Mechanical seal anti-splashing device

Abstract

The utility model belongs to the technical field of petrochemical equipment sealing, and provides a mechanical sealing anti-splashing device which comprises a sealing shell, the sealing shell is an annular body and covers a pump set, the sealing shell is formed by splicing a left shell body and a right shell body, a vertical positioning hole is formed in the sealing shell, and the left shell body and the right shell body are arranged in the sealing shell. A positioning bolt is arranged outside the sealing shell and penetrates through the positioning hole to lock the sealing shell on the pump body; the oil guide hole is formed in the side wall of the sealing shell, an oil conveying assembly is arranged on the sealing shell, and the oil conveying assembly is connected into the oil guide hole; by designing the annular sealing shell and the flow guiding device, the problem that leakage oil liquid of a traditional mechanical seal splashes is effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of sealing technology for petrochemical equipment, specifically a mechanical seal anti-splash device. Background Technology

[0002] In petrochemical pump sets, mechanical seals are key components, and their leakage control directly affects production safety and environmental protection. According to JB / T4127.1-2013 "Technical Conditions for Mechanical Seals", when the shaft outer diameter is >50mm, the allowable leakage is ≤20mL / h. However, in actual operation, the following factors cause oil splashing: centrifugal force generated by high-speed rotating shaft (usually 1500-3000rpm); pressure fluctuations inside the sealing cavity (0.2-0.8MPa); and changes in medium viscosity (crude oil viscosity range 50-500cP).

[0003] Therefore, for pump units with sealing structures, common solutions include flow guide channels and oil baffle rings, but these have significant shortcomings: Traditional flow guide channels: The open channel design is prone to secondary splashing under high-speed conditions. Oil baffle ring structure: The unidirectional baffle design cannot achieve full circumferential protection, and the collection efficiency is <60%. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a mechanical seal anti-splash device, which solves the problem of poor sealing effect in traditional sealing structures for pump operation in the prior art.

[0005] A mechanical seal anti-splash device includes a sealing housing, which is an annular design that covers the pump unit. The sealing housing is formed by splicing a left housing and a right housing. The sealing housing has a vertical positioning hole and a positioning bolt on the outside of the sealing housing. The positioning bolt passes through the positioning hole to lock the sealing housing onto the pump body.

[0006] It also includes an oil guide hole, which is formed on the side wall of the sealing housing. The sealing housing is provided with an oil delivery assembly, which is connected to the oil guide hole.

[0007] Preferably, the vertical cross-sectional profile of the sealing housing is convex, the positioning holes are formed on the large-diameter annulus of the sealing housing, and the positioning holes are distributed in a ring on the sealing housing.

[0008] Preferably, the top of the left housing is symmetrically provided with mating plates, the mating plates are fixedly installed at both ends of the semicircle of the left housing, and the mating plates extend toward the right housing. The outer walls of the mating plates are symmetrically fixedly connected with mounting pieces.

[0009] Preferably, the first mounting piece is provided with a locking screw, the second mounting piece is symmetrically provided at the end of the semi-circular side wall of the right housing, the position of the second mounting piece is opposite to that of the first mounting piece, and the left housing and the right housing are provided with rubber sheets on their opposite surfaces.

[0010] Preferably, the oil delivery assembly includes an oil delivery pipe, a locking part, a rubber sealing ring, and a clamping ring. The locking part is fixedly connected to the head of the oil delivery pipe, and the locking part is threadedly engaged with the oil guide hole. The clamping ring is fixedly connected to the outer wall of the oil delivery pipe. The rubber sealing ring is movably sleeved on the oil delivery pipe and is located on the side of the clamping ring near the oil guide hole. After the locking part is engaged with the oil guide hole, one side of the rubber sealing ring is tightly against the outer wall of the sealing housing, and the other side is tightly against the clamping ring.

[0011] Preferably, the outer wall of the other end of the oil pipeline is tapered, and the outer diameter gradually decreases in the direction away from the locking part. Anti-slip rings are provided at intervals on the outer wall of the oil pipeline at the outer tapered position.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention features a sealing shell with a ring-shaped design that can cover the pump unit at the location requiring sealing. The ring-shaped design can effectively reduce oil splashing when leakage occurs, prevent oil from splashing outside, and also collect the leaked oil.

[0014] Furthermore, an oil guide hole is provided on the sealed housing, and an oil delivery component is installed inside the oil guide hole. After oil leaks into the inner wall of the sealed housing, the collected oil can be discharged through the oil guide hole and the oil delivery component, reducing safety hazards and avoiding environmental pollution.

[0015] 2. This utility model designs the sealing housing as two separate housings, a left housing and a right housing, which can be assembled to form a complete annular housing that can cover the pump unit to achieve a seal. Moreover, it is designed to be detachable and locked by locking screws. When it is necessary to inspect the pump unit or clean the inside of the sealing housing, the sealing housing can be disassembled into the left housing and the right housing, which makes disassembly and installation easier and improves the efficiency of installation and disassembly.

[0016] 3. The present invention features an oil delivery assembly with a locking part at the head of the oil delivery pipe. The locking part can fix the oil delivery pipe to the sealing housing. After the oil delivery pipe is installed on the sealing housing, one side of the rubber sealing ring is tightly attached to the outer wall of the sealing housing, and the other side is tightly attached to the pressure ring, thereby sealing the oil guide hole and preventing oil from flowing out between the locking part and the oil guide hole after leakage. This ensures that all the oil in the sealing housing enters the oil delivery pipe. Moreover, the rubber sealing ring is designed to be movable, so that it can be easily replaced when its sealing performance deteriorates. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the component structure of the integral mechanical seal anti-splash device of this utility model;

[0018] Figure 2 This is a schematic diagram of the oil guide hole component on the sealing housing of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the upper component of the left shell of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the upper component of the right shell of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the oil delivery component of this utility model.

[0022] In the picture:

[0023] 1. Sealing housing; 1-1. Left housing; 1-2. Right housing; 2. Positioning hole; 3. Positioning bolt; 4. Oil guide hole; 5. Mating plate; 6. Mounting piece one; 7. Locking screw; 8. Mounting piece two; 9. Rubber sheet; 10. Oil supply pipe; 11. Locking part; 12. Rubber sealing ring; 13. Pressure ring; 14. Anti-slip ring. Detailed Implementation

[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] As attached Figure 1 To be continued Figure 5 As shown:

[0026] Example 1: This utility model provides a mechanical seal anti-splash device, including a sealing shell 1. The sealing shell 1 is an annular design that covers the pump unit. The sealing shell 1 is formed by splicing a left shell 1-1 and a right shell 1-2. The sealing shell 1 is provided with a vertical positioning hole 2. The sealing shell 1 is provided with a positioning bolt 3 on the outside. The positioning bolt 3 passes through the positioning hole 2 to lock the sealing shell 1 onto the pump body.

[0027] It also includes an oil guide hole 4, which is opened on the side wall of the sealing housing 1. The sealing housing 1 is provided with an oil delivery assembly, which is connected to the oil guide hole 4.

[0028] It should be noted that the sealing housing 1 is designed in a ring shape and can cover the part of the pump unit that needs to be sealed. The ring design can effectively reduce the splashing when oil leaks, prevent oil from splashing outside, and also collect the leaked oil.

[0029] Furthermore, an oil guide hole 4 is provided on the sealing housing 1, and an oil conveying component is installed inside the oil guide hole 4. After the oil leaks into the inner wall of the sealing housing 1, the collected oil can be discharged through the oil guide hole 4 and the oil conveying component, reducing safety hazards and avoiding environmental pollution.

[0030] In this embodiment, the vertical cross-sectional profile of the sealing housing 1 is "convex", the positioning hole 2 is opened on the large diameter ring of the sealing housing 1, and the positioning hole 2 is distributed in a ring on the sealing housing 1.

[0031] It should be noted that the inner diameter of the ring at the top of the sealing housing 1 is smaller than the inner diameter of the ring inside the sealing housing 1, so that the sealing housing 1 can be installed on the pump set. The positioning hole 2 is opened on the sealing housing 1, and the position of the positioning hole 2 coincides with the position of the original locking plate bolt hole. Therefore, it is not necessary to open a new hole on the pump set, and the original locking plate can be directly replaced, which shortens the installation time.

[0032] In this embodiment, the top of the left shell 1-1 is symmetrically provided with mating plates 5. The mating plates 5 are fixedly installed at both ends of the semicircle of the left shell 1-1, and the mating plates 5 extend toward the right shell 1-2. The outer walls of the mating plates 5 are symmetrically fixedly connected with mounting pieces 6.

[0033] It should be noted that, through the setting of the left shell 1-1, the mating plate 5 is connected to the top wall and side wall at both ends of the left shell 1-1, and the left shell 1-1 extends towards the right shell 1-2. Thus, after the left shell 1-1 and the right shell 1-2 are mated together, the mating plate 5 can extend to the top and side wall of the right shell 1-2 and fit movably, thereby allowing the left shell 1-1 and the right shell 1-2 to be joined together, reducing the possibility of misalignment after splicing and making subsequent installation easier.

[0034] In this embodiment, mounting plate 6 is provided with locking screws 7, and mounting plate 8 is symmetrically provided at the semi-circular side wall end of the right housing 1-2. The position of mounting plate 8 is opposite to that of mounting plate 6. Rubber sheet 9 is provided on the opposite surface of the left housing 1-1 and the right housing 1-2.

[0035] It should be noted that the sealing housing 1 is designed as two separate units, a left housing 1-1 and a right housing 1-2. After being assembled, they form a complete annular housing that can cover the pump unit to achieve a seal. Moreover, it is designed to be detachable and locked by locking screws 7. This allows the sealing housing 1 to be disassembled into the left housing 1-1 and the right housing 1-2 when the pump unit needs to be inspected or the inside of the sealing housing 1 needs to be cleaned. This makes disassembly and installation easier and improves the efficiency of installation and disassembly.

[0036] Specifically, after installation, the left shell 1-1 is joined with the right shell 1-2, and the rubber sheets 9 on the side walls of the left shell 1-1 and the right shell 1-2 are attached to each other. The mounting piece 1 6 and the mounting piece 2 8 are also attached to each other. The locking screw 7 is tightened with a screwdriver or other tools so that it passes through the mounting piece 2 8. The rubber sheet 9 is deformed by the pressure of the locking screw 7, filling the splicing gap to achieve a seal and fix the two together.

[0037] In this embodiment, the oil delivery assembly includes an oil delivery pipe 10, a locking part 11, a rubber sealing ring 12, and a compression ring 13. The locking part 11 is fixedly connected to the head of the oil delivery pipe 10, and the locking part 11 is threadedly engaged with the oil guide hole 4. The compression ring 13 is fixedly connected to the outer wall of the oil delivery pipe 10. The rubber sealing ring 12 is movably sleeved on the oil delivery pipe 10 and is located on the side of the compression ring 13 near the oil guide hole 4. After the locking part 11 is engaged with the oil guide hole 4, one side of the rubber sealing ring 12 is tightly attached to the outer wall of the sealing housing 1, and the other side is tightly attached to the compression ring 13.

[0038] It should be noted that, through the oil delivery assembly, the head of the oil delivery pipe 10 has a fixedly connected locking part 11. The locking part 11 can fix the oil delivery pipe 10 to the sealing housing 1. After the oil delivery pipe 10 is installed on the sealing housing 1, one side of the rubber sealing ring 12 is tightly attached to the outer wall of the sealing housing 1, and the other side is tightly attached to the compression ring 13, thereby sealing the oil guide hole 4 and preventing oil from flowing out from between the locking part 11 and the oil guide hole 4 after leakage. This allows all the oil in the sealing housing 1 to enter the oil delivery pipe 10. Moreover, the rubber sealing ring 12 is designed to be movable, so that it can be easily replaced when its sealing performance deteriorates.

[0039] In this embodiment, the outer wall of the other end of the oil pipe 10 is tapered, and the outer diameter gradually decreases in the direction away from the locking part 11. Anti-slip rings 14 are provided at intervals on the outer wall of the oil pipe 10 at the outer tapered position.

[0040] It should be noted that the other end of the oil supply pipe 10 is connected to a hose, which can transport the leaked oil in the oil supply pipe 10 into the hose for centralized collection. The other end of the oil supply pipe 10 is set in a conical shape so that it can better connect with the hose. Anti-slip rings 14 are set on the oil supply pipe 10 at intervals, so that after connecting with the hose, the anti-slip rings 14 are also located inside the hose. The anti-slip rings 14 are annular protrusions that are interference-fitted with the inner wall of the hose to prevent them from falling off by increasing friction.

[0041] The embodiments of this utility model are given for the purpose of illustration and description. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A mechanical seal anti-splash device, characterized in that, include: A sealing housing (1) is designed as an annular body that covers the pump unit. The sealing housing (1) is formed by splicing a left housing (1-1) and a right housing (1-2). The sealing housing (1) is provided with a vertical positioning hole (2). The sealing housing (1) is provided with a positioning bolt (3) on the outside. The positioning bolt (3) passes through the positioning hole (2) to lock the sealing housing (1) onto the pump body. It also includes an oil guide hole (4), which is opened on the side wall of the sealing housing (1). The sealing housing (1) is provided with an oil delivery assembly, which is connected to the oil guide hole (4).

2. The mechanical seal anti-splash device as described in claim 1, characterized in that: The vertical cross-sectional profile of the sealing housing (1) is "convex". The positioning hole (2) is opened on the large diameter ring of the sealing housing (1) and the positioning hole (2) is distributed in a ring on the sealing housing (1).

3. The mechanical seal anti-splash device as described in claim 1, characterized in that: The top of the left shell (1-1) is symmetrically provided with mating plates (5). The mating plates (5) are fixedly installed at both ends of the semicircle of the left shell (1-1) and extend towards the right shell (1-2). Mounting pieces (6) are symmetrically fixedly connected to both sides of the outer wall of the mating plates (5).

4. The mechanical seal anti-splash device as described in claim 3, characterized in that: The mounting plate one (6) is provided with a locking screw (7), and the semi-circular side wall end of the right housing (1-2) is symmetrically provided with mounting plate two (8). The position of mounting plate two (8) is opposite to that of mounting plate one (6). The left housing (1-1) and the right housing (1-2) are provided with rubber sheet (9) on their opposite surfaces.

5. The mechanical seal anti-splash device as described in claim 1, characterized in that: The oil delivery assembly includes an oil delivery pipe (10), a locking part (11), a rubber sealing ring (12), and a pressure ring (13). The locking part (11) is fixedly connected to the head of the oil delivery pipe (10). The locking part (11) and the oil guide hole (4) are connected by a thread. The pressure ring (13) is fixedly connected to the outer wall of the oil delivery pipe (10). The rubber sealing ring (12) is movably sleeved on the oil delivery pipe (10) and is located on the side of the pressure ring (13) near the oil guide hole (4). After the locking part (11) and the oil guide hole (4) are engaged, one side of the rubber sealing ring (12) is in close contact with the outer wall of the sealing housing (1), and the other side is in close contact with the pressure ring (13).

6. The mechanical seal anti-splash device as described in claim 5, characterized in that: The outer wall of the other end of the oil pipe (10) is tapered, and the outer diameter gradually decreases in the direction away from the locking part (11). Anti-slip rings (14) are provided on the outer wall of the oil pipe (10) at intervals in the outer conical position.

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