A new type of sealing device for adjusting door shaft

Abstract

The utility model discloses a novel regulating door shaft sealing device, comprising a regulating door shell and a sealing device shell. The regulating door mainly plays a cut-off role in the pipeline system, that is, cutting off or closing the flow of fluid, and can adjust the flow rate of the medium according to the working conditions. The sealing device can prevent a gap from appearing between the door shaft and the pipeline, resulting in leakage of the medium in the pipeline. The regulating door shell is rotatably connected with the regulating door shaft. When the regulating door shaft rotates, the regulating door and the regulating door shaft rotate together, and the flow direction and flow rate of the fluid are controlled during the rotation. A sealing gasket is fixedly connected to the outer side of the regulating door shell, and the other side of the sealing gasket is fixedly connected to the sealing device shell. The sealing gasket can prevent leakage between the sealing device shell and the regulating door shell. Fluororubber has a series of good characteristics such as high temperature resistance, corrosion resistance, high hardness and good sealing performance, and is therefore suitable as a sealing gasket material for the outer side of the regulating door shell.

Description

Technical Field

[0001] The utility model relates to the field of baffle-type regulating doors and butterfly-shaped regulating doors, in particular to a novel sealing device for a shaft of a regulating door. Background Art

[0002] A regulating valve (regulating gate) is a valve used to adjust process parameters such as medium flow, pressure, temperature, liquid level, etc. in the field of industrial automation process control. It automatically adjusts the valve opening according to the control signal in the automation system, thereby achieving the regulation of medium flow, pressure, temperature and liquid level. Regulating valves can be divided into different types such as butterfly valve type regulating valves, baffle type regulating valves, ball valve type regulating valves, plunger type regulating valves, etc.

[0003] The existing baffle-type regulating door and butterfly-type regulating door shaft seals all use graphite packing as packing seals. Their sealing ability depends on the tightening force of the gland on the packing. The graphite packing has poor wear resistance and no self-compensation ability. The rotation of the regulating door shaft causes wear of the graphite packing. A gap appears between the door shaft and the packing, causing the medium in the pipeline to leak. The leaked medium scours the packing, causing the leakage to expand. The door shaft seal leakage problem cannot be handled during system operation. Utility Model Content

[0004] The purpose of the utility model is to provide a novel regulating door shaft sealing device, which solves the problem that in the prior art, the baffle-type regulating door and the butterfly regulating door shaft seal all use graphite packing as the packing seal, the door shaft seal frequently leaks, affecting the safe and stable operation of the system, and the door shaft seal frequently leaks. The utility model does not require maintenance all year round, solves the problem of medium leakage in the pipeline, and avoids the annual maintenance cost of replacing the packing.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of adjustable door shaft sealing device, including an adjustable door shell and a sealing device shell, a fixing ring is fixedly connected to the sealing device shell, and a trapezoidal groove is provided on the sealing device shell; an adjustable door shaft is rotatably connected to the adjustable door shell, and the adjustable door shaft passes through the adjustable door shell to the outside, a sealing gasket is fixedly connected to the outside of the adjustable door shell, and the other side of the sealing gasket is fixedly connected to the sealing device shell, and the material of the sealing gasket is fluororubber.

[0006] As a further description of the above technical solution: a first bolt is fixedly connected to the fixing ring, and the first bolt is threadedly connected to the adjusting door housing through a trapezoidal groove.

[0007] As a further description of the above technical solution: two screw holes are arranged on both sides of the sealing device housing, and the second bolt and the third bolt are respectively threadedly connected to the screw holes.

[0008] As a further description of the above technical solution: an adjusting door shaft channel is arranged inside the sealing device shell, and the adjusting door shaft passes through the adjusting door shaft channel to the outside.

[0009] As a further description of the above technical solution: the second bolt and the third bolt fix the two sealing device shells, and the sealing device shells are fixed on the adjusting door shaft.

[0010] As a further description of the above technical solution: five sealing ring channels are arranged inside the sealing device housing, and sealing rings are arranged inside the sealing ring channels. The material of the sealing rings is copper.

[0011] As a further description of the above technical solution: a groove is arranged on the outer side surface of the sealing ring, a spring is fixedly connected to the groove, and the inner wall of the sealing ring is coated with lead powder.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with the prior art, the novel regulating door shaft sealing device adopts fluororubber sealing pad, sealing device housing, first bolt, second bolt, third bolt and sealing ring to replace graphite packing as packing seal, thus avoiding the leakage of medium in the pipeline caused by the gap between the door shaft and the packing, and ensuring the safe and stable operation of the system;

[0014] 2. Compared with the prior art, this new type of adjustable door shaft sealing device effectively reduces the wear and tear of the sealing ring by setting grooves, springs, sealing ring channels and lead powder. It does not require maintenance all year round, saving the annual maintenance cost of replacing packing.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a front view of the overall structure plane of the utility model.

[0019] Figure 3 It is a three-dimensional schematic diagram of the shell structure of the sealing device of the utility model.

[0020] Figure 4 It is a three-dimensional schematic diagram of the sealing ring structure of the utility model.

[0021] Legend:

[0022] 1. Adjustment door housing; 2. Sealing gasket; 3. Trapezoidal groove; 4. Fixing ring; 5. Sealing device housing; 6. Adjustment door shaft; 7. First bolt; 8. Second bolt; 9. Third bolt; 10. Sealing ring channel; 11. Adjustment door shaft channel; 12. Screw hole; 13. Groove; 14. Spring; 15. Sealing ring; 16. Lead powder. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Reference Figure 1-4 The utility model provides an embodiment of a novel regulating door shaft sealing device, comprising an regulating door housing 1 and a sealing device housing 5. The regulating door mainly plays a cut-off role in the pipeline system, that is, cutting off or closing the flow of the fluid, and can adjust the flow of the medium according to the working conditions. The sealing device can prevent a gap from appearing between the door shaft and the pipeline, resulting in leakage of the medium in the pipeline. A fixing ring 4 is fixedly connected to the sealing device housing 5, and a trapezoidal groove 3 is provided on the sealing device housing 5;

[0025] An adjusting door shaft 6 is rotatably connected to the adjusting door shell 1. When the adjusting door shaft 6 rotates, the adjusting door and the adjusting door shaft 6 rotate together, and the flow direction and flow rate of the fluid are controlled during the rotation. The adjusting door shaft 6 penetrates the adjusting door shell 1 outward, and a sealing gasket 2 is fixedly connected to the outside of the adjusting door shell 1. The other side of the sealing gasket 2 is fixedly connected to the sealing device shell 5. The material of the sealing gasket 2 is fluororubber. The sealing gasket 2 can prevent leakage between the sealing device shell 5 and the adjusting door shell 1. Fluororubber has a series of good characteristics such as high temperature resistance, corrosion resistance, high hardness and good sealing, and is therefore suitable as the material of the sealing gasket 2 outside the adjusting door shell 5.

[0026] A first bolt 7 is fixedly connected to the fixing ring 4 , and the first bolt 7 is threadedly connected to the adjusting door housing 1 through the trapezoidal groove 3 . The sealing device housing 5 and the adjusting door housing 1 can be connected and fixed by the first bolt 7 .

[0027] Two screw holes 12 are provided on both sides of the sealing device housing 5 , and the second bolt 8 and the third bolt 9 are respectively threadedly connected to the screw holes 12 .

[0028] An adjusting door shaft passage 11 is arranged inside the sealing device housing 5, and the adjusting door shaft 6 passes through the adjusting door shaft passage 11 to the outside.

[0029] The second bolt 8 and the third bolt 9 fix the two sealing device shells 5, and the sealing device shells 5 are fixed on the adjusting door shaft 6. Since the sealing device is composed of two upper and lower sealing device shells 5, the two sealing device shells 5 can be connected and fixed under the action of the second bolt 8 and the third bolt 9.

[0030] Five sealing ring channels 10 are arranged inside the sealing device housing 5, and sealing rings 15 are arranged inside the sealing ring channels 10. The material of the sealing rings 15 is copper. The sealing rings 15 can further improve the sealing effect of the sealing device on the adjusting door shaft 6. Copper has good ductility and is therefore suitable as the material of the sealing rings 15.

[0031] A groove 13 is provided on the outer side of the sealing ring 15, and a spring 14 is fixedly connected to the groove 13. The inner wall of the sealing ring 15 is coated with lead powder 16. When the sealing ring 15 is installed into the sealing ring channel 10, the inner wall of the sealing ring channel 10 squeezes the spring 14, thereby applying pressure to the sealing ring 15 to achieve the effect of installing the sealing ring 15 on the adjusting door shaft 6. The lead powder can have a lubricating effect, so it is coated on the inner wall of the sealing ring 15 to reduce the wear of the sealing ring 15 when the adjusting door shaft 6 rotates.

[0032] Working principle: When the device is used, first apply lead powder 16 on the inner wall of the sealing ring 15, then place the sealing ring 15 in the sealing ring channel 10, and pass the adjusting door shaft 6 through the adjusting door shaft channel 11, then insert the second bolt 8 and the third bolt 9 into the screw hole 12 set on the sealing device housing 5, and connect and fix the two sealing device housings 5. At this time, the inner wall of the sealing ring channel 10 will squeeze the spring 14 fixedly connected to the groove 13, thereby applying pressure to the sealing ring 15, and install the sealing ring 15 on the adjusting door shaft 6, then pass the first bolt 7 through the fixing ring 4 and the trapezoidal groove 3, and the first screw The tail end of the bolt 7 is fixedly connected to the fixing ring 4, and the front section of the first bolt 7 is threadedly connected to the adjusting door housing 1, thereby realizing the connection and fixation between the sealing device housing 5 and the adjusting door housing 1, and a sealing gasket 2 is fixedly connected to the outside of the adjusting door housing 1, and the other side of the sealing gasket 2 is fixedly connected to the sealing device housing 5. The material of the sealing gasket 2 is fluororubber, and fluororubber has the advantages of high temperature resistance, corrosion resistance, high hardness and sealing. The sealing gasket 2 can prevent leakage between the sealing device housing 5 and the adjusting door housing 1. In the subsequent use of the adjusting door, when the adjusting door shaft 6 rotates, the lead powder 16 can reduce the wear of the sealing ring 15.

[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A novel regulating door shaft sealing device, comprising a regulating door housing (1) and a sealing device housing (5), characterized in that: A fixing ring (4) is fixedly connected to the sealing device housing (5), and a trapezoidal groove (3) is provided on the sealing device housing (5); The regulating door housing (1) is rotatably connected to an regulating door shaft (6), the regulating door shaft (6) penetrates the regulating door housing (1) outward, a sealing gasket (2) is fixedly connected to the outside of the regulating door housing (1), the other side of the sealing gasket (2) is fixedly connected to the sealing device housing (5), and the material of the sealing gasket (2) is fluororubber.

2. A novel adjustable door shaft sealing device according to claim 1, characterized in that: A first bolt (7) is fixedly connected to the fixing ring (4), and the first bolt (7) is threadedly connected to the adjusting door housing (1) through a trapezoidal groove (3).

3. A novel adjustable door shaft sealing device according to claim 1, characterized in that: Two screw holes (12) are provided on both sides of the sealing device housing (5), and the screw holes (12) are respectively threadedly connected with a second bolt (8) and a third bolt (9).

4. A novel adjustable door shaft sealing device according to claim 1, characterized in that: An adjustable door shaft channel (11) is provided inside the sealing device housing (5), and the adjustable door shaft (6) passes through the adjustable door shaft channel (11) toward the outside.

5. A novel adjustable door shaft sealing device according to claim 3, characterized in that: The second bolt (8) and the third bolt (9) fix the two sealing device housings (5), and the sealing device housings (5) are fixed on the adjusting door shaft (6).

6. A novel adjustable door shaft sealing device according to claim 1, characterized in that: Five sealing ring channels (10) are arranged inside the sealing device housing (5), and sealing rings (15) are arranged inside the sealing ring channels (10). The sealing rings (15) are made of copper.

7. A novel adjustable door shaft sealing device according to claim 6, characterized in that: The outer side surface of the sealing ring (15) is provided with a groove (13), a spring (14) is fixedly connected to the groove (13), and the inner wall of the sealing ring (15) is coated with lead powder (16).

Images