Sealing structure for discharge hole of vacuum screening equipment

Abstract

The utility model provides a sealing structure for a discharge port of vacuum screening equipment, which relates to the technical field of screening equipment and comprises a discharge port connected with a discharge hose, the lower end of the discharge hose is connected with a sealing valve port, and the sealing valve port comprises a valve seat, a sealing ring, a sliding circular truncated cone and two abutting half buckles which are symmetrically buckled. A positioning skirt edge is integrally formed on the upper side of the outer edge of the valve seat, the positioning skirt edge extends upwards to form a sliding ring, a sealing groove is formed between the sliding ring and the outer wall of the valve seat, the sealing ring is placed in the sealing groove and arranged on the outer wall of the discharging hose in a sleeving mode, and the sliding circular truncated cone is inserted into the inner wall of the sliding ring in a sliding mode. The lower end of the sliding circular truncated cone abuts against the sealing ring. The two abutting half buckles are buckled to the positioning skirt edge in a clamped mode. The abutting half buckles abut against the sliding circular truncated cone. The abutting half buckle abuts against the sliding circular truncated cone to extrude the sealing ring in a sliding mode, and the purpose of sealing the discharging hose and the valve seat is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of screening equipment, in particular to a closed structure for a discharge port of vacuum screening equipment. Background Art

[0002] With the expansion of high-performance material technology, more and more high-temperature resistant special resins are being used in aerospace, electronics, protection, and energy fields. The particles used for melt spinning generally need to be dried. In order to improve the uniformity and effectiveness of drying during the process, they need to be turned or stirred. This process will produce a large amount of dust and fine particles (triangle materials), and these tiny particles will seriously affect the spinning quality and the smooth progress of spinning, so they need to be cleaned.

[0003] General screening or air blowing technology will cause secondary moisture regain, affecting the drying effect, increasing the moisture content of the material, and affecting the stability of spinning. Therefore, the cleaning of such materials must be carried out in a closed environment (either a vacuum environment or a nitrogen protection environment).

[0004] In order to keep the material from being oxidized and exposed to water-containing gas during the entire screening process, a stainless steel material barrel is usually connected to the discharge port to collect the material. However, when the stainless steel material barrel is replaced, the discharge port will come into contact with the outside air, destroying the sealing of the entire screening system. The outside air will enter the vacuum negative pressure screening equipment, causing the material in the screening equipment to come into contact with the air, thereby increasing the water content of the material, affecting the stability of spinning, and easily causing problems such as unstable product fluidity, insufficient screening, and increased moisture content, affecting product quality. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a closed structure for a discharge port of a vacuum screening device, which solves the problems raised in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A closed structure for the discharge port of a vacuum screening device comprises a screening frame, the discharge port of the screening frame is connected to a discharge hose, the lower end of the discharge hose is connected to a sealing valve port, the sealing valve port comprises a valve seat, a sealing ring, a sliding cone and two symmetrically buckled abutting half buckles, a positioning skirt is integrally formed on the upper side of the outer edge of the valve seat, a sliding ring is extended upward from the positioning skirt, a sealing groove is formed between the sliding ring and the outer wall of the valve seat, the lower end of the discharge hose is plugged into the sealing groove, and the sealing ring is placed In the sealing groove and sleeved on the outer wall of the discharge hose, the sliding table is slidably inserted on the inner wall of the sliding ring, the lower end of the sliding table is in contact with the sealing ring, the upper part of the sliding table is set to a cone shape, the two contact half buckles are snap-fitted on the positioning skirt, and a positioning convex ring is provided on the lower side of the inner wall of the contact half buckle. The positioning convex ring is snapped on the lower side of the positioning skirt, and a contact convex ring is provided on the upper part of the inner wall of the contact half buckle. The contact convex ring slides and contacts on the inclined surface of the cone of the sliding table.

[0010] Preferably, connecting pieces are provided at both ends of the two interfering half buckles, the connecting pieces of the two interfering half buckles interfere with each other, and the two connecting pieces are connected by bolts.

[0011] Preferably, a sliding inclined surface is provided on the side of the abutting convex ring abutting against the sliding truncated table, and the inclination of the sliding inclined surface is greater than the inclination of the outer edge of the sliding truncated table.

[0012] Preferably, a sealing valve shaft is rotatably connected to the middle portion of the valve seat, and a sealing valve plate for opening and closing the valve seat is rotatably connected to the sealing valve shaft.

[0013] Preferably, a transmission gear is provided at the end of the sealing valve shaft, a sliding frame is slidingly connected to the outer wall of the valve seat, a sliding spring is connected between the sliding frame and the positioning skirt, and a sliding rack meshing with the transmission gear is installed on the inner wall of the sliding frame.

[0014] Preferably, the lower end of the valve seat is fixedly connected to a positioning beam, a sliding groove is slidably connected to the positioning beam, a connecting rod is hinged to the rear side of the sliding groove, and the end of the connecting rod away from the sliding groove is hinged to the sliding frame.

[0015] Preferably, a limiting groove is provided on the rear side of the sliding groove piece, and a limiting protrusion is provided on the positioning beam piece. The limiting groove is slidingly connected to the limiting protrusion, and a return spring is provided between the limiting protrusion and the inner wall of the limiting groove.

[0016] Preferably, a plurality of positioning screws are rotatably connected to the positioning beam, and the positioning screws are threadedly connected to the lower end of the valve seat.

[0017] (3) Beneficial effects

[0018] The utility model provides a closed structure for the discharge port of a vacuum screening device, which has the following beneficial effects:

[0019] 1. In the present invention, the bolt is rotated to gradually engage the half-button, and the sliding table slides downward through the sliding of the friction convex ring and squeezes the sealing ring, so that the sealing ring is deformed laterally and squeezed on the outer wall of the discharge hose, thereby completing the sealing between the discharge hose and the valve seat.

[0020] 2. In the present invention, when the stainless steel material barrel is placed directly below the valve seat, the sliding groove will slide backward against the outer wall of the stainless steel material barrel, and the sliding frame will be pulled by the connecting rod, and the sealing valve disc will be rotated and opened through the mutually meshing transmission gear and sliding rack, so that the stainless steel material barrel is connected to the discharge port; similarly, in the process of taking out the stainless steel material barrel, the sliding groove is reset under the action of the reset spring, and the sealing valve disc rotates to close the valve seat, isolating the outside air from the discharge port, preventing air from entering the screening equipment from the discharge port. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the sealing valve port in the utility model;

[0022] Figure 2 It is a cross-sectional view of the sealing valve port in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the valve seat in this utility model.

[0024] In the figure: 1. discharge hose; 2. valve seat; 3. sealing ring; 4. sliding cone; 5. abutment half buckle; 6. connecting piece; 7. positioning skirt; 8. sliding ring; 9. positioning convex ring; 10. abutment convex ring; 11. sealing valve shaft; 12. sealing valve plate; 13. transmission gear; 14. sliding frame; 15. sliding spring; 16. sliding rack; 17. positioning beam; 18. positioning screw; 19. sliding groove; 20. connecting rod; 21. limiting protrusion; 22. return spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] The embodiment of the utility model provides a closed structure of the discharge port of a vacuum screening device.

[0027] like Figure 1-3As shown, it includes a screening frame, the discharge port of the screening frame is connected to a discharge hose 1, the lower end of the discharge hose 1 is connected to a sealing valve port, the sealing valve port includes a valve seat 2, a sealing ring 3, a sliding cone 4 and two symmetrically buckled conflicting half buckles 5, and the two ends of the two conflicting half buckles 5 are provided with connecting pieces 6. The connecting pieces 6 of the two conflicting half buckles 5 conflict with each other, and the two connecting pieces 6 are connected by bolts. By turning the bolts, the two conflicting half buckles 5 can be gradually buckled, clamped and fixed on the valve seat 2. The upper side of the outer edge of the valve seat 2 is integrally formed with a positioning skirt 7, and the positioning skirt 7 extends upward There is a sliding ring 8, and a sealing groove is formed between the sliding ring 8 and the outer wall of the valve seat 2. The lower end of the discharge hose 1 is inserted in the sealing groove. The sealing ring 3 is placed in the sealing groove and sleeved on the outer wall of the discharge hose 1. The sliding cone 4 is slidingly inserted on the inner wall of the sliding ring 8. The sliding cone 4 includes an integrally formed sliding portion and a cone portion. The sliding portion is slidingly inserted on the inner side of the sliding ring 8. The cone portion is set to a cone shape. The diameter of the lower end of the cone portion is larger than the inner diameter of the sliding ring 8 and protrudes from the sliding ring 8. The lower end of the sliding cone 4 contacts the sealing ring 3. The upper part of the sliding cone 4 is set It is a truncated cone shape, and the two said conflicting half buckles 5 are snap-fitted and buckled onto the positioning skirt 7. A positioning convex ring 9 is provided on the lower side of the inner wall of the conflicting half buckle 5, and the said positioning convex ring 9 is snapped onto the lower side of the positioning skirt 7. A conflicting convex ring 10 is provided on the upper part of the inner wall of the conflicting half buckle 5. The said conflicting convex ring 10 slides and conflicts on the truncated cone inclined surface of the sliding cone 4. A sliding inclined surface is provided on one side of the conflicting convex ring 10 that conflicts with the sliding cone 4. The inclination of the sliding inclined surface is greater than the inclination of the outer edge of the sliding cone 4. The positioning convex ring 9 is snapped onto the lower side of the positioning skirt 7, and the conflicting convex ring 10 conflicts on the upper side of the sliding cone 4. The height of the resistance half buckle 5 forms a positioning, which can ensure that the resistance half buckle 5 is positioned and installed at the position of the positioning skirt 7. In the process of gradually clamping the resistance half buckle 5, the resistance convex ring 10 is in resistance and slides on the inclined outer wall of the sliding cone 4, and the sliding cone 4 slides downward and squeezes on the sealing ring 3. The inner and outer sides of the sealing ring 3 respectively resist the inner wall of the sliding ring 8 and the outer wall of the discharge hose 1. The sealing ring 3 is laterally deformed and squeezed on the outer wall of the discharge hose 1 under the extrusion of the sliding cone 4, so that the discharge hose 1 fits tightly on the outer wall of the valve seat 2 to form a seal, effectively avoiding the occurrence of an installation gap between the discharge hose 1 and the valve seat 2.

[0028] The middle part of the valve seat 2 is rotatably connected with a sealing valve shaft 11, and the sealing valve disc 12 for opening and closing the valve seat 2 is rotatably connected to the sealing valve shaft 11. Rotating the sealing valve disc 12 can open and connect the lower end of the valve seat 2 with the discharge port. A transmission gear 13 is provided at the end of the sealing valve shaft 11, and a mounting groove is provided on the outer wall of the valve seat 2. A sliding frame 14 is slidingly connected in the mounting groove, and a sliding spring 15 is connected between the sliding frame 14 and the positioning skirt 7. A sliding rack 16 meshing with the transmission gear 13 is installed on the inner wall of the sliding frame 14, which pushes the sliding frame 14 to slide in the mounting groove. The transmission gear 13 can be rotated by the sliding rack 16, thereby opening and closing the sealing valve disc 12.

[0029] The lower end of the valve seat 2 is fixedly connected to a positioning beam 17, and the positioning beam 17 is rotatably connected to a plurality of positioning screws 18. The positioning screws 18 are threadedly connected to the lower end of the valve seat 2. Rotating the positioning screws 18 can adjust the distance between the positioning beam 17 and the lower end of the valve seat 2, so that when the stainless steel material barrel is placed on the positioning beam 17, the barrel mouth of the stainless steel material barrel can be tightly connected with the lower end of the valve seat 2 to avoid leakage. The positioning beam 17 is slidably connected to a sliding groove 19, and the rear side of the sliding groove 19 is hinged with a connecting rod 20. The end of the connecting rod 20 away from the sliding groove 19 is hinged on the sliding frame 14. When the stainless steel material barrel is placed on the positioning beam 17, the side wall of the stainless steel material barrel will resist the sliding groove 19, causing the sliding groove 19 to move backward, and the sliding frame 14 is pulled downward by the hinged connecting rod 20, so that the sealing valve disc 12 is rotated to open, so that the discharge port is connected to the stainless steel material barrel.

[0030] A limiting groove is provided on the rear side of the sliding groove piece 19, and a limiting protrusion 21 is provided on the positioning beam piece 17. The limiting groove is slidingly connected to the limiting protrusion 21. A return spring 22 is provided between the limiting protrusion 21 and the inner wall of the limiting groove. The limiting protrusion 21 plays a limiting role on the sliding groove piece 19, so that the sliding groove piece 19 can slide horizontally on the positioning beam piece 17.

[0031] It is further configured that a connecting hole is opened on the valve seat 2, the connecting hole is connected to an inert gas protection tube, the connecting hole is arranged below the sealing valve plate 12, a pressure sensor is fixed on the limiting protrusion 21, the return spring 22 is connected between the sliding groove plate 19 and the pressure sensor, and the pressure sensor is electrically connected to the inert gas protection tube.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed discharge port structure for vacuum screening equipment, comprising a screening frame, the discharge port of which is connected to a discharge hose, characterized in that: The cam is secured to the valve body by means of a camming mechanism, and the camming mechanism is adapted to engage the valve body's outer wall and engage with the valve stem to effect the camming of the valve stem. The cam is fixedly provided with a toothed plate on the top of the valve stem, and the toothed plate is connected with the toothed plate on the bottom of the valve stem to form a toothed structure.

2. A closed discharge port structure for vacuum screening equipment according to claim 1, characterized in that: Connecting pieces are provided at both ends of the two abutting half buckles, the connecting pieces of the two abutting half buckles abut each other, and the two connecting pieces are connected by bolts.

3. A closed discharge port structure for vacuum screening equipment according to claim 2, characterized in that: A sliding inclined surface is provided on one side of the abutting convex ring abutting against the sliding truncated table, and the inclination of the sliding inclined surface is greater than the inclination of the outer edge of the sliding truncated table.

4. A closed discharge port structure for vacuum screening equipment according to claim 3, characterized in that: A plurality of positioning screws are rotatably connected to the positioning beam, and the positioning screws are threadedly connected to the lower end of the valve seat.

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