A sealing structure of a high temperature ash discharge valve

Abstract

The utility model discloses a sealing structure of a high-temperature ash discharge valve, which includes a shaft sleeve, sealing packing rings are installed at both ends of the shaft sleeve, a valve shaft is inserted in the sealing packing ring, the valve shaft, the sealing packing ring and the shaft sleeve form a sealing cavity with a ring-shaped cross section, a spiral oil path groove is opened on the inner wall of the shaft sleeve, an oil filling hole and an oil drain hole are opened on the outer wall of the shaft sleeve, and the oil filling hole and the oil drain hole are both connected with the oil path groove; the beneficial effects of the utility model: the utility model has a simple structure, a sealing cavity and a spiral oil path groove are designed in the shaft sleeve, and grease is injected into the sealing cavity for sealing, the valve with this sealing structure can be applied to a high-hardness, high-mesh, corrosive particle medium environment of about 500°C, effectively improves the service life of the valve, and is worthy of popularization and use.

Description

Technical field:

[0001] The utility model relates to the technical field of high-temperature ash discharge valves, in particular to a sealing structure of a high-temperature ash discharge valve. Background technology:

[0002] The ash discharge valve is a butterfly valve that uses a disc-type opening and closing member to reciprocate 90° to open, close and adjust the fluid channel. It can be used in large-diameter valves and for media with suspended solid particles. It can also be used for powdered and granular media based on the strength of the sealing surface. However, due to the structure of the butterfly valve and the limitations of the sealing material, it is not suitable for high-temperature pipeline systems. The general working temperature is below 300°C. The valve shaft is an important part of the valve and is used for transmission. One side is connected to the actuator, and the other side drives the valve core to move or rotate to achieve the valve switch or regulation. The valve shaft is not only a moving part and a force-bearing part during the valve opening and closing process. At present, most valve shafts on the market are sealed with O-rings. Although the O-ring has good sealing performance, if the compression deformation of the O-ring is too large, the resistance of the switch mesh door will increase, the wear of the O-ring will increase, the service life will be reduced, and it will not be resistant to high temperatures. How to improve the sealing performance of the ash discharge valve shaft under high temperature conditions, reduce the resistance of the butterfly valve shaft to switch the butterfly valve, and improve the sealing performance and service life of the ash discharge valve are problems that need to be solved. Utility model content:

[0003] The utility model aims to provide a sealing structure of a high-temperature ash discharge valve to solve the technical problems of low service life and poor high temperature resistance of the ash discharge valve shaft seal in the prior art.

[0004] Contents of the utility model: A sealing structure of a high-temperature ash discharge valve, comprising a shaft sleeve, sealing packing rings are installed at both ends of the shaft sleeve, a valve shaft is inserted in the sealing packing ring, the valve shaft, the sealing packing ring and the shaft sleeve form a sealing cavity with a ring-shaped cross-section, a spiral oil path groove is opened on the inner wall of the shaft sleeve, an oil filling hole and an oil drain hole are opened on the outer wall of the shaft sleeve, and the oil filling hole and the oil drain hole are both connected to the oil path groove.

[0005] Furthermore, the thickness of the sealed cavity is 8 mm.

[0006] Furthermore, the oil filling hole and the oil drain hole are both tapered holes.

[0007] Furthermore, a funnel material pipe is installed at the oil drain hole, and a ball valve is installed on the funnel material pipe.

[0008] Furthermore, a side tube is installed on the side wall of the funnel material tube, and a proximity switch is installed in the side tube. The proximity switch is electrically connected to the PLC controller, and the PLC controller is electrically connected to the buzzer.

[0009] Furthermore, a rounded corner is provided at the intersection of the side tube and the funnel material tube.

[0010] The beneficial effects of the utility model are as follows: the utility model has a simple structure, a sealing cavity and a spiral oil groove are designed in the shaft sleeve, and grease is injected into the sealing cavity for sealing. The valve with such a sealing structure can be applied to a high-hardness, high-mesh, and corrosive particle medium environment at about 500°C, effectively improving the service life of the valve, and is worthy of popularization and use. Description of the drawings:

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 It is a cross-sectional view of the valve shaft of the utility model;

[0013] Figure 3 This is the control block diagram of the utility model;

[0014] In the figure, the shaft sleeve 1, the sealing packing ring 2, the oil groove 3, the sealing chamber 4, the oil filling hole 5, the oil drain hole 6, the funnel material pipe 7, the side pipe 8, the proximity switch 9, the fillet 10, the valve shaft 11, the ball valve 12, and the valve body 13. Specific implementation method:

[0015] like Figure 1 and Figure 3 As shown, a sealing structure of a high-temperature ash discharge valve includes a sleeve 1, sealing packing rings 2 are installed at both ends of the sleeve 1, a valve shaft 11 is inserted in the sealing packing ring 2, the valve shaft 11, the sealing packing ring 2, and the sleeve 1 form a sealing cavity 4 with a ring cross section, a spiral oil groove 3 is opened on the inner wall of the sleeve 1, and an oil injection hole 5 and an oil discharge hole 6 are opened on the outer wall of the sleeve 1, and the oil injection hole 5 and the oil discharge hole 6 are both connected to the oil groove 3; the thickness of the sealing cavity 4 is 8mm; in order to prevent the grease from flowing out, the oil injection hole 5 and the oil discharge hole 6 are both tapered holes.

[0016] When the grease reaches the dropping point, in order to better recover the liquid grease, a funnel pipe 7 is installed at the oil drain hole 6, and a ball valve 12 is installed on the funnel pipe 7.

[0017] In order to detect the grease reaching the dropping point in time and replenish the grease in time, such as Figure 2 and Figure 3 As shown, a side tube 8 is installed on the side wall of the funnel material tube 7, and a proximity switch 9 is installed in the side tube 8. The proximity switch 9 is electrically connected to the PLC controller, and the PLC controller is electrically connected to the buzzer. In order to prevent liquid grease from flowing into the side tube 8 and contaminating the proximity switch 9, a fillet 10 is provided at the intersection of the side tube 8 and the funnel material tube 7.

[0018] When doing specific work, such as Figures 1 to 3 As shown, high temperature resistant grease is injected into the oil filling hole 5, and the grease covers the entire oil groove 3 and the sealing cavity 4 to complete the sealing. After being used for a long time, the grease may reach the dripping point, and the grease changes from semi-solid to liquid. The spiral oil groove 3 is conducive to the smooth discharge of the liquid grease. After the liquid grease is discharged, it is collected through the funnel pipe 7. When the grease drips in the funnel pipe 7, the proximity switch 9 detects the liquid dripping signal and sends an electrical signal to the PLC controller. The PLC controller controls the buzzer to sound to remind the staff to inject new grease.

[0019] The above are only preferred examples of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing structure for a high-temperature ash discharge valve, characterized in that: It comprises a shaft sleeve (1), sealing packing rings (2) are installed at both ends of the shaft sleeve (1), a valve shaft (11) is inserted into the sealing packing ring (2), the valve shaft (11), the sealing packing ring (2), and the shaft sleeve (1) form a sealing cavity (4) with a ring-shaped cross section, grease is injected into the sealing cavity (4), a spiral oil groove (3) is opened on the inner wall of the shaft sleeve (1), and an oil filling hole (5) and an oil drain hole (6) are opened on the outer wall of the shaft sleeve (1), and the oil filling hole (5) and the oil drain hole (6) are both connected to the oil groove (3).

2. The sealing structure of a high temperature ash discharge valve according to claim 1, characterized in that: The thickness of the sealed cavity (4) is 5 mm to 10 mm.

3. The sealing structure of a high temperature ash discharge valve according to claim 1, characterized in that: The oil filling hole (5) and the oil drain hole (6) are both tapered holes.

4. The sealing structure of a high temperature ash discharge valve according to claim 1, characterized in that: A funnel material pipe (7) is installed at the oil discharge hole (6), and a ball valve (12) is installed on the funnel material pipe (7).

5. The sealing structure of a high temperature ash discharge valve according to claim 4, characterized in that: A side tube (8) is installed on the side wall of the funnel material tube (7), and a proximity switch (9) is installed in the side tube (8). The proximity switch (9) is electrically connected to a PLC controller, and the PLC controller is electrically connected to a buzzer.

6. The sealing structure of a high temperature ash discharge valve according to claim 5, characterized in that: A rounded corner (10) is provided at the intersection of the side tube (8) and the funnel material tube (7).

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