Firm air leakage prevention equipment of civil engineering air duct

Abstract

The utility model relates to the technical field of civil air duct air leakage prevention, in particular to a firm air leakage prevention device of a civil air duct, which comprises an air duct body, a wind shield is arranged in the air duct body, a rubber plate is mounted on the outer side of the wind shield, and a limiting groove is formed in the bottom end of the air duct body. A limiting mechanism used for being connected with the air duct body in an auxiliary mode is arranged in the air baffle. A threaded hole is formed in the upper end of the air duct body, and a fixing mechanism used for being fixedly connected with the air duct body is arranged in the air baffle. The pressing cylinder is pressed downwards, the air baffle is sleeved with the air duct body till the limiting block is clamped into the limiting groove, and the air duct body and the air baffle can be fixedly connected in the next step conveniently; by rotating the limiting hoop, the buckle is shrunk inwards to be tightly connected with the second connecting rod, then the air duct body is connected with the air baffle, operation is easy, and all parts can be detached.

Description

Technical Field

[0001] This utility model relates to the field of preventing air leakage in civil engineering ventilation ducts, and in particular to a robust air leakage prevention device for civil engineering ventilation ducts. Background Technology

[0002] Civil engineering ventilation ducts are ventilation pipes built with sand and soil. The materials can be bricks, stones, or cement. There are often gaps at the joints of civil engineering ventilation ducts. In order to prevent air leakage, air leakage prevention devices are usually installed inside.

[0003] Existing technologies for preventing air leakage in civil engineering ventilation ducts often employ a device disclosed in CN215212124U, which uses a concrete layer, mortar layer, and fireproof layer that are all bonded together. One end of a reinforcing steel bar passes through the interior of the concrete layer, mortar layer, fireproof layer, and steel plate, extending to the exterior of the steel plate and forming a threaded connection with the reinforcing steel bar via a threaded cap. This makes the connection between the concrete layer, mortar layer, and fireproof layer more secure, preventing the duct body from collapsing and avoiding air leakage. However, this device uses multiple threaded caps to connect the baffle and the duct body, which not only results in a narrow interior space in the duct, affecting ventilation, but also makes loading and unloading cumbersome and reduces work efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of cumbersome installation procedures in the existing technology, and to propose a robust anti-leakage device for civil engineering ventilation ducts.

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

[0006] A robust air-leakage prevention device for civil engineering ventilation ducts includes a duct body, a baffle plate is provided inside the duct body, a rubber plate is installed on the outside of the baffle plate, a limit groove is opened at the bottom of the duct body, and a limiting mechanism for assisting in connecting the duct body is provided inside the baffle plate.

[0007] The upper end of the air duct body is provided with a threaded hole, and the baffle plate is provided with a fixing mechanism for fixing and connecting the air duct body.

[0008] Preferably, the limiting groove has a trapezoidal structure, and the outer side of the rubber plate is in contact with the inner wall of the air duct body.

[0009] Preferably, the limiting mechanism includes a support cylinder fixedly installed on the wind deflector, a pressing cylinder slidably installed inside the support cylinder, an abutting block welded inside the pressing cylinder, a support column welded to the wind deflector, a first connecting rod slidably installed inside the support column, a wedge block that abuts against the abutting block slidably installed inside the support column and the first connecting rod, a strong spring connecting the first connecting rod and the pressing cylinder, and a limiting block fixedly installed at the bottom end of the first connecting rod.

[0010] Preferably, the wedge has a Z-shaped structure, the pressing cylinder and the supporting cylinder are concentrically arranged, and the limiting block has a trapezoidal structure that fits the limiting groove.

[0011] Preferably, the fixing mechanism includes a base bolted to the wind deflector plate, the base having a toothed groove, a buckle bolted to the wind deflector plate, the buckle being slidably connected to a second connecting rod threadedly connected to the air duct body, and a limiting clamp movably connected to the second connecting rod and engaging with the base.

[0012] Preferably, the top end of the buckle is an inclined surface, the buckle is concentrically arranged with the base, and the bottom end of the limiting hoop is an inclined surface that cooperates with and abuts against the inclined surface of the buckle.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. By pressing down on the pressing cylinder, the limiting block will retract to the upper position of the rubber plate, and the wind baffle will be fitted into the air duct body until the limiting block is stuck in the limiting groove, which facilitates the next step of fixing and connecting the air duct body and the wind baffle.

[0015] 2. This utility model uses a rotating limiting clamp to retract the buckle inward, making it tightly connected with the second connecting rod, thereby connecting the air duct body and the baffle plate. The operation is simple, and all parts can be disassembled. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a robust anti-leakage device for civil engineering ventilation ducts proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the duct body structure of a robust, leak-proof air duct device for civil engineering proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the limiting mechanism structure of a robust anti-leakage device for civil engineering ventilation ducts proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the fixing mechanism of a robust anti-leakage device for civil engineering ventilation ducts proposed in this utility model.

[0020] In the diagram: 1. Air duct body; 2. Baffle plate; 3. Rubber plate; 4. Limiting groove; 5. Threaded hole; 6. Support cylinder; 7. Pressing cylinder; 8. Contact block; 9. Support column; 10. First connecting rod; 11. Wedge block; 12. Strong spring; 13. Limiting block; 14. Base; 15. Tooth groove; 16. Buckle; 17. Second connecting rod; 18. Limiting clamp. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A robust air-leakage prevention device for civil engineering ventilation ducts includes a duct body 1, with a baffle plate 2 installed inside the duct body 1. The duct body 1 is constructed of materials such as concrete and bricks, and has a large number of tiny pores, which can lead to air leakage. At the same time, its compressive strength is not high, and it may crack under great pressure. Therefore, it is necessary to install a sealing and compressive strength plate inside. A rubber plate 3 is installed on the outside of the baffle plate 2. The outside of the rubber plate 3 contacts the inner wall of the duct body 1, which can prevent air leakage inside the duct body 1. A limiting mechanism for assisting in connecting the duct body 1 is provided inside the baffle plate 2.

[0023] The upper end of the air duct body 1 is provided with a threaded hole 5, and the baffle plate 2 is provided with a fixing mechanism for fixing and connecting the air duct body 1.

[0024] The limiting mechanism includes a support cylinder 6 fixedly installed on the wind deflector 2, a pressing cylinder 7 slidably installed inside the support cylinder 6, the pressing cylinder 7 being concentrically arranged with the support cylinder 6, an abutting block 8 welded inside the pressing cylinder 7, a support column 9 welded to the wind deflector 2, a first connecting rod 10 slidably installed inside the support column 9, and a wedge block 11 slidably installed inside the support column 9 and the first connecting rod 10, abutting against the abutting block 8. The wedge block 11 has a Z-shaped structure, the groove opened inside the support column 9 is an inclined structure fitting the middle end of the wedge block 11, and the first connecting rod 10 has a rectangular through groove. A strong spring 12 connects the first connecting rod 10 and the pressing cylinder 7. It has good elastic recovery ability. When the external force disappears, it will return to its original state as quickly as possible. The bottom end of the first connecting rod 10 is fixedly installed with a limiting block 13. The wind baffle 2 is provided with enough space to accommodate the limiting block 13, so that the wind baffle 2 can be fitted into the air duct body 1. The limiting block 13 is a trapezoidal structure that fits the limiting groove 4. The bottom end of the air duct body 1 is provided with a limiting groove 4. The limiting groove 4 is a trapezoidal structure. There will inevitably be dimensional deviations between the limiting groove 4 and the limiting block 13. However, the trapezoidal structure adopted by the two can still be assembled when there are slight deviations, which can reduce the processing difficulty and thus improve production efficiency.

[0025] The fixing mechanism includes a base 14 bolted to the wind deflector 2. The base 14 has a toothed groove 15. A buckle 16 is bolted to the wind deflector 2. The buckle 16 is made of a material with good plasticity, so it will not break when pressed inward. The top of the buckle 16 is an inclined surface. The buckle 16 and the base 14 are concentrically arranged. The buckle 16 is slidably connected to a second connecting rod 17 threaded to the air duct body 1. A limiting clamp 18 that engages with the base 14 is movably connected to the second connecting rod 17. The bottom of the limiting clamp 18 is an inclined surface that abuts against the inclined surface of the buckle 16. The inner diameter of the limiting clamp 18 is slightly larger than the inner diameter of the buckle 16 to ensure that the limiting clamp 18 can apply pressure from the outside to the inside to the buckle 16.

[0026] The functional principle of this utility model can be explained through the following operation methods:

[0027] Press down on the pressing cylinder 7, and the wedge block 11 will slide to the left, causing the first connecting rod 10 to move upward. At this time, the limiting block 13 moves upward to the upper position of the rubber plate 3, and the wind baffle 2 is fitted into the air duct body 1. When the limiting block 13 moves to the upper part of the limiting groove 4, the strong spring 12 will restore its deformation, control the first connecting rod 10 to move downward, and fit it into the limiting groove 4 to limit the position of the wind baffle 2.

[0028] Twist the second connecting rod 17 into the threaded hole 5 through the buckle 16, and rotate the limiting clamp 18 clockwise. At this time, the limiting clamp 18 will move downward, pressing the upper end of the buckle 16 into the inside of the limiting clamp 18, so that it is in tight contact with the second connecting rod 17, thereby connecting the air duct body 1 and the wind baffle 2.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A firm type air leakage prevention device for a civil air duct, comprising an air duct body (1), characterized in that, The wind channel body (1) is provided with a wind baffle (2), the outer side of the wind baffle (2) is provided with a rubber plate (3), the bottom end of the wind channel body (1) is provided with a limiting groove (4), the wind baffle (2) is provided with a limiting mechanism for assisting in connecting the wind channel body (1); The limiting mechanism comprises a supporting cylinder (6) fixedly installed on the wind baffle (2), the supporting cylinder (6) is slidably installed with a pressing cylinder (7), the pressing cylinder (7) is welded with a resisting block (8), the wind baffle (2) is welded with a supporting column (9), the supporting column (9) is slidably installed with a first connecting rod (10), the supporting column (9) and the first connecting rod (10) are slidably installed with a wedge block (11) resisting the resisting block (8), the first connecting rod (10) and the pressing cylinder (7) are connected with a strong spring (12), the bottom end of the first connecting rod (10) is fixedly installed with a limiting block (13). The upper end of the wind channel body (1) is provided with a threaded hole (5), the wind baffle (2) is provided with a fixing mechanism for fixedly connecting the wind channel body (1), the fixing mechanism comprises a base (14) bolted on the wind baffle (2), the base (14) is provided with a tooth groove (15), the wind baffle (2) is bolted with a buckle (16), the buckle (16) is slidably connected with a second connecting rod (17) threadedly connected with the wind channel body (1), the second connecting rod (17) is movably connected with a limiting hoop (18) engaged with the base (14).

2. A secure type air leakage prevention device for a civil air duct according to claim 1, wherein The limiting groove (4) is a ladder-shaped structure, the outer side of the rubber plate (3) is in contact with the inner wall of the wind channel body (1).

3. A secure type air leakage prevention device for a civil air duct according to claim 1, wherein The wedge block (11) is a Z-shaped structure, the pressing cylinder (7) and the supporting cylinder (6) are concentrically arranged, the limiting block (13) is a ladder-shaped structure matched with the limiting groove (4).

4. A secure type air leakage prevention device for a civil air duct according to claim 1, wherein The top end of the buckle (16) is an inclined surface, the buckle (16) and the base (14) are concentrically arranged, the bottom end of the limiting hoop (18) is an inclined surface matched with the inclined surface of the buckle (16).

Images