Square multi-leaf regulating valve

Abstract

The utility model relates to a square multi-leaf regulating valve, which comprises a valve body, valve leaves, an opening and closing actuating mechanism and a linkage. The valve leaves are installed on the inner side of the valve body, and the valve stems are installed at the center of the valve leaves. One end of the valve stems passes through the bearing on the outer side of the valve body. The opening and closing actuating mechanism installed on the valve seat of the side of the valve body is connected to one end of one of the valve stems. The linkage is connected between the other ends of the valve stems. The valve body on the outer side of the linkage is covered with a cover plate. There are no bolts on the valve leaves and valve stems on the inner side of the valve body. The bolts do not enter the internal ventilation area, which can avoid the risk of bolt falling off in the prior art and reduce the safety hazard. The utility model has the following advantages: the structure is reasonably designed, there are no bolts in the valve, which can effectively reduce the safety hazard; the valve leaves are in the shape of rhombic blades, which have the characteristic of small pressure drop and can effectively reduce the system energy consumption; the blades are lapped and extruded to seal, which has good sealing performance and further reduces the system energy consumption; and the valve has detachability and can be installed in various situations.

Description

Technical Field

[0001] This utility model relates to a square multi-leaf regulating valve, belonging to the field of multi-leaf valve technology. Background Technology

[0002] Square multi-leaf regulating valves are used in industries such as semiconductors, LCD panels, biomedicine, and data centers, mainly for regulating the airflow of ventilation and exhaust systems.

[0003] Existing square multi-leaf control valves generally have the following problems:

[0004] 1) The valve contains bolts and fasteners. During operation, the bolts may loosen due to vibration. If they fall into the ventilation and exhaust system, they will cause the valve to shut down, with serious consequences and a significant safety hazard.

[0005] 2) Using conventional blades, the airflow passing through the valve will cause a large pressure drop, resulting in high system energy consumption;

[0006] 3) The valve's internal sealing is generally poor, resulting in pressure imbalance and increased energy consumption;

[0007] 4) It is not detachable and is not suitable for areas with limited space. Utility Model Content

[0008] The present invention proposes a square multi-leaf regulating valve, the purpose of which is to overcome the above-mentioned shortcomings of the prior art, reduce safety hazards, reduce energy consumption, and improve applicability.

[0009] The technical solution of this utility model is as follows: A square multi-leaf regulating valve, the structure of which includes a valve body, valve leaves, an opening and closing actuator, and a linkage. Several valve leaves are installed inside the valve body, and a valve stem is installed at the center of the valve leaves. One end of the valve stem passes through a bearing on the outer side of the valve body. The opening and closing actuator, mounted on a valve seat on the side of the valve body, drives and connects one end of one valve stem. The remaining valve stem ends are connected by a linkage. A cover plate is provided on the valve body outside the linkage. There are no bolts on the valve leaves and valve stem inside the valve body. Bolts do not enter the internal ventilation area, avoiding the risk of bolts falling off in existing technologies and reducing safety hazards.

[0010] Preferably, the valve leaf has a rhomboid cross-section, with J-shaped bends at both the upper and lower ends, and a figure-9 shaped sealing strip inside each bend. When the valve leaf is closed, the bends of adjacent valve leaves overlap and compress the sealing strip, ensuring a good sealing effect.

[0011] Preferably, in cases other than single-zone configurations, the valve body is divided into several valve units by a partition frame. Each valve unit has a valve leaf with a corresponding opening / closing actuator. The other end of the valve stem extends into the partition frame and is fitted with a bushing. A bushing is provided at the other end of the valve stem inside the bushing. An inner baffle is welded to the valve body adjacent to one end of the valve leaf. Gaskets are pressed and sealed between both ends of the valve leaf and the partition frame and inner baffle, respectively. The gaskets are placed in grooves on the corresponding partition frame and inner baffle to prevent them from sliding in other directions. Both the valve body and the partition frame are made of PTFE expanded plates assembled with titanium bolts. With no bolts on the valve leaf and valve stem inside the valve body, bolts can be prevented from entering the internal ventilation area while ensuring structural stability.

[0012] Preferably, the valve stem has a shaft end sleeve on the side of the bearing away from the linkage component, and an oil seal is provided inside the shaft end sleeve near the bearing. A pair of spaced-apart rubber rings are provided on one side of the oil seal inside the shaft end sleeve. This double rubber ring and oil seal design achieves multiple seals at the valve stem end, with the bearing providing positioning and support.

[0013] The advantages of this utility model are: reasonable structural design, no bolts inside the valve, which can effectively reduce safety hazards; the valve blade adopts a diamond-shaped blade, which has the characteristics of low pressure drop, which can effectively reduce system energy consumption; the blade overlaps and squeezes to seal, and the blade and valve body squeeze PTFE seal, which has a multi-seal structure, has good sealing performance, and further reduces system energy consumption; it is detachable and can be used for installation in a variety of situations. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the square multi-leaf regulating valve of this utility model.

[0015] Figure 2 yes Figure 1 BB-direction sectional view.

[0016] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle valve leaf.

[0017] Figure 4 yes Figure 1 A perspective view of the valve leaf.

[0018] In the diagram, 1 is the valve body, 11 is the inner baffle, 2 is the valve leaf, 21 is the bushing, 22 is the rubber ring, 23 is the oil seal, 24 is the valve stem, 25 is the sealing strip, 3 is the partition frame, 4 is the cover plate, 5 is the opening and closing actuator, 6 is the valve seat, 7 is the bushing, 8 is the gasket, 9 is the bearing, and 10 is the linkage component. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0020] like Figure 1-4 As shown, a square multi-leaf regulating valve includes a valve body 1, valve leaves 2, an opening / closing actuator 5, and a linkage 10. Several valve leaves 2 are installed inside the valve body 1. The valve leaves 2 have a rhomboid cross-section. A valve stem 24 is installed at the center of each valve leaf 2. One end of the valve stem 24 passes through a bearing 9 on the outer surface of the valve body 1. The opening / closing actuator 5, mounted on a valve seat 6 on the side of the valve body 1, drives one end of one valve stem 24. The remaining valve stems 24 are connected to each other via the linkage 10. A cover plate 4 is provided on the valve body 1 outside the linkage 10. There are no bolts on the valve leaves 2 and valve stems 24 inside the valve body 1. The bolts do not enter the internal ventilation area, avoiding the risk of bolts falling off in existing technologies and reducing safety hazards.

[0021] Depending on the valve specifications, single-zone, double-zone, and four-zone configurations can be established. In cases other than single-zone, the valve body 1 is divided into several valve units by a partition frame 3. Each valve unit contains a valve leaf 2 with a corresponding opening / closing actuator 5. The end of the partition frame 3 is bolted to the valve body 1. The other end of the valve stem 24 extends into the partition frame 3 and is fitted with a bushing 21. A bushing 7 is provided at the other end of the valve stem 24 inside the bushing 21. An inner baffle 11 is welded to the inside of the valve body 1 adjacent to one end of the valve leaf 2. Gaskets 8 are pressed and sealed between both ends of the valve leaf 2 and the partition frame 3 and inner baffle 11, respectively. The gaskets 8 are positioned within grooves on the corresponding partition frame 3 and inner baffle 11. These grooves are formed by bending with a differential die to prevent the gaskets 8 from sliding in other directions. The gaskets 8 are preferably PTFE gaskets, and the bushings 21 are preferably PTFE bushings. Both the valve body 1 and the partition frame 3 are preferably assembled from PTFE expanded plates using titanium bolts. Since there are no bolts on the valve leaf 2 and valve stem 24 inside the valve body 1, the bolts can be prevented from entering the internal ventilation area while ensuring structural stability.

[0022] A shaft end sleeve is provided on the side of the valve stem 24 away from the linkage 10, near the bearing 9. An oil seal 23 is provided inside the shaft end sleeve near the bearing 9. A pair of spaced rubber rings 22 are provided on one side of the oil seal 23 inside the shaft end sleeve. The rubber rings 22 are preferably fluororubber rings. The structural design of the double fluororubber rings and the oil seal 23 achieves multiple seals at the end of the valve stem 24 shaft, and is limited and supported by the bearing 9.

[0023] The upper and lower ends of valve leaf 2 are respectively provided with J-shaped bends that match the shape. A "9"-shaped sealing strip 25 is provided inside the bend. When valve leaf 2 is closed, the bends of adjacent valve leaf 2 overlap and squeeze the sealing strip 25, which can ensure a good closing and sealing effect.

[0024] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A square multi-leaf regulating valve, characterized in that, The valve body (1), valve leaf (2), opening and closing actuator (5) and linkage (10) are included. Several valve leaves (2) are installed inside the valve body (1). A valve stem (24) is installed in the center of the valve leaf (2). One end of the valve stem (24) passes through the bearing (9) on the outer side of the valve body (1). The opening and closing actuator (5) installed on the valve seat (6) on the side of the valve body (1) drives and connects one end of one valve stem (24). The other valve stems (24) are connected to each other by a linkage (10). A cover plate (4) is provided on the valve body (1) outside the linkage (10). There are no bolts on the valve leaf (2) and valve stem (24) inside the valve body (1).

2. The square multi-leaf regulating valve as described in claim 1, characterized in that, The valve leaf (2) has a rhomboid cross section. The upper and lower ends of the valve leaf (2) are respectively provided with J-shaped bends that match the shape. A "9" shaped sealing strip (25) is provided inside the bend. When the valve leaf (2) is closed, the adjacent valve leaves (2) bend and overlap and squeeze the sealing strip (25).

3. A square multi-leaf regulating valve as described in claim 1, characterized in that, The valve body (1) is divided into several valve units by a partition frame (3) on the inside. Each valve unit has a valve leaf (2) with a corresponding opening and closing actuator (5). The other end of the valve stem (24) extends into the partition frame (3) and is fitted with a bushing (21). The other end of the valve stem (24) inside the bushing (21) is fitted with a bushing (7). An inner baffle (11) is welded to the inside of the valve body (1) adjacent to one end of the valve leaf (2). Gaskets (8) are squeezed and sealed between the two ends of the valve leaf (2) and the partition frame (3) and the inner baffle (11). The gaskets (8) are set in the slots on the corresponding partition frame (3) and the inner baffle (11). The valve body (1) and the partition frame (3) are both made of PTFE expanded plates assembled by titanium bolts.

4. A square multi-leaf regulating valve as described in claim 1, characterized in that, The valve stem (24) has a bearing (9) on the side away from the linkage (10) with a shaft end sleeve. An oil seal (23) is provided inside the shaft end sleeve near the bearing (9). A pair of spaced rubber rings (22) are provided on one side of the oil seal (23) inside the shaft end sleeve.

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