Residual pressure valve mounting structure

Abstract

The utility model belongs to the field of residual pressure valves, and particularly relates to a residual pressure valve mounting structure which comprises a valve seat, a valve plate and a heavy hammer which are arranged in an exhaust pipeline, the exhaust pipeline is of a cylindrical structure, the valve seat is hinged to the valve plate, the valve seat is arranged on the inner wall of the exhaust pipeline in a sleeved mode and is obliquely arranged relative to the vertical direction of the exhaust pipeline, and the heavy hammer is arranged on the valve plate. The valve plate is hinged to the medium outlet side of the valve seat and has the freedom degree of swinging towards the medium outlet side relative to the valve seat, the valve plate and the valve seat are in opening and closing fit by means of the swinging freedom degree of the valve plate, and the heavy hammer is fixedly connected with the valve plate by means of the overhanging arm and overhung on the medium inlet side of the valve plate. According to the mounting structure, the opening angle of the valve plate relative to the exhaust pipeline can be increased under the same swing angle of the valve plate, and the effect of large flow under the small pressure difference of the residual pressure valve is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of residual pressure valves, and in particular relates to a residual pressure valve installation structure. Background Art

[0002] A residual pressure valve maintains indoor static pressure by automatically controlling the positive pressure in the room without energy consumption. Its operating principle is based on a one-way air flow control device, adjusting its opening according to the required static pressure differential. The air flow through the residual pressure valve typically ranges from 100 to 1200 m³ / h, maintaining a pressure differential between 5 and 50 Pa. As design requirements become increasingly stringent, residual pressure valves are required to meet high flow requirements under small pressure differentials. Therefore, improving the mounting structure of residual pressure valves has become a challenge for those skilled in the art. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a residual pressure valve installation structure, which can increase the opening angle of the valve plate relative to the exhaust pipe under the same valve plate swing angle, thereby achieving the effect of large flow under small pressure difference of the residual pressure valve.

[0004] The specific technical solution adopted in this utility model is:

[0005] A residual pressure valve installation structure includes a valve seat and a valve plate arranged inside an exhaust pipe. The exhaust pipe is a cylindrical structure. The valve seat and the valve plate are hingedly arranged. The key point is that it also includes a heavy hammer. The valve seat is mounted on the inner wall of the exhaust pipe and is inclined relative to the vertical direction of the exhaust pipe. The valve plate is hinged on the medium outlet side of the valve seat and has the freedom to swing toward the medium outlet side relative to the valve seat. The valve plate forms an opening and closing cooperation with the valve seat by means of its swinging freedom. The heavy hammer is fixedly connected to the valve plate by means of a cantilever arm and is cantilevered on the medium inlet side of the valve plate.

[0006] A limiting assembly is provided on the medium outlet side of the exhaust duct, and the limiting assembly includes a fixing plate, a fixing nut and an adjustable screw. The fixed end of the fixing plate is fixedly provided on the side wall of the medium outlet side of the exhaust duct, and the fixing nut is fixedly connected to the cantilevered end of the fixing plate. The adjustable screw with an external thread forms an adjustable thread fit with the fixing nut, and when the valve plate swings up, it abuts against the adjustable screw to form a limiting fit.

[0007] The cantilever arm includes a mounting portion, a cantilever portion and a fixed portion. The mounting portion and the fixed portion are respectively arranged parallel to the valve plate. The cantilever portion is perpendicular to the valve plate and the two ends of the cantilever portion are respectively connected to the lower end of the mounting portion and the upper end of the fixed portion. The fixed portion is fixedly connected to the upper section of the valve plate. The weight is installed at the upper end of the mounting portion. The cantilever arm forms a lifting structure for the weight from the side wall on the medium inlet side of the valve plate. The weight forms an avoidance fit with the valve seat with the help of the cantilever arm.

[0008] The valve seat includes a fixing ring with an L-shaped cross-section, which is arranged obliquely relative to the radial plane of the exhaust pipe. A retaining ring is arranged in the fixing ring and a U-shaped fixing groove is formed with the help of the retaining ring. A sealing ring is arranged in the fixing groove to form a sealing fit with the valve plate. A reinforcing rib connected to the exhaust pipe is also fixedly provided on the side wall of the fixing ring on the medium inlet side.

[0009] A ridge is provided on the side wall of the sealing ring on the medium outlet side, and the ridge contacts the valve plate to form a sealing fit with the exhaust pipe.

[0010] The sealing ring is connected to the fixing ring by means of bolts. The bolts pass through the inner edge of the fixing ring and penetrate into the sealing ring to form a detachable fixed fit with the sealing ring.

[0011] The reinforcing ribs are arranged in a circumferential array along the fixing ring, and the bottoms of the reinforcing ribs are arranged parallel to the inner wall of the exhaust pipe and are fixedly connected to the inner wall of the exhaust pipe.

[0012] The beneficial effects of the utility model are:

[0013] The utility model adopts the method of sleeve-mounting the valve seat on the inner wall of the exhaust pipe and tilting it relative to the vertical direction of the exhaust pipe. Under the same swinging angle of the valve plate, the opening angle of the valve plate in the exhaust pipe is increased, thereby meeting the requirement of large flow under small pressure difference.

[0014] The weight is cantilevered on the medium inlet side of the valve plate with the help of a cantilever arm to balance the weight of the valve plate, which is beneficial to the opening of the valve plate. On the other hand, the setting position of the weight enables the limit assembly to directly contact the side wall of the medium outlet side of the valve plate to limit the opening angle of the valve plate, which is further beneficial to increase the opening angle of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0017] Figure 3 This is a structural diagram of the utility model when the valve plate is in an open state;

[0018] In the accompanying drawings, 1. exhaust duct, 2. valve seat, 201. fixing ring, 202. retaining ring, 3. valve plate, 4. weight, 5. medium outlet side, 6. medium inlet side, 7. limit assembly, 701. fixing plate, 702. fixing nut, 703. adjustable screw, 8. cantilever arm, 801. mounting part, 802. cantilever part, 803. fixing part, 9. sealing ring, 901. ridge, 10. reinforcing rib, and the direction of the arrow represents the flow direction of the medium. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] Specific implementation examples Figure 1 As shown, a residual pressure valve installation structure includes a valve seat 2 and a valve plate 3 arranged inside the exhaust pipe 1. The exhaust pipe 1 is a cylindrical structure. The valve seat 2 and the valve plate 3 are hingedly arranged. It also includes a weight 4. The valve seat 2 is mounted on the inner wall of the exhaust pipe 1 and is tilted relative to the vertical direction of the exhaust pipe 1. The valve plate 3 is hinged to the medium outlet side 5 of the valve seat 2 and has the freedom to swing toward the medium outlet side 5 relative to the valve seat 2. The valve plate 3 forms an opening and closing cooperation with the valve seat 2 by virtue of its swinging freedom. The weight 4 is fixedly connected to the valve plate 3 by means of a cantilever arm 8 and is cantilevered on the medium inlet side 6 of the valve plate 3.

[0021] The valve seat 2 is inclined to the vertical direction of the exhaust pipe 1 and is fixedly connected to the inner wall of the exhaust pipe 1. A hinged plate is also fixedly provided on the inner wall of the exhaust pipe 1. The upper end of the valve plate 3 is hinged to realize the relative hinge connection between the valve plate 3 and the valve seat 2. The lower end of the valve plate 3 is inclined toward the medium outlet side 5 along the medium flow direction. When the valve plate 3 is closed, the angle with the medium flow direction is less than 90°. When a certain pressure difference occurs between indoor and outdoor, the lower end of the valve plate 3 swings upward with the medium flow direction, and the valve plate 3 opens in the exhaust pipe 1. Compared with the existing valve seat 2 that is 90° to the medium flow direction, at the same swinging action angle α of the valve plate 3, the opening angle β of the valve plate 3 in the exhaust pipe 1 increases. Figure 3 As shown, the requirement of large flow under small pressure difference is met; in this embodiment, the included angle between the valve seat 2 and the exhaust pipe 1 in the vertical direction is 15°. When the swinging action angle α of the valve plate 3 is 30° when it is opened, the opening angle β of the valve plate 3 in the exhaust pipe 1 is 45°, and the maximum opening angle of the valve plate 3 can reach 60°.

[0022] The weight 4 is fixedly connected to the valve plate 3 by means of the cantilever arm 8 and cantilevered on the medium inlet side 6 of the valve plate 3, balancing the weight of the valve plate 3 and facilitating smooth opening of the valve plate when there is a pressure difference between indoors and outdoors.

[0023] Furthermore, a limit assembly 7 is provided on the medium outlet side 5 of the exhaust duct 1. The limit assembly 7 includes a fixed plate 701, a fixed nut 702, and an adjustable screw 703. The fixed end of the fixed plate 701 is fixedly provided on the side wall of the medium outlet side 5 of the exhaust duct 1. The fixed nut 702 is fixedly connected to the cantilevered end of the fixed plate 701. The adjustable screw 703 with an external thread forms a threaded adjustable fit with the fixed nut 702. When the valve plate 3 swings upward, it abuts against the adjustable screw 703 to form a limit fit. When the valve plate 3 swings upward, the adjustable screw 703 abuts against the valve plate 3, limiting the maximum opening angle β of the valve plate 3 and preventing the opening angle β of the valve plate 3 from being too large. The position of the adjustable screw 703 can also be adjusted according to different requirements for the maximum flow rate of the medium by adjusting the screwing depth of the adjustable screw 703 and the nut 702 to achieve adjustment of the maximum opening angle β of the valve plate 3. The limit assembly 7 has a simple structure and is easy to adjust.

[0024] Furthermore, the cantilever arm 8 includes a mounting portion 801, an overhang portion 802, and a fixed portion 803. The mounting portion 801 and the fixed portion 803 are respectively arranged parallel to the valve plate 3. The overhang portion 802 is perpendicular to the valve plate 3, and the two ends of the overhang portion 802 are respectively connected to the lower end of the mounting portion 801 and the upper end of the fixed portion 803. The fixed portion 803 is fixedly connected to the upper section of the valve plate 3. The weight 4 is mounted on the upper end of the mounting portion 801. The cantilever arm 8 forms a lifting structure for the weight 4 from the side wall of the medium inlet side 6 of the valve plate 3. The weight 4 forms an avoidance fit with the valve seat 2 with the help of the cantilever arm 8. Since the weight 4 is located on the medium inlet side 6 of the exhaust pipe 1 to balance the weight of the valve plate 3, the weight 4 will not interfere with the valve seat 2 during the upward swing of the valve plate 3 due to the cantilevering of the cantilever arm 8, thereby achieving effective swing of the valve plate 3 and a reasonable structural layout of the residual pressure valve.

[0025] Further, such as Figure 2As shown, the valve seat 2 includes a retaining ring 201 with an L-shaped cross-section. The retaining ring 201 is tilted relative to the radial plane of the exhaust duct 1. A retaining ring 202 is disposed within the retaining ring 201, forming a U-shaped retaining groove with the retaining ring 202. The retaining groove houses a sealing ring 9 that seals with the valve plate 3. A reinforcing rib 10, which is connected to the exhaust duct 1, is also fixedly attached to the sidewall of the retaining ring 201 on the medium inlet side 6. The sealing ring 9 in the tilted retaining ring 201 fits snugly with the closed valve plate 3. The U-shaped retaining groove formed by the retaining ring 202 and the retaining ring 201 clamps and limits the sealing ring 9, preventing it from shifting during the opening and closing of the valve plate 3 and ensuring that the valve plate 3 is in close contact with the sealing ring 9 to effectively seal the exhaust duct 1. The reinforcing rib 10 and the valve plate 3 are respectively located on the medium inlet side 6 and the medium outlet side 5 of the fixing ring 201. The reinforcing rib 10 is used to support the fixing ring 201 and enhance the strength of the fixing ring 201, thereby preventing the fixing ring 201 from being damaged by the impact force generated by the closing of the valve plate 3, improving the stability of the fixing ring 201, and preventing the fixing ring 201 from being deformed or damaged.

[0026] Furthermore, a ridge 901 is provided on the side wall of the medium outlet side 5 of the sealing ring 9, and the ridge 901 contacts the valve plate 3 to form a sealing fit with the exhaust pipe 1, further improving the sealing performance of the exhaust pipe 1 when the valve plate 3 is closed.

[0027] Furthermore, the sealing ring 9 is connected to the fixed ring 201 by means of bolts. The bolts pass through the inner edge of the fixed ring 201 and penetrate into the sealing ring 9 to form a detachable fixed fit with the sealing ring 9. The installation method is simple and it is easy to install or remove and replace the sealing ring 9 on the fixed ring 201. At the same time, the connection stability between the sealing ring 9 and the fixed ring 201 is further improved, and the sealing ring 9 is prevented from moving due to the impact of the valve plate 3.

[0028] Furthermore, the bottom of the reinforcing rib 10 is arranged parallel to the inner wall of the exhaust duct 1 and is fixedly connected to the inner wall of the exhaust duct 1, which facilitates the connection between the reinforcing rib 10 and the inner wall of the exhaust duct 1; the reinforcing rib 10 is arranged in a circular array along the fixing ring 201, providing uniform multi-point support for the fixing ring 201, further improving the strength and stability of the fixing ring 201.

Claims

1. A residual pressure valve installation structure, comprising a valve seat (2) and a valve plate (3) arranged inside an exhaust pipe (1), wherein the exhaust pipe (1) is a cylindrical structure, and the valve seat (2) and the valve plate (3) are hingedly arranged, characterized in that: It also includes a weight (4), the valve seat (2) is mounted on the inner wall of the exhaust pipe (1) and is tilted relative to the vertical direction of the exhaust pipe (1), the valve plate (3) is hinged to the medium outlet side (5) of the valve seat (2) and has the freedom to swing toward the medium outlet side (5) relative to the valve seat (2), the valve plate (3) forms an opening and closing match with the valve seat (2) by means of its swinging freedom, and the weight (4) is fixedly connected to the valve plate (3) by means of a cantilever arm (8) and cantilevered to the medium inlet side (6) of the valve plate (3).

2. The residual pressure valve installation structure according to claim 1, characterized in that: A limiting assembly (7) is provided on the medium outlet side (5) of the exhaust duct (1), and the limiting assembly (7) includes a fixing plate (701), a fixing nut (702) and an adjustable screw (703). The fixed end of the fixing plate (701) is fixedly provided on the side wall of the medium outlet side (5) of the exhaust duct (1), the fixing nut (702) is fixedly connected to the cantilevered end of the fixing plate (701), and the adjustable screw (703) provided with an external thread forms an adjustable thread fit with the fixing nut (702). When the valve plate (3) swings upward, it abuts against the adjustable screw (703) to form a limiting fit.

3. The residual pressure valve installation structure according to claim 1, characterized in that: The cantilever arm (8) includes a mounting portion (801), an overhang portion (802) and a fixed portion (803), wherein the mounting portion (801) and the fixed portion (803) are respectively arranged in parallel with the valve plate (3), the overhang portion (802) is perpendicular to the valve plate (3) and the two ends of the overhang portion (802) are respectively connected to the lower end of the mounting portion (801) and the upper end of the fixed portion (803), the fixed portion (803) is fixedly connected to the upper section of the valve plate (3), the weight (4) is mounted on the upper end of the mounting portion (801), the cantilever arm (8) forms a lifting structure for the weight (4) from the side wall of the medium inlet side (6) of the valve plate (3), and the weight (4) forms an avoidance fit with the valve seat (2) with the help of the cantilever arm (8).

4. The residual pressure valve installation structure according to claim 1, characterized in that: The valve seat (2) includes a fixing ring (201) with an L-shaped cross-section. The fixing ring (201) is arranged at an angle relative to the radial plane of the exhaust pipe (1). A retaining ring (202) is arranged inside the fixing ring (201) and a U-shaped fixing groove is formed by means of the retaining ring (202). A sealing ring (9) is arranged in the fixing groove to form a sealing fit with the valve plate (3). A reinforcing rib (10) connected to the exhaust pipe (1) is also fixedly provided on the side wall of the medium inlet side (6) of the fixing ring (201).

5. The residual pressure valve installation structure according to claim 4, characterized in that: A ridge (901) is provided on the side wall of the medium outlet side (5) of the sealing ring (9), and the ridge (901) contacts the valve plate (3) to form a sealing fit with the exhaust pipe (1).

6. The residual pressure valve installation structure according to claim 4, characterized in that: The sealing ring (9) is connected to the fixing ring (201) by means of bolts, and the bolts pass through the inner edge of the fixing ring (201) and penetrate into the sealing ring (9) to form a detachable fixed fit with the sealing ring (9).

7. The residual pressure valve installation structure according to claim 4, characterized in that: The reinforcing ribs (10) are arranged in a circumferential array along the fixing ring (201), and the bottom of the reinforcing ribs (10) is arranged parallel to the inner wall of the exhaust pipe (1) and is fixedly connected to the inner wall of the exhaust pipe (1).

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