Limiting pressure relief valve

Abstract

The utility model relates to a kind of limit type pressure release valves, including valve seat, valve cover, transmission shaft, valve seat is horizontally set at the pressure relief port of the pipeline or storehouse to be controlled, valve cover is fixedly connected with transmission shaft, it is rotated by transmission shaft drive, for opening or closing pressure relief port;Transmission shaft is set on fixed base by bearing seat;Transmission shaft is also fixedly connected with limit component, it can rotate with transmission shaft autorotation;The first included angle between limit component and valve cover is fixed, it is less than 180 °;The top surface of fixed base forms limit surface, it is used to limit the rotation angle of limit component, to limit the rotation angle of valve cover;It also includes switch executor, it is transmission connection with transmission shaft, for providing driving force to make transmission shaft rotate, or when providing damping force when valve cover is driven transmission shaft to rotate by pressure.The utility model solves the technical problem that the opening angle of pressure release valve in the prior art is large and cannot be automatically reset.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, and in particular to a limit-type pressure relief valve. Background Technology

[0002] Pressure relief valves achieve pressure protection through mechanical and electrical linkages. In existing technology, the structure of a pressure relief valve mainly includes a valve seat, valve cover, valve disc, and spring system. The valve cover, as a pressure-bearing housing, provides a medium flow channel; the valve disc directly bears the medium pressure and is pressed against the valve seat by a spring or lever counterweight. The spring provides the sealing preload, and its stiffness, along with the weight of the valve cover, determines the opening pressure threshold.

[0003] Pressure relief valves are commonly used for pressure control in storage silos or flues. When the pressure inside the silo or flue rises to the valve's selected pressure value, the pressure overcomes the weight of the valve seat cover, lifting the cover off the seat and releasing the pressure. This continues until the pressure drops to the same value as the selected pressure, at which point the cover returns to its normal position. However, traditional pressure relief valves lack limit switches, meaning they cannot automatically return to their original position after a single release. Manual reset is required, leading to inconvenience. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a limit-type pressure relief valve, which solves the technical problem that the pressure relief valve in the prior art has a large opening angle and cannot automatically reset.

[0005] The technical solution adopted in this utility model is as follows: A limit-type pressure relief valve includes a valve seat, a valve cover, and a drive shaft. The valve seat is horizontally positioned at the pressure relief port of the pipeline or storage tank to be controlled. The valve cover is fixedly connected to the drive shaft and is driven to rotate by the drive shaft to open or close the pressure relief port. The drive shaft is mounted on a fixed base via a bearing seat. A limit component is also fixedly connected to the drive shaft, which can rotate with the rotation of the drive shaft. The limit component and the valve cover form a fixed first angle, which is less than 180°. The top surface of the fixed base forms a limiting surface, which is used to limit the rotation angle of the limiting component, thereby limiting the rotation angle of the valve cover. It also includes a switch actuator, which is connected to the drive shaft to provide driving force to rotate the drive shaft, or to provide damping force when the valve cover is subjected to pressure to rotate the drive shaft.

[0006] The preferred technical solution is as follows: The limiting component includes a longitudinal stop bar that is perpendicular to the drive shaft, and one end of the stop bar is connected to the drive shaft via a connector. The connector is sleeved on the drive shaft, and its bottom has an outwardly convex arc surface, which is used to cooperate with the limiting surface to limit the stroke of the longitudinal stop bar.

[0007] The valve cover includes a cover plate and a reinforcing structure provided on the cover plate. The reinforcing structure includes a connecting rib, one end of which extends out of the cover plate and is fixedly connected to the drive shaft.

[0008] The connector has connecting surfaces on both sides perpendicular to the axial direction of the drive shaft. One of the two connecting surfaces is connected to the longitudinal stop bar, and the other is connected to the connecting rib, thereby achieving a fixed connection with the drive shaft.

[0009] Two longitudinal stop bars are provided at axial intervals along the drive shaft.

[0010] The two longitudinal bars are connected by at least one transverse bar to form a frame structure.

[0011] The at least one horizontal stop bar is arranged at parallel intervals and is perpendicularly connected to the horizontal stop bar.

[0012] When the valve cover is in the closed state, the limiting component and the limiting surface form a second included angle, the sum of the second included angle and the first included angle is 180°.

[0013] The first included angle is 130°.

[0014] The switch actuator is a switch-type electric actuator that outputs rotational torque to the drive shaft.

[0015] The technical solution of this utility model can achieve at least some of the following beneficial effects: This invention utilizes the cooperation between the limiting component and the limiting surface of the fixed base to control the maximum opening angle of the valve cover, preventing reset difficulties caused by excessive opening angle. Simultaneously, a switch actuator provides power for the automatic reset of the valve cover and provides damping force to ensure timely opening of the release valve after reaching the set pressure, thus achieving automatic opening and closing of the pressure relief valve. This design is convenient to control and highly effective.

[0016] Other features and advantages of this invention will be set forth in the following description or may be learned by practicing this invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0018] Figure 2 This is a top view of an embodiment of the present utility model.

[0019] Figure 3This is a cross-sectional view of an embodiment of the present invention with the valve cover closed.

[0020] Figure 4 This is a cross-sectional view of an embodiment of the present invention with the valve cover in the open state.

[0021] Explanation of reference numerals in the attached drawings: 1. Valve seat; 2. Valve cover; 3. Switch actuator; 4. Drive shaft; 5. Limiting assembly; 6. Fixed base; 7. Bearing seat; 8. Connector; 21. Cover plate; 22. Connecting rib; 51. Transverse stop bar; 52. Longitudinal stop bar; 81. Outer convex arc surface. Detailed Implementation

[0022] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0023] See Figures 1 to 4 The pressure relief valve of this embodiment includes a valve seat 1, a valve cover 2, and a drive shaft 4. The valve seat 1 is horizontally disposed at the pressure relief port of the pipeline or storage tank to be controlled. The valve cover 2 is fixedly connected to the drive shaft 4 and is driven by the drive shaft 4 to rotate, thereby opening or closing the pressure relief port. The drive shaft 4 is disposed on a fixed base 6 through a bearing seat 7. A limit component 5 is also fixedly connected to the drive shaft 4, which can rotate with the rotation of the drive shaft 4. The limit component 5 and the valve cover 2 form a fixed first included angle α, which is less than 180°. The top surface of the fixed base 6 forms a limiting surface, which is used to limit the rotation angle of the limiting component 5, thereby limiting the rotation angle of the valve cover 2. It also includes a switch actuator 3, which is connected to the drive shaft 4 to provide driving force to rotate the drive shaft 4, or to provide damping force when the valve cover 2 is pressured to rotate the drive shaft 4.

[0024] This embodiment uses a limiting component at a fixed angle to the valve cover. The movement angle of the limiting component is limited by the cooperation between the limiting component and the limiting surface of the fixed base. When the limiting component moves to its limit position, the valve cover can open to its maximum angle, thereby controlling the opening angle of the valve cover.

[0025] As a preferred embodiment, the structure of the limiting component includes a longitudinal stop bar 52, which is perpendicular to the drive shaft 4, and one end of which is connected to the drive shaft 4 via a connector 8; the connector 8 is sleeved on the drive shaft 4, and its bottom has an outwardly convex arc surface 81, which is used to cooperate with the limiting surface to limit the stroke of the longitudinal stop bar 52.

[0026] The working principle of this embodiment is as follows: When the valve cover 2 is in a horizontal state, the pressure relief valve is in a closed state, and there is no contact between the outer convex arc surface 81 of the connector 8 and the limiting surface. Figure 3As shown, at this time, the limiting component 5 and the valve cover 2 form a fixed first included angle α, which is preferably 130°. The limiting component 5 and the limiting surface form a second included angle β, which is preferably 50°. When the pressure in the storage silo or flue increases to the pressure value selected by the valve, the pressure in the silo overcomes the weight of the valve cover 2 and the damping force of the switch actuator 3, and rotates through the transmission shaft 4, lifting the valve cover 2 from the valve seat 1 to the limiting position, as shown. Figure 4 As shown, at this time, the convex arc surface 81 of the connector 8 is blocked by the limiting surface, preventing the transmission shaft 4 from continuing to rotate, thus achieving the limiting effect. After the pressure in the storage tank or flue returns to normal, the switch actuator 3 starts, driving the transmission shaft 4 to rotate, causing the valve cover 2 to return to the closed state, preventing air leakage from the storage tank and flue. Figure 3 As shown.

[0027] As a preferred embodiment, the valve cover 2 includes a cover plate 21 and a reinforcing structure provided on the cover plate 21. The reinforcing structure includes connecting ribs 22, one end of which extends out of the cover plate 21 and is fixedly connected to the drive shaft 4. Specifically, the connecting ribs 22 are arranged in a crisscross pattern to ensure the uniformity and stability of the force on the cover plate 21.

[0028] As a preferred embodiment, the connector 8 is provided with connecting surfaces on both sides perpendicular to the axial direction of the drive shaft 4. One of the two connecting surfaces is connected to the longitudinal stop bar 52, and the other is connected to the connecting rib 22, thereby achieving a fixed connection with the drive shaft 4.

[0029] The connector 8 in this embodiment has a clever structural design and serves a dual purpose: on the one hand, it connects the longitudinal stop bar 52 to the connecting rib 22, thereby connecting the limiting component to the valve cover at a specific fixed angle. On the other hand, it achieves maximum stroke (angle) limiting by cooperating with the limiting surface of the fixed base 6 through the convex arc surface 81.

[0030] As a preferred embodiment, two longitudinal stop bars 52 are provided at axial intervals along the drive shaft 4.

[0031] As a preferred embodiment, the two longitudinal stops 52 are connected by at least one transverse stop 51 to form a frame structure, which makes the structure of the limiting component 5 more stable.

[0032] As a preferred embodiment, two transverse stops 51 are provided, arranged in parallel with intervals, and connected perpendicularly to the transverse stops 51.

[0033] As a preferred embodiment, the switch actuator 3 adopts a switch-type electric actuator (motor), which rotates after being energized and outputs rotational torque to the drive shaft 4.

[0034] This invention utilizes the cooperation between the limiting component and the limiting surface of the fixed base to control the maximum opening angle of the valve cover, preventing reset difficulties caused by excessive opening angle. Simultaneously, a switch actuator provides power for the automatic reset of the valve cover and provides damping force to ensure timely opening of the release valve after reaching the set pressure, thus achieving automatic opening and closing of the pressure relief valve. This design is convenient to control and highly effective.

[0035] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A limit-type pressure relief valve, comprising a valve seat (1), a valve cover (2), and a drive shaft (4), wherein the valve seat (1) is horizontally disposed at the pressure relief port of the pipeline or storage tank to be controlled, the valve cover (2) is fixedly connected to the drive shaft (4) and is driven by the drive shaft (4) to rotate, thereby opening or closing the pressure relief port; the drive shaft (4) is disposed on a fixed base (6) via a bearing seat (7); characterized in that, A limiting component (5) is also fixedly connected to the drive shaft (4), which can rotate with the rotation of the drive shaft (4); the limiting component (5) and the valve cover (2) form a fixed first angle, which is less than 180°; The top surface of the fixed base (6) forms a limiting surface, which is used to limit the rotation angle of the limiting component (5), thereby limiting the rotation angle of the valve cover (2). It also includes a switch actuator (3), which is connected to the drive shaft (4) to provide driving force to rotate the drive shaft (4), or to provide damping force when the valve cover (2) is pressure-driven to rotate the drive shaft (4).

2. The limit-type pressure relief valve according to claim 1, characterized in that, The structure of the limiting component (5) includes a longitudinal stop bar (52), which is perpendicular to the drive shaft (4), and one end is connected to the drive shaft (4) through a connector (8); The connector (8) is sleeved on the transmission shaft (4), and its bottom has an outwardly convex arc surface (81) which is used to cooperate with the limiting surface to limit the stroke of the longitudinal stop (52).

3. The limit-type pressure relief valve according to claim 2, characterized in that, The structure of the valve cover (2) includes a cover plate (21) and a reinforcing structure provided on the cover plate (21). The reinforcing structure includes a connecting rib (22), one end of which extends out of the cover plate (21) and is fixedly connected to the drive shaft (4).

4. The limit-type pressure relief valve according to claim 3, characterized in that, The connector (8) has connecting surfaces on both sides perpendicular to the axial direction of the drive shaft (4). One of the two connecting surfaces is connected to the longitudinal stop bar (52), and the other is connected to the connecting rib (22) to achieve a fixed connection with the drive shaft (4).

5. The limit-type pressure relief valve according to claim 2, characterized in that, Two longitudinal stop bars (52) are provided at axial intervals along the drive shaft (4).

6. The limit-type pressure relief valve according to claim 5, characterized in that, The two longitudinal bars (52) are connected by at least one transverse bar (51) to form a frame structure.

7. The limit-type pressure relief valve according to claim 6, characterized in that, The at least one transverse stop (51) is arranged in parallel at intervals and is perpendicularly connected to the transverse stop (51).

8. The limit-type pressure relief valve according to claim 1, characterized in that, When the valve cover (2) is in the closed state, the limiting component (5) forms a second angle with the limiting surface, and the sum of the second angle and the first angle is 180°.

9. The limit-type pressure relief valve according to claim 1 or 8, characterized in that, The first included angle is 130°.

10. The limit-type pressure relief valve according to claim 1, characterized in that, The switch actuator (3) is a switch-type electric actuator, which outputs rotational torque to the drive shaft (4).

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