Negative pressure rupture disk device for storage tank and storage tank

Abstract

The utility model relates to the technical field of storage tank safety equipment, and discloses a negative pressure rupture disk device for a storage tank and the storage tank, the negative pressure rupture disk device for the storage tank comprises a clamping assembly, a supporting sheet and a rupture disk, and the clamping assembly is provided with a clamping position; at least part of the edge of the supporting piece is clamped in the clamping position by the clamping assembly, a first fracture guide line is arranged on the supporting piece, and the strength of the first fracture guide line is smaller than that of the supporting piece; the edge of the rupture disk is clamped in the clamping position by the clamping assembly, the rupture disk and the supporting sheet are arranged in a stacked mode, at least part of the rupture disk is connected with the supporting sheet, a second rupture guide line is arranged on the rupture disk, and the strength of the second rupture guide line is smaller than that of the rupture disk. When the supporting piece is broken along the first breaking guide line, the rupture piece is broken along the second breaking guide line and is kept connected with the supporting piece, the rupture piece is prevented from falling into the storage tank and polluting the interior of the storage tank, and therefore the cleaning workload of the storage tank is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of storage tank safety equipment, in particular to a negative pressure bursting disc device for a storage tank and a storage tank. Background Art

[0002] When using a storage tank to store materials for a long time, negative pressure will be formed in the storage tank due to reasons such as material volatilization. Excessive negative pressure is likely to cause harm such as deformation and cracking of the storage tank body. At present, generally a breather cap or a deadweight safety valve is set on the storage tank as a breather of the storage tank to avoid excessive negative pressure in the storage tank. However, using a breather cap or a deadweight safety valve is likely to cause the gas inside and outside the storage tank to communicate, affecting the cleanliness inside the storage tank. By setting a bursting disc device on the storage tank, although the inside of the storage tank can be sealed to solve problems such as gas leakage and air leakage in the storage tank, when negative pressure appears in the storage tank and causes the bursting disc to rupture, the bursting disc is likely to fall into the storage tank after rupture, causing pollution inside the storage tank and increasing the cleaning workload of the storage tank. Content of the Utility Model

[0003] The purpose of the utility model is to provide a negative pressure bursting disc device for a storage tank and a storage tank to avoid the bursting disc falling into the storage tank after rupture.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a negative pressure bursting disc device for a storage tank, including:

[0006] A clamping assembly for connecting with the storage tank, and the clamping assembly is provided with a clamping position;

[0007] A support sheet, at least part of the edge of the support sheet is clamped by the clamping assembly in the clamping position, a first rupture guiding line is arranged on the support sheet, and the strength of the first rupture guiding line is less than the strength of the support sheet; and

[0008] A bursting disc, the edge of the bursting disc is clamped by the clamping assembly in the clamping position, the bursting disc and the support sheet are stacked, and at least part of the bursting disc is connected with the support sheet, a second rupture guiding line is arranged on the bursting disc, and the strength of the second rupture guiding line is less than the strength of the bursting disc;

[0009] When the support sheet ruptures along the first rupture guiding line, the bursting disc ruptures along the second rupture guiding line and remains connected with the support sheet, so that the inside and outside of the storage tank are communicated.

[0010] In some embodiments, both the support sheet and the bursting disc are arched, and when the clamping assembly is connected with the storage tank, the concave surfaces of the support sheet and the bursting disc both face the inside of the storage tank.

[0011] In some embodiments, the support piece and the rupture disc are arranged in sequence along the air inlet direction of the storage tank.

[0012] In some embodiments, a plurality of first rupture guiding lines are provided, and the plurality of first rupture guiding lines are arranged in a star shape; the clamping position is provided with a plurality of clamping points, and the vertex positions of the star shape match the positions of the clamping points.

[0013] In some embodiments, the rupture disc is fixedly connected to the support piece by crimping, and the crimping point of the rupture disc and the support piece is located at the corner position of the star shape.

[0014] In some embodiments, the second rupture guiding lines are connected end to end on the rupture disc to enclose a rupture area, and the connection position between the rupture disc and the support piece is located within the rupture area.

[0015] In some embodiments, the second rupture guiding lines are circular and are arranged along the circumferential direction of the rupture disc.

[0016] In some embodiments, the clamping assembly includes a first fixing ring piece, a second fixing ring piece and a fastener. The first fixing ring piece is used for connecting with the storage tank. The second fixing ring piece is relatively spaced apart from the first fixing ring piece along the axial direction of the first fixing ring piece. The fastener is used for fastening the first fixing ring piece and the second fixing ring piece so that the space between the first fixing ring piece and the second fixing ring piece forms a clamping position.

[0017] In some embodiments, a plurality of fasteners are provided, and the plurality of fasteners are spaced apart along the circumferential direction of the first fixing ring piece to form a plurality of clamping points within the clamping position.

[0018] The present utility model further provides a storage tank, including a tank body and the negative pressure rupture disc device for the storage tank as described above. The clamping assembly is connected to the top or side wall of the tank body.

[0019] Compared with the prior art, the negative pressure rupture disc device for a storage tank and the storage tank according to the embodiments of the present utility model have the beneficial effects that:

[0020] The negative pressure rupture disc device for storage tanks according to the embodiment of the present utility model includes a clamping assembly, a support sheet, and a rupture disc. It is connected to the storage tank through the clamping assembly, and the negative pressure rupture disc device as a whole can be installed on the storage tank for use. The support sheet and the rupture disc are stacked, and at least part of the rupture disc is connected to the support sheet. The support sheet provides support for the rupture disc, and the clamping assembly clamps and fixes the support sheet and the rupture disc. A first rupture guiding line is provided on the support sheet, and a second rupture guiding line is provided on the rupture disc. During use, when the negative pressure in the storage tank reaches the set value, since the strength of the first rupture guiding line is less than that of the support sheet, and the strength of the second rupture guiding line is less than that of the rupture disc, the first rupture guiding line and the second rupture guiding line are pre-ruptured under the impact of the intake pressure outside the storage tank, causing the support sheet to rupture along the first rupture guiding line and the rupture disc to rupture along the second rupture guiding line, so that the inside and outside of the storage tank are connected, and the negative pressure in the storage tank is released. Since the rupture disc is partially connected to the support sheet, when the support sheet and the rupture disc rupture, the rupture disc remains partially connected to the support sheet, preventing the rupture disc from falling into the storage tank and causing pollution inside the storage tank, thereby reducing the cleaning workload of the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a top view schematic diagram of the negative pressure rupture disc device for storage tanks according to the embodiment of the present utility model;

[0022] Figure 2 is a front view schematic diagram of the negative pressure rupture disc device for storage tanks according to the embodiment of the present utility model;

[0023] Figure 3 is Figure 2 an enlarged schematic diagram of A in

[0024] Figure 4 is a connection schematic diagram of the support sheet and the rupture disc in the embodiment of the present utility model;

[0025] Figure 5 is a schematic diagram of the storage tank according to the embodiment of the present utility model Figure 1 ;

[0026] Figure 6 is a schematic diagram of the storage tank according to the embodiment of the present utility model Figure 2 .

[0027] Reference numerals in the figures:

[0028] 100, negative pressure rupture disc device for storage tanks; 200, tank body; 201, opening;

[0029] 1, clamping assembly; 11, first fixing ring piece; 12, second fixing ring piece; 13, fastener; 2, support sheet; 21, first rupture guiding line; 22, clamping part; 3, rupture disc; 31, second rupture guiding line; 311, rupture area; 32, pressing point. Detailed implementation manners

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0033] Refer to Figures 1 - 6 As shown, the present embodiment of the utility model provides a negative pressure rupture disc device 100 for a storage tank, which includes a clamping assembly 1, a support sheet 2, and a rupture disc 3. The clamping assembly 1 is used to connect with the storage tank, and the clamping assembly 1 is provided with a clamping position; at least part of the edge of the support sheet 2 is clamped by the clamping assembly 1 in the clamping position. The support sheet 2 is provided with a first rupture guiding line 21, and the strength of the first rupture guiding line 21 is less than that of the support sheet 2. The first rupture guiding line 21 is used to form a rupture path of the support sheet 2 and guide the support sheet 2 to rupture; the edge of the rupture disc 3 is clamped by the clamping assembly 1 in the clamping position. The rupture disc 3 and the support sheet 2 are stacked, and the rupture disc 3 is at least partially connected to the support sheet 2. The rupture disc 3 is provided with a second rupture guiding line 31, and the strength of the second rupture guiding line 31 is less than that of the rupture disc 3. The second rupture guiding line 31 is used to form a rupture path of the rupture disc 3 and guide the rupture disc 3 to rupture.

[0034] When the negative pressure in the storage tank reaches the set value, since the strength of the first rupture guiding line 21 is less than that of the support piece 2, and the strength of the second rupture guiding line 31 is less than that of the rupture disk 3, the first rupture guiding line 21 and the second rupture guiding line 31 rupture in advance under the negative pressure adsorption impact, causing the support piece 2 to rupture along the first rupture guiding line 21 and the rupture disk 3 to rupture along the second rupture guiding line 31, so that the inside and outside of the storage tank are connected, and the negative pressure in the storage tank is released. Since the rupture disk 3 is partially connected to the support piece 2, when the support piece 2 and the rupture disk 3 rupture, the rupture disk 3 remains partially connected to the support piece 2, preventing the rupture disk 3 from falling into the storage tank and causing pollution inside the storage tank, thereby reducing the cleaning workload of the storage tank.

[0035] The first rupture guiding line 21 and the second rupture guiding line 31 form an optimal rupture path, facilitating the formation of a larger air intake channel in a shorter time and relieving pressure faster to protect the storage tank equipment. The setting methods of the first rupture guiding line 21 and the second rupture guiding line 31 are basically the same. Taking the first rupture guiding line 21 as an example, the first rupture guiding line 21 can be in the form of a groove. By opening the groove, the strength at the first rupture guiding line 21 is reduced, making it easier to rupture compared to other parts on the support piece 2. The first rupture guiding line 21 can also be made of a different material from other parts on the support piece 2, so that the strength at the first rupture guiding line 21 is less than that at other positions of the support piece 2 and is prone to rupture.

[0036] When the storage tank is in an atmospheric pressure state, the rupture disk 3 seals the storage tank. When the storage tank is in a negative pressure state and reaches the set value, the rupture disk 3 ruptures to release the negative pressure in the storage tank. The rupture disk 3 can be made of food-grade elastic materials such as silica gel and PVC film.

[0037] Refer to Figure 2 and Figure 3 As shown, in some embodiments, both the support piece 2 and the rupture disk 3 are arched. When the clamping assembly 1 is connected to the storage tank, the concave surfaces of the support piece 2 and the rupture disk 3 both face the inside of the storage tank, so that the concave surfaces of the support piece 2 and the rupture disk 3 face the storage tank directly, receiving the negative pressure adsorption effect released inside the storage tank and facilitating the rupture of the rupture disk 3. In some embodiments, the support piece 2 and the rupture disk 3 are arranged in sequence along the air intake direction of the storage tank. The support piece 2 is arranged on the side away from the storage tank, and the rupture disk 3 is arranged on the side close to the storage tank. When the storage tank is in an atmospheric pressure state, the support piece 2 is located on the side away from the storage tank, and the support piece 2 plays a role in supporting and protecting the rupture disk 3, ensuring the shape and sealing performance of the rupture disk 3. The rupture disk 3 faces the inside of the storage tank, facilitating the sealing of the storage tank by the rupture disk 3 and preventing air leakage or gas leakage between the inside and outside of the storage tank. When a negative pressure state appears in the storage tank and the negative pressure in the storage tank reaches the set value, the negative pressure in the storage tank directly acts on the rupture disk 3 without being blocked by the support piece 2, causing the rupture disk 3 to rupture and collapse quickly, facilitating the pulling out and tearing damage of the rupture disk 3 and accelerating the release of the negative pressure in the storage tank.

[0038] Refer to Figure 1 and Figure 4 As shown, in some embodiments, there are multiple first rupture guiding lines 21, and the multiple first rupture guiding lines 21 are arranged in a star shape. The clamping position is provided with multiple clamping points, and the vertex positions of the star are clamped at the clamping position and match the positions of the clamping points. Multiple clamping portions 22 are arranged along the circumferential direction of the edge of the support sheet 2, corresponding to the vertex positions of the star. The multiple clamping portions 22 are arranged in one-to-one correspondence with the multiple clamping points, and the support sheet 2 is clamped at the clamping points through the clamping portions 22. In other embodiments, the multiple first rupture guiding lines 21 can also be arranged in other shapes such as triangles and rectangles. It should be noted that the arrangement of the first rupture guiding lines 21 enables the support sheet 2 to remain clamped within the clamping position after rupture, preventing the support sheet 2 from falling into the storage tank.

[0039] Refer to Figure 1 and Figure 4 As shown, in some embodiments, the rupture disk 3 is press-fitted and fixed to the support sheet 2. The press-fitting point 32 between the rupture disk 3 and the support sheet 2 is located at the corner position of the star, facilitating the press-fitting process. Moreover, placing the connection point position between the rupture disk 3 and the support sheet 2 at the corner position of the star enables the part of the first rupture guiding line 21 within the star contour formed on the support sheet 2 to remain connected to the part outside the star contour on the support sheet 2, preventing the part within the star contour from falling into the storage tank after rupture, and thus preventing the rupture disk 3 connected to the support sheet 2 from falling into the storage tank.

[0040] It should be noted that in other embodiments, the rupture disk 3 and the support sheet 2 can also adopt other connection methods such as welding and bolt connection. When using bolt connection, attention should be paid to the sealing performance at the connection point position to ensure the sealing performance of the rupture disk 3 for the inside of the storage tank.

[0041] Refer to Figure 1 and Figure 4As shown, in some embodiments, the second rupture guiding line 31 is connected end to end on the rupture disk 3 to enclose a rupture area 311. The connection position between the rupture disk 3 and the support disk 2 is located within the rupture area 311. When the rupture disk 3 ruptures along the second rupture guiding line 31, since the second rupture guiding line 31 is connected end to end, the rupture disk 3 is broken into two parts after rupture. The part located outside the second rupture guiding line 31 is clamped in the clamping position and will not fall into the storage tank, and the part of the rupture area 311 located inside the second rupture guiding line 31 will not fall into the storage tank because it is connected to the support disk 2, thus avoiding the rupture disk 3 from falling into the storage tank. Moreover, since the second rupture guiding line 31 is connected end to end, when the rupture disk 3 ruptures along the second rupture guiding line 31, a relatively large rupture opening will be formed on the rupture disk 3, which is beneficial to the release of the negative pressure in the storage tank. In some embodiments, the second rupture guiding line 31 is circular and extends along the circumferential direction of the rupture disk 3.

[0042] Referring to Figures 1 - 3 As shown, in some embodiments, the clamping assembly 1 includes a first fixing ring 11, a second fixing ring 12 and a fastener 13. The first fixing ring 11 is used to connect with the storage tank. The second fixing ring 12 is arranged at a relative interval with the first fixing ring 11 along the axial direction of the first fixing ring 11. The fastener 13 is used to fasten the first fixing ring 11 and the second fixing ring 12 so that the interval between the first fixing ring 11 and the second fixing ring 12 forms a clamping position. When the support disk 2 and the rupture disk 3 are clamped between the first fixing ring 11 and the second fixing ring 12, the rupture disk 3 hermetically covers the inner space of the ring of the first fixing ring 11. Both the first fixing ring 11 and the second fixing ring 12 are circular rings. The first fixing ring 11 and the second fixing ring 12 are fixed by the fastener 13, and the support disk 2 and the rupture disk 3 are clamped between the first fixing ring 11 and the second fixing ring 12. Both the first fixing ring 11 and the second fixing ring 12 are circular rings, and both the support disk 2 and the rupture disk 3 are clamped in the inner space of the rings of the first fixing ring 11 and the second fixing ring 12. The first fixing ring 11 and the second fixing ring 12 are coaxially arranged, and the inner ring diameter of the first fixing ring 11 is equal to the inner ring diameter of the second fixing ring 12, which is convenient for clamping and fixing the support disk 2 and the rupture disk 3. The outer ring diameter of the first fixing ring 11 and the outer ring diameter of the second fixing ring 12 may be equal or may not be equal.

[0043] In some embodiments, a plurality of fasteners 13 are provided, and the plurality of fasteners 13 are arranged at intervals along the circumference of the first fixed ring sheet 11 to form a plurality of clamping points in the clamping position. The position of one fastener 13 corresponds to one clamping point. In order to provide a balanced clamping force to the support sheet 2 and the bursting sheet 3, the plurality of fasteners 13 are arranged at equal intervals along the circumference of the first fixed ring. The number of fasteners 13 is equal to the number of clamping points formed, the number of first rupture guide lines 21 arranged in a star shape is equal to the number of fasteners 13, and the vertex position of the star shape corresponds to the arrangement position of the fasteners 13 to strengthen the tearing stress.

[0044] In some embodiments, the fastener 13 is a fastening bolt, a screw, etc., and the fastener 13 is locked and fixed by a nut.

[0045] It should be noted that in the present invention, the set value of the negative pressure in the storage tank can be adjusted according to the use requirements of the storage tank by changing the number of fasteners 13, changing the surface roughness of the first fixed ring plate 11 and the second fixed ring plate, changing the arrangement of the second rupture guide line, etc. Among them, the number of fasteners 13 will change the pre-tightening force of the bursting disc 3, so that the bursting disc 3 is not easy to loosen and explode from the clamping state; the second rupture guide line can change the blasting pressure by length, depth of grain, shape of pattern, form of guided blasting, etc. For example, if you want to reduce the negative pressure setting value, you can reduce the number of fasteners 13, increase the smoothness of the first fixed ring plate and the second fixed ring plate 12, which is more conducive to the bursting disc 3 being forced out; at the same time, increasing the number and length of the second rupture guide line and deepening the depth of the second rupture guide line will effectively reduce the blasting pressure.

[0046] See also Figure 5 As shown, the utility model also provides a storage tank, comprising a tank body 200 and the negative pressure bursting disc device 100 for a storage tank as described above, wherein the clamping assembly 1 is connected to the top of the tank body 200. An opening 201 communicating with the inside of the tank body 200 is provided at the top of the tank body 200, and the clamping assembly 1 is installed at the opening 201 of the tank body 200, and the opening 201 is sealed by the bursting disc 3 to ensure the sealing inside the tank body 200, and to avoid the destruction of the cleanliness inside the tank body 200 due to the gas flow or leakage inside and outside the tank body 200. When the negative pressure inside the tank body 200 reaches the set value, the bursting disc 3 and the support disc 2 rupture, so that the opening 201 is connected to the outside, the negative pressure inside the tank body 200 is released, and the safety hazards such as deformation and rupture of the tank body 200 are avoided. After the negative pressure inside the storage tank is released, the support disc 2 and the bursting disc 3 can be replaced to ensure the normal use of the storage tank.

[0047] See also Figure 6As shown, in some embodiments, the clamping assembly 1 of the negative pressure rupture disc device 100 for the storage tank can also be connected to the side wall of the tank body 200. An opening 201 is formed in the side wall of the tank body 200, and the clamping assembly 1 is installed at the opening 201.

[0048] It should be noted that the first fixed ring plate 11 of the clamping assembly 1 is connected to the tank body 200, and the two can be fixed by welding or bolt connection under the condition of ensuring sealing.

[0049] It should be noted that when the clamping assembly 1 is connected to the top of the tank body 200, the central axes of the first fixed ring plate 11 and the second fixed ring plate 12 are arranged parallel to the central axis of the tank body 200. When the clamping assembly 1 is connected to the side wall of the tank body 200, the central axes of the first fixed ring plate 11 and the second fixed ring plate 12 are arranged perpendicular to the central axis of the tank body 200.

[0050] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A negative pressure bursting disc device for a storage tank, characterized in that: include: A clamping assembly, used for connecting with the storage tank, wherein the clamping assembly is provided with a clamping position; A support sheet, the edge of which is at least partially clamped by the clamping assembly in the clamping position, the support sheet is provided with a first rupture guide line, and the strength of the first rupture guide line is less than the strength of the support sheet; as well as A bursting disc, wherein the edge of the bursting disc is clamped in the clamping position by the clamping assembly, the bursting disc is stacked with the support disc, and the bursting disc is at least partially connected to the support disc, and a second rupture guide line is provided on the bursting disc, and the strength of the second rupture guide line is less than the strength of the bursting disc; When the support piece ruptures along the first rupture guide line, the bursting piece ruptures along the second rupture guide line and remains connected to the support piece, so that the inside and outside of the storage tank are connected.

2. The negative pressure bursting disc device for a storage tank according to claim 1, characterized in that: The support piece and the bursting piece are both arched, and when the clamping assembly is connected to the storage tank, the concave surfaces of the support piece and the bursting piece are both arranged toward the inside of the storage tank.

3. The negative pressure bursting disc device for a storage tank according to claim 2, characterized in that: The support piece and the bursting piece are arranged in sequence along the air inlet direction of the storage tank.

4. The negative pressure bursting disc device for a storage tank according to claim 1, characterized in that: There are multiple first rupture guide lines, and the multiple first rupture guide lines are arranged in a star shape; the clamping position is provided with multiple clamping points, and the vertex position of the star matches the position of the clamping point.

5. The negative pressure bursting disc device for a storage tank according to claim 4, characterized in that: The bursting piece is crimped and fixed to the supporting piece, and the crimping point between the bursting piece and the supporting piece is located at the corner position of the star shape.

6. The negative pressure bursting disc device for a storage tank according to claim 1, characterized in that: The second rupture guide wire is connected end to end on the bursting piece to enclose a bursting area, and the connection position between the bursting piece and the supporting piece is located in the bursting area.

7. The negative pressure bursting disc device for a storage tank according to claim 6, characterized in that: The second rupture guide line is circular and extends along the circumference of the bursting disc.

8. The negative pressure bursting disc device for a storage tank according to claim 1, characterized in that: The clamping assembly includes a first fixed ring piece, a second fixed ring piece and a fastener, the first fixed ring piece is used to be connected to the storage tank, the second fixed ring piece and the first fixed ring piece are arranged relatively spaced apart along the axial direction of the first fixed ring piece, and the fastener is used to fasten the first fixed ring piece and the second fixed ring piece so that the interval between the first fixed ring piece and the second fixed ring piece forms a clamping position.

9. The negative pressure bursting disc device for a storage tank according to claim 8, characterized in that: There are a plurality of fasteners, and the plurality of fasteners are arranged at intervals along the circumference of the first fixing ring piece to form a plurality of clamping points in the clamping position.

10. A storage tank, characterized in that: It comprises a tank body and a negative pressure bursting disc device for a storage tank as claimed in any one of claims 1 to 9, wherein the clamping assembly is connected to the top or side wall of the tank body.

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