A protection device for preventing environmental accidents caused by leakage of a three-effect pump

Abstract

The utility model discloses a kind of protective devices for preventing three-effect pump machine inner leakage from causing environmental protection accident, belong to chemical equipment sealing technical field.The device includes: static ring, fixed in pump body;Push ring, it is set to pump shaft outside, moving ring, slidingly arranged in the inside of push ring and with static ring, positioning ring, fixed on pump shaft, corrugated sleeve, one end is fixedly connected with the outer wall of positioning ring, the other end is fixedly connected with the outer wall of push ring.Optimally, spring is arranged in corrugated sleeve, the spring is abutted between push ring and positioning ring.Further, disc spring group and rubber pad are arranged in the inner cavity of static ring, to provide two-stage compensation.The utility model solves the problem of radial swing by the rigid constraint of positioning ring and corrugated sleeve, the spring is isolated and protected by corrugated sleeve, and by the double compensation of spring and disc spring group, the beneficial effects of high reliability, long life and automatic compensation wear are realized.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for chemical equipment, and in particular to a protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump. Background Technology

[0002] Triple-effect pumps, as key fluid transport equipment in triple-effect evaporation systems, often operate under harsh conditions. The media they transport are typically corrosive, at high temperatures, and sometimes even contain tiny crystalline particles. To prevent these media from leaking into the environment and causing environmental accidents, triple-effect pumps must be equipped with high-performance mechanical seals.

[0003] Existing mechanical seal devices typically rely on the contact between a rotating ring that rotates with the pump shaft and a stationary ring fixed to the pump body, with axial pressure provided by compensating elements such as springs to maintain the seal. However, in actual operation, the pump shaft of a triple-effect pump often experiences radial wobble and axial movement due to uneven stress, vibration, or manufacturing and installation errors. This dynamic instability poses a serious challenge to traditional sealing devices.

[0004] When the pump shaft experiences radial wobble, the existing sealing structure lacks effective radial restraint, causing the rotation center of the rotating ring to deviate from the center of the stationary ring. This results in inaccurate alignment of the dynamic and stationary sealing surfaces, leading to gapping or uneven wear and a sharp decline in sealing performance. Simultaneously, the axial movement and vibration of the pump shaft directly impact compensating components such as springs. Furthermore, the intrusion of corrosive media or the accumulation of crystals can easily cause spring corrosion, jamming, or even failure, preventing them from providing a stable and continuous axial compensating force to press the sealing surface tightly. Once the dynamic and stationary sealing surfaces fail to maintain a tight seal, the media inside the pump will leak, causing serious safety hazards and environmental accidents.

[0005] Therefore, this utility model proposes a protective device to prevent environmental accidents caused by internal leakage of a triple-effect pump, in order to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing technology of mechanical seal devices for pumps, such as insufficient radial restraint leading to misalignment of the sealing surface and susceptibility of the axial compensation mechanism to failure due to the influence of the medium, which in turn cause internal leakage of the medium and environmental accidents, this utility model aims to provide a protective device with an improved structure that can effectively solve the above problems and prevent environmental accidents caused by internal leakage of triple-effect pumps.

[0007] This utility model provides a protective device to prevent environmental accidents caused by internal leakage of a triple-effect pump, comprising: a pump body, a pump shaft rotatably inserted into the pump body, a stationary ring, a push ring, a moving ring, a positioning ring, and a corrugated sleeve.

[0008] The stationary ring is fixedly installed on the pump body, the push ring is sleeved on the outside of the pump shaft, and the moving ring is slidably disposed on the inner side of the push ring and fits against the end face of the stationary ring to form a dynamic and static sealing surface.

[0009] The core innovative structure of this device lies in the fact that the positioning ring is fixed to the pump shaft by fasteners, one end of the bellows is fixedly connected to the outer wall of the positioning ring, and the other end is fixedly connected to the outer wall of the push ring. This structural combination provides a rigid radial constraint reference through the positioning ring fixed to the pump shaft, and transmits this constraint to the push ring and the moving ring through the bellows. At the same time, the flexible structure of the bellows isolates and protects the internal compensation elements.

[0010] Preferably, the protective device further includes a spring, which is sleeved on one side of the protruding section of the push ring, with one end abutting against the outer wall of the push ring and the other end abutting against the outer wall of the positioning ring, and the spring is completely wrapped by the corrugated sleeve.

[0011] Preferably, the protective device further includes a sealing ring, which is embedded between the moving ring and the pump shaft.

[0012] Preferably, the protective device further includes a sealing ring, which is embedded between the push ring and the pump shaft.

[0013] Preferably, the protective device further includes a sealing ring, which is embedded between the stationary ring and the pump body.

[0014] Preferably, a disc spring assembly is provided in the inner cavity of the stationary ring.

[0015] Preferably, the protective device further includes a rubber pad that is slidably disposed within the stationary ring along the axial direction, and the rubber pad is located between the disc spring assembly and the sealing ring.

[0016] Preferably, one end of the disc spring assembly abuts against the inner wall of the stationary ring, and the other end abuts against the sealing ring via the rubber pad.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by setting a positioning ring fixed to the pump shaft and connecting the positioning ring and the push ring through a corrugated sleeve, the problem of leakage caused by misalignment or eccentric wear of the sealing surfaces of the dynamic and static rings due to radial shaking of the pump shaft is solved. This achieves the technical effect of forcibly ensuring that the dynamic and static sealing surfaces are always precisely aligned, greatly improving the reliability of the sealing device under dynamic shaking conditions.

[0018] 2. In this utility model, by using a corrugated sleeve to wrap the spring and fix it to both ends of the push ring and the positioning ring, the elastic deformation of the corrugated sleeve itself solves the problems in the prior art where the compensation spring is easily corroded by the pump medium or stuck by impurity particles and fails, and the axial movement of the pump shaft easily impacts the spring, resulting in unstable compensation force. It achieves the technical effect of effectively isolating and protecting the spring, and can buffer and absorb axial vibration and movement, ensuring long-term stable and reliable axial compensation force. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump, as proposed in this utility model. Figure 2 A cross-sectional view of the stationary ring of a protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump, as proposed in this utility model. Figure 3 A cross-sectional view of the corrugated sleeve of a protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump, as proposed in this utility model. Figure 4 This is a schematic diagram of the sealing ring structure of a protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump, as proposed in this utility model. Legend: 1. Stationary ring; 2. Sealing ring; 3. Rubber gasket; 4. Disc spring assembly; 5. Sealing ring; 6. Moving ring; 7. Push ring; 8. Spring; 9. Corrugated sleeve; 10. Positioning ring; 11. Sealing ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in 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 a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example 1

[0021] Please refer to Figures 1 to 4 This utility model provides a protective device to prevent environmental accidents caused by internal leakage of a triple-effect pump. It aims to solve the problem that in the prior art, the mechanical seal of the pump has insufficient radial restraint and the axial compensation mechanism is easily affected by the medium and fails, resulting in leakage of the sealing surface.

[0022] like Figure 1As shown, the protective device is applied to a pump device that includes a pump body and a pump shaft rotatably inserted into the pump body. The device includes a fixed component and a rotating component that rotates with the pump shaft. The fixed component is mainly a stationary ring 1, which is fixedly installed on the pump body. The rotating component is sleeved on the outside of the pump shaft and fits against the end face of the stationary ring 1 to form a dynamic and static sealing surface. The core innovation of the rotating component is that it includes a positioning ring 10, a corrugated sleeve 9, a push ring 7, and a moving ring 6.

[0023] Specifically, the positioning ring 10 is fixed to the pump shaft by fasteners to provide a radial reference. The push ring 7 is sleeved on the outside of the pump shaft. The moving ring 6 is slidably disposed inside the push ring 7. The end face of the moving ring 6 facing the stationary ring 1 is tightly fitted with the end face of the stationary ring 1, forming the core dynamic sealing pair of the device. The corrugated sleeve 9 is a flexible tubular component with openings at both ends. The outer wall of one end is fixedly connected to the outer wall of the positioning ring 10, and the outer wall of the other end is fixedly connected to the outer wall of the push ring 7, thereby connecting the positioning ring 10 and the push ring 7.

[0024] In this structure, the positioning ring 10 serves as the core of radial constraint. Its fixed connection with the pump shaft ensures that the entire rotating assembly can move synchronously when the pump shaft experiences radial sway. This forces the rotation center lines of the push ring 7 and the moving ring 6 to remain aligned with the center line of the stationary ring 1, avoiding poor contact or abnormal wear of the sealing surface due to eccentricity. The bellows sleeve 9 plays a dual role. Its structure gives it elastic expansion and contraction capabilities in the axial direction, which can absorb the axial movement and vibration of the pump shaft. At the same time, it exhibits rigidity in the radial direction due to its fixed connection with the positioning ring 10 and the push ring 7, which can reliably transmit the radial constraint effect of the positioning ring 10. The push ring 7, as a force transmission and support component, is constrained in the radial position by the bellows sleeve 9 and the positioning ring 10, while its interior provides sliding guidance for the moving ring 6.

[0025] To provide continuous axial compensation force to ensure a tight fit between the moving ring 6 and the stationary ring 1, a spring 8 is also provided inside the rotating assembly of the protective device. The spring 8 is completely wrapped by the corrugated sleeve 9 and forms a precise force transmission and positioning relationship with the push ring 7 and the positioning ring 10.

[0026] Please refer to the following carefully. Figure 1 Spring 8 is a helical compression spring, which is sleeved on one side of the protruding section of push ring 7. In the assembled state, one end of spring 8 axially abuts against the outer wall of push ring 7, and the other end axially abuts against the outer wall of positioning ring 10. This arrangement puts spring 8 in a pre-compressed state, thereby continuously applying an axial thrust to push ring 7 in the direction of stationary ring 1. This thrust is transmitted to moving ring 6 through push ring 7 and is the main source of compensating force to maintain tight contact between the end face of moving ring 6 and stationary ring 1.

[0027] Meanwhile, the aforementioned corrugated sleeve 9 completely houses the spring 8 within its hollow corrugated cavity, please refer to... Figure 3 The corrugated structure of the bellows sleeve 9 gives it good axial flexibility while maintaining high rigidity in the radial direction. This structural fit ensures multiple technical effects: First, the bellows sleeve 9 completely physically isolates the spring 8 from the pump medium, preventing the spring 8 from losing its elasticity or becoming stuck due to corrosion, crystals, or solid particles. Second, the elastic deformation of the bellows sleeve 9 can buffer the direct impact of the pump shaft's violent axial movement on the spring 8, protecting the structural integrity of the spring 8 and making its output thrust more stable.

[0028] To achieve a complete seal between the rotating and stationary components, the device is also equipped with multiple auxiliary seals; please refer to [reference needed]. Figure 1 , Figure 2 and Figure 4 A sealing ring 5 is embedded between the moving ring 6 and the pump shaft, a sealing ring 11 is embedded between the thrust ring 7 and the pump shaft, and a sealing ring 2 is embedded between the stationary ring 1 and the pump body. These three auxiliary seals block possible leakage paths and, together with the main sealing surface formed by the moving ring 6 and the stationary ring 1, form a complete sealing barrier.

[0029] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In order to provide a more stable and sensitive secondary pressure compensation source in addition to the main compensation force provided by spring 8, for precise compensation of the minute wear generated on the dynamic and static sealing surfaces during long-term operation, please refer to the following: Figure 2 The protective device also preferably has a disc spring assembly 4 and a rubber pad 3 in the inner cavity of the stationary ring 1. The disc spring assembly 4 is composed of multiple disc springs stacked or combined, which can provide huge axial pressure within a very small deformation range. One end of the disc spring assembly 4 abuts against the inner wall of the stationary ring 1, and the other end abuts against the rubber pad 3. The rubber pad 3 can be slidably disposed in the stationary ring 1 along the axial direction, and its other side abuts against the aforementioned sealing ring 11, thereby forming a complete two-stage pressure transmission path. This path starts from the inner wall of the stationary ring 1, passes through the disc spring assembly 4, the rubber pad 3, and the sealing ring 11 in sequence, and finally applies the compensation pressure to the push ring 7.

[0030] Working principle: When the pump shaft starts to rotate and produces radial wobbling, the positioning ring 10, which is fixed to the pump shaft by fasteners, shakes synchronously. Since the positioning ring 10 is fixedly connected to the outer wall of the push ring 7 through the bellows sleeve 9 and the bellows sleeve 9 has high radial stiffness, the radial wobbling is transmitted to the push ring 7, which in turn drives the moving ring 6, which is slidably arranged inside the push ring 7, to shake synchronously. This structure ensures that the rotation center of the moving ring 6 is always precisely aligned with the center of the stationary ring 1, which is fixedly installed on the pump body, thereby avoiding leakage caused by misalignment of the dynamic and static sealing surfaces due to pump shaft wobbling.

[0031] When the pump shaft experiences axial movement or vibration, this axial displacement is transmitted to the positioning ring 10. At this time, the bellows sleeve 9 uses its axial elastic expansion and contraction capability to absorb and buffer the axial movement and vibration through its own compression or tension deformation. This ensures that the axial force on the spring 8, which is sleeved between the push ring 7 and the positioning ring 10 and is wrapped by the bellows sleeve 9, remains stable. This allows the spring 8 to continuously and stably push the push ring 7, thereby pushing the moving ring 6 against the stationary ring 1, maintaining a constant sealing surface contact pressure.

[0032] During long-term operation of the device, the sealing surfaces of the rotating ring 6 and the stationary ring 1 will experience slight wear. At this time, the preload thrust of the spring 8 will continuously push the push ring 7 and the rotating ring 6 to automatically compensate for the wear gap along the axial direction. At the same time, the disc spring assembly 4 set in the inner cavity of the stationary ring 1 will apply a constant auxiliary thrust to the sealing ring 11 through the rubber pad 3 that can be slidably set along the axial direction. This force is also transmitted to the push ring 7, and together with the thrust of the spring 8, it achieves sensitive and dual automatic compensation for the wear of the sealing surface, ensuring the long-term reliability of the seal.

[0033] During this process, the bellows sleeve 9 completely encloses the spring 8 and isolates it from the medium, preventing the spring 8 from being corroded or stuck by particles in the medium. The sealing ring 5 is embedded between the moving ring 6 and the pump shaft, the sealing ring 11 is embedded between the push ring 7 and the pump shaft, and the sealing ring 2 is embedded between the stationary ring 1 and the pump body. These three seals work together to block all potential auxiliary leakage paths.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. Protective devices to prevent environmental accidents caused by internal leakage of triple-effect pumps, including: Pump body and pump shaft rotatably passing through the pump body; A stationary ring (1) is fixedly installed on the pump body; A push ring (7) is sleeved on the outside of the pump shaft; The moving ring (6) is slidably disposed on the inner side of the push ring (7) and fits against the end face of the stationary ring (1) to form a dynamic and static sealing surface; Its features are, The protective device also includes: A positioning ring (10) is fixed to the pump shaft by fasteners; The corrugated sleeve (9) has one end fixedly connected to the outer wall of the positioning ring (10) and the other end fixedly connected to the outer wall of the push ring (7).

2. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump as described in claim 1, characterized in that, It also includes a spring (8), which is sleeved on one side of the protruding section of the push ring (7), with one end abutting against the outer wall of the push ring (7) and the other end abutting against the outer wall of the positioning ring (10), and the spring (8) is completely wrapped by the corrugated sleeve (9).

3. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump as described in claim 1, characterized in that, It also includes a sealing ring (5), which is embedded between the moving ring (6) and the pump shaft.

4. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump as described in claim 1, characterized in that, It also includes a sealing ring (11), which is embedded between the push ring (7) and the pump shaft.

5. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump as described in claim 1, characterized in that, It also includes a sealing ring (2), which is embedded between the stationary ring (1) and the pump body.

6. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump as described in claim 4, characterized in that, A disc spring assembly (4) is provided in the inner cavity of the stationary ring (1).

7. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump as described in claim 6, characterized in that, It also includes a rubber pad (3), which is slidably disposed in the stationary ring (1) along the axial direction, and the rubber pad (3) is located between the disc spring assembly (4) and the sealing ring (11).

8. The protective device for preventing environmental accidents caused by internal leakage of a triple-effect pump according to claim 7, characterized in that, One end of the disc spring assembly (4) abuts against the inner wall of the stationary ring (1), and the other end abuts against the sealing ring (11) through the rubber pad (3).

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