CN212564434U - Fire prevention valve with elastic component - Google Patents
Fire prevention valve with elastic component Download PDFInfo
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- CN212564434U CN212564434U CN202021185972.XU CN202021185972U CN212564434U CN 212564434 U CN212564434 U CN 212564434U CN 202021185972 U CN202021185972 U CN 202021185972U CN 212564434 U CN212564434 U CN 212564434U
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- arc
- elastic metal
- side wall
- shaped elastic
- valve body
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- 230000002265 prevention Effects 0.000 title abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 130
- 229910052751 metal Inorganic materials 0.000 claims abstract description 130
- 230000000694 effects Effects 0.000 claims abstract description 18
- 230000000670 limiting effect Effects 0.000 claims description 48
- 230000006978 adaptation Effects 0.000 claims description 4
- 235000019504 cigarettes Nutrition 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The utility model relates to a fire prevention valve with elastic component, this fire prevention valve includes: the valve body is provided with a first inner side wall and a second inner side wall which are oppositely arranged, a first arc-shaped elastic metal part is arranged on the first inner side wall, and a second arc-shaped elastic metal part is arranged on the second inner side wall; the first end of each rotating shaft penetrates through a first through hole to be rotatably connected with the first inner side wall of the valve body, the second end of each rotating shaft penetrates through a second through hole to be rotatably connected with the second inner side wall of the valve body, the rotating shafts are arranged in parallel, each rotating shaft is provided with a blade, and two side walls of each blade are movably abutted to the highest position of the first arc-shaped elastic metal part and the highest position of the second arc-shaped elastic metal part respectively; through rotating the blade for two lateral walls of blade can effectively improve the effect that separates the cigarette back-fire relief with the highest point activity butt of first arc elastic metal spare and second arc elastic metal spare respectively, can effectively avoid the blade to block moreover, improve the security.
Description
Technical Field
The utility model relates to a fire-proof equipment technical field especially relates to a fire prevention valve with elastic component.
Background
The fire damper is installed in an air duct system of the air conditioner, and when a fire disaster occurs, the fire damper is closed to seal an air duct, so that the effects of smoke isolation and fire resistance are achieved.
For guaranteeing fire behavior, the valve body and the blade of fire prevention valve all adopt the PLASTIC LAMINATED preparation, and the valve body of turning over the board formula fire prevention valve is the frame shape, and the blade passes through the rotatable installation of the pivot that sets up in the middle of the both sides on the inside wall of valve body, and pivot and bearing support are on the valve body, and the blade passes through its rotation of actuating mechanism drive for mutual butt between the blade, in order to reach sealed effect. However, if the blade is close to the inner side wall of the frame, although the sealing performance of the fire damper can be ensured, the blade is difficult to rotate, and the blade is easily clamped by the valve body, so that the fire damper cannot be normally closed. If activity space is reserved between the blades and the frame body, the blades can be conveniently rotated, the blades are prevented from being clamped, but the sealing performance is low, and therefore the effect of smoke isolation and fire resistance cannot be achieved.
Disclosure of Invention
Based on this, there is a need for a fire damper having a resilient member.
In one embodiment, a fire damper having a resilient member, the fire damper comprising: the valve body is provided with a first inner side wall and a second inner side wall, the first inner side wall and the second inner side wall are arranged oppositely, a first arc-shaped elastic metal part is arranged on the first inner side wall, a second arc-shaped elastic metal part is arranged on the second inner side wall, a plurality of first through holes are formed in the first arc-shaped elastic metal part, and a plurality of second through holes are formed in the second arc-shaped elastic metal part; a plurality of pivots, each the first end of pivot passes one first through-hole with the first inside wall of valve body rotates to be connected, each the second end of pivot passes one the second through-hole with the second inside wall of valve body rotates to be connected, a plurality of pivot parallel arrangement each be provided with the blade in the pivot, two lateral walls of blade respectively with the highest point of first arc elastic metal spare reaches the activity butt of the highest point of second arc elastic metal spare, first through-hole reach the second through-hole respectively with pivot looks adaptation.
In one embodiment, the first arc-shaped elastic metal piece is fixedly connected with a first inner side wall of the valve body; the second arc-shaped elastic metal piece is fixedly connected with the second inner side wall of the valve body.
In one embodiment, the first arc-shaped elastic metal piece is an arc-shaped elastic metal sheet.
In one embodiment, be provided with first stopper and second stopper on the first inside wall, first stopper with the mutual parallel arrangement of second stopper, first stopper has first lateral wall, the second stopper has the second lateral wall, first lateral wall and second lateral wall set up relatively, the both sides of first arc elastic metal spare respectively with first lateral wall and with the second lateral wall butt.
In one embodiment, the first limit block and the valve body are integrally formed, and the second limit block and the valve body are integrally formed.
In one embodiment, the second arc-shaped elastic metal piece is an arc-shaped elastic metal sheet.
In one embodiment, a third limiting block and a fourth limiting block are arranged on the second inner side wall, the third limiting block and the fourth limiting block are arranged in parallel, the third limiting block is provided with a third side wall, the fourth limiting block is provided with a fourth side wall, the third side wall and the fourth side wall are arranged oppositely, and two sides of the second arc-shaped elastic metal part are respectively abutted to the third side wall and the fourth side wall.
In one embodiment, the third limiting block is integrally formed with the valve body, and the fourth limiting block is integrally formed with the valve body.
In one embodiment, any two adjacent rotating shafts are spaced at equal intervals.
In one embodiment, the blade is integrally formed with the shaft.
According to the fire damper with the elastic part, the first arc-shaped elastic metal part and the second arc-shaped elastic metal part are respectively arranged on the two inner side walls of the valve body, and the two side walls of the blade are respectively movably abutted against the highest positions of the first arc-shaped elastic metal part and the second arc-shaped elastic metal part by rotating the blade; when the valve is closed, the two side walls of the blade are respectively abutted to the highest points of the first arc-shaped elastic metal part and the second arc-shaped elastic metal part, and the side walls of the blade can be better attached to the highest points of the arc-shaped elastic metal parts due to the elasticity of the arc-shaped elastic metal parts, so that a better sealing effect is achieved, and the sealing performance of the fire-proof valve is guaranteed; when the valve is opened, the two side walls of the blade are separated from the first arc-shaped elastic metal part and the second arc-shaped elastic metal part, so that the blade can rotate, and the blade is prevented from being clamped.
Drawings
FIG. 1 is a schematic perspective view of a fire damper with an elastic member according to the present invention;
FIG. 2 is a schematic view of another embodiment of the fire damper with an elastic member according to the present invention;
fig. 3 is a sectional view taken along the direction B-B in fig. 2.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
For example, there is provided a fire damper having an elastic member, the fire damper including: the valve body is provided with a first inner side wall and a second inner side wall, the first inner side wall and the second inner side wall are arranged oppositely, a first arc-shaped elastic metal part is arranged on the first inner side wall, a second arc-shaped elastic metal part is arranged on the second inner side wall, a plurality of first through holes are formed in the first arc-shaped elastic metal part, and a plurality of second through holes are formed in the second arc-shaped elastic metal part; a plurality of pivots, each the first end of pivot passes one first through-hole with the first inside wall of valve body rotates to be connected, each the second end of pivot passes one the second through-hole with the second inside wall of valve body rotates to be connected, a plurality of pivot parallel arrangement each be provided with the blade in the pivot, two lateral walls of blade respectively with the highest point of first arc elastic metal spare reaches the activity butt of the highest point of second arc elastic metal spare, first through-hole reach the second through-hole respectively with pivot looks adaptation.
Above-mentioned fire prevention valve with elastic component sets up first arc elastic metal spare and second arc elastic metal spare respectively through two inside walls at the valve body, through rotor blade for two lateral walls of blade respectively with first arc elastic metal spare and second arc elastic metal spare's highest point activity butt. When the valve is closed, the two side walls of the blade are respectively abutted to the highest points of the first arc-shaped elastic metal part and the second arc-shaped elastic metal part, and the side walls of the blade can be better attached to the highest points of the arc-shaped elastic metal parts due to the elasticity of the arc-shaped elastic metal parts, so that a better sealing effect is achieved, and the sealing performance of the fire-proof valve is guaranteed; when the valve is opened, the two side walls of the blade are separated from the first arc-shaped elastic metal part and the second arc-shaped elastic metal part, so that the blade can rotate, and the blade is prevented from being clamped. That is to say, the fire prevention valve of this application can effectively improve and separate the effect of cigarette back-fire relief, can effectively avoid the blade to block moreover, improves the security.
Referring to fig. 1 and 2, in one embodiment, a fire damper with a resilient member includes: the valve body 100 is provided with a first inner side wall 110 and a second inner side wall 120, the first inner side wall 110 and the second inner side wall 120 are arranged oppositely, a first arc-shaped elastic metal part 210 is arranged on the first inner side wall 110, a second arc-shaped elastic metal part 220 is arranged on the second inner side wall 120, a plurality of first through holes are formed in the first arc-shaped elastic metal part 210, and a plurality of second through holes are formed in the second arc-shaped elastic metal part 220; a plurality of pivots 300, each the first end of pivot 300 passes one first through-hole with the first inside wall 110 of valve body 100 rotates and is connected, each the second end of pivot 300 passes one the second through-hole with the second inside wall 120 of valve body 100 rotates and is connected, a plurality of pivots 300 mutual parallel arrangement, each be provided with blade 310 in the pivot 300, two lateral walls of blade 310 respectively with the highest point of first arc elastic metal spare 210 reaches the activity butt of the highest point of second arc elastic metal spare 220, first through-hole with the second through-hole respectively with pivot 300 looks adaptation.
Specifically, the two side walls of the blade 310 are movably abutted against the highest point of the first arc-shaped elastic metal member 210 and the highest point of the second arc-shaped elastic metal member 220, respectively, that is, the two side walls of the blade 310 are abutted against or separated from the highest point of the first arc-shaped elastic metal member 210 and the highest point of the second arc-shaped elastic metal member 220, respectively. It should be understood that when the fire damper is in a closed state, two side walls of the vane 310 abut against the highest point of the first arc-shaped elastic metal member 210 and the highest point of the second arc-shaped elastic metal member 220, respectively, to achieve a sealing effect, and when the fire damper is in an open state, two side walls of the vane 310 are separated from the highest points of the first arc-shaped elastic metal member 210 and the second arc-shaped elastic metal member 220, respectively, so that the vane 310 is not interfered by the arc-shaped elastic metal members when rotating, so as to facilitate the rotation of the vane 310.
It should be understood that the rotation connection manner adopted by the two ends of the rotating shaft 300 and the first inner side wall 110 and the second inner side wall 120 respectively is the prior art, which is not the focus of the present invention. The rotation of the shaft 300 to the valve body 100 can be accomplished by one skilled in the art according to conventional techniques in the art.
In this embodiment, the number of the first through holes is equal to the number of the second through holes, and the number of the first through holes is equal to the number of the rotating shafts.
In the fire damper, the two side walls of the blade 310 are movably abutted to the highest positions of the first arc-shaped elastic metal member 210 and the second arc-shaped elastic metal member 220 by rotating the blade 310; when the valve is closed, the two side walls of the blade 310 are respectively abutted to the highest points of the first arc-shaped elastic metal part 210 and the second arc-shaped elastic metal part 220, and due to the elasticity of the arc-shaped elastic metal parts, the side walls of the blade 310 can be better attached to the highest points of the arc-shaped elastic metal parts, so that a better sealing effect is achieved, and the sealing performance of the fire valve is guaranteed; when the valve is opened, the two sidewalls of the blade 310 are separated from the first arc-shaped elastic metal member 210 and the second arc-shaped elastic metal member 220, so that the blade 310 can rotate, and the blade 310 is prevented from being stuck.
In one embodiment, the first inner side wall is fixedly connected with the first inner side wall of the valve body; the second arc-shaped elastic metal piece is fixedly connected with the second inner side wall of the valve body. Specifically, through with arc elastic metal spare with the inside wall fixed connection of valve body, can avoid the blade to remove arc elastic metal spare at the rotation in-process to influence the sealed effect of fire prevention valve.
In one embodiment, the first arc-shaped elastic metal piece is an arc-shaped elastic metal sheet. Specifically, the first arc-shaped elastic metal part is set to be the arc-shaped elastic metal sheet, so that the using amount of metal in the first arc-shaped elastic metal part can be reduced, and the production and manufacturing cost is reduced. For example, the metal sheet is a stainless steel sheet. For another example, the metal sheet is an iron sheet.
Referring to fig. 1 and fig. 2, in one embodiment, a first limiting block 130 and a second limiting block 140 are disposed on the first inner side wall 110, the first limiting block 130 and the second limiting block 140 are disposed in parallel, the first limiting block 130 has a first side wall, the second limiting block 140 has a second side wall, the first side wall and the second side wall are disposed opposite to each other, and two sides of the first arc-shaped elastic metal member 210 are respectively abutted against the first side wall and the second side wall. In one embodiment, when the first resilient metal member is in a natural state, a distance between two sides of the first resilient metal member is greater than a distance between the first side wall and the second side wall. Specifically, through set up two stopper on the first inside wall 110 of valve body 100, the both sides of first arc elastic metal spare 210 respectively with first lateral wall and with the second lateral wall butt for being in bending deformation state of first arc elastic metal spare 210, thereby can avoid the outside expansion of first arc elastic metal spare. Since the rotating shaft 300 passes through the first passage, a limiting effect is achieved, and the first arc-shaped elastic metal part 210 is prevented from moving back and forth. Further, the side wall of the blade 310 abuts against the highest position of the first arc-shaped elastic metal member 210, so that the first arc-shaped elastic metal member 210 is prevented from sliding up and down. Therefore, the first arc-shaped elastic metal piece 210 can be fixedly arranged on the first inner side wall 110 by arranging the two limiting blocks, and the fire damper is convenient to install.
In one embodiment, the first limit block and the valve body are integrally formed, and the second limit block and the valve body are integrally formed.
In one embodiment, the second arc-shaped elastic metal piece is an arc-shaped elastic metal sheet. Specifically, the second arc-shaped elastic metal part is set to be the arc-shaped elastic metal sheet, so that the using amount of metal in the second arc-shaped elastic metal part can be reduced, and the production and manufacturing cost is reduced. For example, the metal sheet is a stainless steel sheet. For another example, the metal sheet is an iron sheet.
Referring to fig. 1 and 2, in one embodiment, a third limiting block 150 and a fourth limiting block 160 are disposed on the second inner side wall 120, the third limiting block 150 and the fourth limiting block 160 are disposed in parallel, the third limiting block 150 has a third side wall, the fourth limiting block 160 has a fourth side wall, the third side wall and the fourth side wall are disposed opposite to each other, and two sides of the second arc-shaped elastic metal member 220 are abutted to the third side wall and the fourth side wall, respectively. Specifically, the first arc-shaped elastic metal piece 210 can be fixedly arranged on the first inner side wall 110 by arranging two limit blocks, and the installation of the fire damper is convenient. The specific principle has been explained in detail above, and the detailed description of the implementation is omitted.
In one embodiment, the third stopper 150 is integrally formed with the valve body 100, and the fourth stopper 160 is integrally formed with the valve body 100. Specifically, the third stopper 150 and the fourth stopper 160 are integrally formed with the valve body 100, so that the production efficiency can be improved.
In one embodiment, any two adjacent rotating shafts are spaced at equal intervals.
In one embodiment, a first limiting block and a second limiting block are arranged on the first inner side wall, the first limiting block and the second limiting block are arranged in parallel, and the first limiting block and the second limiting block are arranged inside the first arc-shaped elastic metal part and movably abutted against the inner side wall of the first arc-shaped elastic metal part. In one embodiment, a third limiting block and a fourth limiting block are arranged on the second inner side wall, the third limiting block and the fourth limiting block are arranged in parallel, and the third limiting block and the fourth limiting block are arranged inside the second arc-shaped elastic metal part and movably abutted against the inner side wall of the second arc-shaped elastic metal part. Specifically, when the first arc-shaped elastic metal part is not subjected to external force, the width of the two sides of the first arc-shaped elastic metal part is greater than the distance between the first limiting block and the second limiting block, the first limiting block and the second limiting block are arranged inside the first arc-shaped elastic metal part, and the first limiting block, the second limiting block and the first arc-shaped elastic metal part are movably abutted to limit the first elastic metal part and prevent the first elastic metal part from moving left and right. And the blade is when extrudeing first elastic metal spare, because when the both sides of first elastic metal spare outwards expand, do not have the object to restrict it to make first elastic metal spare can deform better, take place the phenomenon of blocking with further avoiding the blade. So, can reach the effect that separates the cigarette back-fire relief equally through such mode of setting up, also can prevent that the blade card from leading to the unable normal rotation phenomenon of blade at first elastic metal spare. The setting principle of the second arc-shaped elastic metal part is the same as that of the first arc-shaped elastic metal part, and the description is omitted.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A fire damper having a resilient member, the fire damper comprising:
the valve body is provided with a first inner side wall and a second inner side wall, the first inner side wall and the second inner side wall are arranged oppositely, a first arc-shaped elastic metal part is arranged on the first inner side wall, a second arc-shaped elastic metal part is arranged on the second inner side wall, a plurality of first through holes are formed in the first arc-shaped elastic metal part, and a plurality of second through holes are formed in the second arc-shaped elastic metal part;
a plurality of pivots, each the first end of pivot passes one first through-hole with the first inside wall of valve body rotates to be connected, each the second end of pivot passes one the second through-hole with the second inside wall of valve body rotates to be connected, a plurality of pivot parallel arrangement each be provided with the blade in the pivot, two lateral walls of blade respectively with the highest point of first arc elastic metal spare reaches the activity butt of the highest point of second arc elastic metal spare, first through-hole reach the second through-hole respectively with pivot looks adaptation.
2. The fire damper with the elastic member according to claim 1, wherein the first arc-shaped elastic metal member is fixedly connected with a first inner side wall of the valve body; the second arc-shaped elastic metal piece is fixedly connected with the second inner side wall of the valve body.
3. The fire damper with resilient member of claim 1, wherein said first arcuate resilient metal member is an arcuate resilient metal sheet.
4. The fire damper with the elastic member according to claim 3, wherein a first stopper and a second stopper are disposed on the first inner sidewall, the first stopper and the second stopper are disposed in parallel, the first stopper has a first sidewall, the second stopper has a second sidewall, the first sidewall and the second sidewall are disposed opposite to each other, and two sides of the first arc-shaped elastic metal member are abutted to the first sidewall and the second sidewall, respectively.
5. The fire damper with elastic member of claim 4, wherein said first stopper is integrally formed with said valve body, and said second stopper is integrally formed with said valve body.
6. The fire damper with resilient member of claim 1, wherein said second arcuate resilient metal member is an arcuate resilient metal sheet.
7. The fire damper with the elastic member according to claim 6, wherein a third limiting block and a fourth limiting block are disposed on the second inner sidewall, the third limiting block and the fourth limiting block are disposed in parallel, the third limiting block has a third sidewall, the fourth limiting block has a fourth sidewall, the third sidewall and the fourth sidewall are disposed opposite to each other, and two sides of the second arc-shaped elastic metal member are abutted to the third sidewall and the fourth sidewall, respectively.
8. The fire damper with elastic member of claim 7, wherein said third stopper is integrally formed with said valve body, and said fourth stopper is integrally formed with said valve body.
9. The fire damper with a resilient member of claim 1, wherein any two adjacent shafts are equally spaced.
10. The fire damper with a resilient member of claim 1, wherein said vane is integrally formed with said shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021185972.XU CN212564434U (en) | 2020-06-23 | 2020-06-23 | Fire prevention valve with elastic component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021185972.XU CN212564434U (en) | 2020-06-23 | 2020-06-23 | Fire prevention valve with elastic component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212564434U true CN212564434U (en) | 2021-02-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021185972.XU Active CN212564434U (en) | 2020-06-23 | 2020-06-23 | Fire prevention valve with elastic component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212564434U (en) |
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2020
- 2020-06-23 CN CN202021185972.XU patent/CN212564434U/en active Active
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Effective date of registration: 20231007 Address after: B-5-1, Jinlu Industrial Park, 199 Haiyu Middle Line, Haikou City, Hainan Province, 570100 Patentee after: Hainan Xinshengyuan Air Conditioning and HVAC Engineering Co.,Ltd. Patentee after: Haikou Shengyuan fire fighting equipment Co.,Ltd. Address before: 570100 B-5, Jinlu Industrial Zone, 199 Haiyu midline, Xiuying District, Haikou City, Hainan Province Patentee before: Haikou Shengyuan fire fighting equipment Co.,Ltd. |