Novel venturi valve

Abstract

According to the novel venturi valve, the valve rod has the limiting function, the moving stroke of the valve rod can be limited, the adjusting range of constant air volume is guaranteed, meanwhile, the sealing performance is good, and the normal using effect is guaranteed. The valve comprises a valve body, a valve rod and a valve cone, an upper supporting frame and a lower supporting frame are arranged in the valve body, the valve rod penetrates through the upper supporting frame and the lower supporting frame to be connected in a sliding mode, the valve cone is arranged outside the valve rod in a sleeving mode, and the upper end of the valve rod is connected with one end of a swing rod through a rotationally-connected U-shaped connecting rod. The other end of the swing rod extends out of the side wall of the valve body and is fixedly connected with one end of the positioning rod, a sealing mechanism is arranged at the connecting position of the swing rod and the valve body, an L-shaped installation base is arranged outside the side wall of the valve body, an arc-shaped limiting groove is formed in the installation base, the other end of the positioning rod extends out of the arc-shaped limiting groove, and a locking bolt is arranged at the end of the positioning rod.

Description

Technical Field

[0001] The utility model relates to the technical field of Venturi valves, in particular to a novel Venturi valve. Background Art

[0002] A Venturi valve is a valve used to regulate air flow, commonly found in HVAC systems. It can adjust the air flow by changing the opening area inside the valve. Existing Venturi valves, such as the servo-driven variable air volume Venturi valve disclosed in the Chinese utility model patent application No. 202221895039.0, include a valve body, a valve stem, and a valve cone. The valve stem, driven by the air volume adjustment mechanism, drives the valve cone to move linearly inside the valve body through the valve stem. The valve core can generate different air volumes depending on the stop position. However, in actual use, for a constant air volume Venturi valve, due to the lack of a limit mechanism on the valve stem, it is difficult to determine the constant air volume adjustment range, which increases the difficulty of air volume adjustment. At the same time, the connecting rod connected to the valve stem is provided with a rotating bearing at the connection with the valve body, and the sealing of the connection is difficult to ensure. Utility Model Content

[0003] In view of the problem that in the actual use of the existing Venturi valve, it is difficult to determine the constant air volume adjustment range due to the lack of a limiting mechanism, which increases the difficulty of air volume adjustment; at the same time, the overall sealing is difficult to ensure. The utility model provides a new Venturi valve, whose valve stem has a limiting function, which can limit the stroke of the valve stem movement and ensure the adjustment range of the constant air volume. At the same time, it has good sealing performance to ensure normal use.

[0004] The technical solution is as follows: a new type of Venturi valve, which includes a valve body, a valve stem and a valve cone, an upper support frame and a lower support frame are provided inside the valve body, the valve stem passes through the upper support frame and the lower support frame for sliding connection, and the valve cone is sleeved on the outside of the valve stem, and is characterized in that: the upper end of the valve stem is connected to one end of the swing rod through a rotatably connected "凵"-shaped connecting rod, the other end of the swing rod extends from the side wall of the valve body and is fixedly connected to one end of the positioning rod, a sealing mechanism is provided at the connection between the swing rod and the valve body, an "L"-shaped mounting seat is provided on the outside of the side wall of the valve body, an arc-shaped limiting groove is provided on the mounting seat, the other end of the positioning rod extends from the arc-shaped limiting groove, and a locking bolt is provided at its end.

[0005] It is further characterized in that: the sealing mechanism includes a sealing seat, a matching sealing block is provided inside the sealing seat, the swing rod passes through the sealing block and is connected to the swing rod through a connecting piece, and the gap between the sealing block and the sealing seat is filled and sealed by lubricating oil.

[0006] After adopting the above structure, the swing rod drives the valve rod to move linearly in the radial direction along the inside of the valve body through the connecting rod. Since the swing rod is also connected to the positioning rod, and the positioning rod is limited by the arc-shaped limiting groove on the mounting seat, the moving stroke of the valve rod can be restricted, thereby determining the adjustment range of the constant air volume. At the same time, a sealing mechanism is provided at the connection between the swing rod and the valve body to ensure sealing and normal use effect. Brief Description of the Drawings

[0007] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0008] Figure 2 Schematic diagram of the overall structure of the present utility model in another direction;

[0009] Figure 3 Front view of the overall structure of the present utility model;

[0010] Figure 4 Cross-sectional view of the overall structure of the present utility model;

[0011] Figure 5 Cross-sectional view of the partial structure of the present utility model. Detailed Description of the Preferred Embodiment

[0012] As Figures 1 to 5 described, a new type of Venturi valve includes a valve body 1, a valve rod 2 and a valve cone 3. An upper support frame 4 and a lower support frame 5 are provided inside the valve body 1. The valve rod 2 is arranged at the central axis of the valve body 1 and passes through the middle parts of the upper support frame 4 and the lower support frame 5 and is slidably connected. The valve cone 3 is sleeved outside the valve rod 2, and the valve rod 2 drives the valve cone 3 to move linearly inside the valve body 1 to adjust the air volume of the valve body 1. The upper end of the valve rod 2 is rotatably connected to one end of a "U"-shaped connecting rod 6 through a rotating shaft, and the other end of the "U"-shaped connecting rod 6 is rotatably connected to one end of a swing rod 7 through a rotating shaft. The other end of the swing rod 7 extends out from the side wall of the valve body 1 and is fixedly connected to one end of a positioning rod 8 through a bolt. A sealing mechanism is provided at the connection between the swing rod 7 and the valve body 1 to ensure sealing. Specifically, the sealing mechanism includes a sealing seat 9, and a matching sealing block 10 is provided inside the sealing seat 9. The swing rod 7 passes through the sealing block 10, and the gap between the sealing block 10 and the sealing seat 9 is filled and sealed with lubricating oil. Traditionally, a silicone rubber sleeve is generally used for sealing at the connection between the swing rod 7 and the valve body 1. However, because it needs to be repeatedly pulled and stretched during the movement process, there are high requirements for the structure, material and processing of the silicone rubber sleeve. Moreover, in order to ensure good stretching effect, it is impossible to achieve a good balance among the thickness, wrapping property and aging of the silicone rubber sleeve. The thicker the silicone rubber sleeve, the less conducive it is to stretching and sealing, and the thinner it is, the more difficult it is to ensure strength and sealing durability. By setting the sealing mechanism adopted by the present utility model, not only can the sealing performance of the valve body 1 be ensured, the sealing effect can be optimized, but also the reliability of the structure can be enhanced, the structure design can be simplified, and the processing difficulty of the sealing parts can be reduced.

[0013] An "L"-shaped mounting seat 11 is provided on the outer side of the side wall of the valve body 1. An arc-shaped limiting groove is provided on the mounting seat 11. The other end of the positioning rod 8 extends out from the arc-shaped limiting groove, and a locking bolt 12 is provided at its end. By rotating the positioning rod 8 along the arc-shaped limiting groove and finally locking it through the locking bolt 12, one end of the swing rod 7 is driven to move up and down. The swing rod 7 drives the valve stem 2 and the valve cone 3 thereon to perform linear movement along the radial direction of the valve body 1, so that the air volume inside the valve body 1 can be adjusted. Since the swing rod 7 is restricted by the positioning rod 8 and the arc-shaped limiting groove, the movement stroke of the valve stem 2 is controllable, avoiding its excessive movement, so that the air volume adjustment range of the constant air volume of this venturi valve can be determined, the adjustment is convenient, and the working effect of the venturi valve of the present invention during actual use is ensured.

[0014] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those familiar with the technology within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A novel Venturi valve, which comprises a valve body, a valve stem and a valve cone. An upper support frame and a lower support frame are arranged inside the valve body. The valve stem passes through the upper support frame and the lower support frame and is slidably connected. The valve cone is sleeved outside the valve stem, and is characterized in that: The upper end of the valve stem is connected to one end of a swing rod through a rotatably connected "U"-shaped connecting rod. The other end of the swing rod extends out from the side wall of the valve body and is fixedly connected to one end of a positioning rod. A sealing mechanism is provided at the connection between the swing rod and the valve body. An "L"-shaped mounting seat is provided outside the side wall of the valve body, and an arc-shaped limiting groove is provided on the mounting seat. The other end of the positioning rod extends out from the arc-shaped limiting groove, and a locking bolt is provided at its end.

2. The novel Venturi valve according to claim 1, wherein: The sealing mechanism includes a sealing seat. A matching sealing block is provided inside the sealing seat. The swing rod passes through the sealing block and is connected to the sealing block through a connecting piece. The gap between the sealing block and the sealing seat is filled and sealed with lubricating oil.

Images