A sealing device for preventing pollution of stirring shaft of reactor

Abstract

The present invention relates to a sealing device for preventing pollution of a stirring shaft of a reactor, comprising a reactor cover end and a stirring shaft; a sleeve is sleeved between the reactor cover end and the stirring shaft, the outer bottom of the sleeve is welded to the inner side of the reactor cover end, the sleeve is fixed to the bottom of the end cover, and a static ring is embedded and installed on the inner side of the end cover. The sealing device for preventing pollution of a stirring shaft of a reactor prevents oil stains from directly entering the reactor tank body and causing a decrease in the quality of drug production through the cooperation of the sleeve, the dynamic ring, the static ring, and the O-ring, and increases the sealing effect with the stirring shaft. The oil stains are discharged to the outside of the reactor through the stepped hole, and the screw is rotated to drive the pressure cover to press down the spring seat, so that the degree of compression of the spring on the dynamic ring can be adjusted, and a blocking mechanism is provided to block and seal the stepped hole, thereby achieving double blocking, increasing the sealing performance, and preventing debris or oil stains from directly entering and blocking the stepped hole.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceutical reactors, in particular to a sealing device for preventing pollution of a stirring shaft of a reactor. Background Art

[0002] The broad understanding of the reactor is a container with physical or chemical reactions. Through the structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are realized. The reactor is widely used in petroleum, chemical, rubber, pesticide, dye, medicine, food, and is used to complete the pressure vessels of the process such as vulcanization, nitration, hydrogenation, hydrocarbonization, polymerization, condensation, etc., such as reactors, reaction pots, decomposition pots, polymerization kettles, etc.; the materials are generally carbon manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel, Inconel) alloy and other composite materials. Among them, the mechanical seal of the reactor stirring shaft is the key component of the reactor and the first line of defense for the safe production of medicines. Therefore, it is very important to study the mechanical seal of the reactor stirring shaft.

[0003] For example, a document with publication number CN113522190A discloses a sealing structure for a stirring shaft of a reactor. The invention provides an anti-expansion protection mechanism and an oil pressure support portion, and utilizes the abutment between the anti-expansion protection mechanism and the rotating shaft. When the shaft sealing component expands due to heat, the anti-expansion top rubber and the anti-expansion gap can be pressed to eliminate the influence of the expansion. The oil pressure support portion can continue to support and protect the rotating shaft through the top support rod after the shaft sealing component expands due to heat, so as to maintain the stability of the rotating shaft.

[0004] However, in the above structure, although the anti-corrosion support ring and the anti-corrosion flange cover are used to provide double protection for the connection between the rotating shaft and the kettle body and the inner side of the kettle body respectively, polarization force will be generated when the rotating shaft rotates at high speed, resulting in a gap between the contact between the rotating shaft and the anti-corrosion support ring and the anti-corrosion flange. At this time, oil stains will penetrate into the reactor body, causing the oil stains to directly mix with the drugs in the reactor, resulting in the entire tank of drugs being directly scrapped due to contamination. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to solve the above technical problems, the present invention provides a sealing device for preventing pollution of a stirring shaft of a reactor.

[0007] (II) Technical solution

[0008] Based on this, the present invention provides the following technical solution: a sealing device for anti-pollution of a stirring shaft of a reactor, comprising a reactor cover end and a stirring shaft;

[0009] A sleeve is sleeved between the reactor cover end and the stirring shaft, the outer side of the bottom of the sleeve is welded to the inner side of the reactor cover end, the reactor cover end is located at the top of the end cover, the sleeve is fixed to the bottom of the end cover, and a static ring is embedded and installed on the inner side of the end cover;

[0010] A dynamic ring is arranged on the top of the static ring, the dynamic ring is fixed to the bottom of the spring, and a spring seat is installed on the top of the spring, the top of the spring seat is locked and fixed with a screw and a pressure cover, an O-ring is arranged at the connection between the spring seat and the stirring shaft, a stepped hole is opened at the left end of the reactor cover end, and a sealing mechanism is arranged at the upper left end of the reactor cover end.

[0011] Preferably, the static ring and the dynamic ring are concentrically arranged, and the static ring and the dynamic ring are nested with each other.

[0012] Preferably, a connecting boss is provided at the left end of the stepped hole.

[0013] Preferably, the sealing mechanism includes a guide cylinder, a sliding block, a positioning mechanism, a sealing seat one, a sealing seat two, and a sealing seat three. The right end of the bottom of the guide cylinder is fixed to the cover end of the reactor, the sliding block is slidably matched with the inner side of the guide cylinder, the right end of the sliding block is provided with a positioning mechanism, a sealing seat one is fixed to the bottom of the sliding block, the sealing seat one is slidably connected to the upper left end of the sealing seat two, and the sealing seat two is slidably connected to the upper left end of the sealing seat three.

[0014] Preferably, the right end of the guide cylinder is provided with insertion holes at the upper and lower sides thereof.

[0015] Preferably, a first slide groove is provided at the right end of the first blocking seat, and a second slide groove is provided at the right end of the second blocking seat.

[0016] Preferably, a slide rail 1 is provided at the left end of the blocking seat 2, and the slide rail 1 slides with the inner side of the slide groove 1. A limiting block 1 is provided at the upper end of the slide rail 1, and a pulley 1 is movably connected to the left end of the bottom of the blocking seat 2.

[0017] Preferably, a slide rail 2 is provided at the left end of the blocking seat 3, and the slide rail 2 slides with the inner side of the slide groove 2. A limit seat 2 is provided at the upper end of the slide rail 2, and a pulley 2 and a slide 3 are relatively provided on the left and right sides of the left end of the blocking seat 3.

[0018] Preferably, the positioning mechanism includes a sliding rod, a top support piece, a positioning rod, an insertion rod, and a return spring. The left end of the sliding rod is fixed to the sliding block, the sliding rod is slidingly matched with the inner side of the right end of the guide cylinder, the sliding rod is slidingly matched with the left end of the insertion rod, and the insertion rod is embedded in the inner side of the right end of the sliding rod, the left end of the return spring is fixed to the sliding rod, the right end of the return spring is fixed to the insertion rod, and the right end of the insertion rod is fixedly connected to the top support piece. Positioning rods are relatively provided on the front and rear sides of the top support piece, and the positioning rods are all cylindrical structures, and the positioning rods are plugged into the socket of the guide cylinder.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a sealing device for preventing pollution of a stirring shaft of a reactor, which has the following beneficial effects:

[0021] The anti-pollution sealing device for the stirring shaft of a reactor prevents oil or foreign matter from directly entering the reactor tank body and causing direct waste of medicines through the cooperation of a sleeve, a dynamic ring, a static ring and an O-ring, and at the same time increases the sealing effect with the stirring shaft, and the oil is discharged to the outside of the reactor through the stepped hole. The screw is rotated to drive the pressure cover to press down the spring seat, and the degree of compression of the spring on the dynamic ring can be adjusted. In addition, a sealing mechanism is provided to seal the stepped hole, thereby realizing double sealing, increasing the sealing performance, and preventing foreign matter or oil from directly entering and clogging the stepped hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the blocking mechanism of the present invention;

[0024] Figure 3 This is a structural schematic diagram of the first form of the blocking mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the blocking mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of a partially expanded structure of the blocking mechanism of the present invention;

[0027] Figure 6 It is a front view structural schematic diagram of the positioning mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the positioning mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the partial three-dimensional structure of the positioning mechanism of the present invention.

[0030] In the figure: 1, reactor cover end; 2, sleeve; 3, stirring shaft; 4, end cover; 5, stationary ring; 6, moving ring; 7, spring; 8, gland; 9, screw; 10, O-ring; 11, stepped hole; 12, plugging mechanism; 111, connecting convex seat; 121, guide cylinder; 122, sliding block; 123, positioning mechanism; 124, plugging seat 1; 125, plugging seat 2; 126, sealing Block seat three; 1241, slide slot one; 1254, slide slot two; 1251, slide rail one; 1252, limit block one; 1253, pulley one; 1261, slide rail two; 1262, limit seat two; 1263, pulley two; 1264, slide three; 1231, slide rod; 1232, top support plate; 1233, positioning rod; 1234, insertion rod; 1235, reset spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 8 , a sealing device for preventing pollution of a stirring shaft of a reactor, specifically including the following embodiments:

[0033] It includes a reactor cover end 1 and a stirring shaft 3; a sleeve 2 is sleeved between the reactor cover end 1 and the stirring shaft 3, the bottom outer side of the sleeve 2 is welded to the inner side of the reactor cover end 1, the reactor cover end 1 is located at the top of the end cover 4, the sleeve 2 is fixed to the bottom of the end cover 4, and a static ring 5 is embedded and installed on the inner side of the end cover 4; a dynamic ring 6 is arranged on the top of the static ring 5, the dynamic ring 6 is fixed to the bottom of the spring 7, and a spring seat is installed on the top of the spring 7, the top of the spring seat is locked and fixed with a screw 9 and a pressure cover 8, an O-ring 10 is arranged at the connection between the spring seat and the stirring shaft 3, a stepped hole 11 is opened at the left end of the reactor cover end 1, a sealing mechanism 12 is arranged at the upper left end of the reactor cover end 1, the static ring 5 and the dynamic ring 6 are concentrically arranged, and the static ring 5 and the dynamic ring 6 are nested with each other, and a connecting convex seat 111 is arranged at the left end of the stepped hole 11.

[0034] In some embodiments, the stationary ring 5 can be made of graphite material, the dynamic ring 6 can be made of silicon carbide material, and the O-ring 10 can be made of fluororubber material. During installation, the gland 8 should be tightened after the coupling is aligned. The screws 9 should be evenly supported to prevent the end face of the gland 8 from being skewed. Use a feeler gauge to check each point, and the error should not be greater than 0.05 mm. Check the matching clearance (i.e. concentricity) between the gland 8 and the outer diameter of the stirring shaft 3 or the sleeve 2. The surroundings should be uniform. Use a feeler gauge to check each point. The tolerance is no more than 0.01 mm. The compression amount of the spring 7 should be carried out according to regulations. It is not allowed to be too large or too small. The error is required to be 2.00 mm. A larger value will increase the end face pressure ratio and accelerate the end face wear. A too small value will cause insufficient pressure ratio and fail to play a sealing role. The left end of the stepped hole 11 can be connected to a vacuum device to extract the oil and prevent the oil from clogging the stepped hole 11. The sleeve 2, the dynamic ring 6, the static ring 5, and the O-ring 10 cooperate to prevent oil or foreign matter from directly entering the reactor tank body and causing a decrease in the quality of drug production in the reactor. At the same time, by increasing the sealing effect with the stirring shaft 3, the oil is discharged to the outside of the reactor through the stepped hole 11. The screw 9 is rotated to make the screw 9 drive the pressure cover 8 to press down the spring seat, and the degree of compression of the spring 7 on the dynamic ring 6 can be adjusted.

[0035] In some embodiments, the blocking mechanism 12 includes a guide cylinder 121, a sliding block 122, a positioning mechanism 123, a blocking seat 124, a blocking seat 2 125, and a blocking seat 3 126. The right end of the bottom of the guide cylinder 121 is fixed to the reactor cover end 1, the sliding block 122 is slidably matched with the inner side of the guide cylinder 121, and the right end of the sliding block 122 is provided with a positioning mechanism 123. The bottom of the sliding block 122 is fixed with a blocking seat 124, the blocking seat 124 is slidably connected to the upper left end of the blocking seat 2 125, and the blocking seat 2 125 is slidably connected to the upper left end of the blocking seat 3 126. The right end of the guide cylinder 121 is provided with jacks on the upper and lower sides, the right end of the blocking seat 1 124 is provided with a slide groove 1241, and the blocking seat 2 125 is provided with a slide groove 1241. A slide groove 1254 is provided at the right end, a slide rail 1251 is provided at the left end of the blocking seat 125, the slide rail 1251 slides with the inner side of the slide groove 1241, a limit block 1252 is provided at the upper end of the slide rail 1251, a pulley 1253 is movably connected to the left end of the bottom of the blocking seat 125, a slide rail 1261 is provided at the left end of the blocking seat 3 126, the slide rail 1261 slides with the inner side of the slide groove 1254, a limit seat 2 1262 is provided at the upper end of the slide rail 1261, pulley 2 1263 and slide 3 1264 are provided on the left and right sides of the left end of the blocking seat 3 126, and the pulley 1253, the pulley 1263 and the slide 3 1264 play a role of contact and guidance with the connecting convex seat 111.

[0036] In some embodiments, the positioning mechanism 123 includes a sliding rod 1231, a top support piece 1232, a positioning rod 1233, an insertion rod 1234, and a return spring 1235. The left end of the sliding rod 1231 is fixed to the sliding block 122, the sliding rod 1231 is slidably matched with the inner side of the right end of the guide cylinder 121, the sliding rod 1231 is slidably matched with the left end of the insertion rod 1234, and the insertion rod 1234 is embedded in the inner side of the right end of the sliding rod 1231, the left end of the return spring 1235 is fixed to the sliding rod 1231, the right end of the return spring 1235 is fixed to the insertion rod 1234, and the right end of the insertion rod 1234 is fixedly connected to the top support piece 1232. Positioning rods 1233 are relatively provided on the front and rear sides of the top support piece 1232. The positioning rods 1233 are all cylindrical structures, and the positioning rods 1233 are plugged into the socket of the guide cylinder 121.

[0037] In the present application, when the stepped hole 11 is not connected to a vacuum device or is being exhausted, the top support piece 1232 can be pulled to the right end, so that the top support piece 1232 slides to the right end in the slide bar 1231 through the insertion rod 1234, and drives the return spring 1235 to extend, so that the positioning rod 1233 on the top support piece 1232 releases the positioning of the insertion hole of the guide cylinder 121, and then the slide bar 1231 can be moved downward to make the slide bar 1231 231 drives the sliding block 122 to move toward the lower end of the guide cylinder 121. When the sliding block 122 moves downward, the blocking seat 3 126 first contacts the top of the connecting protrusion 111, and then the blocking seat 3 126 slides to the inner side of the sliding groove 2 1254 through the sliding rail 2 1261. When the blocking seat 3 126 and the blocking seat 2 125 are flush with each other, the blocking seat 2 125 slides into the sliding groove 1 1241 through the sliding rail 1251. Figure 3 As shown, the blocking seat 2 125 and the blocking seat 3 126 can be embedded in the stepped hole 11 to block and seal the stepped hole 11, thereby achieving double blocking and increasing the sealing performance, preventing debris or oil from directly entering and blocking the stepped hole 11, and effectively improving the production quality of the medicines in the reactor. At the same time, when the blocking operation is completed, the sliding block 122 moves to the lower end of the guide cylinder 121, and then the pulling force on the top support piece 1232 is released. The elastic potential energy of the deformation is restored by the reset spring 1235 to drive the top support piece 1232 to reset, and then the positioning rod 1233 is embedded in the lower end socket of the guide cylinder 121 to position the sliding block 122. When the vacuum device needs to be connected, the sliding block 122 can be moved up, which will not affect the normal use of the stepped hole 11.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for preventing pollution of a stirring shaft of a reactor, characterized in that: It comprises a reactor cover end (1) and a stirring shaft (3); A sleeve (2) is sleeved between the reactor cover end (1) and the stirring shaft (3); the outer side of the bottom of the sleeve (2) is welded to the inner side of the reactor cover end (1); the reactor cover end (1) is located on the top of the end cover (4); the sleeve (2) is fixed to the bottom of the end cover (4); and a stationary ring (5) is embedded and installed on the inner side of the end cover (4); A moving ring (6) is arranged on the top of the static ring (5), the moving ring (6) is fixed to the bottom of the spring (7), and a spring seat is installed on the top of the spring (7), the top of the spring seat is locked and fixed with a screw (9) and a gland (8), an O-ring (10) is arranged at the connection between the spring seat and the stirring shaft (3), a stepped hole (11) is opened at the left end of the reactor cover end (1), and a blocking mechanism (12) is arranged at the upper left end of the reactor cover end (1); The blocking mechanism (12) comprises a guide cylinder (121), a sliding block (122), a positioning mechanism (123), a blocking seat 1 (124), a blocking seat 2 (125), and a blocking seat 3 (126); the right end of the bottom of the guide cylinder (121) is fixed to the reactor cover end (1); the sliding block (122) is slidably matched with the inner side of the guide cylinder (121); the right end of the sliding block (122) is provided with a positioning mechanism (123); the bottom of the sliding block (122) is fixed with a blocking seat 1 (124); the blocking seat 1 (124) is slidably connected to the upper left end of the blocking seat 2 (125); and the blocking seat 2 (125) is slidably connected to the upper left end of the blocking seat 3 (126); The positioning mechanism (123) comprises a sliding rod (1231), a top support piece (1232), a positioning rod (1233), an insertion rod (1234), and a return spring (1235); the left end of the sliding rod (1231) is fixed to the sliding block (122); the sliding rod (1231) is slidably matched with the inner side of the right end of the guide cylinder (121); the sliding rod (1231) is slidably matched with the left end of the insertion rod (1234), and the insertion rod (1234) is embedded in the inner side of the right end of the sliding rod (1231); the left end of the return spring (1235) is fixed to the sliding rod (1231); the right end of the return spring (1235) is fixed to the insertion rod (1234); the right end of the insertion rod (1234) is fixedly connected to the top support piece (1232); and the positioning rods (1233) are provided on the front and rear sides of the top support piece (1232) opposite to each other.

2. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: The static ring (5) and the dynamic ring (6) are arranged concentrically, and the static ring (5) and the dynamic ring (6) are arranged to be nested with each other.

3. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: A connecting convex seat (111) is provided at the left end of the stepped hole (11).

4. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: The right end of the guide cylinder (121) is provided with insertion holes at the upper and lower sides thereof.

5. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: The right end of the blocking seat 1 (124) is provided with a slide groove 1 (1241), and the right end of the blocking seat 2 (125) is provided with a slide groove 2 (1254).

6. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: A slide rail 1 (1251) is provided at the left end of the second blocking seat (125), and the slide rail 1 (1251) is slidably matched with the inner side of the slide groove 1 (1241). A limit block 1 (1252) is provided at the upper end of the slide rail 1 (1251), and a pulley 1 (1253) is movably connected to the left end of the bottom of the second blocking seat (125).

7. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: A slide rail 2 (1261) is provided at the left end of the blocking seat 3 (126), and the slide rail 2 (1261) is slidably matched with the inner side of the slide groove 2 (1254). A limit seat 2 (1262) is provided at the upper end of the slide rail 2 (1261), and a pulley 2 (1263) and a slide 3 (1264) are provided on the left and right sides of the left end of the blocking seat 3 (126).

8. The anti-pollution sealing device for a stirring shaft of a reactor according to claim 1, characterized in that: The positioning rods (1233) are all cylindrical structures.

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