Protection device for flame detection optical fiber lighting head

Abstract

The protection device comprises a protection cover body, a cooling piece and a light gathering piece, the protection cover body comprises an opening section, a protection section and a closed section which are connected in sequence, the opening section is used for being arranged on the flame detection optical fiber lighting head in a sleeving mode so that the flame detection optical fiber lighting head can be arranged in a protection cavity defined by the protection section, and the cooling piece is arranged in the protection cavity. The closed section is made of a light-transmitting material, the cooling piece is provided with a cooling outlet, and the cooling outlet is communicated with the protection cavity so as to be used for introducing cooling gas into the protection cavity. The light gathering piece is connected with the protective cover body and located in the protective cavity, and the light gathering piece is located between the flame detection optical fiber lighting head and the closed section in the length direction of the protective cover body. The protection device for the flame detection optical fiber daylighting head can prevent the optical fiber daylighting head from being damaged by heating, the service life of the optical fiber daylighting head is prolonged, and the detection effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal stove detection, in particular to a protection device for a fire detection optical fiber skylighting head. Background Art

[0002] In the related art, the optical fiber light-collecting head in the boiler furnace is basically directly inserted into the furnace through the casing, and the optical fiber light-collecting head inserted into the furnace is basically level with the end of the casing, which makes the fire detection casing easy to deform after being heated. In addition, when the fire detection cooling air supply is insufficient, the detection end of the fire detection optical fiber directly facing the heat source will also cause heat damage to the optical fiber end face; the optical fiber will also be affected by the positive pressure of the boiler and other factors, which will also reduce the light intensity transmitted by the optical fiber. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, an embodiment of the present invention provides a protective device for a fire detection optical fiber light-collecting head, which can prevent the optical fiber light-collecting head from being damaged by heat, and improve the service life and detection effect of the optical fiber light-collecting head.

[0004] The protective device for a fire detection optical fiber light-collecting head according to an embodiment of the present invention comprises:

[0005] A protective cover body, the protective cover body comprising an opening section, a protective section and a closed section which are connected in sequence, the opening section being used to be sleeved on the fire detection optical fiber light-collecting head so that the fire detection optical fiber light-collecting head is placed in a protective chamber surrounded by the protective section, and the closed section is made of a light-transmitting material;

[0006] A cooling member, wherein the cooling member has a cooling outlet, and the cooling outlet is communicated with the protection chamber so as to pass cooling gas into the protection chamber;

[0007] A light focusing piece is connected to the protective cover body and is located in the protective chamber. The light focusing piece is located between the fire detection optical fiber light-collecting head and the closed section in the length direction of the protective cover body.

[0008] The protection device for the fire detection optical fiber light-collecting head of the embodiment of the present invention can not only protect the part of the fire detection optical fiber light-collecting head extending into the furnace by using the protection cover body, so as to prevent the fire detection optical fiber light-collecting head from being damaged by heat. In addition, a focusing member is arranged on the front side of the fire detection optical fiber light-collecting head so as to more accurately capture the optical signal of the furnace flame, and the protection cover body can be cooled by using the cooling member, so as to further improve the service life of the protection device.

[0009] In some embodiments, the protective device for the fire detection fiber optic light-collecting head of the embodiment of the present invention further includes a sealing gasket, which is installed on the side wall of the fire detection fiber optic light-collecting head, and the opening section is sleeved on the sealing gasket.

[0010] In some embodiments, the opening section includes a first connecting section and a second connecting section, the second connecting section is connected to the protective section, the first connecting section and the second connecting section are detachably connected, and the first connecting section and the second connecting section are movable along the length direction of the protective cover body.

[0011] In some embodiments, the first connecting section includes a first connecting body and a first extending portion, the first extending portion is connected to the first connecting body and extends toward the second connecting section, there are a plurality of first extending portions, and the plurality of first extending portions are arranged at intervals along the circumference of the fire detection optical fiber light collecting head.

[0012] The second connecting section includes a second connecting body and a second extending portion, the second extending portion is connected to the second connecting body and extends toward the first connecting section, there are a plurality of second extending portions, and the plurality of second extending portions are arranged at intervals along the circumference of the fire detection optical fiber light-collecting head.

[0013] In the circumferential direction of the fire detection optical fiber light-collecting head, the first extension part and the second extension part are arranged in sequence and spaced apart.

[0014] In some embodiments, the outer peripheral walls of the first connecting section and the second connecting section are both provided with external threads, and the first connecting section and the second connecting section are connected by a plurality of nuts.

[0015] In some embodiments, in a plane orthogonal to the length direction of the protective cover body, the cross-sectional size of the protective segment gradually increases in a direction from the opening segment to the closed segment.

[0016] In some embodiments, the cooling member includes a first cooling pipeline and a second cooling pipeline, the first cooling pipeline is connected to the outer wall of the protection section, the second cooling pipeline is an annular pipeline, and the second cooling pipeline is connected to the inner wall of the protection section, the first cooling pipeline is connected to the second cooling pipeline, and the cooling outlet is arranged on the second cooling pipeline.

[0017] In some embodiments, there are multiple cooling outlets, and the multiple cooling outlets are arranged at intervals in the extension direction of the second cooling pipeline.

[0018] In some embodiments, the light focusing element is a convex lens, and a mounting groove is provided on the inner wall surface of the protection section. The mounting groove is annular and is adapted to the light focusing element.

[0019] In some embodiments, the protection device for the fire detection fiber optic light-collecting head of the embodiment of the present invention further includes a protective member, wherein the protective member is disposed in the installation groove, and the focusing member is installed in the installation groove and abuts against the protective member. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of a protection device for a fire detection optical fiber light-collecting head according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 An enlarged schematic diagram of A is shown in FIG.

[0022] Figure 3 It is a schematic structural diagram of a protection device for a fire detection optical fiber light-collecting head according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100. Fire detection optical fiber lighting head,

[0025] 1. Protective cover body,

[0026] 11. opening section, 111. first connecting section, 1111. first connecting body, 1112. first extending portion, 112. second connecting section, 1121. second connecting body, 1122. second extending portion,

[0027] 12. protection section, 121. protection chamber, 122. mounting groove,

[0028] 13. Closed section,

[0029] 2. Cooling element, 21. First cooling pipe,

[0030] 3. Focusing parts,

[0031] 4. Sealing gasket,

[0032] 5. Protective parts. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figure 1-Figure 3 As shown, the protection device for the fire detection optical fiber light collecting head 100 according to the embodiment of the present invention comprises: a protection cover body 1, a cooling element 2 and a focusing element 3.

[0035] The protective cover body 1 includes an opening section 11, a protective section 12 and a closed section 13 which are connected in sequence. The opening section 11 is used to be mounted on the fire detection fiber optic light-collecting head 100 so that the fire detection fiber optic light-collecting head 100 is placed in a protective chamber 121 surrounded by the protective section 12. The closed section 13 is made of a light-transmitting material. The cooling member 2 has a cooling outlet which is connected to the protective chamber 121 to allow cooling gas to be introduced into the protective chamber 121. The focusing member 3 is connected to the protective cover body 1 and is located in the protective chamber 121. The focusing member 3 is arranged in the length direction of the protective cover body 1 (such as Figure 1 In the left and right direction (in the middle), it is located between the fire detection fiber optic lighting head 100 and the closed section 13.

[0036] Specifically, Figure 1-Figure 3 As shown, the opening section 11, the protection section 12 and the closed section 13 are connected in sequence from left to right, and the opening section 11 and the right end of the fire detection fiber optic light-collecting head 100 can be connected by plugging or threading to ensure the connection strength between the protection cover body 1 and the fire detection fiber optic light-collecting head 100, while also ensuring a certain degree of sealing between the two to prevent impurities in the furnace from entering the protection chamber 121 of the protection cover body 1.

[0037] It is understandable that the closed section 13 can be made of a boiler sight glass made of special glass to avoid changes in its own structure in the boiler furnace. Of course, it can also be made of other materials that can withstand high temperature, high pressure and corrosion, such as sapphire materials. The cooling element 2 can pass compressed air into the protection chamber 121, and while cooling the protection chamber 121, it can also form a positive pressure in the protection chamber 121, thereby preventing dust and other impurities in the furnace from entering the protection chamber 121 through the connection gap between the protective shell and the fire detection optical fiber lighting head 100, thereby improving the light transmittance of the optical fiber.

[0038] In some embodiments, the light concentrator 3 may be a convex lens, and a mounting groove 122 is provided on the inner wall surface of the protection section 12. The mounting groove 122 is annular and is adapted to the light concentrator 3. It is understandable that Figure 1 and Figure 2 As shown, the edge of the light collecting member 3 can be snapped into the mounting groove 122 to fix the light collecting member 3.

[0039] Optionally, the protective device for the fire detection optical fiber light-collecting head 100 of the embodiment of the present invention further includes a protective member 5, which is arranged in the mounting groove 122, and the light focusing member 3 is installed in the mounting groove 122 and abuts against the protective member 5. Preferably, the protective member 5 can be made of rubber material to prevent the light focusing member 3 from being installed in the mounting groove 122 and abutting against the protective member 5, thereby ensuring the safety of the light focusing member 3, avoiding collision or friction between the light focusing member 3 and the wall surface of the mounting groove 122, and thus ensuring the integrity of the light focusing member 3.

[0040] Therefore, the protection device for the fire detection optical fiber light-collecting head 100 of the embodiment of the present invention can not only use the protection cover body 1 to protect the part of the fire detection optical fiber light-collecting head 100 extending into the furnace to prevent the fire detection optical fiber light-collecting head 100 from being damaged by heat. In addition, a focusing member 3 is arranged on the front side of the fire detection optical fiber light-collecting head 100 to more accurately capture the optical signal of the furnace flame, and the cooling member 2 can be used to cool the protection cover body 1, further improving the service life of the protection device.

[0041] In some embodiments, the protective device for the fire detection fiber optic light source 100 of the embodiment of the present invention further includes a sealing gasket 4, which is installed on the side wall of the fire detection fiber optic light source 100, and the opening section 11 is mounted on the sealing gasket 4.

[0042] Specifically, Figure 1 As shown, the sealing gasket 4 is mounted on the outer wall of the fire detection fiber optic light-collecting head 100, and the opening section 11 is installed on the sealing gasket 4, so that the sealing gasket 4 is in close contact with the outer wall of the fire detection fiber optic light-collecting head 100. At the same time, the outer wall of the sealing gasket 4 can be in close contact with the opening section 11, thereby improving the sealing between the protective cover body 1 and the fire detection fiber optic light-collecting head 100.

[0043] Preferably, the inner diameter of the sealing gasket 4 is smaller than or equal to the outer diameter of the fire detection fiber optic light-collecting head 100, and the inner diameter of the opening section 11 is smaller than or equal to the outer diameter of the sealing gasket 4, thereby ensuring that the sealed power supply and the fire detection fiber optic light-collecting head 100 as well as the opening section 11 and the sealing gasket 4 are all interference fits.

[0044] In some embodiments, the opening section 11 includes a first connecting section 111 and a second connecting section 112, the second connecting section 112 is connected to the protective section 12, the first connecting section 111 and the second connecting section 112 are detachably connected, and the first connecting section 111 and the second connecting section 112 are movable along the length direction of the protective cover body 1.

[0045] Specifically, Figure 1 and Figure 3 As shown, the second connecting section 112 is connected between the first connecting section 111 and the protective section 12, and the first connecting section 111 and the second connecting section 112 can move relative to each other in the left-right direction. Preferably, the second connecting section 112 and the protective section 12 are integrally formed.

[0046] It can be understood that the first connecting section 111 and the second connecting section 112 are movable in the left-right direction, that is, after the first connecting section 111 and the second connecting section 112 are mounted on the sealing gasket 4, the distance between the light focusing member 3 and the fire detection optical fiber light collecting head 100 is adjusted according to the optical signal of the flame collected in the furnace by the fire detection optical fiber light collecting head 100. In other words, by moving the second connecting section 112 in the left-right direction, the distance between the light focusing member 3 and the fire detection optical fiber light collecting head 100 can be adjusted, thereby ensuring the signal collected by the fire detection optical fiber light collecting head 100, and after the second connecting section 112 is moved, the second connecting member is connected to the first connecting member to improve the connection strength of the protective cover body 1.

[0047] Optionally, the first connecting section 111 includes a first connecting body 1111 and a first extension portion 1112, the first extension portion 1112 is connected to the first connecting body 1111 and extends toward the second connecting section 112, there are multiple first extension portions 1112, and the multiple first extension portions 1112 are arranged at intervals along the circumference of the fire detection fiber optic light-collecting head 100, the second connecting section 112 includes a second connecting body 1121 and a second extension portion 1122, the second extension portion 1122 is connected to the second connecting body 1121 and extends toward the first connecting section 111, there are multiple second extension portions 1122, and the multiple second extension portions 1122 are arranged at intervals along the circumference of the fire detection fiber optic light-collecting head 100, and on the circumference of the fire detection fiber optic light-collecting head 100, the first extension portion 1112 and the second extension portion 1122 are arranged in sequence at intervals.

[0048] It is understandable that if Figure 1 and Figure 3 As shown, the first extension portion 1112 extends to the right side of the first connection body 1111, and the second extension portion 1122 extends to the left side of the second connection body 1121. In the circumferential direction of the fire detection optical fiber light-collecting head 100, multiple first extension portions 1112 and multiple second extension portions 1122 are alternately arranged in sequence, so that the first connection segment 111 and the second connection segment 112 cannot rotate relative to each other, thereby preventing the second connection segment 112 from being adjusted in the left and right directions and ensuring that the protective cover body 1 itself cannot rotate.

[0049] Optionally, the outer peripheral walls of the first connecting section 111 and the second connecting section 112 are both provided with external threads, and the first connecting section 111 and the second connecting section 112 are connected by a plurality of nuts. Figure 1 and Figure 3 As shown, the external threads arranged on the outer peripheral walls of the first connecting segment 111 and the second connecting segment 112 are of the same specification, whereby a plurality of matching nuts on the first connecting segment 111 and the second connecting segment 112 can be fixed in a plurality of combinations to ensure the connection strength between the first connecting segment 111 and the second connecting segment 112.

[0050] In some embodiments, in a plane orthogonal to the length direction of the protective cover body 1 , the cross-sectional size of the protective segment 12 gradually increases in a direction from the opening segment 11 to the closed segment 13 .

[0051] It is understandable that if Figure 1 As shown, in a plane orthogonal to the left and right directions, the cross-sectional area of ​​the protection segment 12 gradually increases from left to right, so that the protection chamber 121 has sufficient installation space, ensuring the installation of the focusing element 3, and also providing sufficient cooling space for the fire detection fiber optic light source 100, thereby improving the cooling effect.

[0052] In some embodiments, the cooling member 2 includes a first cooling pipe 21 and a second cooling pipe, the first cooling pipe 21 is connected to the outer wall of the protection section 12, the second cooling pipe is an annular pipe, and the second cooling pipe is connected to the inner wall of the protection section 12, the first cooling pipe 21 is connected to the second cooling pipe, and the cooling outlet is arranged on the second cooling pipe.

[0053] It can be understood that the cooling member 2 also includes an air compression pump (not shown in the figure), which is connected to one end of the first cooling pipe 21, the other end of the first cooling pipe 21 is connected to the protection section 12 and passes through the protection section 12, and the second cooling pipe is connected to the first cooling pipe 21, so that the air compression pump can transport compressed air to the protection chamber 121 through the first cooling pipe 21 and the second cooling pipe, thereby realizing cooling treatment of the protection chamber 121.

[0054] Preferably, there are multiple cooling outlets, and the multiple cooling outlets are arranged at intervals in the extension direction of the second cooling pipeline. It can be understood that the second cooling pipeline is arranged along the circumference of the fire detection fiber optic light-collecting head 100 and around the fire detection fiber optic light-collecting head 100, so that the multiple cooling outlets on the second cooling pipeline can discharge compressed air in different directions, further ensuring the cooling effect.

[0055] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A protective device for a fire detection optical fiber lighting head, characterized in that: include: A protective cover body, the protective cover body comprising an opening section, a protective section and a closed section which are connected in sequence, the opening section being used to be sleeved on the fire detection optical fiber light-collecting head so that the fire detection optical fiber light-collecting head is placed in a protective chamber surrounded by the protective section, and the closed section is made of a light-transmitting material; A cooling member, wherein the cooling member has a cooling outlet, and the cooling outlet is communicated with the protection chamber so as to pass cooling gas into the protection chamber; A light focusing piece is connected to the protective cover body and is located in the protective chamber. The light focusing piece is located between the fire detection optical fiber light-collecting head and the closed section in the length direction of the protective cover body.

2. The protective device for a fire detection optical fiber lighting head according to claim 1, characterized in that: It also includes a sealing gasket, which is installed on the side wall of the fire detection fiber optic lighting head, and the opening section is sleeved on the sealing gasket.

3. The protective device for a fire detection optical fiber lighting head according to claim 1, characterized in that: The opening section includes a first connecting section and a second connecting section, the second connecting section is connected to the protection section, the first connecting section and the second connecting section are detachably connected, and the first connecting section and the second connecting section are movable along the length direction of the protection cover body.

4. The protective device for a fire detection optical fiber lighting head according to claim 3, characterized in that: The first connecting section includes a first connecting body and a first extending portion, the first extending portion is connected to the first connecting body and extends toward the second connecting section, there are a plurality of first extending portions, and the plurality of first extending portions are arranged at intervals along the circumference of the fire detection optical fiber light collecting head, The second connecting section includes a second connecting body and a second extending portion, the second extending portion is connected to the second connecting body and extends toward the first connecting section, there are a plurality of second extending portions, and the plurality of second extending portions are arranged at intervals along the circumference of the fire detection optical fiber light-collecting head. In the circumferential direction of the fire detection optical fiber light-collecting head, the first extension part and the second extension part are arranged in sequence and spaced apart.

5. The protective device for a fire detection optical fiber lighting head according to claim 4, characterized in that: The outer peripheral walls of the first connecting section and the second connecting section are both provided with external threads, and the first connecting section and the second connecting section are connected by a plurality of nuts.

6. The protective device for a fire detection optical fiber lighting head according to claim 1, characterized in that: In a plane orthogonal to the length direction of the protection cover body, the cross-sectional size of the protection segment gradually increases in a direction from the opening segment to the closed segment.

7. The protective device for a fire detection optical fiber lighting head according to claim 6, characterized in that: The cooling component includes a first cooling pipeline and a second cooling pipeline, the first cooling pipeline is connected to the outer wall of the protection section, the second cooling pipeline is an annular pipeline, and the second cooling pipeline is connected to the inner wall of the protection section, the first cooling pipeline is connected to the second cooling pipeline, and the cooling outlet is arranged on the second cooling pipeline.

8. The protective device for a fire detection optical fiber lighting head according to claim 7, characterized in that: There are a plurality of cooling outlets, and the plurality of cooling outlets are arranged at intervals in the extending direction of the second cooling pipeline.

9. The protective device for a fire detection optical fiber lighting head according to claim 8, characterized in that: The light concentrator is a convex lens, and a mounting groove is provided on the inner wall surface of the protection section. The mounting groove is annular and is adapted to the light concentrator.

10. The protective device for a fire detection optical fiber lighting head according to claim 9, characterized in that: It also includes a protective member, which is arranged in the installation groove, and the focusing member is installed in the installation groove and abuts against the protective member.

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