Sealing series protection sealing device for PVC bottom stirring mechanical seal

Abstract

The utility model relates to the technical field of mechanical seal series connection protection sealing devices, and discloses a PVC bottom stirring mechanical seal series connection protection sealing device which comprises a shaft sleeve, a clamping spring and a movable ring base are arranged outside the shaft sleeve, a movable ring base O-shaped ring is arranged between the movable ring base and the shaft sleeve, and a shaft sleeve O-shaped ring is installed on the inner wall of the shaft sleeve. The bearing cavity assembly is arranged, bearing support is provided between the shaft sleeve and the mechanical sealing device, swing of the mechanical sealing device relative to the shaft when the stirrer works is effectively reduced, the sealing performance is improved, the floating type sealing ring structure is adopted, it is ensured that the movable ring base is perpendicular to the shaft sleeve, and sealing face deviation caused by tightening of a jackscrew is avoided; the sealing surface perpendicularity of the movable ring and the static ring is guaranteed, the leakage risk during operation is reduced, double-sealing protection is achieved through the tandem type sealing structure, when the first-stage sealing fails, the second-stage sealing can prevent medium leakage, the sealing reliability is improved, and the sealing structure is suitable for production scenes of flammable and explosive or toxic substances.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal series connection protection sealing device technical field, concretely is a kind of PVC bottom stirring mechanical seal series connection protection sealing device. BACKGROUND

[0002] In the PVC production process, to improve product quality and meet the production process requirements, production equipment needs continuous operation, mechanical seal needs to ensure that the PVC powder of shaft seal is not leaked, so the running condition of mechanical seal has great influence on the production benefit of device. However, the perpendicularity of the original matched medium side sealing moving ring installation structure is large, the moving ring sealing surface is large when using, which is easy to cause sealing leakage failure, the original sealing of equipment has problems such as short service life and frequent replacement, and cannot meet the use demand of customer. UTILITY MODEL CONTENTS

[0003] The technical problem to be solved by the utility model is to provide a PVC bottom stirring mechanical seal series connection protection sealing device in view of the above-mentioned deficiencies in the prior art.

[0004] To solve the above-mentioned technical problem, the utility model adopts the technical scheme of a kind of PVC bottom stirring mechanical seal series connection protection sealing device, including shaft sleeve, the outside of the shaft sleeve is provided with snap spring and moving ring seat, moving ring seat O ring is arranged between the moving ring seat and the shaft sleeve, shaft sleeve O ring is installed on the inner wall of the shaft sleeve, the bottom of the moving ring seat is provided with medium side moving ring and moving ring O ring one, the bottom of the medium side moving ring is provided with medium side static ring and static ring O ring one, the bottom of the medium side static ring is provided with static ring inner sleeve, cavity and static ring, the bottom of the static ring is provided with baffle ring, moving ring one and moving ring two, the outside of the shaft sleeve is provided with spring seat, push ring, spring is arranged on the spring seat, the bottom of the moving ring two is provided with atmospheric side static ring and static ring seat, the outside of the shaft sleeve is provided with bearing inner sleeve and bearing, bearing seat is arranged on the bearing, round nut is arranged on the bottom of the bearing seat, the bottom of the shaft sleeve is provided with oblique type ring, the outside of the shaft sleeve is provided with skeleton oil seal, the outside of the skeleton oil seal is provided with cavity O ring.

[0005] Preferably, the left side of the static ring O ring one is provided with static ring O ring two, the outside of the static ring is provided with static ring O ring three, static ring O ring four is arranged between the atmospheric side static ring and the static ring seat.

[0006] Preferably, moving ring O ring two is arranged between the moving ring one and the shaft sleeve, and moving ring O ring three is arranged between the moving ring two and the shaft sleeve.

[0007] Preferably, oil nozzle is arranged on the bearing seat, gland is arranged on the bottom of the bearing seat, limit plate and lifting ring screw are arranged on the bottom of the gland.

[0008] Preferably, bolts are arranged on the bearing seat and the static ring seat, nuts are threadedly connected with the bolts, a screw one is arranged on the top of the shaft sleeve, a screw two and a screw three are arranged on the bottom of the cavity, a screw four is arranged on the limiting plate, a screw five and an outer hexagonal bolt are arranged on the round nut, and a screw six is arranged on the bearing inner sleeve.

[0009] Preferably, a cooling water inlet and an isolation liquid inlet are arranged on the right side of the shaft sleeve, a cooling water outlet and an isolation liquid outlet are arranged on the left side of the shaft sleeve, an oil inlet and a leakage port are arranged on the static ring seat.

[0010] The above technical solution can bring the following beneficial effects:

[0011] The PVC bottom stirring mechanical seal series protection sealing device provides bearing support between the shaft sleeve and the mechanical sealing device through the bearing cavity assembly, effectively reduces the swing of the mechanical sealing device relative to the shaft during the operation of the stirrer, improves the sealing performance, adopts the floating type sealing ring structure, ensures that the dynamic ring seat is perpendicular to the shaft sleeve, avoids the sealing surface deviation caused by the tightening of the top screw, ensures the perpendicularity of the dynamic and static ring sealing surfaces, reduces the leakage risk during operation, realizes double sealing protection through the series sealing structure, prevents medium leakage when the primary sealing fails, improves the sealing reliability, is suitable for the production scene of flammable, explosive or toxic substances, and has the advantages of set design, external flushing and cooling structure and the application of silicon carbide and other wear-resistant materials, significantly improves the service life of the mechanical sealing, reduces the replacement frequency, provides protection for the continuous and stable operation of the device, improves the production efficiency, and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a front view of the utility model;

[0013] Fig. 2 It is a top view of the utility model.

[0014] In the figure: 1, the card spring; 2, the moving ring seat; 3, the moving ring seat O ring; 4, the shaft sleeve O ring; 5, the moving ring O ring one; 6, the medium side moving ring; 7, the medium side static ring; 8, the static ring O ring one; 9, the static ring O ring two; 10, screw one; 11, the static ring inner sleeve; 12, the cavity; 13, the static ring O ring three; 14, the static ring; 15, the blocking ring; 16, screw two; 17, the moving ring one; 18, the moving ring O ring two; 19, the shaft sleeve; 20, the spring seat; 21, the spring; 22, the pushing ring; 23, the moving ring O ring three; 24, the atmospheric side static ring; 25, the static ring O ring four; 26, the static ring seat; 27, screw three; 28, the bearing inner sleeve; 29, the bearing; 30, the bearing seat; 31, the oil nozzle; 32, the gland; 33, the limiting plate; 34, screw four; 35, the lifting ring screw; 36, the round nut; 37, the nut; 38, the bolt; 39, the inclined type ring; 40, screw five; 41, screw six; 42, the skeleton oil seal; 43, the outer hexagonal screw; 44, the cavity O ring; 45, the cooling liquid inlet; 46, the isolation liquid inlet; 47, the cooling liquid outlet; 48, the isolation liquid outlet. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0016] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms 'upper', 'lower', 'front','rear', 'left', 'right', 'top', 'bottom', 'inner', 'outer' and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0017] In the description of the utility model, it needs to be explained that, unless explicitly specified and limited, the terms'mounting', 'connecting','setting' should be understood broadly, for example, can be fixedly connected, set, or can be detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0018] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more than two, unless otherwise explicitly specified.

[0019] As shown in Figs. 1-2 The utility model provides a kind of PVC bottom stirring mechanical seal series protection sealing device, including shaft sleeve 19, the outside of shaft sleeve 19 is provided with snap spring 1 and dynamic ring seat 2, dynamic ring seat O-ring 3 is provided between dynamic ring seat 2 and shaft sleeve 19, shaft sleeve O-ring 4 is installed in the inner wall of shaft sleeve 19, the bottom of dynamic ring seat 2 is provided with medium side dynamic ring 6 and dynamic ring O-ring one 5, the bottom of medium side dynamic ring 6 is provided with medium side static ring 7 and static ring O-ring one 8, the bottom of medium side static ring 7 is provided with static ring inner sleeve 11, cavity 12 and static ring 14, the bottom of static ring 14 is provided with baffle ring 15, dynamic ring one 17 and dynamic ring two, the outside of shaft sleeve 19 is provided with spring seat 20, push ring 22, spring 21 is provided on spring seat 20, the bottom of dynamic ring two is provided with atmospheric side static ring 24 and static ring seat 26, atmospheric side static ring 24 uses inlaying alloy structure, the outside of shaft sleeve 19 is provided with bearing inner sleeve 28 and bearing 29, bearing 29 is provided with bearing seat 30, the bottom of bearing seat 30 is provided with round nut 36, the bottom of shaft sleeve 19 is provided with oblique type ring 39, the outside of shaft sleeve 19 is provided with skeleton oil seal 42, the outside of skeleton oil seal 42 is provided with cavity O-ring 44, static ring O-ring two 9 is provided at the left side of static ring O-ring one 8, the outside of static ring 14 is provided with static ring O-ring three 13, static ring O-ring four 25 is provided between atmospheric side static ring 24 and static ring seat 26, dynamic ring O-ring two 18 is provided between dynamic ring one 17 and shaft sleeve 19, dynamic ring O-ring three 23 is provided between dynamic ring two and shaft sleeve 19, the right side of shaft sleeve 19 is provided with cooling water inlet 45 and isolation liquid inlet 46, the left side of shaft sleeve 19 is provided with cooling water outlet 47 and isolation liquid outlet 48, oil inlet and leakage port are provided on static ring seat 26, medium side dynamic ring 6 and medium side static ring 7 adopt the whole structure silicon carbide material, dynamic ring seat 2 is fixed by snap spring positioning top wire to guarantee the parallelism of dynamic ring and shaft.

[0020] Specifically, the medium side dynamic ring 6 is installed on the dynamic ring seat 2 through an O-shaped ring and positioned in the groove of the shaft sleeve 19 by the snap spring 1; the atmospheric side static ring 24 is fixed by a screw, the cavity spring hole is equipped with another spring, the two side grooves are sealed by O-shaped rings, the static ring 14 is positioned by an anti-rotation pin, the dynamic and static ring sealing surfaces are ensured to be in close contact, the atmospheric side dynamic ring 24, the push ring 22, the spring seat 20 and the like are sequentially installed on the shaft sleeve 19, and the spring 21 provides elastic force to ensure that the sealing surfaces are in close contact. The bearing cavity assembly is installed with a bearing 29 to support the mechanical sealing device and reduce swing; the shaft sleeve 19 is fixed by a round nut 36, the sealing cavity can be externally washed and cooled to improve the service life of the mechanical seal; the device adopts a set type mechanical seal, a three-group sealing friction pair built-in series structure, the medium side mechanical seal contacts the medium material and serves as a primary seal; the atmospheric side is a double-end surface mechanical seal and serves as a secondary protective seal, which can play a protective role when the primary seal fails to prevent medium leakage.

[0021] In the embodiment, the bearing seat 30 is provided with an oil nozzle 31, the bottom of the bearing seat 30 is provided with a gland 32, and the bottom of the gland 32 is provided with a limiting plate 33 and a lifting ring screw 35.

[0022] Specifically, the oil nozzle 31 is arranged to facilitate the addition of lubricating oil into the bearing seat 30, and the lifting ring screw 35 is arranged to facilitate the hoisting of the device.

[0023] In the embodiment, the bearing seat 30 and the static ring seat 26 are provided with bolts 38, the bolts 38 are threadedly connected with nuts 37, the top of the shaft sleeve 19 is provided with a screw one 10, the bottom of the cavity 12 is provided with a screw two 16 and a screw three 27, the limiting plate 33 is provided with a screw four 34, the round nut 36 is provided with a screw five 40 and an external hexagonal bolt 43, and the bearing inner sleeve 28 is provided with a screw six 41.

[0024] Specifically, the bolts 38 and the nuts 37 are arranged to fix the gland 32, the bearing seat 30 and the static ring seat 26, the external hexagonal bolt 43 is arranged to fix the main shaft rotation, the screw one 10 is an internal hexagonal concave end set screw, the screw two 16 and the screw three 27 are both internal hexagonal cylindrical head screws, the screw four 34 is a full-thread C-class hexagonal head bolt, the screw five 40 is an internal hexagonal flat end set screw, and the screw six 41 is an internal hexagonal tapered end set screw, all of which have a fixing effect.

[0025] It should be noted that all the matters not described in the above description are prior art and are not main innovation points, and will not be described in detail here.

[0026] The utility model provides a kind of PVC bottom stirring mechanical seal series protection sealing device, the method and approach of the specific implementation of this technical scheme are many, above is only the preferred embodiment of the utility model, it should be pointed out, for the ordinary skilled person in the art, without departing from the principle of the utility model, still can make several improvements and refinements under the premise, these improvements and refinements should also be considered as the protection scope of the utility model. The components not specified in the embodiment can be implemented using existing technology.

Claims

1. A PVC bottom agitator mechanical seal tandem protection seal device comprising a bushing (19), characterized in that: The outer part of the shaft sleeve (19) is provided with a circlip (1) and a movable ring seat (2), an O-ring (3) is arranged between the movable ring seat (2) and the shaft sleeve (19), an O-ring (4) is arranged on the inner wall of the shaft sleeve (19), a medium-side movable ring (6) and an O-ring (5) are arranged on the bottom of the movable ring seat (2), a medium-side static ring (7) and an O-ring (8) are arranged on the bottom of the medium-side movable ring (6), a static ring inner sleeve (11), a cavity (12) and a static ring (14) are arranged on the bottom of the medium-side static ring (7), a blocking ring (15), a movable ring (17) and a movable ring (2) are arranged on the bottom of the static ring (14), a spring seat (20) and a push ring (22) are arranged on the outer part of the shaft sleeve (19), a spring (21) is arranged on the spring seat (20), a medium-side static ring (24) and a static ring seat (26) are arranged on the bottom of the movable ring (2), a bearing inner sleeve (28) and a bearing (29) are arranged on the outer part of the shaft sleeve (19), a bearing seat (30) is arranged on the bearing (29), a round nut (36) is arranged on the bottom of the bearing seat (30), an inclined ring (39) is arranged on the bottom of the shaft sleeve (19), a skeleton oil seal (42) is arranged on the outer part of the skeleton oil seal (42), and a cavity O-ring (44) is arranged on the outer part of the skeleton oil seal (42).

2. A PVC bottom agitator mechanical seal tandem protection seal device according to claim 1, characterized in that: The left side of the static ring O-ring (8) is provided with a static ring O-ring (9), the outer part of the static ring (14) is provided with a static ring O-ring (13), and the static ring O-ring (25) is arranged between the atmospheric-side static ring (24) and the static ring seat (26).

3. A PVC bottom agitator mechanical seal tandem protection seal device according to claim 1, characterized in that: The movable ring O-ring (18) is arranged between the movable ring (17) and the shaft sleeve (19), and the movable ring O-ring (23) is arranged between the movable ring (2) and the shaft sleeve (19).

4. A PVC bottom agitator mechanical seal tandem protection seal apparatus as described in claim 1, wherein: The oil nozzle (31) is arranged on the bearing seat (30), the gland (32) is arranged on the bottom of the bearing seat (30), the limiting plate (33) and the lifting ring screw (35) are arranged on the bottom of the gland (32).

5. A PVC bottom agitator mechanical seal tandem protection seal apparatus as claimed in claim 4, wherein: The bolts (38) are arranged on the bearing seat (30) and the static ring seat (26), and the nuts (37) are threadedly connected with the bolts (38), the screw (10) is arranged on the top of the shaft sleeve (19), the screws (16) and (27) are arranged on the bottom of the cavity (12), the screw (34) is arranged on the limiting plate (33), the screws (40) and (43) are arranged on the round nut (36), and the screw (41) is arranged on the bearing inner sleeve (28).

6. A PVC bottom agitator mechanical seal tandem protection seal apparatus as described in claim 1, wherein: The cooling water inlet (45) and the isolation liquid inlet (46) are arranged on the right side of the shaft sleeve (19), the cooling water outlet (47) and the isolation liquid outlet (48) are arranged on the left side of the shaft sleeve (19), and the oil filling port and the leakage port are arranged on the static ring seat (26).

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