Packing sealing structure and screw conveyer

Abstract

The utility model provides a packing sealing structure and a screw conveyer, and aims to solve the technical problem that a packing sealing part of an existing screw conveyer is easy to leak. The screw conveyer comprises a packing sealing structure, and the packing sealing structure comprises a sealing seat; the pressing piece is arranged at one end of the sealing seat; an accommodating groove is formed between the pressing piece and the inner side of the sealing seat; the ventilation ring is arranged in the accommodating groove; sealing pieces are arranged at the two ends of the ventilation ring respectively; wherein an annular cavity is formed between the outer wall of the ventilation ring and the inner wall of the sealing seat, and an air inlet communicated with the cavity is formed in the sealing seat; an air ring groove communicated with the cavity is formed in the inner side of the ventilation ring. Through the structure of the graphite packing and the ventilation ring, frequent leakage of the packing seal can be avoided, and the service life of equipment is prolonged, so that the frequency of failure shutdown of the equipment is reduced, the continuous operation of the spiral conveyor is ensured, and meanwhile, the maintenance and purchase cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, in particular to a packing sealing structure and a screw conveyor. Background Art

[0002] Among powder conveying equipment, screw conveyors are more common. The normal operation of the packing seal of the screw conveyor is crucial to the continuous operation of the equipment. The existing packing seal structure is as follows: Figure 1 As shown, soft packing seals are usually used. During use, affected by the material, the packing seal of the screw conveyor will basically leak after about 72 hours of continuous operation. Leakage at the packing seal will cause the equipment to be unable to produce continuously normally, reduce production efficiency, and the leaked material is easy to float in the factory and pollute the environment. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a packing sealing structure and a screw conveyor, which solves the technical problem that the packing seal of the existing screw conveyor is prone to leakage.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A packing sealing structure comprises: a sealing seat; a pressing piece arranged at one end of the sealing seat; a receiving groove formed between the pressing piece and the inner side of the sealing seat; a ventilation ring arranged in the receiving groove; sealing pieces are respectively provided at both ends of the ventilation ring; wherein, an annular cavity is formed between the outer wall of the ventilation ring and the inner wall of the sealing seat, and an air inlet connected to the cavity is provided on the sealing seat; an air ring groove connected to the cavity is provided on the inner side of the ventilation ring.

[0006] The utility model improves the traditional packing seal into a structure of graphite packing and ventilation ring, which can avoid frequent leakage of the packing seal, extend the service life of the equipment, thereby reducing the number of equipment failure shutdowns, ensuring the continuous operation of the screw conveyor, and saving maintenance and procurement costs.

[0007] Optionally, the ventilation ring is arranged in the accommodating groove through two connecting rings, and the two connecting rings are respectively arranged at both ends of the ventilation ring, the outer diameter of the connecting ring is larger than the outer diameter of the ventilation ring, the outer wall of the connecting ring fits against the inner wall of the sealing seat, the sealing seat, the connecting ring and the ventilation ring form an annular cavity, and a sealing member is respectively provided at one end of the connecting ring away from the ventilation ring.

[0008] Optionally, the sealing seat is provided with a mounting hole for the shaft to pass through, the mounting hole is provided with an annular groove with a diameter larger than the mounting hole, the clamping piece is provided at one end of the annular groove, and the annular groove and the raised portion of the clamping piece form a receiving groove.

[0009] Optionally, the clamping member includes a pressure cover and a plurality of fixing bolts, the pressure cover has a protrusion, the outer diameter of the protrusion is adapted to the inner diameter of the annular groove, the pressure cover is connected to the sealing seat via fixing bolts, and the protrusion is pressed against the sealing member.

[0010] Optionally, a plurality of ventilation holes are provided on the ventilation ring, and the cavity is connected to the air ring groove through the plurality of ventilation holes.

[0011] Optionally, the plurality of ventilation holes are evenly distributed along the outer peripheral wall of the ventilation ring.

[0012] Optionally, the sealing element is a graphite packing.

[0013] Optionally, an air intake connector is provided on the air intake.

[0014] A screw conveyor comprises the packing sealing structure described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model provides a sealing structure suitable for a screw conveyor, which improves the traditional packing seal into a structure of graphite packing and a vent ring, can avoid frequent leakage of the packing seal, extend the service life of the equipment, thereby reducing the number of equipment failure shutdowns, ensuring the continuous operation of the screw conveyor, and saving maintenance and procurement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 It is a structural diagram of the prior art.

[0019] Figure 2 It is a structural schematic diagram of the packing sealing structure in the utility model.

[0020] Figure 3 This is a schematic diagram of the exploded structure of the packing seal structure in the present invention.

[0021] Figure 4 This is the front view of the packing sealing structure in the present utility model.

[0022] Figure 5 for Figure 4 Middle AA section view.

[0023] Figure 6 It is a side view of the packing sealing structure in the utility model.

[0024] Figure numerals: 1. Sealing seat; 11. Mounting hole; 12. Lug; 13. Cylindrical head screw; 2. Pressing piece; 21. Pressure cover; 211. Protrusion; 22. Fixing bolt; 3. Vent ring; 31. Cavity; 32. Air ring groove; 33. Vent hole; 4. Connecting ring; 5. Sealing piece; 6. Air inlet connector. DETAILED DESCRIPTION

[0025] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0027] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection, indirect connection through an intermediate medium, or internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0028] In the embodiments of the present utility model application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below", and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] like Figures 2 to 6 As shown, the embodiment of the present utility model application provides a packing sealing structure, including: a sealing seat 1, a pressing member 2, a ventilation ring 3, a connecting ring 4 and a sealing member 5.

[0033] A compression member 2 is mounted at one end of the sealing seat 1. Together, the compression member 2 and the inner side of the sealing seat 1 form a receiving groove within which are located a vent ring 3, a connecting ring 4, and a sealing member 5. Connecting rings 4 are connected to each end of the vent ring 3. Seals 5 are also located on the ends of the two connecting rings 4 facing away from the vent ring 3. One end of the compression member 2 abuts against one end of one of the seals, and the sealing member 5, connecting ring 4, and vent ring 3 are compressed within the receiving groove by the compression member 2.

[0034] Furthermore, an annular cavity 31 is formed between the outer wall of the vent ring 3 and the inner wall of the sealing seat 1. The sealing seat 1 is provided with an air inlet connected to the cavity 31. An air ring groove 32 is provided inside the vent ring 3. The annular cavity 31 is connected to the air ring groove 32 via multiple air holes 33 provided on the vent ring 3. During operation, air is introduced through the air inlet on the sealing seat 1. Once the air is connected, the vent ring 3 evenly distributes the air pressure along the circumference of the shaft, blowing away the material, preventing it from accumulating in the packing seal and causing leakage.

[0035] The vent ring 3 is disposed within the accommodating groove via two connecting rings 4, which are connected to both ends of the vent ring 3. Optionally, the outer diameter of the connecting ring 4 is larger than that of the vent ring 3, and the inner diameter of the connecting ring 4 is substantially equal to that of the vent ring 3. The outer wall of the connecting ring 4 fits against the inner wall of the sealing seat 1, and the sealing seat 1, the connecting ring 4, and the vent ring 3 form an annular cavity 31.

[0036] Specifically, the sealing seat 1 is provided with a mounting hole 11 for the shaft to pass through, and an annular groove with a diameter larger than the mounting hole 11 is provided in the mounting hole 11, which can also be understood as a step on the mounting hole 11. The pressing member 2 is provided at one end of the annular groove. The annular groove, the pressing member 2 and the shaft form a receiving groove, and the vent ring 3, the connecting ring 4 and the sealing member 5 are provided in the receiving groove, that is, the vent ring 3, the connecting ring 4 and the sealing member 5 are provided between the inner wall of the annular groove and the outer wall of the shaft, and the two connecting rings 4 are connected to the two ends of the vent ring 3 by multiple screws, and the sealing member 5 is provided at the end of the connecting ring 4 away from the vent ring 3, and the outer walls of the connecting ring 4 and the sealing member 5 are adapted to the inner wall of the annular groove, and the inner wall is adapted to the shaft. When in use, the inner walls of the connecting ring 4 and the sealing member 5 are attached to the outer wall of the shaft, and there is a gap between the vent ring groove 32 and the outer wall of the shaft.

[0037] Optionally, the sealing seat 1 comprises an upper and lower body connected to each other. Matching lugs 12 are provided at corresponding ends of the upper and lower bodies. Screw holes are provided in the lugs 12, and the upper and lower bodies are fixedly connected using cylindrical head screws 13. In actual use, sealant is applied to the joints of the sealing seat 1. After the sealing seat 1 and the gland 21 are in full contact, they are circumferentially welded.

[0038] Optionally, a plurality of ventilation holes 33 are evenly formed on the outer peripheral wall of the ventilation ring 3 , one end of the ventilation hole 33 is connected to the cavity 31 , and the other end is connected to the air ring groove 32 .

[0039] Optionally, the compression member 2 includes a gland 21 and a plurality of fixing bolts 22. The gland 21 has a raised portion 211, the outer diameter of which matches the inner diameter of the annular groove, and the raised portion 211 can abut against the seal 5. A plurality of through-holes are defined on the gland 21 outside the raised portion 211, and the sealing seat 1 has connecting holes corresponding in position to the through-holes. The fixing bolts 22 pass through the through-holes and connect to the connecting holes. That is, the gland 21 is connected to the sealing seat 1 via the plurality of fixing bolts 22, and the raised portion 211 compresses the seal 5. Optionally, a gasket is provided between the fixing bolts 22 and the gland 21.

[0040] Optionally, the sealing member 5 is a graphite packing.

[0041] Optionally, the air inlet is provided with an air inlet connector 6. The air inlet connector 6 can be a straight-through air quick connector.

[0042] When in use, air is introduced into the annular cavity 31 through the air inlet joint 6 provided on the sealing seat 1 using a quick joint, and then the gas is blown onto the circumference of the shaft through the air hole 33 on the air ring 3 and the air ring groove 32, so that the material is blown away by the air to avoid material accumulation at the packing seal and causing leakage.

[0043] Example 2

[0044] The embodiment of the present utility model application provides a screw conveyor, including the packing seal structure described in embodiment 1. When in use, the setting of the sealing structure can not only prevent frequent leakage of the packing seal, extend the continuous operation cycle of the equipment, thereby ensuring the continuous operation of the screw conveyor, but also save maintenance and procurement costs.

[0045] Parts not described in detail in this embodiment are well-known technologies in the art.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A packing sealing structure, characterized in that: include: Sealing seat (1); A pressing member (2) is provided at one end of the sealing seat (1); An accommodating groove is formed on the inner side of the pressing member (2) and the sealing seat (1); A vent ring (3) is arranged in the accommodating groove; Sealing members (5) are respectively provided at both ends of the vent ring (3); An annular cavity (31) is formed between the outer wall of the vent ring (3) and the inner wall of the sealing seat (1); an air inlet communicating with the cavity (31) is provided on the sealing seat (1); and an air ring groove (32) communicating with the cavity (31) is provided on the inner side of the vent ring (3).

2. The packing seal structure according to claim 1, characterized in that: The vent ring (3) is arranged in the accommodating groove through two connecting rings (4). The two connecting rings (4) are respectively arranged at both ends of the vent ring (3). The outer diameter of the connecting ring (4) is larger than the outer diameter of the vent ring (3). The outer wall of the connecting ring (4) is in contact with the inner wall of the sealing seat (1). The sealing seat (1), the connecting ring (4) and the vent ring (3) form an annular cavity (31). A sealing member (5) is provided at one end of the connecting ring (4) away from the vent ring (3).

3. The packing seal structure according to claim 1, characterized in that: The sealing seat (1) is provided with a mounting hole (11) for the shaft to pass through, and an annular groove having a diameter larger than that of the mounting hole (11) is provided in the mounting hole (11). The pressing member (2) is provided at one end of the annular groove, and the annular groove and the raised portion (211) of the pressing member (2) form a receiving groove.

4. The packing seal structure according to claim 3, characterized in that: The pressing member (2) includes a pressure cover (21) and a plurality of fixing bolts (22). The pressure cover (21) has a protrusion (211). The outer diameter of the protrusion (211) is adapted to the inner diameter of the annular groove. The pressure cover (21) is connected to the sealing seat (1) via the fixing bolts (22). The protrusion (211) is pressed against the sealing member (5).

5. The packing seal structure according to claim 1, characterized in that: The ventilation ring (3) is provided with a plurality of ventilation holes (33), and the cavity (31) is connected to the air ring groove (32) through the plurality of ventilation holes (33).

6. The packing seal structure according to claim 5, characterized in that: A plurality of vent holes (33) are evenly distributed along the outer peripheral wall of the vent ring (3).

7. The packing seal structure according to claim 1, characterized in that: The sealing member (5) is a graphite packing.

8. The packing seal structure according to claim 1, characterized in that: An air intake connector (6) is provided on the air intake.

9. A screw conveyor, characterized in that: The invention comprises the packing sealing structure according to any one of claims 1 to 8.

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