A sealing device for hazardous gases in a vacuum drying state

Abstract

The present invention relates to a sealing device for hazardous gases in a vacuum drying state, and relates to the technical field of seals. The sealing device includes a reduction drive assembly, a shaft drive assembly, and a sealing assembly; the reduction drive assembly is connected to the sealing port of the equipment housing; one end of the shaft drive assembly is connected to the air pressure chamber of the reduction drive assembly, and the other end of the shaft drive assembly penetrates through the reduction drive assembly and the sealing port and is arranged inside the equipment housing; the sealing assembly is connected to the shaft drive assembly, and the sealing assembly is arranged at the sealing port. This sealing device solves the problems that the seal structure of the sealing equipment is complex in design, expensive in price, unable to ensure tight sealing, and there is a potential safety hazard of leakage. The present invention uses the reduction drive assembly to lock the position of the shaft drive assembly at the sealing port, and seals the connection position of the shaft drive assembly through the sealing assembly to ensure that there is no leakage at the sealing port, with a simple structure design and low price.

Description

Technical Field

[0001] The present invention relates to the technical field of seals, and particularly to a sealing device for dangerous gases in a vacuum drying state. Background Art

[0002] In the fields of chemical industry, pharmaceuticals, food processing, etc., when storing flammable, explosive, toxic gases and other dangerous gases, sealing equipment is required, and the sealing port of the sealing equipment needs to be strictly sealed to prevent leakage of the sealing equipment.

[0003] A seal is connected to the sealing port of the sealing equipment. To ensure that the sealing equipment does not leak, the structural design of the seal is usually complex and the price is very expensive.

[0004] However, even so, it cannot completely guarantee that the dangerous gases in the sealing equipment will not leak. Once the sealing equipment leaks, serious consequences will occur. Summary of the Invention

[0005] The present invention aims to provide a sealing device for dangerous gases in a vacuum drying state to solve the technical problems existing in the prior art, such as the complex structural design and high price of the seals of the sealing equipment, the inability to ensure tight sealing, and the potential safety hazard of leakage.

[0006] The object of the present invention is to solve the deficiencies of the prior art and provide a sealing device for dangerous gases in a vacuum drying state, which includes a speed reduction drive assembly, a shaft transmission assembly, and a sealing assembly;

[0007] The speed reduction drive assembly is connected to the sealing port of the equipment housing;

[0008] One end of the shaft transmission assembly is connected to the air pressure chamber of the speed reduction drive assembly, and the other end of the shaft transmission assembly penetrates through the speed reduction drive assembly and the sealing port and is arranged inside the equipment housing; the speed reduction drive assembly can directly drive the shaft transmission assembly to form a squeezing force on the sealing port, so as to ensure tight sealing of the sealing port.

[0009] The sealing assembly is arranged on the inner wall of the sealing port, and the sealing assembly is sleeved on the outer peripheral wall of the part of the shaft transmission assembly inserted into the sealing port;

[0010] A gas is arranged in the air pressure chamber, and the pressure of the gas in the air pressure chamber is always higher than the pressure of the dangerous gases inside the sealing equipment to ensure that the dangerous gases inside the sealing equipment do not leak.

[0011] Further, the speed reduction drive assembly includes a base, a speed reducer seat, and a reduction motor;

[0012] The base is connected to the sealing port, and the speed reducer seat forms an air pressure chamber for accommodating one end of the shaft transmission assembly;

[0013] One end of the speed reducer seat is connected to the base, and the other end of the speed reducer seat is connected to the speed reduction motor. The speed reduction motor is connected to one end of the shaft transmission assembly in the air pressure chamber.

[0014] Furthermore, a boss is formed at the left end of the base, and the boss is inserted and snap-fitted at the sealing port; a central hole extending axially is provided at the center of the boss; the inside of the speed reducer seat forms an air pressure chamber with a hollow structure, and the right end of the shaft transmission assembly can be accommodated in the air pressure chamber to fix the position of the right end of the shaft transmission assembly; the left end of the speed reducer seat is fixedly welded to the right end of the base, the right end of the speed reducer seat is bolted to the speed reduction motor, and the inner end of the speed reduction motor is screwed to the right end of the shaft transmission assembly.

[0015] Furthermore, a nitrogen intake hole communicating with the air pressure chamber is provided on the side surface of the speed reducer seat, and the nitrogen intake hole is used to connect to a nitrogen gas source.

[0016] Furthermore, the shaft transmission assembly includes a transmission shaft and a oil seal part;

[0017] One end of the transmission shaft is connected to the speed reduction motor;

[0018] The oil seal part is sleeved on the transmission shaft and abuts against the inner end face of the base;

[0019] The other end of the transmission shaft penetrates through the base and the sealing port and is arranged inside the equipment housing.

[0020] Furthermore, the oil seal part includes a bearing oil seal seat, a bearing and a skeleton oil seal;

[0021] The bearing oil seal seat is sleeved on the transmission shaft;

[0022] The bearing is connected to one end of the bearing oil seal seat, and the skeleton oil seal is connected to the other end of the bearing oil seal seat. The spring force of the skeleton oil seal and the pressure difference between the inside of the equipment and the nitrogen gas in the air pressure chamber are used to prevent the nitrogen gas from leaking into the equipment.

[0023] Furthermore, a retaining ring is connected to the end face of the skeleton oil seal abutting against the base, and the retaining ring abuts and is fixed on the right end face of the base to fix the installation position of the skeleton oil seal.

[0024] Furthermore, a first sealing ring is connected between the bearing oil seal seat and the base, and an annular groove is formed on the left end face of the bearing oil seal seat, and the first sealing ring is arranged in the annular groove.

[0025] Furthermore, a sealing groove is provided on the inner ring surface of the base, and the sealing assembly includes a second sealing ring;

[0026] The second sealing ring is arranged in the sealing groove to achieve the sealing of the transmission shaft at the base and the sealing port.

[0027] Furthermore, the number of the sealing grooves is multiple, and the number of the second sealing rings is multiple corresponding to the number of the sealing grooves;

[0028] Each second sealing ring is arranged in each sealing groove. Advantages

[0029] Compared with the prior art, the advantages of the present invention are as follows: the sealing device for dangerous gases in a vacuum drying state according to the present invention blocks the sealing port by connecting the speed reduction drive assembly to the sealing port of the equipment housing; one end of the shaft transmission assembly is connected to the air pressure chamber of the speed reduction drive assembly to lock the connection position of one end of the shaft transmission assembly; the other end of the shaft transmission assembly passes through the speed reduction drive assembly and the sealing port and is arranged inside the equipment to lock the connection position of the other end of the shaft transmission assembly; during use, the air pressure in the air pressure chamber is greater than the air pressure inside the equipment to ensure that the dangerous gases inside the equipment will not leak; the sealing assembly is connected to the shaft transmission assembly, and the sealing assembly is arranged at the position of the sealing port so as to seal and fix the connection position of the shaft transmission assembly at the sealing port by using the sealing assembly; the structure design of the present invention is simple, the price is low, the sealing is tight, and there is no danger of leakage. Description of the Drawings

[0030] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. Together with the specific embodiments of the present application, they are used to explain the technical solutions of the present invention and do not constitute a limitation to the technical solutions of the present invention.

[0031] Figure 1 It is a schematic structural diagram of the sealing device for dangerous gases in a vacuum drying state according to the present invention during use.

[0032] Figure 2 It is a schematic structural diagram of the sealing device for dangerous gases in a vacuum drying state according to the present invention.

[0033] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0034] Figure 4 It is a schematic structural diagram of the speed reduction drive assembly according to the present invention.

[0035] Figure 5 It is a schematic structural diagram of the shaft transmission assembly according to the present invention.

[0036] Reference Signs:

[0037] 100 - speed reduction drive assembly; 200 - shaft transmission assembly;

[0038] 300 - sealing assembly; 400 - equipment housing;

[0039] 101 - air pressure chamber; 102 - base

[0040] 103 - reducer seat; 104 - reduction motor

[0041] 105 - nitrogen inlet hole; 106 - sealing groove

[0042] 201 - transmission shaft; 202 - oil seal part

[0043] 203 - bearing oil seal seat; 204 - bearing

[0044] 205 - skeleton oil seal; 206 - retaining ring

[0045] 207 - first sealing ring; 301 - second sealing ring

[0046] 401 - sealing port Detailed implementation manners

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] Such as Figures 1 to 5As shown in the figure, the sealing device for dangerous gases in a vacuum drying state according to the present invention includes a speed reduction drive assembly 100, a shaft transmission assembly 200, and a sealing assembly 300;

[0051] The speed reduction drive assembly 100 is connected to the sealing port 401 of the equipment housing 400;

[0052] One end of the shaft transmission assembly 200 is connected to the air pressure chamber 101 of the speed reduction drive assembly 100, and the other end of the shaft transmission assembly 200 penetrates through the speed reduction drive assembly 100 and the sealing port 401 and is arranged inside the equipment housing 400;

[0053] The sealing assembly 300 is arranged on the inner wall of the sealing port 401, and the sealing assembly 300 is sleeved on the outer peripheral wall of the part of the shaft transmission assembly 200 inserted into the sealing port 401.

[0054] In an embodiment of the present invention, as Figure 1 、 Figure 2 shown, a sealing port 401 is formed at the right end of the equipment housing 400, and the sealing port 401 is a circular through hole; the right end of the shaft transmission assembly 200 is arranged inside the speed reduction drive assembly 100, and the right end of the shaft transmission assembly 200 is arranged inside the air pressure chamber 101 of the speed reduction drive assembly 100; the left end of the shaft transmission assembly 200 is arranged inside the equipment housing 400, and the left end of the shaft transmission assembly 200 penetrates through the through hole on the left end face of the speed reduction drive assembly 100 and the sealing port 401 and is accommodated inside the equipment housing 400; during the operation of the equipment, the nitrogen pressure inside the air pressure chamber 101 is always higher than the pressure of the dangerous gases inside the equipment to ensure that the dangerous gases inside the sealed equipment will not leak; the sealing assembly 300 is sleeved on the shaft transmission assembly 200, and the sealing assembly 300 is arranged at the sealing port 401 to further ensure the tightness of the seal at the sealing port 401, so that the dangerous gases inside the sealed equipment will not leak.

[0055] The structural design of the present invention is simple, convenient to use, and low in cost. When in use, it can ensure that the dangerous gases of the sealed equipment will not leak, and it is safe and reliable.

[0056] Furthermore, the speed reduction drive assembly 100 includes a base 102, a speed reducer seat 103, and a reduction motor 104;

[0057] The base 102 is connected to the sealing port 401, and an air pressure chamber 101 for accommodating one end of the shaft transmission assembly 200 is formed inside the speed reducer seat 103;

[0058] One end of the speed reducer seat 103 is connected to the base 102, the other end of the speed reducer seat 103 is connected to the reduction motor 104, and the reduction motor 104 is connected to one end of the shaft transmission assembly 200 inside the air pressure chamber 101.

[0059] In one embodiment of the present invention, as Figure 2 , Figure 4 shown, a boss 1021 is formed at the left end of the base 102, and the boss is snap-fitted and fixed at the sealing port 401; a hollow air pressure chamber 101 is formed inside the speed reducer seat 103, and the right end of the shaft transmission assembly 200 can be accommodated in the air pressure chamber 101 to fix the position of the right end of the shaft transmission assembly 200; the left end of the speed reducer seat 103 is welded and fixed to the right end of the base 102, and the right end of the speed reducer seat 103 is bolt-connected to the reduction motor 104, and the inner end of the reduction motor 104 is screw-connected to the right end of the shaft transmission assembly 200.

[0060] When the reduction motor 104 is started, it can directly drive the shaft transmission assembly 200 to form a squeezing force on the sealing port 401, so as to ensure the tight sealing of the sealing port 401.

[0061] Furthermore, a nitrogen inlet hole 105 communicating with the air pressure chamber 101 is provided on the side surface of the speed reducer seat 103, and the nitrogen inlet hole 105 is used to connect to a nitrogen gas source.

[0062] In one embodiment of the present invention, as Figure 2 , Figure 4 shown, a nitrogen inlet hole 105 is formed on the outer peripheral surface of the speed reducer seat 103, the nitrogen inlet hole 105 communicates with the air pressure chamber 101, and an external nitrogen gas source is connected to the nitrogen inlet hole 105, so that external nitrogen can directly enter the inside of the air pressure chamber 101 through the nitrogen inlet hole 105, and a certain nitrogen gas pressure is formed in the air pressure chamber 101; external nitrogen is continuously introduced into the air pressure chamber 101 to ensure that the nitrogen gas pressure in the air pressure chamber 101 is greater than the pressure of the dangerous gas inside the equipment, so as to ensure that the sealing port 401 is more tightly sealed and no leakage will occur.

[0063] Furthermore, the shaft transmission assembly 200 includes a transmission shaft 201 and a seal part 202;

[0064] One end of the transmission shaft 201 is connected to the reduction motor 104;

[0065] The seal part 202 is sleeved on the transmission shaft 201 and abuts against the inner end surface of the base 102;

[0066] The other end of the transmission shaft 201 passes through the base 102 and the sealing port 401 and is arranged inside the equipment.

[0067] In one embodiment of the present invention, as Figure 2 , Figure 5As shown, the right end of the drive shaft 201 is connected to the reduction motor 104 by screws to fix the position of the right end of the drive shaft 201 using the reduction motor 104; the oil seal part 202 is sleeved on the drive shaft 201, and the right end of the oil seal part 202 abuts against the flange at the right end of the drive shaft 201, and the left end of the oil seal part 202 abuts against the inner end face of the base 102 to lock the installation position of the oil seal part 202; the left end of the drive shaft 201 passes through the central hole and the sealing port 401 of the base 102 and is then arranged inside the device, using the spring force of the oil seal part 202 and the pressure difference between the inside of the device and the nitrogen chamber in the pneumatic chamber 101 to prevent nitrogen from leaking into the device interior.

[0068] Furthermore, the oil seal part 202 includes a bearing oil seal seat 203, a bearing 204, and a skeleton oil seal 205;

[0069] The bearing oil seal seat 203 is sleeved on the drive shaft 201;

[0070] The bearing 204 is connected to one end of the bearing oil seal seat 203, and the skeleton oil seal 205 is connected to the other end of the bearing oil seal seat 203.

[0071] In one embodiment of the present invention, as Figure 2 、 Figure 5 shown, the bearing 204 is connected to the right end of the bearing oil seal seat 203, and the skeleton oil seal 205 is connected to the left end of the bearing oil seal seat 203 to seal and fix both ends of the bearing oil seal seat 203; in order to prevent the nitrogen inside the pneumatic chamber 101 from leaking into the device interior, a skeleton oil seal 205 is installed inside the bearing oil seal seat 203, using the spring force of the skeleton oil seal 205 and the pressure difference between the inside of the device and the nitrogen in the pneumatic chamber 101 to prevent nitrogen from leaking into the device interior, thereby achieving the purpose of sealing.

[0072] Furthermore, a retaining ring 206 is connected to the end face of the skeleton oil seal 205 that abuts against the base 102.

[0073] In one embodiment of the present invention, as Figure 2 、 Figure 5 shown, a retaining ring 206 is connected to the left end of the skeleton oil seal 205. The retaining ring 206 is a metal ring and then abuts and fixes against the right end face of the base 102 to fix the installation position of the skeleton oil seal 205.

[0074] Furthermore, a first sealing ring 207 is connected between the bearing oil seal seat 203 and the base 102.

[0075] In one embodiment of the present invention, as Figure 2 、 Figure 5As shown, the first sealing ring 207 is an O-ring made of rubber. An annular groove is formed on the left end face of the bearing oil seal seat 203, and the O-ring is connected in the annular groove, so that the O-ring is arranged between the bearing oil seal seat 203 and the base 102, thereby ensuring the firm connection position between the bearing oil seal seat 203 and the base 102.

[0076] Furthermore, a sealing groove 106 is provided on the inner ring surface of the base 102, and the sealing assembly 300 includes a second sealing ring 301;

[0077] The second sealing ring 301 is arranged in the sealing groove 106 to achieve the sealing of the transmission shaft 201 at the base 102 and the sealing port 401.

[0078] In an embodiment of the present invention, as Figure 2 、 Figure 3 shown, an annular sealing groove 106 is formed on the inner ring surface of the central hole of the base 102; the second sealing ring 301 is an O-ring made of rubber, and the O-ring is snap-fitted and fixed in the sealing groove 106 to ensure the firmness of the connection position of the transmission shaft 201 at the base 102 and the sealing port 401, and the transmission shaft 201 will not be disengaged from the base 102 and the sealing port 401.

[0079] Furthermore, the number of the sealing grooves 106 is multiple, and the number of the second sealing rings 301 is multiple corresponding to the number of the sealing grooves 106;

[0080] Each second sealing ring 301 is arranged in each sealing groove 106.

[0081] In an embodiment of the present invention, as Figure 2 、 Figure 3 shown, two annular sealing grooves 106 are formed on the inner ring surface of the central hole of the base 102, and each sealing groove 106 is snap-fitted and fixed with an O-ring. The installation position of the transmission shaft 201 is locked in the left and right directions of the transmission shaft 201 by using the two O-rings.

[0082] In other specific embodiments, the number of the sealing grooves 106 and the number of the O-rings can also be set to other corresponding numbers.

[0083] In other specific embodiments, the cross-section of the sealing groove 106 is set to a triangle with a narrow inner part and a wide outer part, and the cross-section of the O-ring is set to a triangle with a wide inner part and a narrow outer part.

[0084] In specific embodiments, the materials of the O-ring and the skeleton oil seal 205 can be selected accordingly according to the characteristics of different harmful gases inside the equipment.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A sealing device for dangerous gases in a vacuum drying state, characterized in that, The sealing device includes a speed reduction drive assembly, a shaft transmission assembly, and a sealing assembly; The speed reduction drive assembly is connected to the sealing port of the equipment housing; One end of the shaft transmission assembly is connected to the air pressure chamber of the speed reduction drive assembly, and the other end of the shaft transmission assembly penetrates the speed reduction drive assembly and the sealing port and is arranged inside the equipment housing; the speed reduction drive assembly can directly drive the shaft transmission assembly to form a squeezing force on the sealing port, so as to ensure the tight sealing of the sealing port; The sealing assembly is arranged on the inner wall of the sealing port, and the sealing assembly is sleeved on the outer peripheral wall of the part of the shaft transmission assembly inserted into the sealing port; Gas is arranged in the air pressure chamber, and the pressure of the gas in the air pressure chamber is always higher than the pressure of the dangerous gas inside the sealed equipment, so as to ensure that the dangerous gas inside the sealed equipment will not leak; The speed reduction drive assembly includes a base, a reducer seat, and a reduction motor; The base is connected to the sealing port, and an air pressure chamber for accommodating one end of the shaft transmission assembly is formed inside the reducer seat; One end of the reducer seat is connected to the base, the other end of the reducer seat is connected to the reduction motor, and the reduction motor is connected to one end of the shaft transmission assembly in the air pressure chamber; A boss is formed at the left end of the base, and the boss is inserted into and clamped and fixed at the sealing port; a central hole extending axially is arranged at the center of the boss; the inside of the reducer seat forms a hollow-structured air pressure chamber, and the right end of the shaft transmission assembly can be accommodated in the air pressure chamber to fix the position of the right end of the shaft transmission assembly; the left end of the reducer seat is welded and fixed to the right end of the base, the right end of the reducer seat is connected to the reduction motor by bolts, and the inner end of the reduction motor is connected to the right end of the shaft transmission assembly by screws; A nitrogen inlet hole communicated with the air pressure chamber is arranged on the side of the reducer seat, and the nitrogen inlet hole is used to connect a nitrogen gas source.

2. The sealing device for hazardous gases in a vacuum drying state according to claim 1, characterized in that, The shaft transmission assembly includes a transmission shaft and a oil seal part; One end of the transmission shaft is connected to the reduction motor; The oil seal part is sleeved on the transmission shaft and abuts against the inner end face of the base; The other end of the transmission shaft penetrates the base and the sealing port and is arranged inside the equipment housing.

3. The sealing device for dangerous gases in a vacuum drying state according to claim 2, characterized in that, The oil seal part includes a bearing oil seal seat, a bearing, and a skeleton oil seal; The bearing oil seal seat is sleeved on the transmission shaft; The bearing is connected to one end of the bearing oil seal seat, and the skeleton oil seal is connected to the other end of the bearing oil seal seat. The spring force of the skeleton oil seal and the pressure difference between the inside of the equipment and the nitrogen in the air pressure chamber are used to prevent the nitrogen from leaking into the equipment.

4. The sealing device for hazardous gases in a vacuum drying state according to claim 3, characterized in that, A retaining ring is connected to the end face of the skeleton oil seal that abuts against the base, and the retaining ring abuts against and is fixed to the right end face of the base to fix the installation position of the skeleton oil seal.

5. The sealing device for hazardous gases in a vacuum drying state according to claim 4, characterized in that, A first sealing ring is connected between the bearing oil seal seat and the base, and an annular groove is formed on the left end face of the bearing oil seal seat, and the first sealing ring is arranged in the annular groove.

6. The sealing device for hazardous gases in a vacuum drying state according to claim 1, characterized in that, A sealing groove is arranged on the inner ring surface of the base, and the sealing assembly includes a second sealing ring; The second sealing ring is arranged in the sealing groove to realize the sealing of the transmission shaft at the base and the sealing port.

7. The sealing device for dangerous gases in a vacuum drying state according to claim 6, characterized in that, The number of the sealing grooves is multiple, and the number of the second sealing rings is multiple corresponding to the number of the sealing grooves; each second sealing ring is arranged in each sealing groove.

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