Ventilation duct sealing device

Abstract

This utility model discloses a sealing device for ventilation ducts, relating to the field of ventilation duct technology. The utility model includes a first ventilation duct and a second ventilation duct. Both ventilation ducts are fitted with protective sleeves on their outer rings near one side. A long plate is symmetrically fixedly connected to the inner wall of one of the protective sleeves near its center, and a limiting hole is formed near the center of one side of the long plate. A protective sleeve is symmetrically fixedly connected to the outer ring of the other protective sleeve near its center. A shaft is slidably inserted into the outer ring of the other protective sleeve, located inside the center of the protective sleeve, and the shaft is adapted to the limiting hole. A pull plate is fixedly connected to the top of the shaft. By fitting the protective sleeves at the connection between ventilation ducts one and two, this utility model effectively prevents external dust and moisture from entering the connection, avoiding the need for frequent replacement of the sealing ring and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, specifically to a ventilation duct sealing device. Background Technology

[0002] Ventilation ducts are metal or composite pipes used in ventilation and air conditioning projects in industrial and civil buildings. They are a type of municipal infrastructure designed to circulate air and reduce the concentration of harmful gases.

[0003] In a Chinese patent with publication number CN214405058U entitled "A Sealing Structure for Ventilation Ducts", a plug is provided at one end of a ventilation duct and a slot is provided at the other end, so that two ventilation ducts can be quickly and tightly connected. A sealing gasket is provided between the two interlocking ventilation ducts to achieve a sealing effect, giving the ventilation ducts a good sealing effect.

[0004] However, this device still has shortcomings. When connecting two pipes, it only uses multiple sealing elements to complete the sealing work, thereby achieving the effect of sealing the connection. However, relying solely on sealing elements or sealing sheets to complete the sealing is easily corroded by rainwater or other conditions over a long period of time (pipes exposed to the external environment are easily affected by rainwater, and pipes located in sealed environments such as factory buildings are easily corroded), which can cause the sealing sheets to crack, leading to frequent leaks at the connection. Utility Model Content

[0005] To address the problem that relying solely on sealing elements or sealing sheets for sealing is susceptible to erosion from rain or other conditions over time, leading to cracking of the sealing sheets, the purpose of this invention is to provide a sealing device for ventilation ducts.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a ventilation duct sealing device, including a ventilation duct one and a ventilation duct two, both of which are fitted with protective sleeves on their outer rings near one side. One of the protective sleeves has a long plate symmetrically fixedly connected to its inner wall near the center, and a limiting hole is opened on the long plate near the center of one side. The other protective sleeve has a protective sleeve symmetrically fixedly connected to its outer ring near the center. The other protective sleeve has a shaft slidably inserted into its outer ring and inside the protective sleeve, and the shaft is adapted to the limiting hole. A pull plate is fixedly connected to the top of the shaft, and a spring is fixedly connected to the bottom of the pull plate and fitted onto the outer ring of the shaft, and the bottom of the spring is fixedly connected to the protective sleeve.

[0007] Preferably, one of the protective sleeves has a locking groove on its side end, and the other protective sleeve is fixedly connected to a limiting ring at the same level as the locking groove, and the limiting ring is adapted to the locking groove.

[0008] Preferably, the top of the protective sleeve is detachably provided with a top shell, and the outer ring of the ventilation duct one and ventilation duct two is provided with a truncated cone near the protective sleeve, and the side end of the truncated cone is fixedly connected to the protective sleeve.

[0009] Preferably, the ventilation duct has inner grooves on both sides, and sealing rings are provided on both sides of the ventilation duct at the inner grooves.

[0010] Preferably, a pull ring is fixedly connected to the center of the top of the pull plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. In this utility model, by placing a protective sleeve over the connection between ventilation duct one and ventilation duct two, external dust and moisture can be effectively prevented from entering the connection between ventilation duct one and ventilation duct two, avoiding the need for frequent replacement of the sealing ring and reducing maintenance costs.

[0013] 2. In this utility model, ventilation duct one and ventilation duct two are connected by two flanges and bolts. This connection method is simple and reliable, which can ensure a stable connection between ventilation ducts, effectively prevent gas leakage, and ensure the normal operation of the ventilation system. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the protective sleeve of this utility model.

[0017] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0019] In the diagram: 1. Ventilation duct one; 2. Ventilation duct two; 21. Inner groove; 22. Sealing ring; 3. Protective sleeve; 31. Locking groove; 32. Limiting ring; 33. Long plate; 34. Limiting hole; 35. Insert shaft; 36. Pull plate; 37. Spring; 38. Protective sleeve; 39. Top shell; 4. Frustum conical. Detailed Implementation

[0020] 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.

[0021] Example: Figure 1-4 As shown, this utility model provides a technical solution: a ventilation duct sealing device, including a ventilation duct 1 and a ventilation duct 2. Protective sleeves 3 are fitted around the outer rings of both ventilation ducts 1 and 2, near one side. The protective sleeves 3 are used to facilitate the use of bolts to limit the two flanges. Furthermore, stops are provided on the outer rings of ventilation ducts 2 and 1 near the flanges to limit the final position of the protective sleeves 3. The protective sleeves 3 provide secondary protection for ventilation ducts 1 and 2. A long plate 33 is symmetrically fixedly connected to the inner wall of one of the protective sleeves 3 near the center. The long plate 33 is used to... To facilitate the use of the insert shaft 35 to limit the movement of the two protective sleeves 3, a limiting hole 34 is provided near the center of one side of the long plate 33. A protective sleeve 38 is symmetrically fixedly connected to the outer ring of the other protective sleeve 3 near the center. The protective sleeve 38 is provided to protect the internal components and extend their service life. An insert shaft 35 is slidably inserted into the outer ring of the other protective sleeve 3 and located inside the center of the protective sleeve 38. The insert shaft 35 is adapted to the limiting hole 34. A pull plate 36 is fixedly connected to the top of the insert shaft 35. A spring 37 is fixedly connected to the bottom of the pull plate 36 and fitted onto the outer ring of the insert shaft 35. The bottom of the spring 37 is fixedly connected to the protective sleeve 3.

[0022] One of the protective sleeves 3 has a locking groove 31 on one side.

[0023] By adopting the above technical solution, a locking groove 31 is opened on the side end of the protective sleeve 3 to cooperate with the limiting ring 32 to realize the limiting function of the two protective sleeves 3.

[0024] Another protective sleeve 3 has a limit ring 32 fixedly connected at the same level as the locking groove 31 on one side, and the limit ring 32 is adapted to the locking groove 31.

[0025] By adopting the above technical solution, the limiting ring 32 is set to work in conjunction with the locking groove 31, so as to achieve the effect of limiting the two protective sleeves 3.

[0026] The protective cover 38 has a detachable top shell 39 at its top.

[0027] By adopting the above technical solution, a top shell 39 is set at the top of the protective sleeve 38 in order to inspect and operate the internal components.

[0028] A truncated cone 4 is fitted around the outer ring of ventilation duct 1 and ventilation duct 2 near the protective sleeve 3, and the side end of the truncated cone 4 is fixedly connected to the protective sleeve 3.

[0029] By adopting the above technical solution, symmetrical cones 4 are set on both sides of ventilation duct 1 and ventilation duct 2 to disperse dust and other substances on the protective sleeve 3.

[0030] The ventilation duct 2 has an inner groove 21 on one side.

[0031] By adopting the above technical solution, an inner groove 21 is opened at the side end of the ventilation duct 2 to facilitate the placement of the sealing ring 22.

[0032] A sealing ring 22 is installed on the side end of the ventilation duct 2 and located in the inner groove 21.

[0033] By adopting the above technical solution, a sealing ring 22 is set inside the inner groove 21 on the side end of the ventilation duct 2 in order to improve the sealing performance of the duct during use.

[0034] A pull ring is fixedly connected at the center of the top of the pull plate 36.

[0035] By adopting the above technical solution, a pull ring is set at the top of the pull plate 36 to facilitate the lifting of the pull plate 36.

[0036] Working principle: When using this device, first place the sealing ring 22 inside the inner groove 21, then connect ventilation duct 1 and ventilation duct 2, and complete the connection between ventilation duct 1 and ventilation duct 2 by using two flanges and bolts.

[0037] Then, slide the two protective sleeves 3 (when the protective sleeves 3 move, the two pull plates 36 need to be pulled up and down) so that they can be moved to the stop. After moving to the stop, the limiting ring 32 will be locked inside the locking groove 31, and the limiting hole 34 will be below the insertion shaft 35. Then, release the force on the two pull plates 36, so that the spring 37 drives the insertion shaft 35 to move downward and lock it inside the limiting hole 34, thus completing the limiting work of the two protective sleeves 3. Finally, cover the top shell 39 on the protective sleeve 38 to complete the effect of protecting the internal components.

[0038] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A ventilation duct sealing device, comprising a first ventilation duct (1) and a second ventilation duct (2), characterized in that: The outer ring of ventilation duct one (1) and ventilation duct two (2) are both fitted with protective sleeves (3) near one side. One of the protective sleeves (3) has a long plate (33) symmetrically fixedly connected to the inner wall near the center. The long plate (33) has a limit hole (34) near the center of one side. Another protective sleeve (3) is symmetrically fixedly connected to a protective sleeve (38) near the center of the outer ring. Another protective sleeve (3) is slidably inserted with a shaft (35) at the center of the outer ring of the protective sleeve (38). The shaft (35) is adapted to the limiting hole (34). A pull plate (36) is fixedly connected to the top of the shaft (35). The shaft (35) is sleeved on the bottom of the pull plate (36) and a spring (37) is fixedly connected to the outer ring. The bottom of the spring (37) is fixedly connected to the protective sleeve (3).

2. The ventilation duct sealing device as described in claim 1, characterized in that, One of the protective sleeves (3) has a locking groove (31) on its side end.

3. The ventilation duct sealing device as described in claim 2, characterized in that, Another protective sleeve (3) is fixedly connected to a limiting ring (32) at the same level as the locking groove (31), and the limiting ring (32) is adapted to the locking groove (31).

4. The ventilation duct sealing device as described in claim 1, characterized in that, The protective sleeve (38) has a detachable top shell (39) at its top.

5. The ventilation duct sealing device as described in claim 1, characterized in that, A truncated cone (4) is fitted around the outer ring of ventilation duct one (1) and ventilation duct two (2) near the protective sleeve (3), and the side end of the truncated cone (4) is fixedly connected to the protective sleeve (3).

6. The ventilation duct sealing device as described in claim 1, characterized in that, The ventilation duct 2 (2) has an inner groove (21) on its side end.

7. The ventilation duct sealing device as described in claim 6, characterized in that, A sealing ring (22) is provided on the side end of the ventilation duct (2) and at the inner groove (21).

8. The ventilation duct sealing device as described in claim 1, characterized in that, A pull ring is fixedly connected to the center of the top of the pull plate (36).

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