Inverted vertical stirring sealing structure

Abstract

The utility model discloses an inverted vertical stirring sealing structure which comprises a first sealing assembly and a second sealing assembly. The first sealing assembly comprises a shaft sleeve fixed on the shaft through a screw; the positioning ring is a connecting and positioning part of the upper seat body and the lower seat body; the spring energy storage type sealing rings are arranged above and below the positioning ring in a back-to-back manner; and the lower seat body and the upper seat body are fixed below the packing gland through bolts. The second sealing assembly comprises a stuffing box; the polytetrafluoroethylene shaft sleeve is assembled above the stuffing box; a V-shaped filler assembly; the water blocking ring is arranged between the two groups of V-shaped filler assemblies; and the packing gland is arranged below the packing box. When the spring energy storage type sealing ring in the first sealing assembly is abraded for a long operation period and cannot achieve complete sealing, the packing gland can be pressed, and the second sealing assembly plays a role. The first sealing assembly and the second sealing assembly play a role successively, a double-insurance sealing mode is achieved, the sealing effect is good, and the operation period is long.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid sealing structures, in particular to the technical field of inverted vertical stirring seals. Background Art

[0002] In the chemical industry, stirred tanks or stirred vessels are often used in physical or chemical reaction processes.

[0003] Generally, the stirring of the mixing kettle is inverted stirring, and its shaft seal structure is mostly a packing seal structure plus flushing water recovery. The stirring shaft has a certain shaft swing amplitude during operation, and it cannot be completely sealed during operation. It is often necessary to tighten the packing gland to reduce leakage. In addition, untimely tightening often causes increased leakage, untimely recovery, or corrosive materials that corrode the reducer. Therefore, a shaft seal structure that can achieve no leakage is urgently needed. Utility Model Content

[0004] In order to solve the problem that the above-mentioned packing seal structure cannot achieve leakage-free, the utility model provides an inverted vertical stirring sealing structure, which adopts a combined sealing structure of a V-shaped packing seal and a compensating seal, and can realize a double insurance sealing mode of an inverted vertical stirring, with good sealing effect and long operating cycle.

[0005] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0006] An inverted vertical stirring sealing structure comprises: a first sealing component and a second sealing component, wherein the first sealing component is located below the second sealing component so that a shaft can pass through the first sealing component and the second sealing component;

[0007] The first sealing assembly comprises: an upper seat body, two spring energy storage sealing rings, two adjustment pads, a positioning ring, a lower seat body, a shaft sleeve, and a positioning screw;

[0008] The second sealing assembly includes: a polytetrafluoroethylene sleeve, a stuffing box, a V-shaped stuffing assembly, a water blocking ring, and a stuffing gland;

[0009] A water inlet is arranged in the middle of the stuffing box, and a flange is arranged at the bottom; the PTFE sleeve is assembled above the stuffing box and between the shaft and the stuffing box to fix the shaft in the radial direction; the packing gland is arranged below the stuffing box; the V-shaped packing assembly and the water blocking ring are arranged in the stuffing box and sandwiched between the PTFE sleeve and the packing gland; the V-shaped packing assembly is divided into two groups, and a water blocking ring is arranged between the two groups of V-shaped packing assemblies; the water blocking ring has a ring hole and a ring groove, and the ring hole of the water blocking ring is at the same level as the water inlet of the stuffing box;

[0010] The first sealing assembly is composed of an upper seat body, a spring energy storage type sealing ring, an adjustment pad, a positioning ring, another adjustment pad, another spring energy storage type sealing ring, and a lower seat body from top to bottom; the shaft sleeve passes through the upper seat body, two spring energy storage type sealing rings, two adjustment pads, a positioning ring, and the lower seat body, the upper end of the shaft sleeve is pushed under the packing gland, and a threaded hole is arranged under the shaft sleeve to match the positioning hole under the shaft through a positioning screw, so that the shaft sleeve is fixed on the shaft;

[0011] The lower seat body and the upper seat body are fixed below the packing gland by bolts;

[0012] The stuffing box is fixedly connected with the stuffing gland, the upper seat body and the lower seat body through the flange and studs of the stuffing box.

[0013] As a further technical solution, the lower seat body and the upper seat body are provided with bolt holes, and the packing cover is provided with bolt holes and threaded holes; the lower seat body and the upper seat body are fixed to the threaded holes of the packing cover by passing through the bolt holes of the lower seat body and the upper seat body by means of single-head bolts; the studs are passed through the flange of the stuffing box, and through the bolt holes of the stuffing cover, the upper seat body and the lower seat body in turn, and nuts are used to cooperate so that the stuffing box is fixedly connected to the stuffing cover, the upper seat body and the lower seat body.

[0014] As a further technical solution, the V-shaped packing assembly is composed of a pressure ring, a V-shaped sealing ring and a support ring from top to bottom, and there are multiple V-shaped sealing rings.

[0015] As a further technical solution, the first sealing assembly includes a baffle pad, a sealing ring is arranged between the upper outer side of the stuffing cover and the inner side of the lower end of the stuffing box, a gap is formed between the inner side of the stuffing cover and the shaft, the baffle pad is arranged between the lower end surface of the stuffing cover and the upper end surface of the sleeve, a sealing ring is arranged between the lower end surface of the stuffing cover and the upper end surface of the upper seat body, and two sealing rings are arranged between the upper inner side of the sleeve and the shaft.

[0016] As a further technical solution, an annular groove is provided inside the shaft sleeve to facilitate assembly with the shaft.

[0017] As a further technical solution, the inverted vertical stirring sealing structure includes: a shaft and a blade assembly; the shaft passes through the first sealing assembly and the second sealing assembly, and a positioning hole is provided under the shaft; the blade assembly is located in the stirring tank chamber and is used to stir the material.

[0018] As a further technical solution, the first sealing assembly includes a limit card, the single-head bolt fixes the limit card to the lower plane of the lower seat body, and the limit card is inserted into the outer ring groove of the sleeve.

[0019] As a further technical solution, the limit card has a strip-shaped hole and can move radially along the single-head bolt.

[0020] In the utility model, the first sealing component is a compensating seal, the second sealing component is a V-shaped packing seal, the first sealing component serves as a main sealing component, the second sealing component serves as an auxiliary sealing component, the first sealing component is located below the second sealing component, the first sealing component and the second sealing component play a role in succession, and a double insurance sealing mode of inverted vertical stirring can be realized, with good sealing effect and long operating cycle.

[0021] The first sealing component of the utility model is designed as a containerized structure, which is convenient and quick to disassemble and overhaul, and can realize leakage-free sealing as a main sealing component.

[0022] The second sealing component of the utility model uses a polyfluoro sleeve to effectively limit the radial runout caused by the rotation of the shaft, thereby reducing the wear of the V-shaped packing component and the spring energy storage type sealing ring.

[0023] The first sealing component of the utility model uses a spring energy storage type sealing ring with an automatic wear compensation function, so that the first sealing component has a longer service life.

[0024] The second sealing component of the utility model uses a water blocking ring to evenly arrange flushing water and lubricate the V-shaped packing component, thereby greatly improving the service life of the second sealing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional diagram of the inverted vertical stirring sealing structure;

[0026] Figure 2 It is a schematic diagram of the inverted vertical stirring sealing structure;

[0027] Figure 3 is a schematic structural diagram of a first sealing component;

[0028] Figure 4 for Figure 3 A magnified view of part A;

[0029] Figure 5 for Figure 3 A magnified view of part B;

[0030] Figure 6 for Figure 3 Enlarged view of part C;

[0031] Figure 7 is a schematic structural diagram of a second sealing component;

[0032] Figure 8 for Figure 7 A magnified view of the D portion;

[0033] Fig. 9 This is the schematic diagram of the limit card fixing the shaft sleeve.

[0034] Fig.10 Pull out a three-dimensional image of the sleeve for limiting the position.

[0035] Explanation of symbols in the accompanying drawings:

[0036] 10 stirring kettle; 11 blade assembly; 12 shaft; 120 positioning hole;

[0037] 2 second sealing assembly; 13 PTFE sleeve; 20 stuffing box; 200 water inlet; 201 flange; 21 V-shaped packing assembly; 210 pressure ring; 211 support ring; 212 V-shaped sealing ring; 22 water blocking ring; 220 ring hole; 221 ring groove; 23 packing gland; 230 bolt hole; 231 threaded hole;

[0038] 3 first sealing assembly; 30 upper seat; 300 bolt hole; 31 spring energy storage type sealing ring; 32 adjustment pad; 33 positioning ring; 34 lower seat; 340 bolt hole; 35 shaft sleeve; 350 threaded hole; 351 ring groove; 36 positioning screw; 37 limit card; 38 flow blocking pad;

[0039] 40 sealing ring; 41 single-head bolt; 42 stud; 43 hexagonal nut. DETAILED DESCRIPTION

[0040] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] like Figure 1-10 The figure shows an embodiment of an inverted vertical stirring sealing structure of the utility model.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 7 As shown, an inverted vertical stirring sealing structure includes: a first sealing component 3 and a second sealing component 2. The first sealing component is a compensating seal, the second sealing component is a V-shaped packing seal, the first sealing component is used as a main sealing component, the second sealing component is used as an auxiliary sealing component, and the first sealing component is located below the second sealing component.

[0043] The first sealing assembly 3 includes: an upper seat 30 , two spring energy storage sealing rings 31 , two adjustment pads 32 , a positioning ring 33 , a lower seat 34 , a shaft sleeve 35 , a positioning screw 36 , a limit card 37 and a flow-blocking pad 38 .

[0044] The second sealing assembly 2 includes: a polytetrafluoroethylene sleeve 13 , a stuffing box 20 , a V-shaped stuffing assembly 21 , a water blocking ring 22 and a stuffing gland 23 .

[0045] The shaft 12 passes through the first sealing assembly 3 and the second sealing assembly 2. The shaft 12 has a paddle assembly 11 above it and a positioning hole 120 below it. The paddle assembly 11 is located in the chamber of the stirring tank 10 and is used to stir the material.

[0046] The stuffing box 20 is located below the stirring tank 10, and a water inlet 200 is arranged in the middle of the stuffing box 20, and a flange 201 is arranged below. The polytetrafluoroethylene sleeve 13 is assembled above the stuffing box 20, between the shaft 12 and the stuffing box 20, and fixes the shaft 12 in the radial direction. The stuffing gland 23 is arranged below the stuffing box 20. The V-shaped packing assembly 21 and the water blocking ring 22 are arranged in the stuffing box 20, and are sandwiched between the polytetrafluoroethylene sleeve 13 and the stuffing gland 23. A sealing ring 40 is arranged between the outer side of the upper side of the stuffing gland 23 and the inner side of the lower end of the stuffing box 20, and there is a gap between the inner side of the stuffing gland 23 and the shaft 12. The flange below the stuffing gland 23 has uniformly distributed bolt holes 230 and threaded holes 231. A flow blocking pad 38 is arranged between the lower end face of the stuffing gland 23 and the upper end face of the sleeve 35, and a sealing ring 40 is arranged between the lower end face of the stuffing gland 23 and the upper end face of the upper seat body 30.

[0047] like Figure 7 As shown, the V-shaped packing components 21 in the second sealing component 2 are divided into two groups and placed in the stuffing box 20. A water blocking ring 22 is arranged between the two groups of V-shaped packing components 21. The water blocking ring 22 has a ring hole 220 and a ring groove 221. The ring hole 220 of the water blocking ring is at the same horizontal height as the water inlet 200 of the stuffing box. The flushing water entering from the water inlet 220 of the stuffing box will be distributed through the water blocking ring 22 and lubricate the V-shaped packing component 21, thereby preventing the V-shaped packing component 21 from dry grinding and shortening its service life.

[0048] like Figure 8 As shown, the V-shaped packing assembly 21 is composed of a pressure ring 210, a V-shaped sealing ring 212 and a support ring 211 from top to bottom.

[0049] like Figure 3-Figure 6As shown, the first sealing assembly 3 is assembled below the packing gland 23, and from top to bottom are an upper seat 30, a spring energy storage seal ring 31, an adjustment pad 32, a positioning ring 33, another adjustment pad 32, another spring energy storage seal ring 31, and a lower seat 34. The upper seat 30 and the lower seat 34 are both provided with uniformly distributed bolt holes 300 and 340. The shaft sleeve 35 passes through the upper seat 30, two spring energy storage seal rings 31, two adjustment pads 32, a positioning ring 33, and a lower seat 34 of the first sealing assembly 3. Two sealing rings 40 are arranged between the inner side of the upper part of the shaft sleeve 35 and the shaft 12. An annular groove 351 is arranged inside the shaft sleeve 35 to facilitate assembly with the shaft 12. A threaded hole 350 is arranged below the shaft sleeve 35, which can be matched with the positioning hole 120 below the shaft 12 through a positioning screw 36. The single-head bolt 41 penetrates the bolt holes 340 and 300 of the lower seat body 34 and the upper seat body 30 and is fastened to the threaded hole 231 of the packing gland 23. At the same time, the single-head bolt 41 fixes the limit card 37 to the lower plane of the lower seat body 34. The limit card 37 is inserted into the outer ring groove of the sleeve 35, so that the first sealing assembly 3 becomes a container structure, which is more convenient for assembly and maintenance. The limit card is used to fix the relative position of the sleeve and the lower seat body.

[0050] like Fig. 9 , Fig.10 As shown, the limiting card 37 has a strip-shaped hole and can move radially along the single-head bolt 41.

[0051] like Figure 2 As shown, the stud 42 is screwed onto the flange 201 of the stuffing box 20 , passes through the bolt holes 230 , 300 , 340 of the stuffing gland 23 , the upper seat body 30 , and the lower seat body 34 in sequence, and is evenly tightened using a hexagonal nut 43 .

[0052] The operation mode and principle of the utility model are as follows:

[0053] Combination Figure 1-Figure 10 When assembling the utility model, the polytetrafluoroethylene sleeve 13 is loaded into the top of the stuffing box 20 from the cavity of the stirring kettle 10, and the shaft 12 passes through the stuffing box 20 from bottom to top. The upper end of the shaft 12 cooperates with the blade assembly 11, and the V-shaped stuffing assembly 21, the water blocking ring 22, and the V-shaped stuffing assembly 21 are loaded into the stuffing box 20 from bottom to top. The V-shaped stuffing assembly 21 is composed of a support ring 211, a V-shaped sealing ring 212 and a pressure ring 210 from bottom to top. The V-shaped stuffing assembly 21 includes a plurality of V-shaped sealing rings 212, so that the ring hole 220 of the water blocking ring 22 is at the same height as the water inlet hole 200 of the stuffing box.

[0054] The first sealing assembly 3 is assembled from top to bottom in the order of an upper seat 30, a spring energy storage seal ring 31, an adjustment pad 32, a positioning ring 33, another adjustment pad 32, another spring energy storage seal ring 31, and a lower seat 34. The shaft sleeve 35 passes through the upper seat 30, two spring energy storage seal rings 31, two adjustment pads 32, the positioning ring 33, and the lower seat 34 of the first sealing assembly 3 until the upper end of the shaft sleeve 35 hits the baffle pad 38 under the packing gland 23. There is a sealing ring 40 between the packing gland 23 and the upper seat body 30, and there are two sealing rings 40 between the upper end of the sleeve 35 and the shaft 12. The single-head bolt 41 passes through the bolt holes 340 and 300 of the lower seat body 34 and the upper seat body 30 and is fastened to the threaded hole 231 of the packing gland 23. At the same time, the single-head bolt 41 fixes the limit card 37 to the lower plane of the lower seat body 34, and inserts the limit card 37 into the outer ring groove at the lower end of the sleeve 35, so that the first sealing assembly 3 becomes a containerized structure.

[0055] The first sealing component 3 is passed over the shaft 12, and the second sealing component 2 is fixed to the flange 201 below the stuffing box 20 by means of the stud 42 and the hexagonal nut 43, so that the upper second sealing component 2 has a certain pre-tightening force but is not completely sealed, and the threaded hole 350 of the sleeve 35 is concentric with the positioning hole 120 of the shaft 12 and the two are fixed by the positioning screw 36, and finally the limit card 37 is pulled out radially for a certain distance, and finally the flushing water is allowed to enter the stuffing box 20 to lubricate the second sealing component 2.

[0056] In the initial state, the material will enter the first sealing component 3 through the second packing sealing component 2, and the first sealing component 3 will seal the material. The first sealing component 3 can achieve complete sealing, and during operation, the spring energy storage sealing ring 31 will continuously compensate after wear, so that the first sealing component 3 has a longer operating cycle. After the life of the spring energy storage sealing ring 31 in the first sealing component 3 is exhausted, the hexagonal nut 43 can be tightened to make the second sealing component 2 work.

[0057] The advantages of the utility model are:

[0058] 1. In the utility model, the first sealing component and the second sealing component play a role successively, and a double-safety sealing mode of inverted vertical stirring can be realized.

[0059] 2. The first sealing component is designed as a containerized structure, which is convenient and quick to disassemble and repair. As the main sealing component, it can achieve leakage-free sealing, does not require frequent tightening of the packing gland, and has a good sealing effect.

[0060] 3.PTFE sleeve can effectively limit the radial runout caused by shaft rotation, reducing the wear of V-shaped packing assembly and spring energy storage seal ring.

[0061] 4. The spring energy storage seal ring has an automatic wear compensation function, which makes the first seal component have a longer service life.

[0062] 5. The water blocking ring evenly distributes the flushing water and lubricates the V-shaped packing assembly, greatly improving the operating life of the second sealing assembly.

[0063] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An inverted vertical stirring sealing structure, characterized in that: It includes: a first sealing assembly and a second sealing assembly, wherein the first sealing assembly is located below the second sealing assembly so that the shaft can pass through the first sealing assembly and the second sealing assembly; The first sealing assembly comprises: an upper seat body, two spring energy storage sealing rings, two adjustment pads, a positioning ring, a lower seat body, a shaft sleeve, and a positioning screw; The second sealing assembly includes: a polytetrafluoroethylene sleeve, a stuffing box, a V-shaped stuffing assembly, a water blocking ring, and a stuffing gland; A water inlet is arranged in the middle of the stuffing box, and a flange is arranged at the bottom; the PTFE sleeve is assembled above the stuffing box and between the shaft and the stuffing box to fix the shaft in the radial direction; the packing gland is arranged below the stuffing box; the V-shaped packing assembly and the water blocking ring are arranged in the stuffing box and sandwiched between the PTFE sleeve and the packing gland; the V-shaped packing assembly is divided into two groups, and a water blocking ring is arranged between the two groups of V-shaped packing assemblies; the water blocking ring has a ring hole and a ring groove, and the ring hole of the water blocking ring is at the same level as the water inlet of the stuffing box; The first sealing assembly is composed of an upper seat body, a spring energy storage type sealing ring, an adjustment pad, a positioning ring, another adjustment pad, another spring energy storage type sealing ring, and a lower seat body from top to bottom; the shaft sleeve passes through the upper seat body, two spring energy storage type sealing rings, two adjustment pads, a positioning ring, and the lower seat body, the upper end of the shaft sleeve is pushed under the packing gland, and a threaded hole is arranged under the shaft sleeve to match the positioning hole under the shaft through a positioning screw, so that the shaft sleeve is fixed on the shaft; The lower seat body and the upper seat body are fixed below the packing gland by bolts; The stuffing box is fixedly connected with the stuffing gland, the upper seat body and the lower seat body through the flange and studs of the stuffing box.

2. The inverted vertical stirring sealing structure according to claim 1, characterized in that: The lower seat body and the upper seat body are provided with bolt holes, and the packing gland is provided with bolt holes and threaded holes; The lower seat body and the upper seat body are fixed to the threaded holes of the packing gland by passing single-head bolts through the bolt holes of the lower seat body and the upper seat body; The studs pass through the flange of the stuffing box, and then through the bolt holes of the stuffing gland, the upper seat body and the lower seat body in sequence, and are matched with nuts to fix the stuffing box, the stuffing gland, the upper seat body and the lower seat body.

3. An inverted vertical stirring sealing structure according to claim 1 or 2, characterized in that: The V-shaped packing assembly is composed of a pressure ring, a V-shaped sealing ring and a support ring from top to bottom, and there are multiple V-shaped sealing rings.

4. An inverted vertical stirring sealing structure according to claim 1 or 2, characterized in that: The first sealing assembly includes a baffle pad, a sealing ring is arranged between the upper outer side of the stuffing cover and the inner side of the lower end of the stuffing box, a gap is formed between the inner side of the stuffing cover and the shaft, the baffle pad is arranged between the lower end surface of the stuffing cover and the upper end surface of the sleeve, a sealing ring is arranged between the lower end surface of the stuffing cover and the upper end surface of the upper seat body, and two sealing rings are arranged between the upper inner side of the sleeve and the shaft.

5. The inverted vertical stirring sealing structure according to claim 4, characterized in that: An annular groove is arranged inside the shaft sleeve to facilitate assembly with the shaft.

6. An inverted vertical stirring sealing structure according to claim 1 or 2, characterized in that: It includes: a shaft and blade assembly; The shaft passes through the first sealing assembly and the second sealing assembly, and a positioning hole is provided below the shaft; The paddle assembly is located in the stirring tank chamber and is used for stirring materials.

7. The inverted vertical stirring sealing structure according to claim 2, characterized in that: The first sealing assembly includes a limit card, the single-head bolt fixes the limit card to the lower plane of the lower seat body, and the limit card is inserted into the outer ring groove of the shaft sleeve.

8. The inverted vertical stirring sealing structure according to claim 7, characterized in that The limit card has a strip hole and can move radially along the single-head bolt.

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