Box cover fixing screw

Abstract

The utility model discloses. The utility model discloses a box cover fixing screw which comprises a threaded column and a bolt head, the bolt head is welded to the top of the threaded column, a ventilation cavity is formed in the threaded column, an air collection cavity is formed in the threaded head, the air collection cavity, an exhaust hole and the ventilation cavity are communicated, the two ends of the ventilation cavity are in the shape of horn mouths which are symmetrically designed, and the two ends of the ventilation cavity are in the shape of horn mouths. A sliding groove is formed in the ventilation cavity, a blocking mechanism is arranged in the sliding groove in a sliding fit mode, the blocking mechanism comprises a floating plate and a floating body, the floating plate is arranged in the sliding groove in a sliding fit mode, and the floating body is fixedly installed at the top of the floating plate. According to the box cover fixing screw, gas in a box body can be exhausted through the gas collection cavity, the exhaust hole and the ventilation cavity, and the two ends of the ventilation cavity are arranged to be horn-shaped, so that gas exhausting can be accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing screws, in particular to a fixing screw for a box cover. Background Art

[0002] In the process of production, manufacturing or daily life, screws are often used to connect and fix components. Screws are also usually used to fix the box cover for containing liquid.

[0003] In view of the above related technologies, the inventor believes that in the prior art, when storing some special liquids, the liquid will generate gas, resulting in an increase in the air pressure inside the box and damaging the box body. To avoid this situation, it is extremely inconvenient to install an exhaust valve on the box body. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a fixing screw for a box cover, which solves the problems put forward in the above background art.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model is realized through the following technical solutions: a fixing screw for a box cover, including a threaded column and a bolt head, the bolt head is welded to the top of the threaded column, a ventilation cavity is opened in the threaded column, a gas collection cavity is opened in the threaded head, the gas collection cavity, the exhaust hole and the ventilation cavity are connected, both ends of the ventilation cavity are designed in a symmetrically flared shape, a sliding groove is opened in the ventilation cavity, and a blocking mechanism is slidably fitted in the sliding groove. The blocking mechanism includes a floating plate and a floating body, the floating plate is slidably fitted in the sliding groove, and the floating body is fixedly installed on the top of the floating plate.

[0008] By adopting the above technical solutions, through the provided gas collection cavity, exhaust hole and ventilation cavity, the gas in the box body can be discharged. Setting both ends of the ventilation cavity to be flared can accelerate the discharge of gas. The provided blocking mechanism can be used to seal the ventilation cavity to prevent liquid from overflowing.

[0009] Preferably, an air duct is opened in the threaded column, one end opening of the air duct is close to the threaded head, and the other end opening of the air duct is located at the middle constriction of the ventilation cavity.

[0010] By adopting the above technical solutions, the provided air duct is used to discharge the gas at the top of the box body, and the Venturi effect is generated under the action of the middle constriction of the ventilation cavity to accelerate the discharge of gas.

[0011] Preferably, the top of the floating body is a hemispherical rubber and is used to block the middle constriction of the ventilation cavity.

[0012] By adopting the above technical solution, making the top of the floating body hemispherical rubber can enable the ventilation cavity to have good sealing performance.

[0013] Preferably, it further includes a sealing mechanism, the sealing mechanism includes a connecting rod, a connecting plate and a sealing block, the connecting rod is fixedly installed on the top of the floating body and the other end extends into the gas collection cavity, the connecting plate is fixedly installed on the top of the connecting rod and is perpendicular to the connecting rod, and the sealing block is fixedly installed on the top of one end of the connecting rod and cooperates with the exhaust hole.

[0014] By adopting the above technical solution, when the floating body floats upward, it drives the sealing mechanism to seal the exhaust hole, which can prevent the liquid from flowing out of the exhaust hole through the exhaust duct.

[0015] Preferably, the sealing block is made of rubber material.

[0016] (III) Beneficial effects

[0017] After adopting the above technical solution, compared with the prior art, the present utility model has the following advantages:

[0018] 1. By providing the gas collection cavity, the exhaust hole and the ventilation cavity, the gas in the box body can be discharged. Setting the two ends of the ventilation cavity as trumpet-shaped can accelerate the gas discharge. The provided blocking mechanism can be used to seal the ventilation cavity to prevent liquid overflow;

[0019] 2. The provided exhaust duct is used to discharge the gas at the top of the box body. The Venturi effect is generated under the action of the constriction in the middle of the ventilation cavity to accelerate the gas discharge. Making the top of the floating body hemispherical rubber can enable the ventilation cavity to have good sealing performance;

[0020] 3. When the floating body floats upward, it drives the sealing mechanism to seal the exhaust hole, which can prevent the liquid from flowing out of the exhaust hole through the exhaust duct. Description of the drawings

[0021] Figure 1 It is a schematic diagram of the present utility model;

[0022] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0023] Description of the reference numerals:

[0024] 1, threaded column; 11, ventilation cavity; 12, chute; 13, exhaust duct; 2, bolt head; 21, exhaust hole; 22, gas collection cavity; 3, blocking mechanism; 31, floating plate; 32, floating body; 4, sealing mechanism; 41, connecting rod; 42, connecting plate; 43, sealing block. Specific embodiments

[0025] The present utility model will be further elaborated in detail below with reference to the accompanying drawings and embodiments.

[0026] As Figure 1-2 shown: A box cover fixing screw includes a threaded post and a bolt head. The bolt head is welded to the top of the threaded post. An air vent cavity is provided inside the threaded post, and a gas collecting cavity is provided inside the threaded head. The gas collecting cavity, the exhaust hole and the air vent cavity are connected and communicated. The provided gas collecting cavity, exhaust hole and air vent cavity can exhaust the gas inside the box.

[0027] Both ends of the air vent cavity are designed in a symmetrically flared shape. By setting both ends of the air vent cavity in a flared shape, the exhaust of gas can be accelerated. A chute is provided inside the air vent cavity, and a blocking mechanism is slidably fitted inside the chute.

[0028] The blocking mechanism includes a floating plate and a floating body. The floating plate is slidably fitted inside the chute, and the floating body is fixedly installed on the top of the floating plate. The blocking mechanism can be used to seal the air vent cavity to prevent liquid from overflowing.

[0029] An air duct is provided inside the threaded post. One opening end of the air duct is close to the threaded head, and the other opening end of the air duct is located at the constriction in the middle of the air vent cavity. The top of the floating body is hemispherical rubber and is used to block the constriction in the middle of the air vent cavity.

[0030] It further includes a sealing mechanism. The sealing mechanism includes a connecting rod, a connecting plate and a rubber sealing block. The connecting rod is fixedly installed on the top of the floating body and the other end extends into the gas collecting cavity. The connecting plate is fixedly installed on the top of the connecting rod and is perpendicular to the connecting rod. The sealing block is fixedly installed on the top of one end of the connecting rod and is matched with the exhaust hole. When the floating body floats upward, it drives the sealing mechanism to seal the exhaust hole, which can prevent liquid from flowing out of the exhaust hole through the air duct.

[0031] The above is based on the inspiration of the embodiments. Through the above description, relevant staff can completely make various changes and modifications without departing from the idea of this invention. The technical scope of this utility model is not limited to the content in the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A box cover fixing screw, comprising a threaded post (1) and a bolt head (2), wherein the bolt head (2) is welded to the top of the threaded post (1), and is characterized in that: An air vent cavity (11) is formed inside the threaded post (1), and a gas collecting cavity (22) is formed inside the bolt head (2). The gas collecting cavity (22), the exhaust hole (21) and the air vent cavity (11) are connected. The two ends of the air vent cavity (11) are designed in a symmetrically flared shape. A sliding groove (12) is formed inside the air vent cavity (11), and a blocking mechanism (3) is slidably fitted inside the sliding groove (12). The blocking mechanism (3) includes a floating plate (31) and a floating body (32). The floating plate (31) is slidably fitted inside the sliding groove (12), and the floating body (32) is fixedly installed at the top of the floating plate (31).

2. The fixing screw for the box cover according to claim 1, wherein: An air exhaust duct (13) is formed inside the threaded post (1). One opening end of the air exhaust duct (13) is close to the bolt head (2), and the other opening end of the air exhaust duct (13) is located at the middle constriction of the air vent cavity (11).

3. The fixing screw for the box cover according to claim 2, characterized in that: The top of the floating body (32) is a hemispherical rubber and is used to block the middle constriction of the air vent cavity (11).

4. The fixing screw for the box cover according to claim 2, wherein: A sealing mechanism (4) is further included. The sealing mechanism (4) includes a connecting rod (41), a connecting plate (42) and a sealing block (43). The connecting rod (41) is fixedly installed at the top of the floating body (32) and the other end extends into the gas collecting cavity (22). The connecting plate (42) is fixedly installed at the top of the connecting rod (41) and is perpendicular to the connecting rod (41). The sealing block (43) is fixedly installed at the top of one end of the connecting rod (41) and is matched with the exhaust hole (21).

5. A lid fixing screw according to claim 4, characterized in that: The sealing block (43) is made of rubber material.

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