Closed firefighting sprinkler head

Abstract

A closed firefighting sprinkler head, relating to the technical field of closed sprinkler heads. The closed firefighting sprinkler head comprises a sprinkler head body, wherein a water spray port is provided at one end of the sprinkler head body, and the water spray port is configured to connect to a water pipe; the sprinkler head body further comprises a hollowed-out cavity, and the inside of the hollowed-out cavity is configured for the mounting of a glass ball body; a sealing assembly is mounted at the water spray port; a double-lever support structure is connected to the end of the sealing assembly away from the water spray port, and the end of the double-lever support structure away from the sealing assembly abuts against one end of the glass ball body; the double-lever support structure comprises a movable-block body and a movable-block support; an annular snap-fit recess is provided in the inner wall of the sprinkler head body, and a first end of the movable-block body and a first end of the movable-block support are respectively arranged on two sides of the annular snap-fit recess; and a connecting portion is provided at a second end of the movable-block body, a connecting recess is provided at a second end of the movable-block support, and the connecting portion is arranged in the connecting recess. By means of the double-lever support structure, the support force on the sealing assembly can be effectively increased, such that the sprinkler head body can be applied to places having a large K-factor.

Description

A type of closed fire sprinkler head Technical Field

[0001] This invention relates to the field of closed sprinkler head technology, and in particular to a closed fire sprinkler head. Background Technology

[0002] Currently available closed-loop fire sprinkler heads typically use glass bulbs or fusible alloys as heat-sensitive elements. Glass bulb type closed-loop sprinkler heads use a glass bulb directly against a sealing gasket, with the glass bulb bearing all the pressure, which limits their application to sprinkler heads with low flow coefficients. Fusible alloy type sprinkler heads can withstand high pressures structurally and can be used in sprinkler heads with high flow coefficients, but they are expensive, and there are very few qualified and stable fusible alloy suppliers, with significant restrictions on Chinese companies.

[0003] Therefore, there is an urgent need in the field for a glass sphere-type closed nozzle that can be used for high flow coefficients to solve the above problems.

[0004] Summary of the Invention

[0005] The purpose of this invention is to provide a closed-type fire sprinkler head to solve the problems existing in the prior art. It improves the support force on the sealing component through a double lever support structure, making it applicable to places with high flow coefficients.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention discloses a closed-type fire sprinkler head, including a sprinkler head body, one end of which is provided with a water nozzle for connecting to a water pipe. The sprinkler head body also includes a hollow cavity for installing a glass bulb body. A sealing component is installed at the water nozzle, and a double lever support structure is connected to the end of the sealing component away from the water nozzle. The end of the double lever support structure away from the sealing component abuts against one end of the glass bulb body.

[0008] The double lever support structure includes a movable block body and a movable block bracket. The inner wall of the spray head body is provided with an annular snap-fit ​​groove. The first end of the movable block body and the first end of the movable block bracket are respectively located on both sides of the snap-fit ​​groove. The second end of the movable block body is provided with a connecting part, and the second end of the movable block bracket is provided with a connecting groove. The connecting part is located in the connecting groove.

[0009] Preferably, the connecting part is a spherical structure and the connecting groove is an arc-shaped groove;

[0010] The connecting groove has a central angle of less than 180°.

[0011] Preferably, the movable block support is connected to the glass ball body via a glass ball support, the movable block support has a support groove at one end near the glass ball support, and the glass ball support has a support protrusion at one end near the movable block support, the support protrusion being inserted into the support groove.

[0012] Preferably, the outer peripheral surface of the groove of the support groove has an angle with the horizontal plane.

[0013] Preferably, the glass ball holder has a insertion groove at one end near the glass ball body, and one end of the glass ball body can be inserted into the insertion groove.

[0014] Preferably, the sealing assembly includes a sealing gasket and a sealing bracket, wherein the sealing gasket is closer to the spray nozzle than the sealing bracket.

[0015] Preferably, the sealing gasket has a sealing groove at one end near the sealing bracket, and the sealing bracket has a sealing protrusion at one end near the sealing gasket, the sealing protrusion being inserted into the sealing groove.

[0016] Preferably, the outer side of the sealing gasket is covered with a sealing film.

[0017] Preferably, an adjusting screw is threaded to one end of the spray head body away from the spray nozzle, and the adjusting screw abuts against the end of the glass ball body away from the double lever support structure.

[0018] Preferably, a splash plate is connected to the end of the spray head body away from the spray nozzle.

[0019] The present invention achieves the following technical effects compared to the prior art:

[0020] The present invention adds a double lever support structure between the sealing component and the glass ball body, thereby effectively improving the support force on the sealing component and enabling it to be applied in places with high flow coefficients. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a structural schematic diagram of a closed fire sprinkler head according to an embodiment of the present invention;

[0023] Figure 2 is a diagram showing the connection relationship between the movable block body and the movable block support in the closed fire sprinkler head according to an embodiment of the present invention.

[0024] In the diagram: 1-Spray head body; 2-Sealing gasket; 3-Sealing bracket; 4-Lever body; 5-Lever bracket; 6-Glass ball bracket; 7-Glass ball body; 8-Adjusting screw; 9-Splash tray. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The purpose of this invention is to provide a closed-type fire sprinkler head to solve the problems existing in the prior art. It improves the support force on the sealing component through a double lever support structure, making it applicable to places with high flow coefficients.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] As shown in Figures 1 and 2, this invention provides a closed-type fire sprinkler head, including a sprinkler head body 1. One end of the sprinkler head body 1 is provided with a spray nozzle, and the outer wall of the spray nozzle is provided with external threads for threaded connection with a water pipe. The sprinkler head body 1 also includes a hollow cavity for installing a glass bulb body 7. The glass bulb body 7 is a prior art material, and its interior is filled with a thermally expanding liquid, including but not limited to kerosene or ether. A sealing component is installed at the spray nozzle, and the end of the sealing component away from the spray nozzle is connected to a double-lever support structure. The end of the double-lever support structure away from the sealing component can abut against one end of the glass bulb body 7.

[0029] As shown in Figure 1, the double-lever support structure includes a movable block body 4 and a movable block bracket 5. The inner wall of the spray head body 1 has an annular locking groove. As can be seen in Figure 1, the inner wall of the spray head body 1 has an annular protrusion, and the lower end of the annular protrusion is the annular locking groove. The first end of the movable block body 4 and the first end of the movable block bracket 5 are respectively located on opposite sides of the locking groove, meaning their first ends are far apart and have a certain curvature, allowing them to engage with the locking groove. The upper surfaces of the first ends of the movable block body 4 and the movable block bracket 5 are located on the lower surface of the annular protrusion, and the lower surfaces of the first ends of the movable block body 4 and the movable block bracket 5 can abut against the sealing component. The second end of the movable block body 4 has a connecting part, and the second end of the movable block bracket 5 has a connecting groove. The connecting part is located within the connecting groove. When the movable block body 4 and the movable block bracket 5 are installed, the double-lever support structure forms an "A" shape.

[0030] In practical use, due to the presence of the double-lever support structure, a portion of the water pressure on the sealing assembly is distributed to the spray head body 1, and due to the lever arm principle, the force acting on the glass bulb body 7 is significantly reduced. This not only increases the support force on the sealing assembly but also reduces the pressure on the glass bulb body 7, thus enabling the spray head body 1 to be used in applications with high flow coefficients.

[0031] In this embodiment, the connecting part is a spherical structure, the connecting groove is an arc-shaped groove, and the diameter of the connecting part matches the inner diameter of the connecting groove.

[0032] It should be noted that the connecting groove has a central angle of less than 180°, that is, the arc surface b in Figure 2 is a minor arc. The purpose of this setting is to ensure that the movable block body 4 and the movable block support 5 can be smoothly separated when the spray head body 1 is in motion.

[0033] In this embodiment, the movable block support 5 is connected to the glass ball body 7 via the glass ball support 6. Specifically, the movable block support 5 has a support groove at one end near the glass ball support 6, and the glass ball support 6 has a support protrusion at one end near the movable block support 5. The support protrusion is inserted into the support groove, and the cooperation between the support protrusion and the support groove enables rapid positioning of the two.

[0034] In this embodiment, the outer peripheral surface of the support groove has an angle α with the horizontal plane, which can be understood as a conical surface with a smaller top and a larger bottom on the outer peripheral surface of the support groove. The lower end support protrusion of the matching glass ball bracket 6 has an inverted conical surface with a larger top and a smaller bottom. The purpose of this design is to facilitate the automatic alignment of the glass ball bracket 6 with the center line during assembly, eliminating damage to the glass ball body 7 caused by forces other than those in the axial direction.

[0035] In this embodiment, the glass ball support 6 has an insertion groove at one end near the glass ball body 7, and one end of the glass ball body 7 can be inserted into the insertion groove to achieve the positioning of the glass ball body 7.

[0036] In this embodiment, the sealing assembly includes a sealing gasket 2 and a sealing bracket 3. The sealing gasket 2 is closer to the water nozzle than the sealing bracket 3. The sealing gasket 2 is used to seal the water nozzle, while the sealing bracket 3 is used to support the sealing gasket 2.

[0037] In this embodiment, the sealing gasket 2 has a sealing groove at one end near the sealing bracket 3, and the sealing bracket 3 has a sealing protrusion at one end near the sealing gasket 2. The sealing protrusion is inserted into the sealing groove to achieve rapid positioning of the sealing gasket 2 and the sealing bracket 3.

[0038] In this embodiment, the outer side of the sealing gasket 2 is wrapped with a sealing film made of polytetrafluoroethylene to improve the sealing performance.

[0039] In this embodiment, an adjusting screw 8 is threaded onto the end of the spray head body 1 away from the spray nozzle. The end of the adjusting screw 8 abuts against the end of the glass ball body 7 away from the double lever support structure. By rotating the adjusting screw 8, the glass ball body 7 can be fixed to the glass ball bracket 6 and a certain force can be applied to ensure the sealing effect of the sealing gasket 2.

[0040] In this embodiment, a splash plate 9 is connected to the end of the spray head body 1 away from the spray nozzle. The water sprayed from the spray nozzle can splash in all directions after hitting the splash plate 9, thereby achieving the technical effect of spraying water over a large area.

[0041] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A closed type fire sprinkler head, comprising a sprinkler head body, one end of the sprinkler head body is provided with a water outlet, the water outlet is used for connecting with a water pipe, the sprinkler head body further comprises a hollow cavity, a glass ball body is arranged in the hollow cavity, and the closed type fire sprinkler head is characterized in that: The sealing assembly is connected with a double-lever supporting structure at one end away from the water spraying port, and the other end of the double-lever supporting structure is abutted with one end of the glass ball body. ​ The double-lever supporting structure comprises a movable block body and a movable block support, and the inner wall of the spraying head body is provided with an annular clamping groove, the first end of the movable block body and the first end of the movable block support are arranged on the two sides of the clamping groove respectively, the second end of the movable block body is provided with a connecting part, and the second end of the movable block support is provided with a connecting groove, and the connecting part is arranged in the connecting groove.

2. The closed fire sprinkler head of claim 1, wherein: The connecting part is a spherical structure, and the connecting groove is an arc-shaped groove. The central angle of the connecting groove is less than 180°.

3. The closed fire sprinkler head of claim 1, wherein: The movable block support is connected with the glass ball body through a glass ball support, one end of the movable block support close to the glass ball support is provided with a supporting recess, and one end of the glass ball support close to the movable block support is provided with a supporting protrusion, and the supporting protrusion is inserted into the supporting recess.

4. The closed fire sprinkler head of claim 3, wherein: The outer peripheral surface of the slot of the supporting recess has an included angle with the horizontal plane.

5. The closed fire sprinkler head of claim 3, wherein: One end of the glass ball body is capable of being inserted into the insertion groove.

6. The closed fire sprinkler head of claim 1, wherein: The sealing assembly comprises a sealing gasket and a sealing support, and the sealing gasket is closer to the water spraying port than the sealing support.

7. The closed fire sprinkler head of claim 6, wherein: One end of the sealing gasket close to the sealing support is provided with a sealing recess, and one end of the sealing support close to the sealing gasket is provided with a sealing protrusion, and the sealing protrusion is inserted into the sealing recess.

8. The closed fire sprinkler head of claim 6, wherein: The outer side of the sealing gasket is wrapped with a sealing film.

9. The closed fire sprinkler head of claim 1, wherein: One end of the spraying head body away from the water spraying port is threadedly connected with an adjusting screw, and the other end of the adjusting screw is abutted with one end of the glass ball body away from the double-lever supporting structure.

10. The closed fire sprinkler head of claim 1, wherein: One end of the spraying head body away from the water spraying port is connected with a splash plate.

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