High-temperature-resistant mechanical sealing device of asphalt crushing pump

Abstract

The utility model relates to the related technical field of sealing, in particular to a high-temperature-resistant mechanical sealing device of an asphalt crushing pump. A movable ring is sleeved outside the shaft sleeve; a check ring is installed on the surface of the shaft sleeve on the left side of the movable ring through elastic extrusion of a check block. The check ring is arranged between the check block and the movable ring; the right end of the shaft sleeve is connected with a transmission ring. The transmission ring is connected to the shaft sleeve in a fastened mode through the set screw. Static rings are clamped to the left side and the right side of the transmission ring. The static ring is extruded on the moving ring through the pressing ring; a static ring seat is mounted outside the pressing ring through a first O-shaped ring in a sleeving manner; a spring is mounted between the static ring seat and the moving ring; a small gland is mounted outside the static ring seat through a second O-shaped ring; the right side of the small gland is connected with a large gland through a first screw; according to the high-temperature-resistant mechanical sealing device of the asphalt crushing pump, the service life of the mechanical sealing is prolonged, the working environment is improved, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field related to sealing, and in particular relates to a high-temperature resistant mechanical sealing device for an asphalt crushing pump. Background Art

[0002] The existing mechanical seal is a single-end face type with only one set of dynamic and static rings. The overly simple structure is destined to be unable to use a flushing solution for cooling. In addition, the medium of the asphalt crushing pump is high-viscosity, and there are also high temperatures and easy-to-crystallize asphalt characteristics. The mechanical seal cannot be cooled by the material. The extreme use environment and the overly simple structure greatly shorten the service life of the mechanical seal, which restricts the development of the enterprise and also causes unnecessary losses and waste. Utility Model Content

[0003] The utility model aims to provide a high temperature resistant mechanical seal device for an asphalt crushing pump, which can prolong the service life of the mechanical seal, improve the working environment and reduce the failure rate.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature resistant mechanical sealing device for an asphalt crushing pump, comprising a first screw, a small pressure cap, a stationary ring seat, a first O-ring, a second O-ring, a large pressure cap, a spring, a stationary ring, a dynamic ring, a block, a retaining ring, a fifth O-ring, a sixth O-ring, a sleeve, a second retaining ring, a transmission ring, a second screw, a set screw and a rotating shaft, wherein the diameter of the rotating shaft gradually decreases from right to left; a sleeve is sleeved in the middle of the rotating shaft, and a small pressure cap is sleeved on the left side of the rotating shaft; a fifth O-ring is installed between the inner wall of the sleeve and the outer wall of the rotating shaft; a dynamic ring is sleeved on the outside of the sleeve; and a retaining ring is installed between the inner wall of the dynamic ring and the outer wall of the sleeve. A sixth O-ring is installed; a retaining ring is installed on the surface of the sleeve at the left side of the moving ring through elastic extrusion of a stopper; the retaining ring is arranged between the stopper and the moving ring; a transmission ring is connected to the right end of the sleeve; a fixing screw is installed at an annular interval on the transmission ring; the fixing screw fixes the transmission ring to the sleeve; static rings are clamped on the left and right sides of the transmission ring; the static ring is squeezed on the moving ring through a pressure ring; a static ring seat is installed on the outside of the pressure ring through a first O-ring sleeve; a spring is installed between the static ring seat and the moving ring; a small pressure cap is installed on the outside of the static ring seat through a second O-ring; a large pressure cap is installed on the right side of the small pressure cap through a first screw.

[0005] As a further improvement of the utility model, a pressure plate and a first retaining spring are installed between the small pressure cover and the stationary ring seat; the pressure plate and the first retaining spring are fitted together.

[0006] As a further improvement of the utility model, a fourth O-ring is installed between the inner wall of the large gland and the outer wall of the small gland.

[0007] As a further improvement of the utility model, a third O-ring is embedded and installed on the outer side of the large gland.

[0008] As a further improvement of the utility model, the right end of the large gland is connected to the transmission ring through a limit block; the limit block is fixed to the transmission ring through a second screw.

[0009] As a further improvement of the utility model, a second retaining spring is embedded and installed on the shaft sleeve located on the right side of the transmission ring.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the shaft sleeve of the technical solution is fixed on the rotating shaft, rotates with the rotating shaft, and drives the rotating ring to rotate at the same time. The large pressure cover is connected to the frame part and fixes the static ring at the same time, and provides compensation for the ring through the spring. The friction between the two sets of dynamic rings and static rings is used to prevent medium leakage. Between the sealing surfaces, by applying pressure and temperature, the two dynamic rings and static rings are tightly fitted to form two layers of extremely thin liquid film, thereby preventing the medium from leaking through the sealing surface. When one layer of liquid film is destroyed, the other layer of liquid film can still maintain the sealing effect. At the same time, the friction between the two dynamic rings and static rings can quickly restore the integrity of the liquid film to ensure the sealing effect; the technical solution solves the disadvantage that materials can enter the interior of the mechanical seal, greatly prolongs the life of the mechanical seal, and also improves the working environment for the mechanical seal, greatly reducing the failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a partial schematic diagram of the position between the dynamic ring and the large pressure cover of the utility model.

[0013] In the figure: 1. first screw; 2. small pressure cover; 3. stationary ring seat; 4. first O-ring; 5. second O-ring; 6. large pressure cover; 7. third O-ring; 8. fourth O-ring; 9. first retaining spring; 10. pressure plate; 11. spring; 12. stationary ring; 13. moving ring; 14. block; 15. retaining ring; 16. fifth O-ring; 17. sixth O-ring; 18. bushing; 19. second retaining spring; 20. transmission ring; 21. limit block; 22. second screw; 23. set screw; 24. rotating shaft; 25. pressure ring. DETAILED DESCRIPTION

[0014] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0015] See also Figure 1 to Figure 2 The utility model provides a technical solution: a high temperature resistant mechanical sealing device for an asphalt crushing pump, comprising a first screw 1, a small pressure cap 2, a stationary ring seat 3, a first O-ring 4, a second O-ring 5, a large pressure cap 6, a spring 11, a stationary ring 12, a dynamic ring 13, a stopper 14, a retaining ring 15, a fifth O-ring 16, a sixth O-ring 17, a sleeve 18, a second retaining ring 19, a transmission ring 20, a second screw 22, a set screw 23 and a rotating shaft 24, wherein the diameter of the rotating shaft 24 gradually decreases from right to left; the middle part of the rotating shaft 24 is sleeved with the sleeve 18, and the left side of the rotating shaft 24 is sleeved with the small pressure cap 2; the fifth O-ring 16 is installed between the inner wall of the sleeve 18 and the outer wall of the rotating shaft 24; the outer sleeve of the sleeve 18 is sleeved with the outer sleeve 23; the outer sleeve of the sleeve 18 is sleeved with the outer sleeve 24; the outer sleeve of the sleeve 18 is sleeved with the outer sleeve 23; the inner wall of the sleeve 18 is sleeved with the outer sleeve 23 ... A moving ring 13 is connected; a sixth O-ring 17 is installed between the inner wall of the moving ring 13 and the outer wall of the sleeve 18; a retaining ring 15 is elastically extruded and installed on the surface of the sleeve 18 at the left side of the moving ring 13 through the stopper 14; the retaining ring 15 is arranged between the stopper 14 and the moving ring 13; a transmission ring 20 is connected to the right end of the sleeve 18; fixing screws 23 are installed on the transmission ring 20 at an annular interval; the fixing screws 23 fasten the transmission ring 20 to the sleeve 18; the stationary rings 12 are clamped on the left and right sides of the transmission ring 20; the stationary ring 12 is squeezed on the moving ring 13 through the pressure ring 25; the outside of the pressure ring 25 is sleeved with a stationary ring seat 3 through the first O-ring 4; a spring 11 is installed between the stationary ring seat 3 and the moving ring 13.

[0016] A small gland 2 is installed on the outside of the stationary ring seat 3 through a second O-ring 5; a large gland 6 is installed on the right side of the small gland 2 through a first screw 1. A pressure plate 10 and a first retaining spring 9 are installed between the small gland 2 and the stationary ring seat 3; the pressure plate 10 and the first retaining spring 9 are attached to each other.

[0017] A fourth O-ring 8 is installed between the inner wall of the large pressure cover 6 and the outer wall of the small pressure cover 2; a third O-ring 7 is embedded and installed on the outer side of the large pressure cover 6; the right end of the large pressure cover 6 is connected to the transmission ring 20 through a limit block 21; the limit block 21 is fixed to the transmission ring 20 by a second screw 22; a second retaining ring 19 is embedded and installed on the sleeve 18 located on the right side of the transmission ring 20.

[0018] The existing problems include:

[0019] The problem of high material temperature. In the field of mechanical seals, single-end mechanical seals rely on the material itself for lubrication and cooling. When the material is asphalt, high temperature will greatly shorten the service life of the single-end mechanical seal.

[0020] The problem of high material viscosity. If high-viscosity materials enter the mechanical sealing device, it may cause the spring to fail. When the spring cannot provide a uniform compensation effect on the annular surface, it will cause the dynamic sealing surface to separate and cause leakage.

[0021] The problem of easy crystallization of materials is the most prominent problem of mechanical seals. Crystallization can cause damage to the dynamic sealing surface, spring failure, O-ring failure and other leakage problems. It can also damage metal parts that are not easy to damage. The impact of material crystallization on mechanical seals is comprehensive and fatal. The extremely high maintenance cost and time cost after damage (materials that are easy to crystallize generally need to be continuously heated or stirred or other methods to prevent crystallization, which means that the equipment is difficult to shut down) cause inestimable losses.

[0022] There is a problem of large leakage, but the mechanical seal on the end face is structurally destined to have large leakage. For materials such as asphalt, leakage can easily cause pollution and is difficult to clean.

[0023] The single-end mechanical seal has structural defects. The sealing end face of the single-end mechanical seal is in direct contact with the material, which causes the material that is easy to crystallize to cause damage to the mechanical seal.

[0024] This technical solution is designed as a double-end mechanical seal. It can be applied to asphalt crushing pumps or other working conditions where materials are easy to crystallize, have high viscosity, and high temperature. The outside of this device needs to be connected to a cooling device, and the two end faces of the dynamic and static rings provide sufficient liquid to produce a liquid film to achieve a dynamic sealing effect, and continuously cool the mechanical seal to prevent the material from crystallizing. In addition, the mechanical seal device of this structure is separated from the material, and there is a cavity inside the mechanical seal, which provides a closed cavity for the cooling medium to circulate, solving the problem that the material will enter the inside of the mechanical seal, greatly extending the life of the mechanical seal, and also improving the working environment for the mechanical seal, greatly reducing the failure rate.

[0025] The sealing structure of this technical solution adopts a double-end face structure. The double-end face mechanical seal consists of two independent seals, which are fixed in the sealing cavity outside the pump body. The sealing cavity is filled with a separately supplied sealing liquid. This makes the double-end face seal an ideal sealing method for dangerous liquids, abrasive liquids and corrosive liquids. The sealing end face only contacts with clean lubricants, which greatly increases the service life of the mechanical seal. The good working environment also greatly reduces the failure rate; at the same time, it reduces the leakage of materials, reduces environmental pollution and labor costs.

[0026] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature resistant mechanical seal device for an asphalt crushing pump, characterized in that: The invention comprises a first screw (1), a small pressure cover (2), a stationary ring seat (3), a first O-ring (4), a second O-ring (5), a large pressure cover (6), a spring (11), a stationary ring (12), a moving ring (13), a stopper (14), a retaining ring (15), a fifth O-ring (16), a sixth O-ring (17), a sleeve (18), a second retaining ring (19), a transmission ring (20), a second screw (22), a set screw (23) and a rotating shaft (24), wherein the rotating shaft (24) The diameter gradually decreases from right to left; a sleeve (18) is sleeved on the middle of the rotating shaft (24), and a small pressure cover (2) is sleeved on the left side of the rotating shaft (24); a fifth O-ring (16) is installed between the inner wall of the sleeve (18) and the outer wall of the rotating shaft (24); a moving ring (13) is sleeved on the outside of the sleeve (18); a sixth O-ring (17) is installed between the inner wall of the moving ring (13) and the outer wall of the sleeve (18); ) is elastically pressed and installed with a retaining ring (15) on the surface of the shaft sleeve (18) at the left side thereof through a stopper (14); the retaining ring (15) is arranged between the stopper (14) and the moving ring (13); a transmission ring (20) is connected to the right end of the shaft sleeve (18); fixing screws (23) are installed at annular intervals on the transmission ring (20); the fixing screws (23) fasten the transmission ring (20) to the shaft sleeve (18); the left and right ends of the transmission ring (20) are connected to the shaft sleeve (18); Stationary rings (12) are clamped on both sides; the stationary ring (12) is pressed onto the dynamic ring (13) through a pressure ring (25); a stationary ring seat (3) is sleeved and mounted on the outside of the pressure ring (25) through a first O-ring (4); a spring (11) is mounted between the stationary ring seat (3) and the dynamic ring (13); a small pressure cover (2) is mounted on the outside of the stationary ring seat (3) through a second O-ring (5); and a large pressure cover (6) is connected and mounted on the right side of the small pressure cover (2) through a first screw (1).

2. The high temperature resistant mechanical seal device for an asphalt crushing pump according to claim 1, characterized in that: A pressure plate (10) and a first retaining spring (9) are installed between the small pressure cover (2) and the stationary ring seat (3); the pressure plate (10) and the first retaining spring (9) are fitted together.

3. The high temperature resistant mechanical seal device for an asphalt crushing pump according to claim 1, characterized in that: A fourth O-ring (8) is installed between the inner wall of the large gland (6) and the outer wall of the small gland (2).

4. The high temperature resistant mechanical seal device for an asphalt crushing pump according to claim 1, characterized in that: A third O-ring (7) is embedded and installed on the outer side of the large gland (6).

5. The high temperature resistant mechanical seal device for an asphalt crushing pump according to claim 1, characterized in that: The right end of the large gland (6) is connected to the transmission ring (20) via a limit block (21); the limit block (21) is fixed to the transmission ring (20) via a second screw (22).

6. The high temperature resistant mechanical seal device for an asphalt crushing pump according to claim 1, characterized in that: A second retaining spring (19) is embedded and mounted on the shaft sleeve (18) located on the right side of the transmission ring (20).

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