Mechanical seal flushing structure

Abstract

The utility model discloses a mechanical seal flushing structure, which relates to the technical field of pump body maintenance, and comprises a pump body, a plurality of flushing holes are arranged on the outer wall of the pump body, an assembly port is arranged above the flushing holes, a sealing element is arranged in the assembly port, a threaded plug is arranged at the lower end of the sealing element, and the threaded plug is arranged on the outer wall of the pump body. A threaded plug is arranged in the middle of the outer wall of the threaded plug, the threaded plug and the assembling opening are combined and installed through threads, a middle open groove is formed in the middle of the outer wall of the threaded plug, an insertion channel is formed in the middle open groove, a middle sealing block is installed in the middle open groove, and internal threads are arranged on the inner wall of the middle open groove; an external thread matched with the internal thread is arranged on the outer wall of the middle sealing block, and a handle is arranged at the upper end of the middle sealing block. The problems that after a drainage pipe of an existing mechanical seal flushing structure drains water into the interior, impurities are prone to entering a mounting hole, an internal mechanical seal is damaged, and limitation exists are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pump body maintenance, in particular to a mechanical seal flushing structure. Background Art

[0002] The main purpose of mechanical seal flushing is to maintain the normal working condition of the mechanical seal (mechanical seal) and extend its service life. During the operation of the mechanical seal, the medium in the seal chamber may contain particles and impurities. These impurities will be deposited inside the mechanical seal, causing the dynamic and static rings to lose their floatability, spring failure, and even increased friction and wear, ultimately damaging the mechanical seal.

[0003] For example, Publication No. CN220505379U, titled "A Built-in Mechanical Seal Flushing Structure," comprises a pump body, a pump shaft mounted on the pump body, a mechanical seal located outside the pump shaft, a pump cover mounted on the pump body, and a drainage pipe. The pump cover has multiple drainage pipe mounting holes formed in the sidewall. One end of each drainage pipe is connected to the drainage pipe mounting hole, and the other end extends to the outside of the mechanical seal. This device, equipped with three drainage pipes through the pump cover, drains the liquid from the pressure chamber directly to the interface between the dynamic and static rings of the mechanical seal.

[0004] The drainage pipe of the above-mentioned existing mechanical seal flushing structure is installed on the side wall, and water is drained to the inside through the drainage pipe. However, after drainage and flushing, impurities are easily introduced into the installation hole, causing damage to the internal mechanical seal, which has limitations. Therefore, it does not meet the existing needs, and a mechanical seal flushing structure is proposed. Summary of the Invention

[0005] The purpose of the present utility model is to provide a mechanical seal flushing structure to solve the problem that the drainage pipe of the existing mechanical seal flushing structure proposed in the above background technology is installed on the side wall, and the water body is drained to the inside through the drainage pipe. After drainage and flushing, impurities are easily introduced into the installation hole position, causing damage to the internal mechanical seal, which is a limitation.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mechanical seal flushing structure, comprising: a pump body, a plurality of flushing holes are provided on the outer wall of the pump body, an assembly port is provided above the flushing holes, a sealing member is installed inside the assembly port, a threaded plug is provided at the lower end of the seal, and the threaded plug is installed in combination with the assembly port through a thread, a central groove is provided at the middle position of the outer wall of the threaded plug, an insertion channel is provided inside the central groove, and a central sealing block is installed inside the central groove.

[0007] Preferably, an internal thread is provided on the inner wall of the middle groove, an external thread matching the internal thread is provided on the outer wall of the middle sealing block, and a handle is provided on the upper end of the middle sealing block.

[0008] Preferably, a rubber plug is provided at the lower end of the middle sealing block, and the rubber plug is inserted into the insertion channel.

[0009] Preferably, a second sealing ring is installed in the groove on the lower surface of the middle sealing block.

[0010] Preferably, a first sealing ring is installed in the groove on the lower surface of the sealing member.

[0011] Preferably, two grooves are symmetrically provided on the upper surface of the sealing member, and an arc-shaped handle is movably mounted inside the groove via a hinge.

[0012] Preferably, a metal mechanical seal is installed on one side of the flushing hole, and an oil seal is installed on the other side of the flushing hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) In the present invention, the flushing liquid enters the interior from the flushing hole and flushes the metal mechanical seal on one side to prevent the gas medium from accumulating and crystallizing at the static ring end of the mechanical seal, which affects the sealing effect. The assembly port of the flushing hole is sealed by a sealing member, and the sealing member is assembled with the assembly port in a threaded manner through a threaded plug. The middle groove is sealed by a middle sealing block. When inserting the tube, the middle sealing block is opened, and the user can extend the liquid guide tube from the insertion channel to the flushing hole by inserting the tube externally, which is convenient for the user to assemble and use with the tube body. After the tube body is taken out, the middle groove can be sealed again by the middle sealing block, which is convenient for the user to close the channel and protect the internal mechanical seal.

[0015] (2) In the present invention, the middle sealing block is assembled and installed by rotating the external thread and the internal thread of the middle groove. The handle allows the user to easily perform disassembly and assembly operations without the help of external tools. The rubber plug is used to be inserted into the insertion channel to achieve sealing of the insertion channel and improve the sealing effect. The interface between the insertion channel and the middle groove is further sealed by the second sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the assembly structure of the seal and the middle sealing block of the utility model;

[0018] Figure 3 This is a top view of the sealing element of the present invention;

[0019] Figure 4 This is a bottom view of the sealing member of the present invention;

[0020] Figure 5 This is a bottom view of the middle sealing block of the utility model;

[0021] In the figure: 1. Pump body; 2. Flushing hole; 3. Metal mechanical seal; 4. Oil seal; 5. Assembly port; 6. Sealing element; 601. Threaded plug; 602. Groove; 603. Arc-shaped handle; 604. Middle slot; 605. Internal thread; 606. Insertion channel; 607. First sealing ring; 7. Middle sealing block; 701. External thread; 702. Handle; 703. Second sealing ring; 704. Rubber plug. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-Figure 5 The utility model provides an embodiment: a mechanical seal flushing structure, comprising: a pump body 1, a plurality of flushing holes 2 are opened on the outer wall of the pump body 1, a metal mechanical seal 3 is installed on one side of the flushing hole 2, and an oil seal 4 is installed on the other side of the flushing hole 2; the flushing liquid enters the interior from the flushing hole 2 and flushes the metal mechanical seal 3 on one side to prevent the gas medium from accumulating and crystallizing at the static ring end of the mechanical seal, affecting the sealing effect, and the oil seal 4 on the other side is used to seal the flushing water.

[0024] An assembly port 5 is provided above the flushing hole 2, a sealing member 6 is installed inside the assembly port 5, a threaded plug 601 is provided at the lower end of the sealing member 6, and the threaded plug 601 is assembled and installed with the assembly port 5 by means of threads, a central slot 604 is provided at the middle position of the outer wall of the threaded plug 601, an insertion channel 606 is provided inside the central slot 604, and a central sealing block 7 is installed inside the central slot 604;

[0025] The assembly port 5 of the flushing hole 2 is sealed by a sealing member 6, and the sealing member 6 is assembled and installed with the assembly port 5 in a threaded manner through a threaded plug 601. The middle groove 604 is sealed by a middle sealing block 7. When inserting the tube, the middle sealing block 7 is opened, and the user can conveniently extend the drainage tube from the insertion channel 606 to the flushing hole 2 by means of an external insertion tube, which is convenient for the user to assemble and use it with the tube body. After the tube body is taken out, the middle groove 604 can be sealed again by the middle sealing block 7, which is convenient for the user to close the channel and protect the internal mechanical seal.

[0026] Specifically, an internal thread 605 is provided on the inner wall of the middle groove 604, and an external thread 701 matching the internal thread 605 is provided on the outer wall of the middle sealing block 7. A handle 702 is provided at the upper end of the middle sealing block 7, and a rubber plug 704 is provided at the lower end of the middle sealing block 7. The rubber plug 704 is inserted into the insertion channel 606, and a second sealing ring 703 is installed in the groove on the lower surface of the middle sealing block 7; the middle sealing block 7 is assembled and installed in a rotational manner through the external thread 701 and the internal thread 605 of the middle groove 604. The handle 702 allows users to easily perform disassembly and assembly operations without the aid of external tools. The rubber plug 704 is used to be inserted into the insertion channel 606 to achieve sealing of the insertion channel 606 and improve the sealing effect. The second sealing ring 703 is then used to further seal the interface between the insertion channel 606 and the middle groove 604.

[0027] Specifically, a first sealing ring 607 is installed in the groove on the lower surface of the seal 6, and two grooves 602 are symmetrically provided on the upper surface of the seal 6. An arc handle 603 is installed inside the groove 602 through a hinge. The first sealing ring 607 improves the sealing performance between the seal 6 and the assembly port 5, and the placement state of the arc handle 603 can be changed by rotation. When the seal 6 needs to be removed, the two arc handles 603 are rotated into a vertical state, and then the seal 6 is rotated and removed by grasping the arc handle 603, which makes it convenient for users to perform the above operations without the aid of tools.

[0028] The first sealing ring 607 and the second sealing ring 703 are made of rubber, which can effectively improve the internal sealing performance.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A mechanical seal flushing structure, comprising a pump body (1), wherein a plurality of flushing holes (2) are provided on the outer wall of the pump body (1), characterized in that: An assembly opening (5) is provided above the flushing hole (2), a sealing member (6) is installed inside the assembly opening (5), a threaded plug (601) is provided at the lower end of the sealing member (6), and the threaded plug (601) is assembled and installed with the assembly opening (5) through a thread, a central slot (604) is provided at the middle position of the outer wall of the threaded plug (601), an insertion channel (606) is provided inside the central slot (604), and a central sealing block (7) is installed inside the central slot (604).

2. A mechanical seal flushing structure according to claim 1, characterized in that: An internal thread (605) is provided on the inner wall of the middle slot (604), an external thread (701) matching the internal thread (605) is provided on the outer wall of the middle sealing block (7), and a handle (702) is provided at the upper end of the middle sealing block (7).

3. The mechanical seal flushing structure according to claim 1, characterized in that: A rubber plug (704) is provided at the lower end of the middle sealing block (7), and the rubber plug (704) is inserted into the insertion channel (606).

4. The mechanical seal flushing structure according to claim 1, characterized in that: A second sealing ring (703) is installed in the groove on the lower surface of the middle sealing block (7).

5. The mechanical seal flushing structure according to claim 1, characterized in that: A first sealing ring (607) is installed in the groove on the lower surface of the sealing member (6).

6. The mechanical seal flushing structure according to claim 1, characterized in that: Two grooves (602) are symmetrically formed on the upper surface of the sealing member (6), and an arc-shaped handle (603) is movably mounted inside the groove (602) via a hinge.

7. The mechanical seal flushing structure according to claim 1, characterized in that: A metal mechanical seal (3) is installed on one side of the flushing hole (2), and an oil seal (4) is installed on the other side of the flushing hole (2).

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