CN117646815A

CN117646815A - Safety valve

Info

Publication number: CN117646815A
Application number: CN202311479034.9A
Authority: CN
Inventors: 柯钢; 许建军; 张亚光; 崔洪斌; 蒋主倩
Original assignee: Beijing Kooland Technologies Co ltd
Current assignee: Beijing Kooland Technologies Co ltd
Priority date: 2023-11-08
Filing date: 2023-11-08
Publication date: 2024-03-05

Abstract

The application discloses relief valve, this relief valve is used for preventing that medium pressure from exceeding the predetermined value, and this relief valve includes interconnect's relief door plant and weight, the weight can be according to the size switching position of medium pressure is in order to control the switching of relief door plant, wherein: when the medium pressure is smaller than the preset value, the heavy hammer is in a closed position and can apply external force to the safety door plate so as to keep the safety door plate in a closed state; and when the medium pressure is greater than the preset value, the heavy hammer can move to a release position to cancel the external force applied to the safety door plate, so that the safety door plate can be restored to a default opening state. The safety valve disclosed by the application can adjust the position of the heavy hammer according to the change of the medium pressure, so that the safety door plate can be automatically and rapidly opened or closed.

Description

Safety valve

Technical Field

The present application relates to the field of medium pressure regulation, and more particularly to a relief valve.

Background

When the pressure of the medium in the pipe or the apparatus rises above a safety value, the safety valve can protect the entire system by discharging the medium to the outside of the pipe or the apparatus to prevent the pressure of the medium from exceeding a prescribed value.

Spring safety valves are a common type of safety valve that is used primarily to protect equipment and systems from damage beyond allowable pressures. The spring type safety valve uses the force of a compression spring to balance the force acting on the valve clack. However, the disadvantage is that the load applied varies with the opening of the valve, i.e. as the flap is raised, the compression of the spring increases and the force acting on the flap increases. This is unfavorable to the rapid opening of relief valve, can't satisfy the timely requirement of cabin pressure release, easily causes the potential safety hazard.

The explosion membrane type explosion door consists of an explosion membrane and a clamping device, and when explosion occurs in a combustion chamber, the generated pressure causes the explosion membrane to be broken, so that the pressure relief effect is achieved. The rupture disk has the advantages of good sealing performance, quick response, high sensitivity and large discharge capacity, and can adapt to different environments, but has the defect that the rupture disk cannot be recovered to the original state after pressure relief is completed, and cannot be reused.

Disclosure of Invention

In order to solve the technical problems of the existing spring safety valve and burst film type explosion vent, the application discloses a safety valve capable of simultaneously meeting two requirements of quick pressure relief and automatic reset. The safety valve is used for preventing the pressure of the medium from exceeding a preset value (for example, the safety valve can be used for adjusting the internal pressure of a sealed cabin body), and comprises a safety door plate and a heavy hammer which are connected with each other, and is characterized in that: the heavy hammer can switch positions according to the medium pressure so as to control the opening and closing of the safety door plate, wherein:

when the medium pressure is smaller than the preset value, the heavy hammer is in a closed position and can apply external force to the safety door plate so as to keep the safety door plate in a closed state; and, a step of, in the first embodiment,

when the medium pressure is greater than the preset value, the heavy hammer can move to a release position to cancel the external force applied to the safety door plate, so that the safety door plate can restore to a default opening state. The default (default) refers to a state that a mechanism is not acted by external force; under the influence of an external force, the mechanism will leave the default state.

Preferably, the weight is disposed on a track with a predetermined inclination angle, and is mapped by a site mapping theory calculation and a protractor, preferably, the inclination angle is 14 °, and the weight is connected with a safety door panel through a rope body to apply the external force to the safety door panel, wherein:

when the medium pressure is smaller than the preset value, the heavy hammer is kept at a low position A of the track under the action of self gravity, and the low position A is positioned relatively far away from the safety door plate so as to tension the rope body; and, a step of, in the first embodiment,

when the medium pressure is greater than the preset value, the weight can overcome the gravity of the weight under the action of the medium pressure to move to the high position B of the track, and the high position B is positioned relatively close to the safety door plate so that the rope body can be loosened.

Preferably, the track has a convex arc segment and a straight segment, wherein: the convex arc-shaped section is arranged on one side of the low position A and is smoothly connected with the straight line section extending to one side of the high position B; and the heavy hammer needs to pass through the convex arc section in the process of moving from the low position A to the high position B. After the heavy hammer passes through the convex arc section and enters the straight line section, the thrust required by keeping the heavy hammer on the track of the straight line section is smaller than the thrust required by the heavy hammer passing through the track of the convex arc section, so that the safety door plate is not closed immediately after being opened, but when the pressure of a medium is gradually reduced to a certain set value, the heavy hammer returns to an initial low position A along the track under the action of gravity, and simultaneously drives the safety door plate to be closed, and the whole safety valve completes the pressure relief process.

Preferably, the weight has a dumbbell shape, and the dumbbell shape includes two discs symmetrically located at two sides and a connecting rod connecting the two discs; and the rail is provided with two L-shaped guide rails which are arranged in parallel and are respectively matched with the two tray bodies.

Preferably, the safety valve has a housing having an inlet and an outlet, wherein: the safety door plate is rotatably arranged at the outlet; the track is fixedly arranged in the box body; and the inlet is connected with the environment where the medium is located, and an air channel is formed between the inlet and the track so as to conduct the pressure of the medium to the heavy hammer.

Preferably, the box body is provided with a plurality of inlets and outlets which correspond to each other, and is correspondingly provided with a plurality of safety door plates, a rail and a heavy hammer, so that the requirement of simultaneously discharging a large amount of medium is met; wherein: the plurality of inlets and outlets are arranged at intervals along the horizontal or vertical direction, and the plurality of safety door plates, the rails and the heavy hammer are also arranged correspondingly.

Preferably, the box body is made of stainless steel materials, so that the deformation resistance and corrosion resistance of the box body are improved, and the service life of the box body is prolonged.

The safety valve disclosed by the application can adjust the position of the heavy hammer according to the change of the medium pressure, so that the safety door plate can be automatically and rapidly opened or closed. Additional features and advantages of the present application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a schematic diagram of a safety valve according to an embodiment of the present application, wherein the safety door plate is in a closed state or an open state when the weight is at both a low position A and a high position B; meanwhile, the position relation between the heavy hammer at the low position A and the convex arc section is also shown in the figure;

FIG. 2 is a schematic diagram of a weight having a dumbbell shape according to one embodiment of the present invention;

FIG. 3 is a front view of a track disclosed in one embodiment of the present application;

FIG. 4 is a schematic diagram illustrating a connection between a rope and a security door panel according to an embodiment of the present application;

fig. 5 is a schematic diagram of a safety valve with two inlets and outlets spaced from each other, and a plurality of safety door panels, rails and weights having corresponding layout according to an embodiment of the present invention.

Reference numerals:

Detailed Description

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in combination with embodiments.

The application discloses can satisfy relief valve of two demands of quick release and automatic re-setting simultaneously. The safety valve is used for preventing the pressure of the medium from exceeding a preset value (for example, the safety valve can be used for adjusting the internal pressure of a sealed cabin body), and comprises a safety door plate and a heavy hammer which are connected with each other, and is characterized in that: the heavy hammer can switch positions according to the medium pressure so as to control the opening and closing of the safety door plate, wherein: when the medium pressure is smaller than the preset value, the heavy hammer is in a closed position and can apply external force to the safety door plate so as to keep the safety door plate in a closed state; and when the medium pressure is greater than the preset value, the heavy hammer can move to a release position to cancel the external force applied to the safety door plate, so that the safety door plate can be restored to a default opening state. The default (default) refers to a state that a mechanism is not acted by external force; under the influence of an external force, the mechanism will leave the default state.

The weight may be moved by various transmission mechanisms to achieve the above-mentioned position switching, for example, a spring mechanism or a lever mechanism may be used, preferably, as shown in fig. 1, the weight is disposed above a track with a predetermined inclination angle (the inclination angle is preferably 14 °) and the weight is connected to a safety door panel through a rope to apply the external force to the safety door panel, wherein: when the medium pressure is smaller than the preset value, the heavy hammer is kept at a low position A of the track under the action of self gravity, and the low position A is positioned relatively far away from the safety door plate so as to tension the rope body; and when the medium pressure is greater than the preset value, the weight can overcome the gravity of the weight under the action of the medium pressure to move to the high position B of the track, and the high position B is positioned relatively close to the safety door plate so as to enable the rope body to be loosened.

Preferably, as shown in fig. 1, the track has a convex arc segment and a straight segment, wherein: the convex arc-shaped section is arranged on one side of the lower position A of the track, and the heavy hammer needs to pass through the convex arc-shaped section in the process of moving from the lower position A to the higher position B. After the heavy hammer passes through the convex arc section and enters the straight line section, the thrust required by keeping the heavy hammer on the track of the straight line section is smaller than the thrust required by the heavy hammer passing through the track of the convex arc section, so that the safety door plate is not closed immediately after being opened, but when the pressure of a medium is gradually reduced to a certain set value, the heavy hammer returns to an initial low position A along the track under the action of gravity, and simultaneously drives the safety door plate to be closed, and the whole safety valve completes the pressure relief process.

The weight may have various shapes suitable for position switching, for example, may have a pulley, preferably, as shown in fig. 2, the weight has a dumbbell shape including two discs symmetrically located at both sides and a link connecting the two discs; and the rail is provided with two L-shaped guide rails which are arranged in parallel and are respectively matched with the two tray bodies.

Preferably, as shown in fig. 5, the box body is provided with a plurality of inlets and outlets corresponding to each other, and correspondingly is provided with a plurality of safety door plates, rails and weights, so as to realize the requirement of discharging a large amount of medium at the same time; wherein: the plurality of inlets and outlets are arranged at intervals along the horizontal or vertical direction, and the plurality of safety door plates, the rails and the heavy hammer are also arranged correspondingly.

The following describes the technical scheme of the present application in further detail with reference to examples and drawings.

The safety valve provided by the invention has the characteristics of automatic reset and quick response, and comprises: heavy hammer, track, C-shaped plate, rope, lifting lug, spring, safety door plate, track bracket, bracket angle code and box; the whole device is distributed in a box body, the heavy hammer is connected with a lifting lug on the safety door plate through a rope body (as shown in figure 4), and the reciprocating of the motion is realized on a track; the rail is positioned below the heavy hammer, and is welded with the C-shaped plate by the rail bracket to realize the supporting and fixing of the rail; the safety door plate is hinged and fixed on the outer side of the box body; the rail bracket is connected with the box body through an angle code and an M10 bolt to fix the rail bracket. A small opening is opened from the left side of the device to be connected with a blower tube, and the pressure change caused by the pressure difference change of the box under the vacuum environment is simulated by the change of wind power.

The dumbbell type heavy hammer comprises a dumbbell type heavy hammer, a rail bracket, a rope body, a safety door plate and a spring, wherein the heavy hammer is connected with the safety door plate through the rope body and a lifting lug. When the preset pressure value is reached in the sealing device, the heavy hammer on the sliding rail is pushed to move upwards, the pulling force transmitted to the safety door plate through the rope body is reduced, the safety door plate is opened under the action of inertia at the moment, the opening pressure relief of the door plate is realized, after the pressure value is reduced to a certain degree, the thrust born by the heavy hammer on the rail is reduced, the heavy hammer moves downwards under the action of gravity, and the door plate is closed. The invention has the advantages of quick response and quick pressure relief.

When the blower does not operate, the pressure in the box body is the same as the pressure in the outward direction, the heavy hammer is subjected to the pulling force of the rope body and the supporting force of the rail, the door plate is kept in a static state under the action of self gravity, and the door plate is subjected to the pulling force of the heavy hammer to the left and the lower side at the moment, so that the door plate is kept in a closed state.

When the blower runs, the wind force is continuously increased to simulate the pressure increasing process in the box body, when the wind force is increased to a certain critical value, the heavy hammer works against gravity under the action of rightward wind force, slides on the track, the door plate is reduced by the traction force of the heavy hammer, and the valve is opened under the action of gravity to realize pressure relief. At the moment, the door plate is connected with the rail through the linear spring, and the semi-closed state of the door plate is kept. The blower is closed, the state after pressure relief is simulated is completed, at the moment, the weight is subjected to rightward thrust reduction, the weight is insufficient to overcome gravity, the weight slides downwards along the track under the action of the gravity, the valve is also closed along with the movement of the weight, and the device returns to the initial position state.

According to the method, the wind power change of the blower in the device is used for simulating the pressure relief process when the cabin is connected with the device, and the feasibility of the invention is preliminarily verified by using a simple device.

Preferably, the box body is provided with a plurality of inlets and outlets which correspond to each other, and is correspondingly provided with a plurality of safety door plates, a rail and a heavy hammer, so that the requirement of simultaneously discharging a large amount of medium is met; wherein: the plurality of inlets and outlets are arranged at intervals along the horizontal or vertical direction, and the plurality of safety door plates, the rails and the heavy hammer are also arranged correspondingly. Specifically: the invention provides a self-resetting quick response safety valve, which comprises a heavy hammer, a track, a C-shaped plate, a rope body, a lifting lug, a spring, a safety door plate, a track bracket, a bracket angle code and a box body, wherein the heavy hammer is arranged on the track; the whole device is divided into an upper layer and a lower layer, the pressure relief requirement of a large-capacity cabin body can be met through the structure of a double valve, an opening is arranged on the left side according to the installation requirement and is used as an inlet for connecting air pressure with the cabin body, a concrete device of a residual pressure valve is arranged on the right side, and the heavy hammer is connected with a lifting lug on a safety door plate through a rope body to realize reciprocating motion on a track; the rail is positioned below the heavy hammer and is welded with the C-shaped plate by the rail bracket to realize supporting and fixing; the safety door plate is hinged and fixed on the outer side of the box body; the rail bracket is connected with the box body through an angle code and an M10 bolt to fix the rail bracket.

When the pressure in the cabin body transferred to the device is continuously increased to a certain critical value, the weight is pressed on the track by the right thrust weight against the gravity, at the moment, the valve is opened, and the device starts to release pressure. After the heavy hammer passes through the front arc-shaped track, the thrust required by the heavy hammer on the track is kept smaller than the thrust required by the heavy hammer at the initial point, so that the valve cannot be closed immediately after being opened, but when the air pressure gradually reduces to a certain set value, the heavy hammer returns to the initial state along the track under the action of gravity, and simultaneously the valve is driven to be closed, so that the whole device is subjected to pressure relief.

The self-resetting quick-response safety valve has attractive appearance and complete functions, can meet the requirement of quick pressure relief in the device, is easy to install and operate, and is a practical novel invention for engineering technicians.

In the description of the present application, it should be noted that: the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or that the technical features are commonly put in use, merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the technical features referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application; the terms "first," "second," "third," and the like, are used solely for distinguishing between descriptions and should not be construed as indicating or implying a relative importance; the terms "horizontal," "vertical," "overhang," and the like do not denote that the component is required to be absolutely horizontal or overhang, but rather may be slightly inclined (e.g., "horizontal" merely means that its direction is more horizontal than "vertical" and does not denote that the structure must be entirely horizontal, but may be slightly inclined); the terms "substantially," "essentially," and "approximately" mean that a certain feature or range is somewhat similar or approaching a predetermined requirement, but need not be completely consistent, which implies some flexibility and scope of variation, allowing for certain modifications without affecting its core concept or functionality; furthermore, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in conjunction with the specific circumstances.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail.

Moreover, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein.

Claims

1. A safety valve for preventing a medium pressure from exceeding a predetermined value, the safety valve comprising a safety door plate and a weight connected to each other, characterized in that: the heavy hammer can switch positions according to the medium pressure so as to control the opening and closing of the safety door plate, wherein:

when the medium pressure is greater than the preset value, the heavy hammer can move to a release position to cancel the external force applied to the safety door plate, so that the safety door plate can restore to a default opening state.

2. The safety valve according to claim 1, wherein: the weight is arranged on the track with a preset inclination angle, and is connected with the safety door plate through the rope body, wherein:

3. The safety valve according to claim 2, wherein: the track has a convex arc segment and a straight segment, wherein: the convex arc-shaped section is arranged on one side of the low position A and is smoothly connected with the straight line section extending to one side of the high position B; and the heavy hammer needs to pass through the convex arc section in the process of moving from the low position A to the high position B.

4. A safety valve according to claim 2 or 3, characterized in that: the weight has a dumbbell shape, and the dumbbell shape comprises two disc bodies symmetrically positioned at two sides and a connecting rod for connecting the two disc bodies; and the rail is provided with two L-shaped guide rails which are arranged in parallel and are respectively matched with the two tray bodies.

5. The safety valve according to claim 2, wherein: the safety valve has a housing having an inlet and an outlet, wherein: the safety door plate is rotatably arranged at the outlet; the track is fixedly arranged in the box body; and the inlet is connected with the environment where the medium is located, and an air channel is formed between the inlet and the track so as to conduct the pressure of the medium to the heavy hammer.

6. The safety valve according to claim 5, wherein: the box body is provided with a plurality of inlets and outlets which correspond to each other, and is correspondingly provided with a plurality of safety door plates, a rail and a heavy hammer; wherein: the plurality of inlets and outlets are arranged at intervals along the horizontal or vertical direction, and the plurality of safety door plates, the rails and the heavy hammer are also arranged correspondingly.

7. The safety valve according to claim 5, wherein: the box body is made of stainless steel.