Conveying screw sealing device and conveying equipment

Abstract

The utility model relates to the technical field of sealing devices for conveying, in particular to a conveying screw sealing device and conveying equipment, the sealing device comprises a connecting end cover arranged on a conveying screw in a sleeving mode and a sealing structure arranged on the connecting end cover, and the sealing structure comprises a graphite sealing ring connected to the connecting end cover in an abutting mode; the end, away from the connecting end cover, of the sealing structure is provided with a pressing structure and a sealing structure, the pressing structure comprises a limiting block arranged on the conveying screw, the limiting block is provided with a plurality of guide columns facing the graphite sealing ring, the guide columns are correspondingly sleeved with pressing springs, and the pressing springs abut against the graphite sealing ring. According to the sealing structure, the graphite sealing ring abuts against the limiting block of the pressing structure and the pressing spring so that the graphite sealing ring can be tightly attached to the connecting position for sealing, after the graphite sealing ring is abraded, the pressing spring can push the graphite sealing ring to the connecting position to seal a gap, and therefore the sealing effect is guaranteed, and the service life of the sealing structure is effectively prolonged; the replacement period is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of conveying sealing devices, and in particular to a conveying screw sealing device and conveying equipment. Background Art

[0002] The conveying screw is a device widely used in the conveying field. It includes a frame and a screw arranged in the frame. When conveying materials, the pressure and shear force generated by the rotation of the screw are used to fully mix the materials and then output them from the discharge port. The driving end of the conveying screw needs to be sealed to prevent the material from leaking out from there. Conventional conveying screws use rubber rings to seal the driving end. However, since the conveying screw will rotate continuously, the rotation of the conveying screw will continuously drive the material to wear the rubber ring. The side of the rubber ring facing the material will soon be worn and a gap will appear. The material leaks out from the gap, resulting in a short service life of this sealing structure. The sealing structure needs to be replaced frequently, which is time-consuming and labor-intensive. Utility Model Content

[0003] In order to improve the problem in the related art that the sealing structure has a short service life and needs to be frequently replaced, the utility model provides a conveying screw sealing device and a conveying equipment.

[0004] On the one hand, the present application provides a conveying screw sealing device, including a connecting end cover sleeved on the conveying screw and a sealing structure arranged on the connecting end cover, the sealing structure including a graphite sealing ring abutting against the connecting end cover; the sealing structure is provided with a clamping structure and a closing structure at one end away from the connecting end cover, the clamping structure including a limit block arranged on the conveying screw, the limit block being provided with a plurality of guide columns facing the graphite sealing ring, the guide columns being correspondingly sleeved with a clamping spring, and the clamping spring abutting against the graphite sealing ring.

[0005] Furthermore, a plurality of Gley sealing rings are arranged inside the graphite sealing ring, and the plurality of Gley sealing rings are arranged along the length direction of the conveying screw.

[0006] Furthermore, the guide column is arranged along the circumferential direction of the limiting block.

[0007] Furthermore, the closed structure includes a bearing seat and a closed end cover arranged on a side of the clamping structure away from the sealing structure, and a bearing member sleeved on the conveying screw is arranged in the bearing seat.

[0008] Furthermore, an energy storage plug seal is provided between the bearing seat and the limit block to increase the airtightness; the energy storage plug seal has an inner sealing ring and an outer sealing ring, the inner sealing ring is sleeved on the limit block, the outer sealing ring abuts against the bearing seat, and an energy storage spring is provided between the inner sealing ring and the outer sealing ring.

[0009] Furthermore, the closed end cover is provided with a water inlet hole and a water return hole, and a cooling channel is opened on one side of the closed end cover close to the bearing seat, the water inlet hole is located at one end of the cooling channel, and the water return hole is located at the other end of the cooling channel.

[0010] On the other hand, the present application provides a conveying device, including a frame, a conveying screw arranged on the frame, and a driving device for driving the conveying screw, a sealing device is arranged between the conveying screw and the driving device, and the sealing device is a conveying screw sealing device as described in any of the above items.

[0011] The utility model has the following advantages:

[0012] 1. The utility model provides a conveying screw sealing device, which adopts a graphite sealing ring to seal the connection by setting a sealing structure and a compression structure, and utilizes the advantage that the graphite sealing ring can withstand high temperature and high pressure to increase the applicability and stability of the sealing structure; adopts a limit block and a compression spring of the compression structure to press the graphite sealing ring, so that the graphite sealing ring is tightly attached to the connection for sealing; when the graphite sealing ring is worn, the compression spring will push the graphite sealing ring to the connection to close the gap to ensure the sealing effect, thereby effectively increasing the service life of the sealing structure and extending the replacement cycle.

[0013] 2. A guide column is provided on the limit block of the conveying screw sealing device. Under the guidance of the guide column, the compression spring can ensure that a thrust in the correct direction is applied to the graphite sealing ring to avoid the dislocation of the graphite sealing ring and affect the sealing effect.

[0014] 3. An energy storage plug seal is provided between the bearing seat and the limit block of the closed structure. By providing the energy storage plug seal, the airtightness can be increased on the basis of the sealing structure to prevent materials from entering the bearing seat and affecting the bearing parts. At the same time, the energy storage plug seal adopts a structure in which an energy storage spring is provided between the outer sealing ring and the inner sealing ring. Under the action of the energy storage spring, the outer sealing ring and the inner sealing ring will continuously press against the limit block and the bearing seat, and the sealing effect can be guaranteed even in the case of long-term operation.

[0015] 4. The conveying screw will generate a lot of heat during operation, and the heat will be transferred to the drive device and cause an impact. By providing a water inlet hole, a water return hole and a cooling channel on the closed end cover, the connection between the conveying screw and the drive device can be cooled, thereby reducing the impact on the drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0017] Figure 1 This is a cross-sectional schematic diagram of a conveying screw sealing device according to an embodiment of the present application;

[0018] Figure 2 This is a cross-sectional schematic diagram of a conveying screw sealing device in accordance with an embodiment of the present application when it cooperates with a conveying screw;

[0019] Figure 3 for Figure 2 A partial enlarged schematic diagram of part A;

[0020] Figure 4 It is a front view of a closed end cover in a conveying screw sealing device;

[0021] Figure 5 This is a schematic diagram of the structure of the conveying screw sealing device when it is installed in the conveying equipment.

[0022] Description of reference numerals:

[0023] 1. Connecting end cover; 2. Sealing structure; 21. Graphite sealing ring; 22. Gray sealing ring; 3. Compression structure; 31. Limit block; 311. Guide column; 32. Compression spring; 4. Closing structure; 41. Bearing seat; 42. Closing end cover; 421. Water inlet hole; 422. Water return hole; 423. Cooling channel; 43. Bearing component; 44. Energy storage plug seal; 441. Energy storage spring. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] Reference Figure 1 and Figure 2 On the one hand, the present application provides a conveying screw sealing device, including a connecting end cover 1 sleeved on the conveying screw and a sealing structure 2 arranged on the connecting end cover 1, and a clamping structure 3 and a closing structure 4 are arranged at one end of the sealing structure 2 away from the connecting end cover 1. The clamping mechanism is used to press the sealing structure 2 to the connecting end cover 1 to ensure airtightness, and the closing structure 4 is used to seal the end of the conveying screw.

[0031] Specifically, the connecting end cover 1 is provided with a through hole for cooperating with the conveying screw. After the conveying screw is passed through the connecting end cover 1, it cooperates with the sealing structure 2 and the clamping structure 3. It can be understood that the connecting end cover 1 can specifically be a part separately arranged on one side of the conveying screw, and the connecting end cover 1 can specifically be a part of the conveying screw itself.

[0032] The sealing structure 2 includes a graphite sealing ring 21 abutting against one side of the connecting end cover 1. The diameter of the graphite sealing ring 21 is larger than the diameter of the through hole of the connecting end cover 1. The graphite sealing ring 21 is sleeved on the conveying screw. In addition, a plurality of Gley sealing rings 22 are arranged inside the graphite sealing ring 21 to increase the sealing performance. In this embodiment, there are two Gley sealing rings 22, which are sleeved on the conveying screw and arranged along the length direction of the conveying screw.

[0033] The clamping structure 3 includes a limit block 31 arranged on the conveying screw, and the limit block 31 is arranged at the shoulder of the conveying screw to achieve positioning. The limit block 31 is provided with a plurality of guide posts 311 facing the graphite sealing ring 21, and the guide posts 311 are sleeved with a clamping spring 32, and the clamping spring 32 is pressed against the graphite sealing ring 21. In this embodiment, the guide posts 311 are arranged along the circumferential direction of the limit block 31, and the number of the clamping springs 32 is the same as the number of the guide posts 311 and corresponds one to one. One end of the clamping spring 32 is fixedly connected to the limit block 31, and the other end of the clamping spring 32 is pressed against the graphite sealing ring 21, and the clamping spring 32 applies a force to the graphite sealing ring 21 that continuously approaches the connection end cover 1.

[0034] By such arrangement, when the graphite sealing ring 21 is worn, the compression spring 32 will push the graphite sealing ring 21 to the connection to close the gap to ensure the sealing effect, thereby effectively increasing the service life of the sealing structure 2 and extending the replacement cycle. At the same time, under the guidance of the guide column 311, the compression spring 32 can ensure that a thrust in the correct direction is applied to the graphite sealing ring 21, thereby avoiding the situation where the compression spring 32 applies forces in different directions to the graphite sealing ring 21, causing the graphite sealing ring 21 to be misplaced and affecting the sealing effect.

[0035] The closed structure 4 includes a bearing seat 41 and a closed end cover 42 arranged on the side of the pressing structure 3 away from the sealing structure 2. A bearing member 43 sleeved on the conveying screw is arranged in the bearing seat 41. In this embodiment, the bearing seat 41 is located outside the limit block 31. In order to further increase the airtightness and prevent the material from entering the bearing member 43, an energy storage plug seal 44 for increasing the airtightness is arranged between the bearing seat 41 and the limit block 31.

[0036] Reference Figure 2 and Figure 3 The energy storage plug seal 44 has an inner sealing ring and an outer sealing ring. The inner sealing ring is sleeved on the limit block 31, and the outer sealing ring is against the bearing seat 41. An energy storage spring 441 is arranged between the inner sealing ring and the outer sealing ring. The energy storage spring 441 will continuously exert a force to separate the inner sealing ring and the outer sealing ring from each other, so that the inner sealing ring is pressed against the limit block 31, and the outer sealing ring is pressed against the bearing seat 41 to ensure sealing. Under the action of the energy storage plug seal 44, the normal and stable use of the bearing member 43 can be guaranteed in the case of long-term operation.

[0037] Reference Figure 4 , the conveying screw will generate a lot of heat during use, or it needs to run at a certain temperature during the conveying process according to the process. The heat will affect the environment and personnel, and if the heat is transferred to the drive device along the driving path, it is easy to affect the normal operation of the drive device. In order to cool the connection between the conveying screw and the drive device, the closed end cover 42 is provided with a water inlet hole 421 and a water return hole 422. A cooling channel 423 is provided on the side of the closed end cover 42 close to the bearing seat 41. The water inlet hole 421 is located at one end of the cooling channel 423, and the water return hole 422 is located at the other end of the cooling channel 423. Through such a setting, the water inlet hole 421 and the water return hole 422 are connected to an external water supply device, and the cooling water will flow continuously in the cooling channel 423, thereby cooling the connection and reducing the impact of heat.

[0038] Reference Figure 5On the other hand, the present application provides a conveying device, including a frame, a conveying screw arranged on the frame, and a driving device for driving the conveying screw, a sealing device is arranged between the conveying screw and the driving device, and the sealing device is a conveying screw sealing device as described above.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A conveying screw sealing device, characterized in that: The invention comprises a connecting end cover (1) sleeved on a conveying screw and a sealing structure (2) arranged on the connecting end cover (1), wherein the sealing structure (2) comprises a graphite sealing ring (21) abutting against the connecting end cover (1); a clamping structure (3) and a closing structure (4) are arranged at one end of the sealing structure (2) away from the connecting end cover (1), wherein the clamping structure (3) comprises a limit block (31) arranged on the conveying screw, wherein the limit block (31) is provided with a plurality of guide posts (311) facing the graphite sealing ring (21), wherein the guide posts (311) are sleeved with corresponding clamping springs (32), and the clamping springs (32) are pressed against the graphite sealing ring (21).

2. A conveying screw sealing device according to claim 1, characterized in that: A plurality of Gley sealing rings (22) are also arranged inside the graphite sealing ring (21), and the plurality of Gley sealing rings (22) are arranged along the length direction of the conveying screw.

3. A conveying screw sealing device according to claim 1, characterized in that: The guide column (311) is arranged along the circumferential direction of the limiting block (31).

4. A conveying screw sealing device according to any one of claims 1 to 3, characterized in that: The closed structure (4) comprises a bearing seat (41) and a closed end cover (42) arranged on a side of the pressing structure (3) away from the sealing structure (2), and a bearing member (43) sleeved on the conveying screw is arranged in the bearing seat (41).

5. A conveying screw sealing device according to claim 4, characterized in that: An energy storage plug seal (44) for increasing airtightness is arranged between the bearing seat (41) and the limit block (31); the energy storage plug seal (44) comprises an inner sealing ring and an outer sealing ring, the inner sealing ring is sleeved on the limit block (31), the outer sealing ring abuts against the bearing seat (41), and an energy storage spring (441) is arranged between the inner sealing ring and the outer sealing ring.

6. A conveying screw sealing device according to claim 4, characterized in that: The closed end cover (42) is provided with a water inlet hole (421) and a water return hole (422); a cooling channel (423) is provided on a side of the closed end cover (42) close to the bearing seat (41); the water inlet hole (421) is located at one end of the cooling channel (423), and the water return hole (422) is located at the other end of the cooling channel (423).

7. A conveying device, characterized in that: It comprises a frame, a conveying screw arranged on the frame and a driving device for driving the conveying screw, a sealing device is arranged between the conveying screw and the driving device, and the sealing device is the conveying screw sealing device as described in any one of claims 1-6.

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