Rotary sealing structure for shaft body of reaction kettle

Abstract

The utility model discloses a rotary sealing structure for a shaft body of a reaction kettle, which comprises an upper end cover of the reaction kettle, an upper sealing sleeve and a lower sealing sleeve, the upper sealing sleeve and the lower sealing sleeve are arranged at the central position of the top end and the central position of the top wall of the upper end cover of the reaction kettle, and a flange anti-seepage structure for keeping sealing connection is arranged among the upper end cover of the reaction kettle, the lower sealing sleeve and the upper sealing sleeve. A lower annular inner edge and an upper annular inner edge are fixed to one end of the interior of the lower sealing sleeve, a roller bearing is installed in the portion, between the lower annular inner edge and the upper annular inner edge, of the interior of the lower sealing sleeve, and a main shaft single body is installed in an inner ring of the roller bearing in a penetrating mode. By providing quadruple sealing guarantee, even if one layer of sealing fails, the other layer of sealing can still play a role, the risk of medium leakage is effectively prevented, meanwhile, the sealing layers are mutually independent and do not influence each other, and a good sealing effect can be kept even in a high-temperature and high-pressure working environment.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft body sealing, in particular to a reaction kettle shaft body rotary sealing structure. Background Art

[0002] The rotary sealing structure of the reactor shaft body achieves leakage prevention, shaft body protection, and smooth rotation through the reasonable design of the sealing ring principle and the sealing seat structure, wherein the sealing ring contacts the shaft body to form a seal, and at the same time contacts the fixed part to prevent medium leakage; the sealing seat supports the sealing ring and fixes its position to ensure a stable sealing effect; as disclosed in the authorization announcement No. CN113522190A, a sealing structure of a reactor stirring shaft comprises a reactor body, a rotating shaft and a rotating support part, the surface of the rotating shaft is sleeved with an anti-corrosion protection mechanism, the anti-corrosion protection mechanism comprises an anti-corrosion support collar and an anti-corrosion flange cover, anti-expansion protection mechanisms are arranged on both sides of the anti-corrosion support collar, the anti-expansion protection mechanism comprises an anti-expansion top glue and an anti-expansion air The anti-expansion gap is located on the inner side of the anti-corrosion support ring, and an oil seal installation slide is opened on the inner side of the shaft connection end. By arranging the anti-expansion protection mechanism and the oil pressure support part, and utilizing the abutment between the anti-expansion protection mechanism and the rotating shaft, when the shaft seal component expands due to heat, the anti-expansion top glue and the anti-expansion gap can be pressed to eliminate the influence of expansion. However, the sealing ring between the anti-corrosion flange cover and the valve body in this technical solution forms a sealing and anti-seepage function. However, for the reactor under high temperature and high pressure working conditions, the material will be affected by greater pressure. At this time, the material inside the reactor is still transmitted upward one level at a time, especially under the stirring action of the stirring shaft and the shaft body. At this time, the material in the reactor is easy to penetrate to the outside of the sealing structure through the tiny gap of the sealing ring. Utility Model Content

[0003] The purpose of the utility model is to provide a rotary sealing structure for the shaft of a reactor, wherein a flange anti-seepage structure is adopted between the lower sealing sleeve, the upper sealing sleeve and the upper end cover of the reactor, the flange anti-seepage structure serves as the outermost sealing layer, and the main shaft unit and the lower sealing sleeve adopt a ring sleeve rotary structure, and the upper sealing sleeve is pressed into the stepped groove of the main shaft unit, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reactor shaft rotating sealing structure, comprising an upper end cover of the reactor and an upper sealing sleeve and a lower sealing sleeve installed at the center position of the top end cover and the center position of the top wall of the reactor, a flange anti-seepage structure for maintaining a sealed connection is installed between the upper end cover, the lower sealing sleeve and the upper sealing sleeve, a lower annular inner edge and an upper annular inner edge are fixed at one end inside the lower sealing sleeve, a roller bearing is installed inside the lower sealing sleeve between the lower annular inner edge and the upper annular inner edge, a main shaft monomer is installed through the inner ring of the roller bearing, a ring sleeve rotating structure is arranged between the bottom end of the main shaft monomer and the top end of the upper annular inner edge, a pressing sleeve is integrally formed at one end of the surface of the main shaft monomer, the top end of the pressing sleeve and the top wall of the upper sealing sleeve are embedded with each other, an inner sealing steel ring with the same outer diameter as the pressing sleeve is fixed inside the lower sealing sleeve, and an inner sealing ring is inlaid at the bottom end of the inner sealing steel ring.

[0005] Preferably, the flange anti-seepage structure includes an upper flange and a lower flange integrally formed on the outer edges of the lower sealing sleeve and the upper sealing sleeve, and the upper flange and the lower flange are respectively in contact with the top plane and the top wall plane of the upper end cover of the reactor, and the top end of the upper flange is installed with a bolt member that passes through the upper flange, the upper end cover of the reactor, and the lower flange.

[0006] Preferably, a second sealing ring and a first sealing ring are respectively inlaid at the inner edge and the outer edge of the upper flange and the lower flange.

[0007] Preferably, a stepped groove is provided at the top of the compression sleeve, and an annular inner groove matching the stepped groove is provided on the inner wall of the upper sealing sleeve.

[0008] Preferably, the annular sleeve rotating structure includes two circles of annular sinking grooves starting from the top of the upper annular inner edge, and two circles of annular convex edges integrally formed at the bottom end of the pressing sleeve, and the annular convex edges and the annular sinking grooves are plugged and matched.

[0009] Preferably, six bolt members are provided, and the six bolt members are symmetrically structured about the central axis of the main shaft unit.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the reactor shaft rotating sealing structure is provided with a main shaft monomer and an upper annular inner edge and other structures that cooperate with each other, the ring sleeve rotating structure is used as the innermost seal, and the inner sealing steel ring and the inner sealing ring are used as secondary seals, the annular inner groove and the step groove are used as tertiary seals, and the flange anti-seepage structure is used as the outer seal. By providing four layers of sealing protection, even if one layer of sealing has a problem, the other layer of sealing can still play a role, effectively preventing the risk of medium leakage. At the same time, the sealing layers are independent of each other and will not affect each other. Even in a high temperature and high pressure working environment, a good sealing effect can be maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0012] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0013] Figure 3 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0014] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the utility model after the main shaft unit is removed;

[0015] Figure 5 It is a three-dimensional structural schematic diagram of the main shaft monomer of the utility model;

[0016] In the figure: 1. upper end cover of the reactor; 2. lower sealing sleeve; 201. inner sealing steel ring; 202. inner sealing ring; 3. upper sealing sleeve; 301. annular inner groove; 4. flange anti-seepage structure; 401. upper flange plate; 402. lower flange plate; 403. first sealing ring; 404. second sealing ring; 405. bolt member; 5. lower annular inner edge; 6. upper annular inner edge; 7. roller bearing; 8. main shaft unit; 801. pressing sleeve; 802. stepped groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-5 The utility model provides an embodiment: a reactor shaft rotating sealing structure, comprising an upper end cover 1 of the reactor and an upper sealing sleeve 3 and a lower sealing sleeve 2 installed at the center position of the top end cover 1 and the center position of the top wall of the reactor, a flange anti-seepage structure 4 for maintaining a sealed connection is installed between the upper end cover 1 of the reactor, the lower sealing sleeve 2 and the upper sealing sleeve 3, a lower annular inner edge 5 and an upper annular inner edge 6 are fixed to one end of the lower sealing sleeve 2, a roller bearing 7 is installed inside the lower sealing sleeve 2 between the lower annular inner edge 5 and the upper annular inner edge 6, a main shaft monomer 8 is installed through the inner ring of the roller bearing 7, during the rotation of the main shaft monomer 8, the roller bearing 7 between the lower annular inner edge 5 and the upper annular inner edge 6 ensures that the main shaft monomer 8 can rotate normally, and a ring sleeve rotating structure is arranged between the bottom end of the main shaft monomer 8 and the top end of the upper annular inner edge 6;

[0019] A pressing sleeve 801 is integrally formed at one end of the surface of the main shaft monomer 8, the top of the pressing sleeve 801 and the top wall of the upper sealing sleeve 3 are interlocked, the top of the pressing sleeve 801 is provided with a stepped groove 802, and the inner wall of the upper sealing sleeve 3 is provided with an annular inner groove 301 that matches the stepped groove 802;

[0020] An inner sealing steel ring 201 having the same outer diameter as the compression sleeve 801 is fixed inside the lower sealing sleeve 2, and an inner sealing ring 202 is inlaid at the bottom end of the inner sealing steel ring 201. The inner sealing steel ring 201 and the inner sealing ring 202 are on the outside of the main shaft monomer 8. The sealing layer composed of the inner sealing steel ring 201 and the inner sealing ring 202 can bear the pressure more evenly, thereby reducing the risk of leakage caused by excessive local pressure;

[0021] The flange anti-seepage structure 4 includes an upper flange 401 and a lower flange 402 integrally formed on the outer edges of the lower sealing sleeve 2 and the upper sealing sleeve 3. The upper flange 401 and the lower flange 402 are in contact with the top plane and the top wall plane of the upper end cover 1 of the reactor, respectively. The top of the upper flange 401 is provided with a bolt member 405 that penetrates the upper flange 401, the upper end cover 1 of the reactor, and the lower flange 402. There are six bolt members 405, and the six bolt members 405 are symmetrically structured about the central axis of the main shaft monomer 8;

[0022] The inner edge and outer edge of the upper flange 401 and the lower flange 402 are respectively inlaid with a second sealing ring 404 and a first sealing ring 403. The first sealing ring 403 is installed between the upper flange 401, the lower flange 402 and the top plane and the top wall plane of the upper end cover 1 of the reactor. The first sealing ring 403 and the second sealing ring 404 form at least two sealing layers at the connection between the lower sealing sleeve 2 and the upper end cover 1 of the reactor, thereby achieving a multiple sealing effect, which can also effectively prevent the intrusion of external media.

[0023] The annular sleeve rotating structure includes two circles of annular sunken grooves starting at the top of the upper annular inner edge 6, and two circles of annular convex edges integrally formed at the bottom end of the pressing sleeve 801. The annular convex edges and the annular sunken grooves are plugged and matched. When the main shaft unit 8 is assembled into the interior of the lower sealing sleeve 2, the annular protrusion at the bottom end of the pressing sleeve 801 and the annular sunken groove at the top of the upper annular inner edge 6 are plugged into each other. When the main shaft unit 8 is driven to rotate by an external motor, the main shaft unit 8 and the upper annular inner edge 6 can still maintain a relative rotation relationship through the annular sunken grooves and annular protrusions.

[0024] When the embodiment of the present application is in use, the staff first takes out the lower sealing sleeve 2 to be connected with the upper end cover 1 of the reactor, so that the lower sealing sleeve 2 is installed at the center position of the top wall of the upper end cover 1 of the reactor, and then uses the flange anti-seepage structure 4 to seal the upper end cover 1 and the lower sealing sleeve 2 of the reactor. At this time, the flange anti-seepage structure 4 serves as the outermost sealing member of the sealing structure, and then takes out the main shaft monomer 8, so that the bottom end of the main shaft monomer 8 passes through the outside of the roller bearing 7, and the ring sleeve rotating structure is used between the bottom end of the pressing sleeve 801 and the top end of the upper annular inner edge 6 to maintain a relatively sealed state, and the inner sealing steel ring 201 and the inner sealing ring 202 are used to block the material seeping out of the ring sleeve rotating structure to prevent the material from continuing to approach the connection between the upper end cover 1, the lower sealing sleeve 2 and the upper sealing sleeve 3 of the reactor, and finally takes out the upper sealing sleeve 3. , so that the upper sealing sleeve 3 is concentrically installed on the top of the main shaft monomer 8, and the annular inner groove 301 and the stepped groove 802 are in contact with each other, and the flange anti-seepage structure 4 is used to fix the upper end cover 1, the lower sealing sleeve 2, and the upper sealing sleeve 3 of the reactor again. At this time, the ring sleeve rotating structure between the upper annular inner edge 6 and the main shaft monomer 8 serves as the innermost sealing member, and the inner sealing steel ring 201 and the inner sealing ring 202 serve as the secondary sealing members, the annular inner groove 301 and the stepped groove 802 serve as the tertiary sealing members, and the flange anti-seepage structure 4 serves as the outer sealing member. By providing four layers of sealing protection, even if one layer of sealing has problems, the other layer of sealing can still play a role, effectively preventing the risk of medium leakage. At the same time, the sealing layers are independent of each other and will not affect each other. Even in a high temperature and high pressure working environment, a good sealing effect can be maintained.

Claims

1. A reaction kettle shaft rotating sealing structure, characterized in that: The invention comprises an upper end cover (1) of a reactor, and an upper sealing sleeve (3) and a lower sealing sleeve (2) installed at the center position of the top end and the center position of the top wall of the upper end cover (1) of the reactor, a flange anti-seepage structure (4) for maintaining a sealed connection is installed between the upper end cover (1), the lower sealing sleeve (2) and the upper sealing sleeve (3), a lower annular inner edge (5) and an upper annular inner edge (6) are fixed to one end of the interior of the lower sealing sleeve (2), a roller bearing (7) is installed inside the lower sealing sleeve (2) between the lower annular inner edge (5) and the upper annular inner edge (6), and the A main shaft unit (8) is installed through the inner ring of the roller bearing (7), and a ring sleeve rotating structure is arranged between the bottom end of the main shaft unit (8) and the top end of the upper annular inner edge (6). A pressing sleeve (801) is integrally formed on one end of the surface of the main shaft unit (8), and the top end of the pressing sleeve (801) and the top wall of the upper sealing sleeve (3) are mutually embedded. An inner sealing steel ring (201) with the same outer diameter as the pressing sleeve (801) is fixed inside the lower sealing sleeve (2), and an inner sealing ring (202) is embedded at the bottom end of the inner sealing steel ring (201).

2. A reaction kettle shaft rotating sealing structure according to claim 1, characterized in that: The flange anti-seepage structure (4) comprises an upper flange (401) and a lower flange (402) integrally formed on the outer edges of the lower sealing sleeve (2) and the upper sealing sleeve (3); the upper flange (401) and the lower flange (402) are in contact with the top plane and the top wall plane of the upper end cover (1) of the reactor, respectively; and a bolt member (405) penetrating the upper flange (401), the upper end cover (1) of the reactor and the lower flange (402) is installed at the top end of the upper flange (401).

3. A reaction kettle shaft rotating sealing structure according to claim 2, characterized in that: The inner edge and outer edge of the upper flange (401) and the lower flange (402) are respectively inlaid with a second sealing ring (404) and a first sealing ring (403).

4. The reaction kettle shaft rotating sealing structure according to claim 1, characterized in that: The top end of the compression sleeve (801) is provided with a stepped groove (802), and the inner wall of the upper sealing sleeve (3) is provided with an annular inner groove (301) that matches the stepped groove (802).

5. The reaction kettle shaft rotating sealing structure according to claim 1, characterized in that: The annular sleeve rotating structure comprises two circles of annular sinking grooves starting from the top of the upper annular inner edge (6), and two circles of annular convex edges integrally formed at the bottom of the pressing sleeve (801), and the annular convex edges and the annular sinking grooves are plugged and matched.

6. The reaction kettle shaft rotating sealing structure according to claim 2, characterized in that: The six bolt members (405) are provided, and the six bolt members (405) are symmetrically structured with respect to the central axis of the main shaft unit (8).

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