Flange nut for anti-cracking valve

Abstract

The utility model discloses a flange nut for an anti-cracking valve, which belongs to the technical field of flange nuts and comprises a fixing plate, a mounting port is arranged in the middle of the fixing plate, an internal thread pipe communicated with the mounting port is fixedly mounted at the bottom of the fixing plate, a square groove is arranged at the top of the mounting port, and a flange is arranged in the square groove. A square frame is clamped in the square groove, a non-slip mat is fixed to the outer side of the square frame, conical grooves are evenly formed in the top of the non-slip mat, and a limiting block is fixed to the bottom of the non-slip mat. Through cooperative use of the fixing plate, the mounting port, the internal threaded pipe, the square groove, the non-slip mat, the conical groove, the square frame, the limiting block and the limiting groove, the flange plate can be limited through the non-slip mat and the conical groove, and the problems of cracking and the like caused by uneven pressure distribution at the joint due to overall looseness of the internal threaded pipe are further solved through the square groove and the square frame; and therefore, the practicability of the anti-cracking flange nut for the valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flange nuts, in particular to a flange nut for an anti-cracking valve. Background Art

[0002] Generally, nuts with hexagonal flange surfaces are called flange nuts. Flange nuts are also widely used. Generally, flange nuts are required to be used with many screws and bolts. And if flange nuts are used, the tightening is very good. There is a flange surface that works well with screws and bolts. The tightening performance is much better than that of hexagonal nuts. Flange nuts are a type of nut that only has locking force after the nut and the connected part generate pre-tightening force when tightened. Taking the combination of nuts and screws as an example, rotating the nut causes the bolt to stretch under force, and the tension generated by the elongation of the bolt clamps the flange. Its locking performance depends on the pre-tightening force of the bolt. If the pre-tightening force is difficult to control within a reasonable range, the reliability of its locking and anti-loosening is uncertain. Once the pre-tightening force is lost, its locking ability is equal to zero.

[0003] For example, the utility model with application number 201220437272.4 discloses an anti-loosening flange nut, in which an annular groove is provided on one end of the connection part close to the flange part, so that it has a suspension effect, improves the fatigue strength of the threaded connection, is not easy to deform, increases the life of the thread, and the load distribution of each part of the thread on the nut tends to be uniform. Anti-slip teeth are provided on the end face of the flange part, which increases the friction of the contact surface and can effectively prevent the flange nut from loosening and sliding against the tightening direction. Made of high-strength steel, it improves the reliability of the threaded connection and is not easy to loosen. It has a simple structure, is easy to make, and has a long service life.

[0004] Similar to the above application, there are still some shortcomings:

[0005] The contact surface between this type of anti-loosening flange nut and the flange is provided with anti-skid teeth, and the material of the anti-skid teeth is the same as that of the flange nut itself. Although the structure is simple, the anti-skid effect is limited, and it is easy to cause friction damage and deformation of the anti-skid teeth. Moreover, it is not easy to replace them when they are worn.

[0006] For this purpose, anti-cracking valves are designed with flange nuts to optimize the above problems. Utility Model Content

[0007] The main purpose of the utility model is to provide a flange nut for an anti-cracking valve to solve the related technical problems raised in the above background technology.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A flange nut for an anti-cracking valve comprises a fixing plate, a mounting opening is provided in the middle position of the fixing plate, an internally threaded tube connected to the mounting opening is fixedly provided on the bottom of the fixing plate, a square groove is provided on the top of the mounting opening, a square frame is engaged inside the square groove, an anti-skid pad is fixed on the outside of the square frame, conical grooves are evenly provided on the top of the anti-skid pad, a limiting block is fixed on the bottom of the anti-skid pad, limiting grooves matching the limiting block are evenly provided on the top of the fixing plate, and a protective mechanism is provided between the fixing plate and the internally threaded tube.

[0010] Preferably: the protective mechanism includes a fixed tube and a movable ring, the fixed tube is located at the bottom of the fixed plate, the outer side of the fixed tube is sleeved with a movable ring, the outer side of the fixed tube is sleeved with a spring, the bottom of the movable ring is fixed with a protective tube, and the bottom of the protective tube is fixed with a sealing ring.

[0011] Preferably: a limiting ring is fixed on the top of the fixed tube, a rotating ring is fixed on the top of the limiting ring, a sliding groove matching the rotating ring is provided on the bottom of the fixed plate, and the sliding groove and the rotating ring are engaged with each other.

[0012] Preferably, a protective pad is provided at the bottom of the sealing ring, and anti-slip grooves are provided on the protective pad.

[0013] Preferably, anti-skid particles are evenly arranged on the top of the anti-skid pad, and the anti-skid pad is a rubber pad.

[0014] Preferably, an anti-corrosion coating is fixed on the outer side of the fixing plate, and reinforcing ribs are arranged inside the internally threaded tube.

[0015] The beneficial effects of the utility model are:

[0016] The flange nut for the anti-cracking valve provided by the utility model can be limited on the flange plate by using the anti-skid pad and the tapered groove through the coordinated use of the fixing plate, the mounting port, the internal threaded pipe, the square groove, the anti-skid pad, the tapered groove, the square frame, the limit block and the limit groove. The square groove and the square frame further reduce the overall loosening of the internal threaded pipe, which causes uneven pressure distribution at the connection and causes cracking, thereby improving the practicality of the flange nut for the anti-cracking valve;

[0017] Through the coordinated use of the limiting ring, the fixed tube, the movable ring, the spring, the sealing ring and the protective tube, after the internal threaded tube is tightened on the flange, the sealing ring is loosened and contracts under the elastic force of the spring and drives the movable ring and the protective tube to move downward, thereby protecting the outer side of the internal threaded tube. When an external object hits the outer side of the internal threaded tube, it is blocked by the outer protective tube and the fixed tube, thereby improving the protective force on the outer side of the internal threaded tube, thereby improving the protective effect of the flange nut for the anti-cracking valve;

[0018] Through the coordinated use of the slide groove and the rotating ring, when an object collides with the protective tube, the protective tube drives the limit ring and the rotating ring to slide along the slide groove, so that hard friction is converted into rolling friction, thereby further improving the overall protection effect, thereby improving the firmness of the flange nut for the anti-cracking valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front cross-sectional view of the utility model;

[0020] Figure 2 It is a schematic diagram of a fixing plate of the utility model;

[0021] Figure 3 It is a schematic diagram of the protection mechanism of the utility model.

[0022] In the figure: 1. fixed plate; 2. mounting port; 3. internal threaded tube; 4. square groove; 5. anti-slip pad; 6. conical groove; 7. square frame; 8. protective mechanism; 9. limit block; 10. limit groove; 11. slide groove; 12. rotating ring; 13. limit ring; 14. fixed tube; 15. movable ring; 16. spring; 17. sealing ring; 18. protective tube. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0024] Embodiment 1

[0025] like Figure 1-Figure 3 As shown, the present embodiment provides a flange nut for an anti-cracking valve, comprising a fixing plate 1, a mounting port 2 being provided at the middle position of the fixing plate 1, an internally threaded tube 3 connected to the mounting port 2 being fixedly installed at the bottom of the fixing plate 1, a square groove 4 being provided at the top of the mounting port 2, a square frame 7 being engaged inside the square groove 4, an anti-slip pad 5 being fixed at the outside of the square frame 7, a conical groove 6 being evenly provided at the top of the anti-slip pad 5, a limiting block 9 being fixed at the bottom of the anti-slip pad 5, a limiting groove 10 matching the limiting block 9 being evenly provided at the top of the fixing plate 1, a protective mechanism 8 being provided between the fixing plate 1 and the internally threaded tube 3, the protective mechanism 8 comprising a fixed tube 14 and a movable ring 15, the fixed tube 14 being located at the bottom of the fixing plate 1, a movable ring 15 being sleeved on the outer side of the fixed tube 14, a spring 16 being sleeved on the outer side of the fixed tube 14, a protective tube 18 being fixed at the bottom of the movable ring 15, and a sealing ring 17 being fixed at the bottom of the protective tube 18.

[0026] The limiting blocks 9 at the bottom of the anti-slip pad 5 are respectively engaged in the inside of the limiting grooves 10, so that the fixing plate 1 and the mounting port 2 are installed on the flange, the anti-slip pad 5 and the conical groove 6 are tightly fitted on the flange, and the anti-slip pad 5 and the fixing plate 1 are prevented from rotating under the mutual limitation of the square groove 4 and the square frame 7. After the internal threaded tube 3 is tightened on the flange, the sealing ring 17 is loosened and shrinks under the elastic force of the spring 16, and drives the movable ring 15 and the protective tube 18 to move downward, thereby protecting the outer side of the internal threaded tube 3. When an external object hits the outer side of the internal threaded tube 3, it is blocked by the outer protective tube 18 and the fixed tube 14, thereby improving the protection force on the outer side of the internal threaded tube 3.

[0027] Embodiment 2

[0028] In this embodiment, if Figure 1-Figure 3 As shown, a limit ring 13 is fixed on the top of the fixed tube 14, a rotating ring 12 is fixed on the top of the limit ring 13, a sliding groove 11 matching the rotating ring 12 is provided at the bottom of the fixed plate 1, and the sliding groove 11 and the rotating ring 12 are engaged with each other.

[0029] When an object collides with the protection tube 18 , the protection tube 18 drives the limiting ring 13 and the rotating ring 12 to slide along the slide groove 11 , so that the hard friction is converted into rolling friction.

[0030] In this embodiment, a protective pad is provided at the bottom of the sealing ring 17, and anti-slip grooves are provided on the protective pad.

[0031] The provision of the protective pad provides a protective effect on the bottom of the sealing ring 17 , further strengthening the protective force on the internally threaded pipe 3 .

[0032] In this embodiment, anti-skid particles are evenly arranged on the top of the anti-skid pad 5, and the anti-skid pad 5 is a rubber pad.

[0033] The anti-skid pad 5 made of anti-skid particles and rubber material has a certain elastic deformation force, thereby reducing the damage caused by hard friction.

[0034] In this embodiment, an anti-corrosion coating is fixed on the outer side of the fixing plate 1 , and reinforcing ribs are arranged inside the internally threaded tube 3 .

[0035] The anti-corrosion coating improves the protection effect on the outer side of the fixing plate 1 and reduces the problems of corrosion embrittlement. The provision of the reinforcing ribs improves the firmness of the internally threaded pipe 3.

[0036] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. Flange nuts for anti-cracking valves, characterized by: The invention comprises a fixing plate (1), wherein a mounting opening (2) is provided in the middle of the fixing plate (1), an internally threaded tube (3) connected to the mounting opening (2) is fixedly provided at the bottom of the fixing plate (1), a square groove (4) is provided at the top of the mounting opening (2), a square frame (7) is engaged inside the square groove (4), an anti-skid pad (5) is fixed on the outside of the square frame (7), a conical groove (6) is evenly provided on the top of the anti-skid pad (5), a limiting block (9) is fixed at the bottom of the anti-skid pad (5), a limiting groove (10) matching the limiting block (9) is evenly provided on the top of the fixing plate (1), and a protective mechanism (8) is provided between the fixing plate (1) and the internally threaded tube (3).

2. The anti-cracking valve flange nut according to claim 1, characterized in that: The protective mechanism (8) comprises a fixed tube (14) and a movable ring (15); the fixed tube (14) is located at the bottom of the fixed plate (1); the movable ring (15) is sleeved on the outer side of the fixed tube (14); the spring (16) is sleeved on the outer side of the fixed tube (14); a protective tube (18) is fixed to the bottom of the movable ring (15); and a sealing ring (17) is fixed to the bottom of the protective tube (18).

3. The anti-cracking valve flange nut according to claim 2, characterized in that: A limiting ring (13) is fixed on the top of the fixed tube (14), a rotating ring (12) is fixed on the top of the limiting ring (13), a sliding groove (11) matching the rotating ring (12) is provided on the bottom of the fixed plate (1), and the sliding groove (11) and the rotating ring (12) are engaged with each other.

4. The anti-cracking valve flange nut according to claim 2, characterized in that: A protective pad is arranged at the bottom of the sealing ring (17), and anti-slip grooves are arranged on the protective pad.

5. The anti-cracking valve flange nut according to claim 1, characterized in that: The top of the anti-skid pad (5) is evenly provided with anti-skid particles, and the anti-skid pad (5) is a rubber pad.

6. The anti-cracking valve flange nut according to claim 1, characterized in that: An anti-corrosion coating is fixed on the outer side of the fixing plate (1), and reinforcing ribs are arranged inside the internally threaded tube (3).

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