Explosion valve
Technical Field
The invention relates to the technical field of safe pressure relief, in particular to a blast valve.
Background
The explosion valve is used for protecting the pressure container from being damaged due to overpressure. Has the advantages of simple structure, good sealing performance and the like. It is suitable for working environment where the working medium has high viscosity, strong corrosion performance and sharply raised pressure, and the common safety valve is unable to work.
Before the explosion valve is used, the air tightness of the explosion valve needs to be detected; because be equipped with the nick that is used for the blasting on the inside rupture disk of blast valve, under the effect of pressure is examined, the rupture disk can take place deformation along the nick, reduces the bearing capacity of rupture disk under the normal operating mode.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the pressure bearing capacity of the inner rupture disk of the explosion valve in the prior art is reduced after the air tightness detection is carried out, so that the explosion valve capable of reducing the influence of the air tightness detection on the rupture disk is provided.
In order to solve the above technical problem, the present invention provides a burst valve, including:
a gland having a first outflow channel;
a rupture disk covering the outlet of the first outflow channel and having a portion supported on the gland, the rupture disk having an annular score located on an area of the rupture disk for supporting on the gland;
one end of the shell is abutted against the blasting sheet and is connected with the gland in a sealing manner; one end of the shell, which is used for abutting against the rupture disk, is in contact with the outer area of the annular nick of the rupture disk; the shell is internally provided with a second outflow channel communicated with the first outflow channel, and the second outflow channel is arranged concentrically with the first outflow channel.
Preferably, a first annular groove is formed in the pressure cover at the outlet of the first outflow channel, and the rupture disk is mounted in the first annular groove.
Preferably, the housing is provided with an annular boss protruding toward the gland at one end for abutting against the rupture disk, and the annular boss abuts against an outer region of the annular notch of the rupture disk.
Preferably, the outer diameter of the annular boss is smaller than or equal to the inner diameter of the first annular groove.
Preferably, an inner diameter of the annular boss is smaller than an inner diameter of the second outflow passage.
Preferably, the second outflow channel has an inner diameter larger than that of the first outflow channel.
Preferably, the annular score is in a triangular groove structure.
Preferably, the annular score is a continuous score.
Preferably, the filter is further included, and a cover is arranged at the outlet of the second outflow channel.
Preferably, the housing is provided with a second annular groove at an outlet of the second outflow channel, and the filter is mounted in the second annular groove.
The technical scheme of the invention has the following advantages:
1. according to the explosion valve provided by the invention, one side of the explosion piece covers the outlet of the first outflow channel and is partially supported on the gland, the other side of the explosion piece is abutted against the shell, and the shell is connected with the gland in a sealing manner; the rupture disk is provided with an annular nick, the rupture disk faces one side of the gland, and the annular nick is partially supported on the gland; the outer area of the annular notch of the rupture disk abuts against the shell; when the pressure is introduced from the second outflow channel to perform air tightness detection on the explosion valve, the annular nick part is supported on the gland, so that the position where the explosion piece deforms can be located in the annular nick, and deformation along the annular nick cannot occur; . The influence of the air tightness detection on the pressure bearing capacity of the rupture disk can be avoided, and the pressure relief phenomenon of the pressure container under the condition of no overpressure is avoided. The second outflow channel on the shell and the first outflow channel are arranged concentrically, and smooth pressure relief can be guaranteed. The influence of the air tightness detection on the pressure bearing capacity of the rupture disk can be avoided.
2. According to the explosion valve provided by the invention, the pressure cover is provided with the first annular groove at the outlet of the first outflow channel, and the rupture disk is arranged in the first annular groove;
3. according to the explosion valve provided by the invention, one end of the shell, which is used for being abutted against the rupture disk, is provided with the annular boss extending towards the gland direction, and the annular boss is abutted against the outer area of the annular nick of the rupture disk; the area of the rupture disk in contact with the annular boss can be stressed in a concentrated mode, so that the shell is in closer contact with the rupture disk, and the air tightness of the rupture valve is guaranteed.
4. According to the explosion valve provided by the invention, the outer diameter of the annular boss is smaller than or equal to the inner diameter of the first annular groove; the annular boss can be inserted into the first annular groove, so that the shell can be tightly connected with the gland, and the air tightness of the explosion valve is improved.
5. According to the explosion valve provided by the invention, the inner diameter of the annular boss is smaller than that of the second outflow channel; the diameter of the rupture disk is smaller than the inner diameter of the second outflow channel, and the second outflow channel still has enough pressure relief channels after the rupture disk falls off in a pressure relief state, so that normal pressure relief is not influenced.
6. According to the explosion valve provided by the invention, the inner diameter of the second outflow channel is larger than that of the first outflow channel; when the explosion valve is in a pressure relief state, the medium can flow out rapidly, and the pressure relief speed is increased.
7. According to the explosion valve provided by the invention, the annular nicks are of the triangular groove structure, the structure is simple, the material removal is convenient, and the removal of the materials with the same thickness at each position is convenient to control.
8. According to the explosion valve provided by the invention, the annular nicks are continuous nicks, so that the explosion piece can fall off from the annular nicks integrally in a pressure relief state, and the pressure can be relieved rapidly.
9. According to the explosion valve provided by the invention, the filter cover is arranged at the outlet of the second outflow channel, and a medium flows out through the filter to be collected in a pressure relief state, so that the residue of the explosion piece is prevented from polluting the flowing medium.
10. According to the explosion valve provided by the invention, the second annular groove is arranged, so that the filter is convenient to position and mount.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a front sectional view of a burst valve provided in the present invention.
Fig. 2 is an enlarged view of the area a in fig. 1.
Fig. 3 is a schematic view of the installation position relationship between the gland and the housing.
Description of reference numerals:
1. a gland; 2. a housing; 3. a rupture disk; 4. a filter; 5. a first annular groove; 6. a first outflow channel; 7. a second outflow channel; 8. annular nicking; 9. an annular boss; 10. a second annular groove.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The blast valve that this embodiment provided includes: gland 1, casing 2, rupture disk 3 and filter 4.
As shown in fig. 1, 2 and 3, the gland 1 is cylindrical, a first outflow channel 6 is arranged at the center of the gland 1, and a first annular groove 5 is arranged at the outlet of the first outflow channel 6 on the gland 1; the shell 2 is cylindrical, a through second outflow channel 7 is arranged at the center of the shell 2, and an annular boss 9 facing outwards is arranged at an inlet of the second outflow channel 7 on the shell 2; the rupture disk 3 is circular, a continuous annular nick 8 is arranged on the rupture disk 3, and the annular nick 8 is of a triangular groove structure for removing materials; the rupture disk 3 is installed in a first annular groove 5 of the gland 1, an annular nick 8 of the rupture disk 3 is partially supported on the gland 1 at the first annular groove 5, and the diameter of the annular nick 8 is larger than the inner diameter of the first outflow channel 6; one side of the rupture disk 3, which is far away from the gland 1, abuts against an annular boss 9 of the shell 2, the outer area of the annular nick 8 is in contact with the annular boss 9, and the diameter of the annular nick 8 is smaller than the inner diameter of the annular boss 9; the annular boss 9 is inserted into the first annular groove 5, and the outlet end face of the first outflow channel 6 of the gland 1 is in close contact with the inlet end face of the second outflow channel 7 of the housing 2 and is connected by welding. When the side of the rupture disk 3 facing the shell 2 is subjected to detection pressure, the annular nick 8 is partially supported on the gland 1, so that the position where the rupture disk 3 deforms is positioned in the annular nick 8 and cannot deform along the annular nick 8; deformation cannot be generated along the annular nick; the influence of the air tightness detection on the pressure bearing capacity of the rupture disk can be avoided, and the pressure relief phenomenon of the pressure container under the condition of no overpressure is avoided.
As shown in fig. 1, the inner diameter of the annular boss 9 is larger than the inner diameter of the first outflow channel 6 and smaller than the inner diameter of the second outflow channel 7, and in a pressure relief state, a medium at the first outflow channel 6 can rapidly flow into the second outflow channel 7 through the inner diameter of the annular boss 9; even if the rupture disk 3 falls off, the second outflow channel 7 still has enough pressure relief channels, and normal pressure relief is not influenced. The first outflow channel 6 and the second outflow channel 7 are arranged concentrically, so that the medium can flow out uniformly and fully distributed at each position of the second outflow channel 7, and the smooth pressure relief is ensured.
As shown in fig. 1, a second annular groove 10 is provided at the outlet of the second outflow channel 7 on the housing 2, and the filter 4 is installed in the second annular groove 10, so that the medium is collected after flowing out through the filter 4, thereby preventing the residue of the rupture disk 3 from polluting the flowing medium.
The using process and the method are as follows:
the air tightness of the blasting valve is detected through pressure from the second outflow channel 7, and the blasting valve can be normally used after the air tightness requirement is met; the first outflow channel 6 of the explosion valve is connected with a pressure container, and when the pressure in the pressure container exceeds the preset pressure, the rupture disk 3 will rupture along the annular nick 8 to perform safe pressure relief.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.