External semi-packaging single-end-face mechanical seal structure

Abstract

The invention is suitable for the technical field of single-end-face mechanical sealing, and provides an external semi-packaging single-end-face mechanical sealing structure which comprises a pump shaft rod, a sealing ring and a sealing ring. The semi-packaging mounting sleeve plate is mounted and fixed on the peripheral side of the pump shaft rod; the middle sealing mechanism is mounted and connected to the upper end position of the semi-packaging mounting sleeve plate, and the middle sealing mechanism is connected to the peripheral side of the pump shaft rod in a sleeving manner; the cooling shaft sleeve shell is installed and connected to the middle sealing mechanism, the cooling shaft sleeve shell and the middle sealing mechanism are installed and connected through a first assembly screw, and the cooling shaft sleeve shell is connected to the peripheral side of the pump shaft rod in a sleeving mode; the shaft rod cooling mechanism is fixedly installed on the inner side of the cooling shaft sleeve shell and the inner side of the middle sealing mechanism. The technical problems that an external semi-packaging single-end-face mechanical seal structure is prone to sealing leakage in the shaking process, and rubber aging is prone to being caused by overheating of a pump shaft rod are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of single - end mechanical seals, and more specifically, it relates to an external semi - integrated single - end mechanical seal structure. Background Art

[0002] A single - end mechanical seal is a mechanical seal composed of a pair of sealing end faces. It has the characteristics of simple sealing structure, easy manufacturing and installation, and is generally used in situations where the medium itself has good lubricity and a small amount of leakage is allowed. It is the most commonly used type of mechanical seal.

[0003] Currently, the external semi - integrated single - end mechanical seal structure on the market seals through the sealing rubber in each component part. When in use, the pump shaft rod will generate a certain amount of shaking force during rotation, which will cause the shaking of the sealing rubber. During shaking, gaps are likely to appear. Moreover, the pump shaft rod will generate heat during rotation, and the heat of the pump shaft rod will also age the sealing rubber, resulting in the problem that the sealing rubber is not very tight during mechanical sealing.

[0004] Therefore, a new type of external semi - integrated single - end mechanical seal structure is proposed to solve the above - mentioned technical problems. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a solution to the problem of a tight sealing structure for an external semi - integrated single - end mechanical seal structure.

[0006] To solve the above - mentioned technical problems, the present invention is realized through the following technical solutions:

[0007] The present invention is an external semi - integrated single - end mechanical seal structure, including:

[0008] A pump shaft rod;

[0009] A semi - integrated mounting sleeve plate, which is fixedly mounted on the periphery of the pump shaft rod;

[0010] An intermediate sealing mechanism, which is installed and connected to the upper end of the semi - integrated mounting sleeve plate, and the intermediate sealing mechanism is sleeved on the periphery of the pump shaft rod;

[0011] A cooling shaft sleeve housing, which is installed and connected to the intermediate sealing mechanism. The cooling shaft sleeve housing and the intermediate sealing mechanism are installed and connected by first assembly screws, and the cooling shaft sleeve housing is sleeved on the periphery of the pump shaft rod;

[0012] A shaft rod cooling mechanism, which is fixedly installed inside the cooling shaft sleeve housing and the intermediate sealing mechanism, and the shaft rod cooling mechanism is sleeved on the periphery of the pump shaft rod. The shaft rod cooling mechanism is connected to an external circulating cooling equipment pipe;

[0013] Bottom shaft sleeve, the bottom shaft sleeve is installed and fixed on the lower end of the semi-container installation sleeve plate, and the bottom shaft sleeve is sleeved on the peripheral side of the pump shaft;

[0014] First buffer sealing mechanism, the first buffer sealing mechanism is installed and fixed above the inner side of the semi-container installation sleeve plate, and the first buffer sealing mechanism is sleeved on the peripheral side of the pump shaft;

[0015] Second buffer sealing mechanism, the second buffer sealing mechanism is installed and fixed below the inner side of the semi-container installation sleeve plate, and the second buffer sealing mechanism is sleeved on the peripheral side of the bottom shaft sleeve.

[0016] As a preferred technical solution of the external semi-container single-end mechanical seal structure of the present invention, the semi-container installation sleeve plate includes a four-hole installation disc, the lower end of the four-hole installation disc is fixedly connected with a bottom shaft sleeve block, a cooling ring installation groove is opened inside the connection of the four-hole installation disc and the bottom shaft sleeve block, a second sealing mechanism installation groove is opened inside the bottom shaft sleeve block, a first sealing mechanism installation groove is opened on the bottom shaft sleeve block below the second sealing mechanism installation groove, and the four-hole installation disc and the bottom shaft sleeve block are sleeved on the peripheral side of the pump shaft.

[0017] As a preferred technical solution of the external semi-container single-end mechanical seal structure of the present invention, the shaft cooling mechanism includes a hollow cooling ring, the upper ends of both sides of the hollow cooling ring are fixedly connected with circulation connecting pipes, a pipe positioning sleeve is sleeved on the peripheral side of the circulation connecting pipes, an outer positioning ring is fixedly connected to the outer wall of the hollow cooling ring for one week, a bottom sealing rubber is adhesively fixed to the lower end of the hollow cooling ring, the hollow cooling ring and the bottom sealing rubber are sleeved on the peripheral side of the pump shaft, and the hollow cooling ring is installed and connected to the intermediate closing mechanism through the outer positioning ring.

[0018] As a preferred technical solution of the external semi-container single-end mechanical seal structure of the present invention, there are two circulation connecting pipes in total, one is a circulation inlet pipe and the other is a circulation outlet pipe.

[0019] As a preferred technical solution of the external semi-container single-end mechanical seal structure of the present invention, the intermediate closing mechanism includes an intermediate cover plate, third assembly screws are installed on the inner circumference of the intermediate cover plate, a positioning annular groove is opened inside the intermediate cover plate, the intermediate cover plate is sleeved on the peripheral side of the pump shaft, and the intermediate cover plate is installed and connected to the semi-container installation sleeve plate through the third assembly screws.

[0020] As a preferred technical solution of the external semi-containerized single-end mechanical seal structure of the present invention, the bottom shaft rod sleeve includes a bottom sleeve plate, a screw mounting plate is fixedly connected to the upper end of the bottom sleeve plate, a second assembly screw is installed inside the circumference of the screw mounting plate, a rubber mounting ring groove is provided on the peripheral side of the upper end of the screw mounting plate, the screw mounting plate is installed and connected to the semi-containerized mounting sleeve plate through the second assembly screw, and the screw mounting plate and the bottom sleeve plate are sleeved on the peripheral side of the pump shaft rod.

[0021] As a preferred technical solution of the external semi-containerized single-end mechanical seal structure of the present invention, the first buffer seal mechanism includes a second sealing rubber, an outer expansion rubber is sleeved on the outer peripheral side of the second sealing rubber, a second corrugated spring is sleeved on the lower peripheral side of the second sealing rubber, the second sealing rubber and the second corrugated spring are sleeved on the peripheral side of the pump shaft rod, and the second sealing rubber and the second corrugated spring are sleeved on the inner side of the semi-containerized mounting sleeve plate.

[0022] As a preferred technical solution of the external semi-containerized single-end mechanical seal structure of the present invention, the second buffer seal mechanism includes a first sealing rubber, an inner positioning annular rubber is installed on the inner wall of the first sealing rubber for one week, a first corrugated spring is installed at the lower end of the first sealing rubber, the first sealing rubber is sleeved on the upper peripheral side of the bottom shaft rod sleeve through the inner positioning annular rubber, and the first corrugated spring is sleeved on the upper peripheral side of the bottom shaft rod sleeve.

[0023] As a preferred technical solution of the external semi-containerized single-end mechanical seal structure of the present invention, the pipeline positioning sleeve is installed and connected to the cooling shaft sleeve housing through screws.

[0024] As a preferred technical solution of the external semi-containerized single-end mechanical seal structure of the present invention, the pump shaft rod is centered on the axis and is symmetric at both ends.

[0025] The advantages of the present invention are:

[0026] 1. Through the first corrugated spring at the bottom of the first sealing rubber of the first buffer seal mechanism of the present invention, it has good elastic buffering performance, effectively avoids the shaking of the first sealing rubber, and thus is more tightly sealed on the peripheral side of the pump shaft rod.

[0027] 2. The second buffer seal mechanism of the present invention is installed and fixed under the inner side of the semi-containerized mounting sleeve plate, and the second buffer seal mechanism is sleeved on the peripheral side of the bottom shaft rod sleeve. Therefore, when the bottom shaft rod sleeve and the semi-containerized mounting sleeve plate are assembled, the second sealing rubber of the second buffer seal mechanism plays an elastic buffering role through the second corrugated spring, making the bottom shaft rod sleeve and the semi-containerized mounting sleeve plate more tightly assembled.

[0028] 3. The present invention has a shaft rod cooling mechanism structure, which plays a role in cooling and temperature reduction. The circulating connecting pipe of the shaft rod cooling mechanism can receive external cooling water source and transport it to the hollow cooling ring. A pipe positioning sleeve is sleeved on the circumferential side of the circulating connecting pipe. The circulating connecting pipe can be positioned and placed through the pipe positioning sleeve. An outer positioning ring is fixedly connected to the outer wall of the hollow cooling ring for one week. The hollow cooling ring is installed and connected to the middle closing mechanism through the outer positioning ring, so that the hollow cooling ring can be positioned and installed. A bottom sealing rubber is adhesively fixed to the lower end of the hollow cooling ring. Through the bottom sealing rubber at the lower end, the rubber sealing effect can be achieved. The hollow cooling ring and the bottom sealing rubber are sleeved on the circumferential side of the pump shaft rod, so that they can be positioned and placed. The hollow cooling ring can absorb the heat of the pump shaft rod through the internal cooling liquid, thereby reducing the heat of the pump shaft rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. is a schematic structural diagram of an external semi-containerized single-end mechanical seal structure of the present invention.

[0030] Figure 2 FIG. is a schematic structural diagram of a cross-section of the present invention.

[0031] Figure 3 FIG. is a schematic structural diagram of the bottom shaft rod sleeve of the present invention.

[0032] Figure 4 FIG. is a schematic structural diagram of the first buffer sealing mechanism of the present invention.

[0033] Figure 5 FIG. is a schematic structural diagram of an upper cross-section of the present invention.

[0034] Figure 6 FIG. is a schematic structural diagram of the shaft rod cooling mechanism of the present invention.

[0035] Figure 7 FIG. is a schematic structural diagram of the second buffer sealing mechanism of the present invention.

[0036] Figure 8 FIG. is a schematic structural diagram of an external semi-containerized installation sleeve plate.

[0037] In the attached drawings: 1. Pump shaft rod; 2. Bottom sleeve disc; 21. Screw mounting disc; 22. Second assembly screw; 23. Rubber mounting ring groove; 3. Cooling shaft sleeve housing; 31. First assembly screw; 4. Four-hole mounting disc; 41. Bottom shaft rod sleeve block; 42. Cooling ring mounting groove; 43. Second sealing mechanism mounting groove; 44. First sealing mechanism mounting groove; 5. Intermediate cover plate; 51. Third assembly screw; 52. Positioning annular groove; 6. Circulation connecting pipe; 61. Bottom sealing rubber; 62. Outer positioning ring; 63. Hollow cooling ring; 64. Pipe positioning sleeve; 7. First sealing rubber; 71. Inner positioning annular rubber; 72. First wave spring; 8. Second sealing rubber; 81. Outer expansion rubber; 82. Second wave spring. Detailed implementation mode

[0038] The principles and features of the present invention will be described below with reference to the attached drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the attached drawings. It should be noted that the attached drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0039] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] Embodiment 1:

[0042] Please refer to Figures 1 - 8 the structural schematic diagram, and the present invention provides the following technical solutions:

[0043] Specifically, it refers to an external semi-containerized single-end mechanical seal structure, including a pump shaft rod 1, a semi-containerized mounting sleeve plate, an intermediate closing mechanism, a cooling shaft sleeve housing 3, a shaft rod cooling mechanism, a bottom shaft rod sleeve, a first buffer sealing mechanism, and a second buffer sealing mechanism.

[0044] The semi-container installation sleeve plate is installed and fixed on the peripheral side of the pump shaft rod 1. The pump shaft rod 1 can be positioned and rotated in the semi-container installation sleeve plate. The semi-container installation sleeve plate can be externally installed and connected to the external pump body. The intermediate sealing mechanism is installed and connected to the upper end position of the semi-container installation sleeve plate. The intermediate sealing mechanism is sleeved on the peripheral side of the pump shaft rod 1. The intermediate sealing mechanism can be stably sealed on the semi-container installation sleeve plate and effectively limit the pump shaft rod 1. The cooling shaft sleeve housing 3 is installed and connected to the intermediate sealing mechanism. The cooling shaft sleeve housing 3 and the intermediate sealing mechanism are installed and connected through the first assembly screw 31. The cooling shaft sleeve housing 3 can be correspondingly installed and connected through the first assembly screw 31. The cooling shaft sleeve housing 3 is sleeved on the peripheral side of the pump shaft rod 1 to achieve effective limiting. The shaft rod cooling mechanism is installed and fixed inside the cooling shaft sleeve housing 3 and the intermediate sealing mechanism. The shaft rod cooling mechanism can be effectively wrapped and limited by the cooling shaft sleeve housing 3 and the intermediate sealing mechanism for placement. The shaft rod cooling mechanism is sleeved on the peripheral side of the pump shaft rod 1. The shaft rod cooling mechanism can absorb heat on the peripheral side of the pump shaft rod 1, thereby reducing the rotation temperature of the pump shaft rod 1 and effectively avoiding rubber aging and wear caused by overheating of the pump shaft rod 1. The shaft rod cooling mechanism is connected to the external circulating cooling equipment pipe, so that the cooling water source can be circulated and transported for cooling. The bottom shaft rod sleeve is installed and fixed on the lower end of the semi-container installation sleeve plate and can be effectively correspondingly installed and connected. The bottom shaft rod sleeve is sleeved on the peripheral side of the pump shaft rod 1 to enable effective limiting. The first buffer sealing mechanism is installed and fixed above the inner side of the semi-container installation sleeve plate. The first buffer sealing mechanism is sleeved on the peripheral side of the pump shaft rod 1. The first buffer sealing mechanism can be sealed in the semi-container installation sleeve plate. The second buffer sealing mechanism is installed and fixed below the inner side of the semi-container installation sleeve plate. The second buffer sealing mechanism is sleeved on the peripheral side of the bottom shaft rod sleeve, so as to effectively seal the bottom connection and make the assembly more compact.

[0045] Taking the pump shaft rod 1 as the axis center and with both ends in a symmetrical state, the pump shaft rod 1 can be stably positioned and rotated.

[0046] The semi-container installation sleeve plate includes a four-hole installation disc 4. The four-hole installation disc 4 can be placed on the external pump body through four screw holes for installation by screws. The lower end of the four-hole installation disc 4 is fixedly connected with a bottom shaft rod sleeve block 41. The four-hole installation disc 4 and the bottom shaft rod sleeve block 41 are sleeved on the peripheral side of the pump shaft rod 1. Thus, the pump shaft rod 1 can be positioned and rotated in the four-hole installation disc 4 and the bottom shaft rod sleeve block 41. An inner side of the connection between the four-hole installation disc 4 and the bottom shaft rod sleeve block 41 is provided with a cooling ring installation groove 42, so that the shaft rod cooling mechanism can be correspondingly installed and placed. The inside of the bottom shaft rod sleeve block 41 is provided with a second sealing mechanism installation groove 43, so that the second buffer sealing mechanism can be correspondingly installed. Below the second sealing mechanism installation groove 43, a first sealing mechanism installation groove 44 is provided on the bottom shaft rod sleeve block 41, so that the first buffer sealing mechanism can be correspondingly installed.

[0047] The first buffer sealing mechanism includes a second sealing rubber 8. Due to the elasticity and plasticity of the rubber, the second sealing rubber 8 can effectively deform under pressure, thereby achieving effective deformation sealing. An outer expansion rubber 81 is sleeved on the outer peripheral side of the outer end of the second sealing rubber 8. The outer expansion rubber 81 has expansibility, enabling the outer expansion rubber 81 to effectively position the second sealing rubber 8 for placement, making the second sealing rubber 8 more stable during deformation sealing. A second corrugated spring 82 is sleeved on the lower peripheral side of the second sealing rubber 8. The second corrugated spring 82 has elastic buffering force, so that the second corrugated spring 82 can effectively buffer the shaking force of the second sealing rubber 8, avoiding the generation of sealing gaps caused by the shaking of the second sealing rubber 8. The second sealing rubber 8 and the second corrugated spring 82 are sleeved on the peripheral side of the pump shaft rod 1, enabling corresponding installation and placement. The second sealing rubber 8 and the second corrugated spring 82 are sleeved on the inner side of the semi-container installation sleeve plate, allowing for corresponding installation and connection.

[0048] Working principle: During use, the semi-container installation sleeve plate can be externally installed and connected to an external pump body through the four-hole mounting plate 4 by screws. The shaft rod cooling mechanism can be effectively wrapped and limited by the cooling shaft sleeve housing 3 and the intermediate sealing mechanism for placement. The shaft rod cooling mechanism is sleeved on the peripheral side of the pump shaft rod 1, and the shaft rod cooling mechanism can absorb heat on the peripheral side of the pump shaft rod 1, thereby reducing the rotation temperature of the pump shaft rod 1, effectively avoiding the rubber aging of the second buffer sealing mechanism and the first buffer sealing mechanism caused by overheating of the pump shaft rod 1, and effectively avoiding rubber seal leakage caused by aging. The bottom shaft rod sleeve is sleeved on the peripheral side of the pump shaft rod 1, enabling effective limitation. The first buffer sealing mechanism can be sealed in the semi-container installation sleeve plate. The first sealing rubber 7 of the first buffer sealing mechanism has good elastic buffering through the first corrugated spring 72 at the bottom, effectively avoiding the shaking of the first sealing rubber 7, and thus being more tightly sealed during sealing. The second buffer sealing mechanism is installed and fixed below the inner side of the semi-container installation sleeve plate. The second buffer sealing mechanism is sleeved on the peripheral side of the bottom shaft rod sleeve. Therefore, when the bottom shaft rod sleeve and the semi-container installation sleeve plate are assembled, the second sealing rubber 8 of the second buffer sealing mechanism exhibits elastic buffering through the second corrugated spring 82, making the assembly of the bottom shaft rod sleeve and the semi-container installation sleeve plate more tight.

[0049] Embodiment 2:

[0050] Based on the specific Embodiment 1, the difference in this embodiment is:

[0051] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 8As shown in the figure, the second buffer sealing mechanism includes a first sealing rubber 7. Due to the elasticity and plasticity of the rubber, the first sealing rubber 7 can effectively deform under pressure, thus achieving effective deformation sealing. An inner positioning annular rubber 71 is installed on the inner wall of the first sealing rubber 7 for one week, which plays an assembly positioning role. The first sealing rubber 7 is sleeved on the upper peripheral side of the bottom shaft sleeve through the inner positioning annular rubber 71, so that it can be stably installed and placed. A first corrugated spring 72 is installed at the lower end of the first sealing rubber 7. The first corrugated spring 72 has elastic buffering force, and the first corrugated spring 72 can effectively buffer the shaking force of the first sealing rubber 7, avoiding seal leakage caused by assembly shaking. The first corrugated spring 72 is sleeved on the upper peripheral side of the bottom shaft sleeve, so that it can be correspondingly installed.

[0052] The bottom shaft sleeve includes a bottom sleeve plate 2. A screw mounting plate 21 is fixedly connected to the upper end of the bottom sleeve plate 2. A second assembly screw 22 is installed on the inner circumference of the screw mounting plate 21. The screw mounting plate 21 is installed and connected to the semi-container mounting sleeve plate through the second assembly screw 22, so that the screw mounting plate 21 and the semi-container mounting sleeve plate can be correspondingly installed and connected. A rubber mounting ring groove 23 is provided on the upper peripheral side of the screw mounting plate 21, and the second buffer sealing mechanism can be correspondingly installed and connected. Through the second buffer sealing mechanism, a buffering effect is achieved, avoiding seal leakage caused by shaking. The screw mounting plate 21 and the bottom sleeve plate 2 are sleeved on the peripheral side of the pump shaft rod 1, so that the pump shaft rod 1 can be effectively positioned and rotated.

[0053] Embodiment 3:

[0054] Based on the specific Embodiment 2, the difference in this embodiment is as follows:

[0055] As Figure 1 、 Figure 2 、 Figure 5 and Figure 6 shown in the figure, the shaft rod cooling mechanism includes a hollow cooling ring 63. Two sides of the upper end of the hollow cooling ring 63 are fixedly connected with a circulation connecting pipe 6. The circulation connecting pipe 6 can receive external cooling water source and transport it into the hollow cooling ring 63. A pipe positioning sleeve 64 is sleeved on the peripheral side of the circulation connecting pipe 6. The circulation connecting pipe 6 can be positioned and placed through the pipe positioning sleeve 64. An outer positioning ring 62 is fixedly connected to the outer wall of the hollow cooling ring 63 for one week. The hollow cooling ring 63 is installed and connected to the middle closing mechanism through the outer positioning ring 62, so that the hollow cooling ring 63 can be positioned and installed. A bottom sealing rubber 61 is adhesively fixed to the lower end of the hollow cooling ring 63. Through the bottom sealing rubber 61 at the lower end of the hollow cooling ring 63, a rubber sealing effect is achieved. The hollow cooling ring 63 and the bottom sealing rubber 61 are sleeved on the peripheral side of the pump shaft rod 1, so that they can be positioned and placed. The hollow cooling ring 63 can absorb the heat of the pump shaft rod 1 through the internal cooling liquid, thereby reducing the heat of the pump shaft rod 1;

[0056] The pipeline positioning sleeve 64 is installed and connected to the cooling shaft sleeve housing 3 by screws, so that it can be positioned and installed.

[0057] There are two circulating connecting pipes 6 in total. One is a circulating water inlet pipe, and the other is a circulating water outlet pipe. Thus, the circulating connecting pipe 6 can circulate and transport the cooling liquid into the hollow cooling ring 63.

[0058] The middle closing mechanism includes a middle cover plate 5. The inner circumference of the middle cover plate 5 is installed with third assembly screws 51. The middle cover plate 5 is installed and connected to the semi-container installation sleeve plate by the third assembly screws 51, so that it can be correspondingly installed and connected. A positioning annular groove 52 is opened inside the middle cover plate 5, so that the outer positioning ring 62 on the circumference side of the hollow cooling ring 63 can be positioned and placed. The middle cover plate 5 is sleeved on the circumference side of the pump shaft rod 1, so that it plays a limiting role.

[0059] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the present invention.

Claims

1. An external semi-container single-end mechanical seal structure, characterized in that Comprising: Pump shaft rod (1); Semi-containerized mounting sleeve plate, which is mounted and fixed on the peripheral side of the pump shaft rod (1); Intermediate sealing mechanism, which is mounted and connected to the upper end position of the semi-containerized mounting sleeve plate, and the intermediate sealing mechanism is sleeved on the peripheral side of the pump shaft rod (1); Cooling shaft sleeve housing (3), which is mounted and connected to the intermediate sealing mechanism, and the cooling shaft sleeve housing (3) and the intermediate sealing mechanism are mounted and connected by the first assembly screw (31), and the cooling shaft sleeve housing (3) is sleeved on the peripheral side of the pump shaft rod (1); Shaft rod cooling mechanism, which is mounted and fixed inside the cooling shaft sleeve housing (3) and the intermediate sealing mechanism, and the shaft rod cooling mechanism is sleeved on the peripheral side of the pump shaft rod (1), and the shaft rod cooling mechanism is connected to an external circulating cooling equipment pipe; Bottom shaft rod sleeve, which is mounted and fixed on the lower end of the semi-containerized mounting sleeve plate, and the bottom shaft rod sleeve is sleeved on the peripheral side of the pump shaft rod (1); First buffer sealing mechanism, which is mounted and fixed above the inner side of the semi-containerized mounting sleeve plate, and the first buffer sealing mechanism is sleeved on the peripheral side of the pump shaft rod (1); Second buffer sealing mechanism, which is mounted and fixed below the inner side of the semi-containerized mounting sleeve plate, and the second buffer sealing mechanism is sleeved on the peripheral side of the bottom shaft rod sleeve.

2. The external semi-container single-end mechanical seal structure according to claim 1, wherein The semi-containerized mounting sleeve plate includes a four-hole mounting disc (4), the lower end of the four-hole mounting disc (4) is fixedly connected with a bottom shaft rod sleeve block (41), a cooling ring mounting groove (42) is opened on the inner side of the connection between the four-hole mounting disc (4) and the bottom shaft rod sleeve block (41), a second sealing mechanism mounting groove (43) is opened inside the bottom shaft rod sleeve block (41), a first sealing mechanism mounting groove (44) is opened on the bottom shaft rod sleeve block (41) below the second sealing mechanism mounting groove (43), and the four-hole mounting disc (4) and the bottom shaft rod sleeve block (41) are sleeved on the peripheral side of the pump shaft rod (1).

3. An external semi-container single-end mechanical seal structure according to claim 1, characterized in that, The shaft rod cooling mechanism includes a hollow cooling ring (63), two sides of the upper end of the hollow cooling ring (63) are fixedly connected with circulating connection pipes (6), a pipe positioning sleeve (64) is sleeved on the peripheral side of the circulating connection pipes (6), an outer positioning ring (62) is fixedly connected around the outer wall of the hollow cooling ring (63), a bottom sealing rubber (61) is adhesively fixed to the lower end of the hollow cooling ring (63), the hollow cooling ring (63) and the bottom sealing rubber (61) are sleeved on the peripheral side of the pump shaft rod (1), and the hollow cooling ring (63) is mounted and connected to the intermediate sealing mechanism through the outer positioning ring (62).

4. An external semi-container single-end mechanical seal structure according to claim 3, characterized in that, There are two circulating connection pipes (6) in total, one is a circulating water inlet pipe and the other is a circulating water outlet pipe.

5. The external semi-container single-end mechanical seal structure according to claim 3, characterized in that, The intermediate closing mechanism includes an intermediate cover plate (5). A third assembly screw (51) is installed on the inner circumference of the intermediate cover plate (5). A positioning annular groove (52) is formed inside the intermediate cover plate (5). The intermediate cover plate (5) is sleeved on the peripheral side of the pump shaft rod (1). The intermediate cover plate (5) is installed and connected to the semi-containerized installation sleeve plate by the third assembly screw (51).

6. The external semi-container single-end mechanical seal structure according to claim 1, characterized in that, The bottom shaft rod sleeve includes a bottom sleeve disc (2). A screw installation disc (21) is fixedly connected to the upper end of the bottom sleeve disc (2). A second assembly screw (22) is installed on the inner circumference of the screw installation disc (21). A rubber installation ring groove (23) is formed on the peripheral side of the upper end of the screw installation disc (21). The screw installation disc (21) is installed and connected to the semi-containerized installation sleeve plate by the second assembly screw (22). The screw installation disc (21) and the bottom sleeve disc (2) are sleeved on the peripheral side of the pump shaft rod (1).

7. The external semi-container single-end mechanical seal structure according to claim 1, characterized in that, The first buffer sealing mechanism includes a second sealing rubber (8). An outer expansion rubber (81) is sleeved on the outer peripheral side of the second sealing rubber (8). A second corrugated spring (82) is sleeved on the lower peripheral side of the second sealing rubber (8). The second sealing rubber (8) and the second corrugated spring (82) are sleeved on the peripheral side of the pump shaft rod (1). The second sealing rubber (8) and the second corrugated spring (82) are sleeved on the inner side of the semi-containerized installation sleeve plate.

8. An external semi-container single-end mechanical seal structure according to claim 1, characterized in that, The second buffer sealing mechanism includes a first sealing rubber (7). An inner positioning annular rubber (71) is installed on the inner wall of the first sealing rubber (7). A first corrugated spring (72) is installed at the lower end of the first sealing rubber (7). The first sealing rubber (7) is sleeved on the upper peripheral side of the bottom shaft rod sleeve through the inner positioning annular rubber (71). The first corrugated spring (72) is sleeved on the upper peripheral side of the bottom shaft rod sleeve.

9. The external semi-container single-end mechanical seal structure according to claim 3, characterized in that, The pipeline positioning sleeve (64) is installed and connected to the cooling shaft sleeve housing (3) by screws.

10. The external semi-container single-end mechanical seal structure according to claim 1, characterized in that, The pump shaft rod (1) is centered on the axis and is symmetric at both ends.

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