Positive pressure ventilation air door connecting structure of distribution room in explosion-proof workshop

Abstract

The utility model provides a positive pressure ventilation air door connecting structure of a power distribution room in an explosion-proof workshop, which comprises an air door arranged on the outer side wall of the power distribution room in the explosion-proof workshop, a ventilation opening is arranged on the inner side wall of the power distribution room, and a groove with the peripheral size larger than that of the ventilation opening is arranged on the outer side wall of the power distribution room corresponding to the ventilation opening. The air door is rotationally connected into the groove and can cover the ventilation opening, connecting shafts are horizontally and outwards arranged at the two ends of the upper side of the air door, and positioning pins capable of abutting against the connecting shafts are further arranged in the groove. The beneficial effects of the utility model are that the air door turns over through the rotation of the connecting shaft, and the peripheral size of the groove is larger than the peripheral size of the ventilation opening, so that the air door is installed in the groove, the ventilation opening can be blocked through the air door, and airflow in the explosion-proof workshop is prevented from entering the distribution room; and after the turnover position of the air door is adjusted according to actual requirements, the positioning pin abuts against the connecting shaft to fix the position of the air door, and different constant-pressure requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of positive pressure ventilation in the power distribution room, and particularly relates to a connecting structure of a positive pressure ventilation air door in a power distribution room in an explosion-proof workshop. Background Technique

[0002] Explosion-proof Zone 2 refers to an environment where flammable gases, vapors or dusts exist, but these combustible substances only exist under abnormal conditions and only appear for a short time, such as leakage or faults. In a workshop belonging to Explosion-proof Zone 2, there is usually no power distribution room. However, for old workshops, there may be a power distribution room. In order to continue using such workshops, it is only necessary to reconstruct the original power distribution room into a positive pressure room without moving the workshop out. This can avoid the ignition risk brought by the operation of non-positive pressure power distribution equipment and meet the requirements of current explosion-proof codes. However, for positive pressure rooms, there are also different differential pressure requirements. Therefore, how to set a general-purpose positive pressure ventilation air door is of great significance. Content of the Utility Model

[0003] In view of this, the utility model aims to overcome the above deficiencies in the prior art and proposes a connecting structure of a positive pressure ventilation air door in a power distribution room in an explosion-proof workshop.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A connecting structure of a positive pressure ventilation air door in a power distribution room in an explosion-proof workshop includes an air door arranged on the outer side wall of the power distribution room in the explosion-proof workshop. A ventilation opening is provided on the inner side wall of the power distribution room. A groove with an outer dimension larger than that of the ventilation opening is provided on the outer side wall of the power distribution room corresponding to the ventilation opening. The air door is rotatably connected in the groove and can cover the ventilation opening. Both ends of the upper side of the air door are horizontally provided with connecting shafts outward. A positioning pin capable of abutting against the connecting shaft is further provided in the groove.

[0006] Furthermore, C-shaped grooves communicating with the groove are respectively provided on the upper sides of the left and right side walls of the groove. A semi-circular first limiting groove is provided at the bottom of each C-shaped groove. A limiting block is fixedly connected in each groove. A semi-circular second limiting groove corresponding to the first limiting groove is provided at the bottom of the limiting block. The first limiting groove and the second limiting groove are butted together to form a limiting groove body. The connecting shaft is inserted into the limiting groove body. A threaded hole communicating with the second limiting groove is provided on the upper side of the limiting block. The lower part of the positioning pin is screwed into the threaded hole. A rubber pad with a cross-sectional dimension smaller than that of the positioning pin is fixedly connected to the bottom end of the positioning pin.

[0007] Further, a limiting platform integrally formed with the side wall of the power distribution room is provided at the lower part of the front side of the C-shaped groove. The lower part of the limiting block is embedded in the rear side of the limiting platform, and a notch is provided at the upper part of the front side of the limiting block, and a counterbore is provided on the rear side wall of the notch. A fixing hole with an internal threaded hole is provided on the side wall of the power distribution room corresponding to the counterbore. The limiting block is fixedly connected in the C-shaped groove through the cooperation of the screw with the counterbore and the fixing hole.

[0008] Further, a counterweight part is provided at the upper end of the air door and extends backward, and the upper end surface of the counterweight part is of a semi-circular structure. When the air door is in a vertical state, the rear side wall of the counterweight part is closely attached to the stop surface between the groove and the ventilation opening, and the connecting shaft is fixedly connected to both sides of the counterweight part.

[0009] Further, a thickening block is fixedly connected to the front side of the stop surface between the lower sides of the groove and the ventilation opening. When the air door is in a vertical state, the lower side of the rear side wall of the air door is closely attached to the front side wall of the thickening block.

[0010] Further, a slide rail is vertically fixedly connected to the front side of the air door, a slider is connected to the slide rail, and a fixing pin with an inner end capable of pressing against the slide rail is screwed to the front side of the slider.

[0011] Compared with the prior art, the present utility model has the following advantages:

[0012] In the positive pressure ventilation air door connection structure of the power distribution room in the explosion-proof workshop of the present utility model, the air door rotates through the connecting shaft for flipping, and the outer dimension of the groove is set to be larger than the outer dimension of the ventilation opening, so that the air door is installed in the groove, and the ventilation opening can be blocked by the air door to prevent the air flow in the explosion-proof workshop from entering the power distribution room; and the flipping position of the air door can be adjusted according to actual needs, and then the position of the air door can be fixed by pressing the connecting shaft with the positioning pin to meet different constant pressure requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0014] Figure 1 is a schematic diagram of the air door connection structure described in the embodiment of the present utility model;

[0015] Figure 2 is a schematic diagram of the structure of the side wall of the power distribution room after removing the air door described in the embodiment of the present utility model;

[0016] Figure 3 is a schematic diagram of the connection structure part of the limiting block in the C-shaped groove described in the embodiment of the present utility model;

[0017] Figure 4 is a schematic diagram of the structure of the limiting block described in the embodiment of the present utility model;

[0018] Figure 5 This is a cross-sectional view of the air damper connection structure described in the embodiments of the present utility model.

[0019] Explanation of reference numerals in the drawings:

[0020] 1. Power distribution room; 11. Groove; 12. Ventilation opening; 13. First limiting groove; 14. C-shaped groove; 15. Limiting platform; 2. Air damper; 21. Counterweight part; 3. Limiting block; 31. Second limiting groove; 32. Threaded hole; 33. Counterbore; 34. Notch; 4. Positioning pin; 5. Slide rail; 6. Slide block; 7. Fixed pin; 8. Rubber pad; 9. Thickening block. Specific embodiments

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0024] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0025] As shown in the figure, a positive pressure ventilation air door connection structure for a power distribution room in an explosion-proof workshop includes an air door 2 provided on the outer wall of the power distribution room 1 in the explosion-proof workshop. A ventilation opening 12 is provided on the inner wall of the power distribution room 1, and a groove 11 with an outer dimension larger than that of the ventilation opening 12 is provided on the outer wall of the power distribution room 1 corresponding to the ventilation opening 12. The air door 2 is rotatably connected in the groove 11 and can cover the ventilation opening 12. Both ends of the upper side of the air door 2 are horizontally provided with connecting shafts outward, and a positioning pin 4 capable of abutting against the connecting shafts is further provided in the groove 11. In this embodiment, the air inlet of the power distribution room 1 is communicated with the outside atmosphere, and the air outlet is the ventilation opening 12. The air flow flows through the air door 2 in the power distribution room 1 and then into the explosion-proof workshop. The air door 2 is turned by rotating the connecting shafts. And the outer dimension of the groove 11 is set larger than that of the ventilation opening 12, so that the air door 2 is installed in the groove 11, and the ventilation opening 12 can be blocked by the air door 2 to prevent the air flow in the explosion-proof workshop from entering the power distribution room 1. And the turning position of the air door 2 can be adjusted according to actual needs, and then the position of the air door 2 can be fixed by abutting the positioning pin 4 against the connecting shafts.

[0026] C-shaped grooves 14 communicated with the groove 11 are provided on the upper sides of the left and right side walls of the groove 11, and semi-circular first limiting grooves 13 are provided at the bottoms of each C-shaped groove 14. A limiting block 3 is fixedly connected in each groove 11, and semi-circular second limiting grooves 31 corresponding to the first limiting grooves 13 are provided at the bottoms of the limiting blocks 3. The first limiting groove 13 and the second limiting groove 31 are butted together to form a limiting groove body. The connecting shaft is inserted into the limiting groove body. A threaded hole 32 communicated with the second limiting groove 31 is provided on the upper side of the limiting block 3. The lower part of the positioning pin 4 is screwed into the threaded hole 32, and a rubber pad 8 with a cross-sectional dimension smaller than that of the positioning pin 4 is fixedly connected to the bottom end of the positioning pin 4. In this embodiment, the rubber pad 8 is set to have a cross-sectional dimension smaller than that of the positioning pin 4. When the connecting shaft needs to be positioned and fixed, it is ensured that when the positioning pin 4 is screwed and moved downward in the threaded hole 32, the rubber pad 8 is smoothly driven to move downward in the threaded hole 32 until the positioning pin 4 abuts against the connecting shaft, and the positioning of the connecting shaft is further strengthened by the rubber pad 8. Of course, according to the actual situation, if the connecting shaft does not need to be positioned, there is no need to make the positioning pin 4 abut against the connecting shaft. In this embodiment, the positioning pin 4 can not only play a role in positioning and fixing the connecting shaft, but also play a role of a handle when disassembling and assembling the limiting block 3, which is convenient for taking and placing the limiting block 3.

[0027] At the lower part of the front side of the U-shaped groove 14, there is a limiting platform 15 integrally formed with the side wall of the power distribution room 1. The lower part of the limiting block 3 is embedded in the rear side of the limiting platform 15. An upper part of the front side of the limiting block 3 is provided with a notch 34, and a counterbore 33 is formed on the rear side wall of the notch 34. A fixing hole with an internal threaded hole 32 is provided on the side wall of the power distribution room 1 corresponding to the counterbore 33. The limiting block 3 is fixedly connected in the U-shaped groove 14 through the cooperation of the screw with the counterbore 33 and the fixing hole. In this embodiment, the lower part of the limiting block 3 is limited by the limiting platform 15, and the upper part is fixedly connected in the U-shaped groove 14 through the screw, realizing the fixation of the limiting block 3, making the disassembly and assembly of the limiting block 3 convenient and also facilitating the installation of the air door 2 in the groove 11.

[0028] The upper end of the air door 2 is provided with a counterweight part 21 backward. The upper end surface of the counterweight part 21 is a semi-circular structure tangent to the stop surface between the groove 11 and the ventilation opening 12, which is convenient for the air door 2 to rotate along the connecting shaft without being restricted by the side wall of the power distribution room 1. When the air door 2 is in the vertical state, the rear side wall of the counterweight part 21 is tightly attached to the stop surface between the groove 11 and the ventilation opening 12, and the connecting shaft is fixedly connected to both sides of the counterweight part 21. In this embodiment, by providing the counterweight part 21 at the upper end of the air door 2 backward, it is convenient for the air door 2 to flip forward due to the top center of gravity factor.

[0029] A thickening block 9 is fixedly connected to the front side of the stop surface between the lower sides of the groove 11 and the ventilation opening 12. When the air door 2 is in the vertical state, the lower side of the rear side wall of the air door 2 is tightly attached to the front side wall of the thickening block 9, and in cooperation with the counterweight part 21, it ensures that when the air door 2 is in the vertical state, it can completely cover the ventilation opening 12.

[0030] A T-shaped slide rail 5 is vertically fixedly connected to the front side of the air door 2. A slider 6 is connected to the slide rail 5, and a fixing pin 7 with an inner end that can abut against the slide rail 5 is screwed to the front side of the slider 6. After adjusting the position of the slider 6 in place according to actual needs, tighten the fixing pin 7 to fix the slider 6; and with such a setting, the air door 2 is suitable for the constant pressure requirements of different pressure differences inside and outside the power distribution room 1.

[0031] In this embodiment, the air door 2 flips by rotating around the connecting shaft, and the flipping position of the air door 2 can be adjusted according to actual needs and then fixed by the positioning pin 4 abutting against the connecting shaft to meet different constant pressure requirements; of course, if it is not necessary to lock the air door 2 with the positioning pin 4, the positioning pin 4 can also serve as a handle, facilitating the taking and placing of the limiting block 3 during disassembly and assembly; in addition, the position of the slider 6 on the slide rail 5 can be adjusted to make the air door 2 suitable for the constant pressure requirements of different pressure differences inside and outside the power distribution room 1. The air door connection structure meets the diverse usage requirements.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A positive pressure ventilation damper connection structure of a power distribution room in an explosion-proof workshop, characterized in that: It includes a damper arranged on the outer side wall of the distribution room in the explosion-proof workshop. A ventilation opening is provided on the inner side wall of the distribution room. A groove with an outer dimension larger than that of the ventilation opening is provided on the outer side wall of the distribution room corresponding to the ventilation opening. The damper is rotatably connected in the groove and can cover the ventilation opening. Both ends of the upper side of the damper are horizontally and outwardly provided with connecting shafts, and a positioning pin capable of pressing against the connecting shafts is also provided in the groove.

2. The positive pressure ventilation damper connection structure of the power distribution room in the explosion-proof workshop according to claim 1 is characterized in that: C-shaped grooves communicating with the groove are provided on the upper sides of the left and right side walls of the groove, and semi-circular first limiting grooves are provided at the bottoms of each C-shaped groove. A limiting block is fixedly connected in each groove, and semi-circular second limiting grooves corresponding to the first limiting grooves are provided at the bottoms of the limiting blocks. The first limiting groove and the second limiting groove are butted together to form a limiting groove body. The connecting shaft is inserted into the limiting groove body. A threaded hole communicating with the second limiting groove is provided on the upper side of the limiting block. The lower part of the positioning pin is screwed into the threaded hole, and a rubber pad with a cross-sectional dimension smaller than that of the positioning pin is fixedly connected to the bottom end of the positioning pin.

3. The positive pressure ventilation damper connection structure of the power distribution room in the explosion-proof workshop according to claim 2 is characterized in that: A limiting platform integrally formed with the side wall of the distribution room is provided at the lower part of the front side of the C-shaped groove. The lower part of the limiting block is embedded in the rear side of the limiting platform. A notch is provided at the upper part of the front side of the limiting block, and a counterbore is provided on the rear side wall of the notch. A fixing hole with an internal threaded hole is provided on the side wall of the distribution room corresponding to the counterbore. The limiting block is fixedly connected in the C-shaped groove through the cooperation of the screw with the counterbore and the fixing hole.

4. The positive pressure ventilation damper connection structure of the power distribution room in an explosion-proof workshop according to claim 1 is characterized in that: A counterweight part is provided at the upper end of the damper and extends backward. The upper end surface of the counterweight part is of a semi-circular structure. When the damper is in a vertical state, the rear side wall of the counterweight part is closely attached to the stop surface between the groove and the ventilation opening. The connecting shafts are fixedly connected to both sides of the counterweight part.

5. The positive pressure ventilation damper connection structure of the power distribution room in the explosion-proof workshop according to claim 4 is characterized in that: A thickening block is fixedly connected to the front side of the stop surface between the lower sides of the groove and the ventilation opening. When the damper is in a vertical state, the lower side of the rear side wall of the damper is closely attached to the front side wall of the thickening block.

6. The positive pressure ventilation damper connection structure of the power distribution room in an explosion-proof workshop according to claim 1 is characterized in that: A slide rail is vertically fixedly connected to the front side of the damper. A slider is connected to the slide rail, and a fixing pin with an inner end capable of pressing against the slide rail is screwed to the front side of the slider.

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