A flameproof junction box

Abstract

The present invention relates to the field of solenoid valves, and in particular to a flameproof junction box, the flameproof junction box comprising: a flameproof solenoid valve body, a junction box fixedly mounted on the wiring terminal of the flameproof solenoid valve body, a junction box cover slidably mounted on the top of the junction box, and a U-shaped positioning frame fixedly mounted on the bottom of the central axis of the junction box cover. When the flameproof junction box provided by the present invention needs to open the junction box cover for maintenance of the solenoid valve, the power supply of the solenoid valve needs to be cut off. At this time, the electromagnet will be powered off to cancel the pulling on the fixing seat, thereby canceling the fixing of the junction box position by the positioning rod. At this time, the auxiliary positioning rod is slid out of the positioning groove by the reaction force of the torsion spring, and the junction box cover can be removed. If the power supply of the solenoid valve is not cut off, the positioning rod will not slide out of the positioning groove, and is used to fix the position of the junction box cover, thereby improving the safety of maintenance.

Description

Technical Field

[0001] The invention relates to the field of solenoid valves, and in particular to a flameproof junction box. Background Art

[0002] The explosion-proof solenoid valve is a directly controlled two-position two-normally closed structure. The upper part of the valve body is a special electromagnet, which serves as the power source for directly opening and closing the valve. After power is turned on, under the action of the electromagnetic effect, the movable iron core generates a sufficiently large attraction to overcome the spring and medium pressure, so that the movable iron core is separated from the water guide valve port, the valve port is opened, and the medium flows. On the contrary, when power is off, under the action of the spring and medium pressure, the movable iron core closes the water guide valve and the medium cannot flow.

[0003] As a safety solenoid valve, the operation of the explosion-proof solenoid valve during use is also particularly important. When the junction box cover needs to be opened for solenoid valve maintenance, make sure that the power supply has been cut off before opening the cover to avoid safety accidents. However, due to people's wrong usage habits, some workers will open the junction box cover from the junction box when the power is still on. This operation is very dangerous.

[0004] Therefore, it is necessary to provide a new flameproof junction box to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a flameproof junction box.

[0006] The flameproof junction box provided by the present invention comprises:

[0007] The flameproof solenoid valve body has a wiring terminal fixedly installed with a junction box, a junction box cover is slidably installed on the top of the junction box, a U-shaped positioning frame is fixedly installed at the bottom of the central axis of the junction box cover, the wiring passes through the middle of the U-shaped positioning frame and the junction box cover, and a positioning groove is opened on one side of the U-shaped positioning frame. The shell, junction box and junction box cover of the flameproof solenoid valve body are made of die-cast aluminum alloy, wherein the copper content in the aluminum alloy is less than 0.3%, which can improve the flameproof performance of the flameproof solenoid valve body;

[0008] Positioning rod, the positioning rod is rotatably installed on the inner wall of the junction box through an axle pin. The positioning rod will rotate due to the power supply of the flameproof solenoid valve body, and the positioning rod will rotate and be stuck in the positioning groove to fix the position of the junction box cover;

[0009] The un-carding rod is installed at the bottom of the U-shaped positioning frame. The un-carding rod will fit with one side of the positioning rod. After the power is removed from the explosion-proof solenoid valve body, the positioning rod will be squeezed and driven to rotate. The inner wall of the explosion-proof solenoid valve body is fixedly installed with a mounting block, and one side of the mounting block is fixedly installed with an electromagnet. The electromagnet will operate due to the power supply to the explosion-proof solenoid valve body. The moving end of the electromagnet is fixedly installed with a fixing seat. A slide groove is provided on one side of the positioning rod, and a slider is slidably installed inside the slide groove. One side of the slider is rotatably connected to the fixing seat through an axle pin. The positioning rod is in a vertical state with the U-shaped positioning frame under the pull of the electromagnet. At this time, the positioning rod will be completely received in the positioning groove. After the solenoid valve is energized, the electromagnet will also be energized. At this time, the electromagnet will drive the fixed seat to move, and then pull the slider, which can drive the slider to slide inside the slide slot and drive the positioning rod to rotate. The positioning rod is inserted into the positioning slot to fix the position of the junction box. When the junction box cover needs to be opened for maintenance of the solenoid valve, the power supply of the solenoid valve needs to be cut off. At this time, the electromagnet will be powered off to cancel the pulling of the fixed seat, and then cancel the fixation of the junction box position by the positioning rod. At this time, the auxiliary positioning rod will slide out of the positioning slot through the reaction force of the torsion spring, and then the junction box cover can be removed. If the power supply of the solenoid valve is not cut off, the positioning rod will not slide out of the positioning slot, which is used to fix the position of the junction box cover and improve the safety of maintenance.

[0010] Preferably, a first chamfer is provided on one side of the U-shaped positioning frame corresponding to the positioning groove, so as to facilitate the alignment and insertion of the positioning rod into the positioning groove.

[0011] Preferably, the inner wall of the flameproof solenoid valve body is provided with a receiving groove for limiting the position of the positioning rod corresponding to the position of the positioning rod, and the end of the positioning rod will be received in the receiving groove when the electromagnet is powered off, so as to locate the end of the positioning rod.

[0012] Preferably, a fixing rod is fixedly installed at the bottom of the U-shaped positioning frame, a rotating plate is rotatably installed on the outer side of the fixing rod, the top of one end of the rotating plate away from the fixing rod is fixedly connected to the de-carding rod, a torsion spring is sleeved on the outer side of the end of the fixing rod, one end of the torsion spring is fixedly connected to the bottom of the U-shaped positioning frame, and the other end of the torsion spring is fixedly connected to the rotating plate.

[0013] Preferably, the rotating plate is elastically connected to the U-shaped positioning frame via a torsion spring, and the elastic force of the torsion spring drives the rotating plate to rotate, thereby assisting the positioning rod to slide out of the positioning groove.

[0014] Preferably, a sealing ring is installed on the outer side of the junction box cover corresponding to the position where the junction box cover contacts the upper surface of the junction box, so as to seal between the junction box cover and the junction box.

[0015] Preferably, the junction box cover and the junction box are provided with alignment grooves for aligning the junction box cover and the junction box, so that the junction box cover and the junction box can be installed correspondingly.

[0016] Preferably, a second chamfer is provided at the bottom of the junction box cover, so as to facilitate sliding the junction box cover onto the top of the junction box.

[0017] Preferably, the wiring terminals of the flameproof solenoid valve body are fixedly connected to the junction box by bolts.

[0018] Preferably, the U-shaped positioning frame adopts a hollow design.

[0019] Compared with the prior art, the flameproof junction box provided by the present invention has the following beneficial effects:

[0020] The present invention provides a flameproof junction box. When the junction box cover is installed on the top of the junction box, when the junction box cover needs to be opened for maintenance of the solenoid valve, the power supply of the solenoid valve needs to be cut off. At this time, the electromagnet will be powered off to cancel the pulling of the fixing seat, thereby canceling the fixing of the junction box position by the positioning rod. At this time, the auxiliary positioning rod is slid out of the positioning groove through the reaction force of the torsion spring, and the junction box cover can be removed. If the power supply of the solenoid valve is not cut off, the positioning rod will not slide out of the positioning groove, which is used to fix the position of the junction box cover and improve the safety of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure of the flameproof junction box provided by the present invention;

[0022] Figure 2 for Figure 1 One of the partial cross-sectional exploded structure schematic diagrams shown;

[0023] Figure 3 for Figure 1 The second schematic diagram of the partial cross-section explosion structure shown;

[0024] Figure 4 for Figure 1 The partial cross-sectional structural schematic diagram shown;

[0025] Figure 5 for Figure 1 Schematic diagram of the local structure shown.

[0026] Numbers in the figure: 1. Flameproof solenoid valve body; 2. Junction box; 3. Junction box cover; 4. U-shaped positioning frame; 5. Positioning groove; 6. Positioning rod; 7. Release rod; 8. Mounting block; 9. Electromagnet; 10. Fixed seat; 11. Slide groove; 12. Slider; 13. First chamfer; 14. Storage groove; 15. Fixed rod; 16. Rotating plate; 17. Torsion spring; 18. Sealing ring; 19. Alignment groove; 20. Second chamfer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0029] See also Figures 1 to 5 , an embodiment of the present invention provides a flameproof junction box, the flameproof junction box comprising:

[0030] A flameproof solenoid valve body 1, a terminal of the flameproof solenoid valve body 1 is fixedly installed with a junction box 2, a junction box cover 3 is slidably installed on the top of the junction box 2, a U-shaped positioning frame 4 is fixedly installed at the bottom of the central axis of the junction box cover 3, the wiring passes through the middle of the U-shaped positioning frame 4 and the junction box cover 3, and a positioning groove 5 is opened on one side of the U-shaped positioning frame 4. The shell, junction box 2 and junction box cover 3 of the flameproof solenoid valve body 1 are made of die-cast aluminum alloy (ZL102), wherein the copper content in the aluminum alloy is less than 0.3%, which can improve the flameproof performance of the flameproof solenoid valve body 1;

[0031] The positioning rod 6 is rotatably mounted on the inner wall of the junction box 2 through an axle pin. The positioning rod 6 will rotate due to the power supply of the flameproof solenoid valve body 1, and the positioning rod 6 will rotate and be stuck in the positioning groove 5 to fix the position of the junction box cover 3;

[0032] The uncarding rod 7 is installed at the bottom of the U-shaped positioning frame 4. The uncarding rod 7 will fit with one side of the positioning rod 6. After the flameproof solenoid valve body 1 is de-energized, the positioning rod 6 will be squeezed and driven to rotate. The inner wall of the flameproof solenoid valve body 1 is fixedly installed with a mounting block 8, and one side of the mounting block 8 is fixedly installed with an electromagnet 9. The electromagnet 9 will operate due to the energization of the flameproof solenoid valve body 1. The moving end of the electromagnet 9 is fixedly installed with a fixing seat 10. A slide groove 11 is provided on one side of the positioning rod 6. A slider 12 is slidably installed inside the slide groove 11. One side of the slider 12 is rotatably connected to the fixing seat 10 through an axle pin. The slider 12 is in a vertical state with the U-shaped positioning frame 4 under the pull of the electromagnet 9. At this time, the positioning rod 6 will be completely received in the positioning groove 5. After the solenoid valve is energized, the electromagnet 9 will also be energized. At this time, the electromagnet 9 will drive the fixing seat 10 to move, and then pull the slider 12, which can drive the slider 12 to slide inside the slide groove 11, and drive the positioning rod 6 to rotate, and insert the positioning rod 6 into the positioning groove 5 to fix the position of the junction box 2. When the junction box cover 3 needs to be opened for maintenance of the solenoid valve, the power supply of the solenoid valve needs to be cut off. At this time, the electromagnet 9 will be powered off to cancel the pulling of the fixing seat 10, and then cancel the fixing of the junction box 2 position by the positioning rod 6. At this time, through the reaction force of the torsion spring 17, the auxiliary positioning rod 6 will slide out of the positioning groove 5, and the junction box cover 3 can be removed. If the power supply of the solenoid valve is not cut off, the positioning rod 6 will not slide out of the positioning groove 5, which is used to fix the position of the junction box cover 3 and improve the safety of maintenance.

[0033] See also Figures 1 to 5 The U-shaped positioning frame 4 has a first chamfer 13 on one side corresponding to the positioning groove 5 , so as to facilitate the positioning rod 6 to be aligned and inserted into the positioning groove 5 .

[0034] See also Figures 1 to 5 The inner wall of the flameproof solenoid valve body 1 is provided with a receiving groove 14 for limiting the position of the positioning rod 6 at the position corresponding to the positioning rod 6. When the electromagnet 9 is powered off, the end of the positioning rod 6 will be received in the receiving groove 14. The position of the end of the positioning rod 6 can be positioned.

[0035] See also Figures 1 to 5 A fixing rod 15 is fixedly installed at the bottom of the U-shaped positioning frame 4, and a rotating plate 16 is rotatably installed on the outer side of the fixing rod 15. The top of one end of the rotating plate 16 away from the fixing rod 15 is fixedly connected to the de-carding rod 7. A torsion spring 17 is sleeved on the outer side of the end of the fixing rod 15. One end of the torsion spring 17 is fixedly connected to the bottom of the U-shaped positioning frame 4, and the other end of the torsion spring 17 is fixedly connected to the rotating plate 16.

[0036] See also Figures 1 to 5The rotating plate 16 is elastically connected to the U-shaped positioning frame 4 through the torsion spring 17, and the elastic force of the torsion spring 17 drives the rotating plate 16 to rotate. When the junction box cover 3 needs to be opened for maintenance of the solenoid valve, the power supply of the solenoid valve is cut off, and the auxiliary positioning rod 6 slides out of the positioning groove 5 through the reaction force of the torsion spring 17.

[0037] See also Figures 1 to 5 A sealing ring 18 is installed on the outer side of the junction box cover 3 corresponding to the position where the junction box cover 3 contacts the upper surface of the junction box 2. The junction box cover 3 and the junction box 2 can be sealed.

[0038] See also Figures 1 to 5 The junction box cover 3 and the junction box 2 are provided with an alignment groove 19 for aligning the junction box cover 3 and the junction box 2. The junction box cover 3 and the junction box 2 can be installed correspondingly.

[0039] See also Figures 1 to 5 The bottom of the junction box cover 3 is provided with a second chamfer 20, so as to facilitate sliding the junction box cover 3 on the top of the junction box 2.

[0040] See also Figures 1 to 5 The connection terminal of the flameproof solenoid valve body 1 is fixedly connected to the junction box 2 by bolts. The method of fixing with bolts is simple and convenient.

[0041] See also Figures 1 to 5 The U-shaped positioning frame 4 is hollow in design, which saves materials and facilitates the installation of components in the junction box 2 through the U-shaped positioning frame 4.

[0042] When the device is in use, after the wiring is completed, the junction box cover 3 is slidably installed on the top of the junction box 2, and the junction box cover 3 is aligned with the alignment groove 19 on the junction box 2. After the solenoid valve is energized, the electromagnet 9 will also be energized. At this time, the electromagnet 9 will drive the fixing seat 10 to move, and then pull the slider 12, which can drive the slider 12 to slide inside the slide groove 11, and drive the positioning rod 6 to rotate, and insert the positioning rod 6 into the positioning groove 5 to fix the position of the junction box 2. In this process, the positioning rod 6 will squeeze the release rod 7, which will drive the torsion spring 17 to twist. When the solenoid valve is energized, the electromagnet 9 will also be energized. At this time, the electromagnet 9 will drive the fixing seat 10 to move, and then pull the slider 12, which can drive the slider 12 to slide inside the slide groove 11, and drive the positioning rod 6 to rotate. The positioning rod 6 is inserted into the positioning groove 5, and the position of the junction box 2 can be fixed. In this process, the positioning rod 6 will squeeze the release rod 7, which will drive the torsion spring 17 to twist. When the junction box cover 3 needs to be opened for maintenance, the solenoid valve power supply needs to be cut off. At this time, the electromagnet 9 will be powered off to cancel the pull on the fixed seat 10, and the slider 12 will slide reversely inside the slide groove 11, and drive the positioning rod 6 to rotate in the opposite direction, so that the positioning rod 6 slides out of the positioning groove 5, and the positioning rod 6 cancels the fixation of the junction box 2 position. At this time, the auxiliary positioning rod 6 slides out of the positioning groove 5 through the reaction force of the torsion spring 17, and the junction box cover 3 can be removed. If the solenoid valve power supply is not cut off, the positioning rod 6 will not slide out of the positioning groove 5, and it is used to fix the position of the junction box cover 3, thereby improving the safety of maintenance.

[0043] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flameproof junction box, characterized in that: include: A flameproof solenoid valve body (1), a wiring terminal of the flameproof solenoid valve body (1) is fixedly mounted with a junction box (2), a junction box cover (3) is slidably mounted on the top of the junction box (2), a U-shaped positioning frame (4) is fixedly mounted on the bottom of the central axis of the junction box cover (3), the wiring passes through the middle of the U-shaped positioning frame (4) and the junction box cover (3), and a positioning groove (5) is opened on one side of the U-shaped positioning frame (4), the shell of the flameproof solenoid valve body (1), the junction box (2) and the junction box cover (3) are made of die-cast aluminum alloy, wherein the copper content of the aluminum alloy is less than 0.3%; A positioning rod (6), the positioning rod (6) is rotatably mounted on the inner wall of the junction box (2) via an axle pin. The positioning rod (6) will rotate due to the power supply to the flameproof solenoid valve body (1), and the positioning rod (6) will rotate and be stuck in the positioning groove (5) to fix the position of the junction box cover (3); The card release rod (7) is installed at the bottom of the U-shaped positioning frame (4). The card release rod (7) will fit with one side of the positioning rod (6) and will squeeze the positioning rod (6) and drive the positioning rod (6) to rotate after the flameproof solenoid valve body (1) is powered off.

2. The flameproof junction box according to claim 1, characterized in that: The inner wall of the flameproof solenoid valve body (1) is fixedly mounted with a mounting block (8), one side of the mounting block (8) is fixedly mounted with an electromagnet (9), the electromagnet (9) will operate when the flameproof solenoid valve body (1) is energized, a fixed seat (10) is fixedly mounted on the movable end of the electromagnet (9), a sliding groove (11) is provided on one side of the positioning rod (6), a sliding block (12) is slidably mounted inside the sliding groove (11), and one side of the sliding block (12) is rotatably connected to the fixed seat (10) via an axle pin.

3. The flameproof junction box according to claim 1, characterized in that: A first chamfer (13) is provided on one side of the U-shaped positioning frame (4) corresponding to the positioning groove (5).

4. The flameproof junction box according to claim 2, characterized in that: The positioning rod (6) is in a vertical state with the U-shaped positioning frame (4) under the pulling of the electromagnet (9), and at this time, the positioning rod (6) is completely received in the positioning groove (5).

5. The flameproof junction box according to claim 2, characterized in that: The inner wall of the flameproof solenoid valve body (1) is provided with a receiving groove (14) for limiting the position of the positioning rod (6) at a position corresponding to the positioning rod (6); when the electromagnet (9) is powered off, the end of the positioning rod (6) will be received in the receiving groove (14).

6. The flameproof junction box according to claim 1, characterized in that: A fixing rod (15) is fixedly mounted on the bottom of the U-shaped positioning frame (4), a rotating plate (16) is rotatably mounted on the outer side of the fixing rod (15), the top of one end of the rotating plate (16) away from the fixing rod (15) is fixedly connected to the de-clip rod (7), a torsion spring (17) is sleeved on the outer side of the end of the fixing rod (15), one end of the torsion spring (17) is fixedly connected to the bottom of the U-shaped positioning frame (4), and the other end of the torsion spring (17) is fixedly connected to the rotating plate (16).

7. The flameproof junction box according to claim 6, characterized in that: The rotating plate (16) is elastically connected to the U-shaped positioning frame (4) via a torsion spring (17), and the elastic force of the torsion spring (17) drives the rotating plate (16) to rotate.

8. The flameproof junction box according to claim 1, characterized in that: A sealing ring (18) is installed on the outer side of the junction box cover (3) at a position corresponding to the contact between the junction box cover (3) and the upper surface of the junction box (2).

9. The flameproof junction box according to claim 8, characterized in that: The junction box cover (3) and the junction box (2) are provided with alignment grooves (19) for aligning the junction box cover (3) and the junction box (2).

10. The flameproof junction box according to claim 9, characterized in that: The bottom of the junction box cover (3) is provided with a second chamfer (20).

11. The flameproof junction box according to claim 1, characterized in that: The connection terminal of the flameproof solenoid valve body (1) is fixedly connected to the connection box (2) via bolts.

12. The flameproof junction box according to claim 7, characterized in that: The U-shaped positioning frame (4) adopts a hollow design.

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