11. After the protective cover 2 is closed, the tongue 13 is in close contact with the tongue 14, and the sleeve 11 slides downwards and extends out, sleeved inside the stepped groove 15. The top of the sleeve 11 abuts against the end face of the tongue 13, and the bottom of the sleeve 11 abuts against the bottom surface of the stepped groove 15, and then is threadedly connected to the screw 12, thereby limiting the sliding stroke of the sleeve 11.

[0045] In this embodiment, preferably, the bottom of the screw 12 is provided with a dial that can be manually turned. The dial is fixedly connected to the screw 12 and protrudes outward relative to the outer edge of the tongue 14.

[0046] The dial is located at the bottom of the screw 12 and is fixedly connected to the screw 12 for hand operation. The dial has a disc-shaped structure and protrudes outward relative to the outer edge of the lever tongue 14 for easy hand operation. By manually turning the dial, the screw 12 can be rotated, thereby screwing and fixing it to the screw sleeve 11.

[0047] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature transmitter comprising an open-top junction box, a protective cover hingedly connected to the junction box, and a transmitter disposed within the junction box, characterized by: The junction box has an opening with an outwardly extending lower flange. The protective cover has an upper flange that mates with the lower flange. The lower flange has upwardly protruding pressing ribs that are distributed in a ring and surround the surface of the lower flange. The upper flange is fitted with an annular sealing ring. The sealing ring has a groove corresponding to the pressing ribs. The pressing ribs are fitted into the grooves and are sealed to the sealing ring. A limiting mechanism and a locking mechanism are provided between the lower flange and the upper flange. The locking mechanism is positioned opposite to the hinge side of the junction box, and the limiting mechanism is symmetrically positioned on both sides of the junction box.

2. The temperature transmitter of claim 1 wherein: The cross-section of the compression rib is trapezoidal, with a rounded top transition. The groove is matched with the compression rib, and the sidewall is interference-fitted with the compression rib.

3. The temperature transmitter of claim 1 wherein: The limiting mechanism includes retaining rings symmetrically arranged on the outer edge of the lower flange, and insert plates that match the retaining rings. The insert plates are arranged on the outer edge of the upper flange and are movably inserted into the retaining rings.

4. The temperature transmitter of claim 3 wherein: The outer edge of the upper flange is provided with an ear for installing a plate. The plate is movably connected to the ear and is inserted downward into the retaining ring.

5. The temperature transmitter of claim 4 wherein: The ear and the retaining ring are both provided with openings on the same side for the insertion plate to enter and exit. The insertion plate is swayingly connected to the ear and is inserted into the retaining ring through the opening.

6. The temperature transmitter of claim 5 wherein: The insert plate has an L-shaped structure, with its end extending towards the retaining ring. One end of the insert plate is hinged to the ear, and the other end of the insert plate is engaged with the bottom of the retaining ring.

7. The temperature transmitter of claim 1 wherein: The locking mechanism includes a threaded sleeve located on the outer edge of the upper flange and a screw located on the outer edge of the lower flange. The bottom of the threaded sleeve is provided with a threaded cavity that is screwed and fixed to the screw.

8. The temperature transmitter of claim 7 wherein: The outer edge of the upper flange is provided with a tongue that slides with the threaded sleeve, and the outer edge of the lower flange is provided with a tongue that is threaded with the screw. The tongue and the tongue are in close contact.

9. The temperature transmitter of claim 8 wherein: The tongue is provided with a stepped groove coaxial with the screw, and the bottom of the screw sleeve is inserted into the stepped groove and threadedly connected to the screw.

10. The temperature transmitter of claim 9 wherein: The bottom of the screw is provided with a dial that can be manually turned. The dial is fixedly connected to the screw and protrudes outward relative to the outer edge of the tongue.

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