Locking mechanism for a flue valve

Abstract

The utility model discloses a locking mechanism of smoke exhaust pipeline valve, including ring groove seat, ring groove seat installs on the valve body, and ring groove seat center rotation connects valve shaft top, and valve shaft bottom is rotationally connected with the valve body inner bottom surface, and the valve shaft axle body is equipped with the valve piece that cooperates with the valve body inner chamber, and the valve shaft top end connects the rotary arm, and the rotary arm top surface groove way inlays the elbow arm, and the elbow arm head is equipped with the positioning pin, and the positioning pin bottom end passes through the rotary arm bottom surface waist hole and cooperates with the ring groove seat's toothing groove, and the elbow arm inflection point is hinged with the rotary arm through the pin shaft, and the pin shaft axle body has the torsional spring in series, and the torsional spring upper and lower two prongs respectively with elbow arm and rotary arm contact, this mechanism is through the cooperation of positioning pin and ring groove seat's locking the valve's opening degree, when torsional spring natural stretch and lift elbow arm, the pin shaft is inserted into the toothing groove and restricts the valve shaft rotation, when elbow arm is pressed down by the person, the pin shaft is lifted and releases the toothing groove, and can rotate the rotary arm and adjust the valve piece opening degree, and the mechanism simple structure, convenient operation can lock the valve piece fast.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, specifically to a locking mechanism for a smoke exhaust pipe valve. Background Technology

[0002] Smoke exhaust duct valves are critical control devices installed in ventilation or smoke exhaust systems. Their main function is to automatically or manually cut off airflow to the fire area during a fire, preventing toxic smoke and flames from spreading to other non-fire areas through the ducts, thus buying valuable time for evacuation and fire rescue. They typically consist of a valve body, valve plate, and control device, possessing fireproof, smoke-proof, and flow-control characteristics. They are an indispensable and vital facility in building fire protection systems, directly related to the safety of life and property. To balance system airflow and ensure effective smoke exhaust, smoke exhaust duct valves usually have multiple opening degrees, which can be set according to actual needs. When the smoke flow is large, the valve plate is often pushed, changing the opening degree. This can cause abnormal noise or, in severe cases, affect the smoke exhaust effect, requiring a locking mechanism to solve these problems. Utility Model Content

[0003] To solve the above problems, this utility model proposes a locking mechanism for a flue gas duct valve, including an annular groove seat, which is installed on the valve body. The center of the annular groove seat is rotatably connected to the top of the valve shaft, and the bottom of the valve shaft is rotatably connected to the bottom surface of the valve body. The valve shaft is provided with a valve plate that mates with the inner cavity of the valve body. A rotating arm is connected to the top of the valve shaft. A bent arm is embedded in a groove on the top surface of the rotating arm. A positioning pin is provided at the head of the bent arm. The bottom end of the positioning pin passes through a waist hole on the bottom surface of the rotating arm and mates with the tooth groove of the annular groove seat. The bending point of the bent arm is hinged to the rotating arm by a pin. A torsion spring is threaded through the pin shaft, and the upper and lower legs of the torsion spring contact the bent arm and the rotating arm, respectively.

[0004] Furthermore, the valve shaft has an external spline at the top, which is inserted into the internal spline at the center of the rotating arm head. A limit bolt is threaded into the center screw hole on the top surface of the valve shaft, and a limit nut is threaded into the bottom threaded section of the valve shaft after it passes through the bottom surface of the valve body.

[0005] Furthermore, the valve shaft is rotatably connected to the central cylinder of the ring groove seat, and the top of the cylinder is fitted with the mating plate and the head of the rotating arm. A scale is provided around the top surface of the mating plate, and the scale of the scale corresponds to the tooth groove and the pointer of the rotating arm head.

[0006] Furthermore, the locating pin is threaded to the through hole seat at the head of the bent arm. Several washers are provided between the head of the locating pin and the top surface of the through hole seat. After the pin passes through the through hole at the side plate of the bent arm and the rotating arm, it is locked by a nut.

[0007] Furthermore, the valve body is either circular or rectangular in shape, with flanges at both ends and a bent seat welded to the top of the valve body. The bent seat is connected to the bottom plate of the annular groove seat by bolts.

[0008] The beneficial effects of this utility model are as follows: This utility model locks the valve opening by cooperating with the positioning pin and the ring groove seat. When the torsion spring naturally extends and lifts the bent arm, the pin is engaged in the tooth groove to restrict the rotation of the valve shaft. When the bent arm is manually pressed down, the pin lifts up and releases the tooth groove, and the rotating arm can be rotated to adjust the valve plate opening. The valve plate position can be determined by the scale during adjustment. It has the characteristics of simple structure and convenient operation, and can quickly lock the valve plate to the target position, effectively avoiding the influence of flue gas flow on the valve plate. Attached Figure Description

[0009] Figure 1 This is a front view sectional view of the present invention; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a cross-sectional view of the structure of the bending arm when it is pressed down in this utility model.

[0010] The reference numerals in the attached drawings are explained as follows: 1. Ring groove seat; 101. Gear groove; 102. Cylinder body; 103. Dial; 2. Valve body; 201. Flange; 202. Bending seat; 3. Valve shaft; 301. Valve plate; 302. External spline; 4. Rotating arm; 401. Waist hole; 402. Pointer; 5. Bending arm; 501. Through hole seat; 6. Locating pin; 7. Pin shaft; 8. Torsion spring; 9. Limit bolt; 10. Limit nut; 11. Washer. Detailed Implementation

[0011] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0012] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0013] The present invention will be further described below with reference to the accompanying drawings: like Figures 1 to 3 As shown, a locking mechanism for a flue gas duct valve includes an annular groove seat 1. The annular groove seat 1 has a plurality of teeth 101 evenly arranged around its perimeter (usually one every 15°). The bottom plate of the annular groove seat 1 is bolted to a bending seat 202 of the valve body 2. The bending seat 202 is welded to the top of the valve body 2. The valve body 2 is either circular or rectangular in shape, and flanges 201 are provided at both ends of the valve body 2. The central cylinder 102 of the annular groove seat 1 is rotatably connected to the top of the valve shaft 3. The threaded section at the bottom of the valve shaft 3 passes through the inner bottom surface of the valve body 2 and is threadedly connected to a limiting nut 10. After the limiting nut 10 is screwed to an appropriate tightness position, it is welded to the valve shaft 3 to form a whole. During welding, it must be ensured that the valve shaft 3 can rotate normally.

[0014] In this embodiment, the valve shaft 3 has a valve plate 301 that mates with the inner cavity of the valve body 2. The top of the valve shaft 3 has an external spline 302, which is inserted into the internal spline at the center of the head of the rotating arm 4. A limiting bolt 9 is threaded into the center threaded hole on the top surface of the valve shaft 3. The head of the rotating arm 4 is fitted with a mating plate at the top of the cylinder 102. A scale 103 is circumferentially arranged on the top surface of the mating plate. The scale of the scale 103 corresponds to the toothed groove 101 and the pointer 402 on the head of the rotating arm 4. A bent arm 5 is embedded in the groove on the top surface of the rotating arm 4. A positioning pin 6 is threadedly connected to the through hole seat 501 at the head of the bent arm 5. Several gaskets 11 are provided between the head of the positioning pin 6 and the top surface of the through hole seat 501. The bottom end of the positioning pin 6 passes through the waist hole 401 on the bottom surface of the rotating arm 4 and mates with the toothed groove 101 of the ring groove seat 1.

[0015] In this embodiment, the bending arm 5 is hinged to the rotating arm 4 at its bending point via a pin 7. The pin 7 passes through a through hole in the side plate of both the bending arm 5 and the rotating arm 4 and is locked by a nut. A torsion spring 8 is threaded onto the shaft of the pin 7, with its upper and lower legs contacting the bending arm 5 and the rotating arm 4 respectively. When the torsion spring 8 is naturally extended, the bending arm 5 is supported by its legs, and at this time, the positioning pin 6 is vertically inserted into the toothed groove 101 for locking. When the torsion spring 8 is pressed down, the positioning pin 6 tilts up around the pin 7 to release the toothed groove 101, at which time the rotating arm 4 can drive the valve shaft 3 to rotate for adjustment.

[0016] The working principle of this utility model is as follows: The valve body 2 is installed into the exhaust pipe via flange 201. When the opening of the valve plate 301 needs to be adjusted, the bending arm 5 is pressed down against the spring force of the torsion spring 8. The positioning pin 6, which was originally embedded in the toothed groove 101, is lifted around the pin shaft 7 and eventually completely disengages from the limit of the toothed groove 101. While keeping the bending arm 5 pressed down, the rotating arm 4 is rotated. According to the indication of the pointer 402 and the scale 103, the valve plate 301 is rotated to the target opening. Then, the bending arm 5 is released, and the bending arm 5 returns to its original position under the spring force of the torsion spring 8. The positioning pin 6 is re-embedded in the corresponding toothed groove 101 to complete the locking. When the flue gas in the exhaust pipe puts pressure on the valve plate 301, the positioning pin 6 can prevent the valve shaft 3 from rotating under the limit of the toothed groove 101, thereby ensuring the stability of the valve opening. This utility model has a simple structure and is easy to operate. It can quickly lock the valve plate 301 to the target position and effectively avoid the influence of flue gas flow on the valve plate 301.

[0017] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A locking mechanism for a flue gas duct valve, comprising an annular groove seat (1), characterized in that: The annular groove seat (1) is installed on the valve body (2). The center of the annular groove seat (1) is rotatably connected to the top of the valve shaft (3). The bottom of the valve shaft (3) is rotatably connected to the inner bottom surface of the valve body (2). The valve shaft (3) is provided with a valve plate (301) that cooperates with the inner cavity of the valve body (2). The top of the valve shaft (3) is connected to a rotating arm (4). A bent arm (5) is embedded in the groove on the top surface of the rotating arm (4). A positioning pin (6) is provided at the head of the bent arm (5). The bottom end of the positioning pin (6) passes through the waist hole (401) on the bottom surface of the rotating arm (4) and cooperates with the tooth groove (101) of the annular groove seat (1). The bending point of the bent arm (5) is hinged to the rotating arm (4) through a pin (7). A torsion spring (8) is threaded through the shaft of the pin (7). The upper and lower legs of the torsion spring (8) are in contact with the bent arm (5) and the rotating arm (4) respectively.

2. The locking mechanism for a smoke exhaust pipe valve according to claim 1, characterized in that: The valve shaft (3) is provided with an external spline (302) at the top. The external spline (302) is inserted into the internal spline at the center of the head of the rotating arm (4). The valve shaft (3) is connected to the limit bolt (9) by the threaded hole at the center of the top surface. The bottom threaded section of the valve shaft (3) passes through the inner bottom surface of the valve body (2) and is connected to the limit nut (10) by the thread.

3. The locking mechanism for a smoke exhaust pipe valve according to claim 1, characterized in that: The valve shaft (3) is rotatably connected to the central cylinder (102) of the ring groove seat (1) at the top. The top of the cylinder (102) is fitted with the head of the rotating arm (4). The top surface of the mating plate is surrounded by a scale (103). The scale of the scale (103) corresponds to the tooth groove (101) and the pointer (402) at the head of the rotating arm (4).

4. The locking mechanism for a smoke exhaust duct valve according to claim 1, characterized in that: The positioning pin (6) is threaded to the through hole seat (501) at the head of the bent arm (5). Several gaskets (11) are provided between the head of the positioning pin (6) and the top surface of the through hole seat (501). The pin shaft (7) passes through the through hole at the side plate of the bent arm (5) and the rotating arm (4) and is then locked by a nut.

5. The locking mechanism for a smoke exhaust pipe valve according to claim 1, characterized in that: The valve body (2) is either circular or rectangular in shape. Flanges (201) are provided at both ends of the valve body (2). A bending seat (202) is welded to the top of the valve body (2). The bending seat (202) is connected to the bottom plate of the annular groove seat (1) by bolts.

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