Mechanical device with shaft seal

Abstract

The application discloses a mechanical equipment with shaft sealing, which comprises a casing, a sleeve, a shaft and a sealing piece, wherein the casing is provided with a first opening; one end of the sleeve is connected with the first opening and comprises an air inlet hole penetrating through the sleeve in a radial direction, the air inlet hole being used for connecting with an air blower; the shaft is inserted into the sleeve from the casing and is in clearance fit with the sleeve; the sealing piece is annular or cylindrical, is sleeved on the shaft and is clamped between the sleeve and the shaft and located on a side of the air inlet hole away from the casing. The mechanical equipment with shaft sealing is applied to a gypsum dry material production system and can form double-layer sealing in a plaster of paris screw conveyor and accelerate plaster of paris aging.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of shaft sealing equipment, and more specifically, to a mechanical device that employs annular airflow to seal a rotating shaft. Background Technology

[0002] The gypsum board production line's batching system includes dry and liquid (wet) systems. In the dry system, the gypsum powder output after roasting is between 140 and 150 degrees Celsius. Current technology uses a conveyor belt to transport this high-temperature gypsum powder to a sealed chamber for aging. While the high-temperature gypsum powder can cool down by about 10 degrees Celsius in the sealed chamber, the powder exiting the chamber continues into the cooling equipment. However, the high-temperature airflow carried by the gypsum powder damages the cooling equipment, and the equipment cannot completely cool the powder.

[0003] In existing technology, gypsum powder screw conveyors include a screw conveyor cutter and a sealed chamber. The shafts at both ends of the screw conveyor cutter engage with through holes on the two walls of the sealed chamber and rotate continuously within these holes to convey gypsum powder. A sealed connection is established between the shafts at both ends of the screw conveyor cutter and the sealed chamber to accelerate the aging process of the gypsum powder. However, as the screw conveyor cutter continuously conveys gypsum powder for extended periods, wear occurs between the shafts at both ends of the screw conveyor cutter and the through holes on the two walls of the sealed chamber, leading to a decrease in sealing performance. This results in material leakage from the gypsum powder screw conveyor, causing on-site pollution. Furthermore, the deterioration of the sealing performance at both ends of the screw conveyor cutter reduces the aging effect of the gypsum powder, resulting in unstable gypsum composition output from the sealed chamber. This, in turn, causes instability in the performance of the gypsum slurry at the batching station, affecting the normal operation of the production line. Summary of the Invention

[0004] The shaft sealing mechanical equipment of the gypsum board dry material system provided in this application embodiment sets a rotating airflow between the shaft and the sleeve for secondary sealing, ensuring the sealing performance of the gypsum powder conveyor. Excess gas enters the shell and can accelerate the aging of gypsum powder materials, thereby ensuring on-site hygiene and accelerating the aging of calcined gypsum.

[0005] The technical solution of the mechanical device with shaft seal in this application embodiment is as follows:

[0006] A mechanical device with a shaft seal, used in a gypsum board dry material system, the mechanical device comprising:

[0007] The casing has a first opening, through which gypsum powder is conveyed for cooling and aging.

[0008] A sleeve, one end of which is connected to the first opening, includes an air inlet that radially penetrates the sleeve, the air inlet being used to connect an external fan;

[0009] A shaft is inserted from the housing into the sleeve, and has a clearance fit with the sleeve; and

[0010] The seal is constructed in the form of a ring or a cylinder. The seal is sleeved on the shaft and sandwiched between the sleeve and the shaft, located on the side of the air inlet facing away from the housing.

[0011] The inner circumferential wall of the sleeve is provided with an annular groove, and the air inlet extends from the annular groove to the outer circumferential wall of the sleeve; the annular space between the shaft and the sleeve forms an annular air chamber, which can perform secondary sealing to ensure the sealing performance of the housing; part of the gas entering the annular air chamber from the air inlet enters the interior of the housing, and the side of the housing opposite to the first opening is also provided with an exhaust device, which is used to discharge the airflow entering the housing and accelerate the aging of the gypsum powder.

[0012] In some exemplary embodiments, the mechanical device further includes a fan, an air pipe, and a ball valve; the fan includes an air inlet and an air outlet;

[0013] The air outlet is connected to one end of the air pipe, and the other end of the air pipe is connected to the air inlet, for supplying airflow to the air inlet; the ball valve is installed on the air pipe, and the ball valve can adjust the airflow rate.

[0014] In some exemplary embodiments, the blower is a Roots blower.

[0015] In some exemplary embodiments, multiple air inlets are provided, and multiple air outlets are provided for the air pipes, with the air outlets of the multiple air pipes respectively connected to the multiple air inlets.

[0016] In some exemplary embodiments, the plurality of air inlets are evenly distributed in the circumferential direction of the sleeve.

[0017] In some exemplary embodiments, a conveying channel is provided inside the housing;

[0018] The mechanical equipment also includes a spiral blade disposed in the conveying channel. The spiral blade is connected to the shaft. When the spiral blade rotates, it can convey the material in the conveying channel from one end of the conveying channel to the other end.

[0019] In some exemplary embodiments, the material is calcined gypsum;

[0020] The mechanical equipment also includes an air source device, which contains the dust-collecting exhaust gas filtered by the bag dust collector.

[0021] The air source device is connected to the air inlet and can deliver dust-collecting waste gas to the fan. The fan delivers the dust-collecting waste gas to the air inlet.

[0022] In some exemplary embodiments, the seal is packing.

[0023] The beneficial effects of the mechanical equipment with shaft seals described in this application are as follows:

[0024] The mechanical equipment with shaft seal provided in this application embodiment is applied to a gypsum board dry material system. It forms a secondary seal through a rotary air seal in the gypsum powder conveyor, thereby ensuring the conveyor's airtightness and on-site hygiene. The secondary seal of the gypsum powder conveyor and the excess input gas entering the machine casing accelerate the aging process of the gypsum powder, stabilizing the composition of the aged gypsum and ensuring the normal production of gypsum boards. Furthermore, the gypsum powder output from this conveyor can be cooled to approximately 100 to 110 degrees Celsius (the specific temperature depends on the season and environment). The gypsum powder then enters a cooling device, which completely cools the gypsum powder, thus benefiting the lifespan of the cooling equipment.

[0025] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0026] The accompanying drawings are used to provide a further understanding of the technical solutions of the embodiments of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0027] Figure 1 This is a schematic diagram of the structure of a mechanical device with a shaft seal according to an embodiment of this application.

[0028] Figure label:

[0029] 1-Casing, 11-First opening, 12-Conveying channel, 2-Sleeve, 21-Air inlet, 22-Annular groove, 3-Fan, 31-Air inlet, 32-Air outlet, 4-Shaft, 5-Seal, 6-Air pipe, 61-Air outlet, 7-Ball valve, 8-Air source device, 81-Dust collection exhaust gas Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other.

[0031] Appendix Figure 1 The diagram shows a structural schematic of a mechanical device with a shaft seal according to an embodiment of this application. This mechanical device with a shaft seal is applied to a gypsum board dry material system, specifically a auger conveyor for calcined gypsum powder. This auger conveyor for calcined gypsum powder can accelerate the aging process of the calcined gypsum powder. Figure 1 As shown, the mechanical device with shaft seal provided in this application embodiment includes a housing 1, a sleeve 2, a shaft 4, and a seal 5. The housing 1 has a first opening 11; one end of the sleeve 2 is connected to the first opening 11, and the sleeve 2 includes an air inlet 21 that radially penetrates the sleeve 2 for connecting an external fan 3; the shaft 4 is inserted from inside the housing 1 into the sleeve 2, and is clearance-fitted with the sleeve 2; the seal 5 is annular or cylindrical in shape, and is sleeved on the shaft 4, sandwiched between the sleeve 2 and the shaft 4, with the seal 5 located on the side of the air inlet 21 facing away from the housing 1.

[0032] In existing technology, the calcined gypsum powder produced after gypsum powder roasting is between 140 and 150 degrees Celsius. This high-temperature gypsum powder is conveyed via a auger conveyor to a sealed casing 1 for cooling and aging, achieving only a temperature reduction of about 10 degrees Celsius. The gypsum powder exiting casing 1 then enters the cooling equipment, which damages the equipment and cannot completely cool the gypsum powder. The gypsum powder auger conveyor is a mechanical device with a shaft seal, such as... Figure 1 As shown, the conveyor system specifically includes a housing 1 and a shaft 4 with a reamer. The shaft 4 with the reamer rotates within the sleeve 2 of the housing 1, thereby propelling the gypsum powder forward by the helical reamer. A gap exists between the shaft 4 and the sleeve 2, and a seal 5 is provided between the shaft 4 and the sleeve 2 to ensure an airtight connection between the shaft 4 and the housing 1. During this process, the gypsum powder distributed around the helical reamer and the housing 1 exchange heat and cool down, thus allowing the gypsum powder to age. Because the shaft 4 with the helical reamer rotates continuously within the sleeve 2 of the housing 1 for an extended period, wear occurs between the shaft 4 and the seal 5, creating gaps and gas leaks, causing material leakage from the screw conveyor and resulting in environmental pollution. Furthermore, the deterioration of the seal between the shaft 4 and the seal 5 affects the aging of the gypsum powder within the housing 1, leading to unstable gypsum composition and unstable gypsum slurry properties at the batching station, thus impacting the normal operation of the production line.

[0033] The mechanical device with shaft seal in this embodiment has an air inlet 21 that radially penetrates the sleeve 2. The air inlet 21 is used to connect an external fan 3, and the seal 5 is located on the side of the air inlet 21 facing away from the housing 1. This creates an annular air chamber between the shaft 4 on the right side of the seal 5 and the sleeve 2. The annular air chamber can provide a secondary seal to prevent material leakage. If a gap develops between the shaft 4 and the seal 5 due to long-term rotational wear, the annular air chamber can still provide a secondary seal. Because the gas resistance is low when the airflow moves inward, the annular air chamber can still provide a seal, preventing gypsum from overflowing and polluting the environment.

[0034] Furthermore, excess gas entering through the air inlet 21 of the sleeve 2 enters the interior of the casing 1, aging the gypsum powder material. The annular air chamber acts as a secondary seal, ensuring the sealing performance of the casing 1 and accelerating the aging of the gypsum powder inside the casing 1. Therefore, the mechanical equipment with shaft seal of this application can ensure the stability of the calcined gypsum composition and the normal operation of the gypsum board production line.

[0035] Furthermore, the mechanical equipment with shaft seal provided in this application embodiment can age the gypsum powder, cooling it to between 100 and 110 degrees Celsius. The specific temperature is affected by the seasonal ambient temperature. Then, the gypsum powder enters the cooling equipment, which can completely cool the gypsum board and is also beneficial to the lifespan of the cooling equipment.

[0036] In some exemplary embodiments, such as Figure 1 As shown, the mechanical equipment also includes a fan 3, an air pipe 6, and a ball valve 7; the fan 3 includes an air inlet 31 and an air outlet 32;

[0037] The air outlet 32 ​​is connected to one end of the air pipe 6, and the other end of the air pipe 6 is connected to the air inlet 21 for supplying airflow to the air inlet 21; the ball valve 7 is installed on the air pipe 6 and can adjust the airflow.

[0038] In some exemplary embodiments, such as Figure 1 As shown, the inner peripheral wall of the sleeve 2 is provided with an annular groove 22, and the air inlet 21 extends from the annular groove 22 to the outer peripheral wall of the sleeve 2.

[0039] Specifically, an annular groove 22 is provided on the inner circumferential wall of the sleeve 2 to facilitate the formation of an annular sealed airflow in the space between the sleeve 2 and the shaft 4.

[0040] In some exemplary embodiments, the blower 3 is a Roots blower.

[0041] In some exemplary embodiments, multiple air inlets 21 are provided, and multiple air outlets 61 of the air pipes 6 are provided, with the air outlets 61 of the multiple air pipes respectively connected to multiple air inlets 21.

[0042] Specifically, by setting multiple air inlets 21 and multiple air outlets 61 of the air pipe 6, it is convenient for the input airflow to form an annular sealed airflow in the space between the sleeve 2 and the shaft 4.

[0043] In some exemplary embodiments, a plurality of air inlets 21 are evenly distributed in the circumferential direction of the sleeve 2.

[0044] In some exemplary embodiments, a conveying channel 12 is provided inside the housing 1;

[0045] The mechanical equipment also includes spiral blades (attached) installed in the conveying channel 12. Figure 1 (Not shown) The spiral blades are connected to the shaft 4. When the spiral blades rotate, they can transport the material in the conveying channel 12 from one end of the conveying channel 12 to the other end.

[0046] In some exemplary embodiments, the material is calcined gypsum;

[0047] like Figure 1 As shown, the mechanical equipment also includes an air source device 8, which contains the dust collection exhaust gas 81 filtered by the bag dust collector.

[0048] The air source device 8 is connected to the air inlet 31 and can deliver dust-collecting waste gas 81 to the fan 3. The fan 3 delivers the dust-collecting waste gas 81 to the air inlet 21.

[0049] It should be noted that the material in the embodiments of this application can be calcined gypsum. Of course, the mechanical equipment of this application can also be applied to other material production lines, preferably powdered materials. The spiral blades on the shaft 4 are used to transport other materials, and the annular airflow seal can also serve as a secondary seal for other material production lines.

[0050] When the material in this embodiment is calcined gypsum, the gas source device 8 can contain the dust-collected waste gas 81 filtered by the bag filter of the gypsum board dry material production system. The dust-collected waste gas 81 filtered by the bag filter is sent into the casing 1 to carry out the aging of calcined gypsum powder and form a ring-shaped airflow for secondary sealing. This is waste gas utilization, which can reduce pollutant emissions from the gypsum board dry material production system.

[0051] In some exemplary embodiments, the seal 5 is packing.

[0052] Specifically, braided packing, also called sealing packing, is made of woven thread, with square, rectangular, or circular cross-sectional areas. It fills the sealing cavity to achieve a seal. Under microscopic conditions, the packing is extremely uneven; the shaft 4 and the packing can only partially fit together, resulting in tiny gaps between them, much like a maze. Material and gaseous media are repeatedly intercepted within this maze, thus achieving a sealing effect. However, prolonged sliding friction between the packing and the shaft 4 deteriorates the sealing performance.

[0053] In this embodiment, the sealing element 5 is a packing ring. The packing ring has the advantages of high temperature resistance, high pressure steam resistance, and serving as a heat exchange medium. The packing ring is suitable for the casing working environment where gypsum powder aging is carried out. Of course, other types of sealing elements can also be used for the sealing element 5 in this embodiment.

[0054] In some exemplary embodiments, an exhaust device (attached) is also provided on the side of the housing 1 opposite to the first opening 11. Figure 1 (Not shown in the image), the exhaust device is used to discharge the airflow into the housing 1.

[0055] Specifically, the exhaust device is used to discharge the airflow into the housing 1 to ensure the flow of the input gas inside the housing 1, so as to accelerate the aging of the gypsum powder inside the housing 1.

[0056] In the description of this application, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connection," "direct connection," "indirect connection," "fixed connection," "installation," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The terms "installation," "connection," and "fixed connection" can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0058] Although the embodiments disclosed in this application are as described above, the content described is merely for the purpose of understanding this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be defined by the appended claims.

Claims

1. A mechanical device with a shaft seal, characterized in that, The mechanical equipment used in a gypsum board dry material system includes: The casing has a first opening, through which gypsum powder is conveyed for cooling and aging. A sleeve, one end of which is connected to the first opening, includes an air inlet that radially penetrates the sleeve, the air inlet being used to connect an external fan; A shaft is inserted from the housing into the sleeve, and has a clearance fit with the sleeve; and The sealing element is constructed in the form of a ring or a cylinder. The sealing element is sleeved on the shaft and sandwiched between the sleeve and the shaft, located on the side of the air inlet facing away from the housing. The inner circumferential wall of the sleeve is provided with an annular groove, and the air inlet extends from the annular groove to the outer circumferential wall of the sleeve; the annular space between the shaft and the sleeve forms an annular air chamber, which can perform secondary sealing to ensure the sealing performance of the housing; part of the gas entering the annular air chamber from the air inlet enters the interior of the housing, and the side of the housing opposite to the first opening is also provided with an exhaust device, which is used to discharge the airflow entering the housing and accelerate the aging of the gypsum powder.

2. The mechanical equipment according to claim 1, characterized in that, The mechanical equipment also includes a fan, air pipes, and ball valves; the fan includes an air inlet and an air outlet. The air outlet is connected to one end of the air pipe, and the other end of the air pipe is connected to the air inlet, for supplying airflow to the air inlet; the ball valve is installed on the air pipe, and the ball valve can adjust the airflow rate.

3. The mechanical equipment according to claim 2, characterized in that, The blower is a Roots blower.

4. The mechanical equipment according to claim 2, characterized in that, The air inlet is provided with multiple air inlets, and the air outlet of the air pipe is provided with multiple air outlets, with the air outlets of the multiple air pipes respectively connected to the multiple air inlets.

5. The mechanical equipment according to claim 4, characterized in that, The multiple air inlets are evenly distributed in the circumferential direction of the sleeve.

6. The mechanical equipment according to any one of claims 2-5, characterized in that, The casing is equipped with a conveying channel; The mechanical equipment also includes a spiral blade disposed in the conveying channel. The spiral blade is connected to the shaft. When the spiral blade rotates, it can convey the material in the conveying channel from one end of the conveying channel to the other end.

7. The mechanical equipment according to claim 6, characterized in that, The material is calcined gypsum; The mechanical equipment also includes an air source device, which contains the dust-collecting exhaust gas filtered by the bag dust collector. The air source device is connected to the air inlet and can deliver dust-collecting waste gas to the fan. The fan delivers the dust-collecting waste gas to the air inlet.

8. The mechanical equipment according to claim 6, characterized in that, The sealing element is packing.

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