Leakage-free magnetic drive type xylene transfer pump

Abstract

The utility model relates to the technical field of petroleum chemical industry discloses a kind of xylene transfer pumps of no-leakage magnetic force drive, including motor, shell, pump body, import pipe and export pipe, drive assembly is set to the inside of shell and pump body, including isolating sleeve, outer magnetic rotor, inner magnetic rotor, connecting shaft and impeller, isolating sleeve sealing connection shell and the butt joint end of pump body, outer magnetic rotor is connected with motor output shaft and surrounds isolating sleeve outside, inner magnetic rotor drives impeller rotation by connecting shaft, import pipe and export pipe are equipped with connecting assembly, including connector, threaded sleeve, clamping block and sealing ring, the quick connection of external pipeline is realized, pump body bottom is also provided with emptying assembly, including emptying pipe, ball valve and handle. The utility model realizes medium no-leakage transfer by magnetic force drive, solves the leakage problem of conventional pump, connecting assembly provides quick sealing connection, emptying assembly is convenient for residual liquid to be discharged completely, avoids corrosion pollution, significantly improves safety and operation convenience.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical technology, and in particular to a leak-free magnetically driven xylene transfer pump. Background Technology

[0002] In industries such as petrochemicals, pharmaceuticals, and fine chemicals, the transportation of volatile, flammable, explosive, or toxic chemical media such as xylene is a common production process. Traditional centrifugal pumps typically employ dynamic sealing structures, such as mechanical seals or packing seals, to prevent leakage when transporting these media. However, over long-term operation, these dynamic seals are affected by factors such as media corrosion, wear, temperature changes, and operating pressure fluctuations, causing their sealing performance to gradually decline, eventually leading to leakage from the shaft seal.

[0003] Leaks not only result in the loss of valuable media, but more importantly, the volatility of xylene allows the leaked media to rapidly spread into the surrounding environment, causing severe air pollution and posing a threat to the health of operators. Furthermore, its flammable and explosive properties can lead to fires or explosions under certain conditions, posing significant risks to production and potential economic losses. Although existing technologies have developed various improved sealing structures, they still cannot completely eliminate the risk of seal failure under complex operating conditions and long-term operation. Therefore, how to fundamentally eliminate dynamic seal leakage points and achieve absolutely safe and reliable transfer of chemical media has always been a pressing technical challenge in this field.

[0004] Therefore, this invention proposes a leak-free magnetically driven xylene transfer pump to address the shortcomings of existing technologies. Utility Model Content

[0005] In view of the problems of high risk of dynamic seal leakage, complex pipeline connection structure, inconvenient installation and disassembly, and difficulty in completely draining residual liquid in the pump in the existing chemical transfer pump, this utility model aims to provide a leak-free magnetically driven xylene transfer pump with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a leak-free magnetically driven xylene transfer pump, including a motor; a housing; a pump body; an inlet pipe; and an outlet pipe. The pump body defines an internal cavity and has an inlet end and an outlet end. The housing is fixedly connected to the pump body by bolts. One end of the inlet pipe is fixedly connected to the inlet end of the pump body, and one end of the outlet pipe is fixedly connected to the outlet end of the pump body.

[0007] Furthermore, the pump also includes a drive assembly disposed within the outer casing and pump body. The drive assembly includes an isolation sleeve, an outer magnetic rotor, an inner magnetic rotor, a connecting shaft, and an impeller. The isolation sleeve is a hollow structure, with its open end sealed and fixed at the joint between the outer casing and the pump body, physically isolating the internal space of the outer casing from the receiving cavity of the pump body. The outer magnetic rotor is rotatably disposed within the outer casing and coaxially surrounds the outer peripheral wall of the isolation sleeve, and is fixedly connected to the output shaft of the motor. The inner magnetic rotor is rotatably disposed within the receiving cavity of the pump body and coaxially housed within the internal space of the isolation sleeve. One end of the connecting shaft is fixedly connected to the inner magnetic rotor, while the impeller is fixed to the other end of the connecting shaft and located within the receiving cavity of the pump body. This structural design achieves complete isolation between the pumped medium and the power transmission components, fundamentally eliminating the possibility of leakage.

[0008] Preferably, both the inlet and outlet pipes have a connecting assembly at their ends furthest from the pump body. This connecting assembly includes a connector fixed to the end of the inlet or outlet pipe. This design allows for easy connection of external pipelines to the pump body.

[0009] Preferably, the connecting assembly further includes a threaded sleeve and a clamping block. The threaded sleeve is threadedly connected to the outer periphery of the connector, and the clamping block is located at the end of the connector. The clamping action of tightening the threaded sleeve on the clamping block achieves rapid locking of the external pipe.

[0010] Preferably, the threaded sleeve has a tapered inner wall that radially compresses the clamping block when the threaded sleeve is screwed axially onto the connector. This tapered compression structure ensures a firm and reliable clamping.

[0011] Preferably, a sealing ring is also provided inside the connector. The sealing ring provides additional sealing protection, further preventing media leakage at the connection.

[0012] Preferably, a venting assembly is also fixedly installed at the bottom of the pump body. The venting assembly facilitates the removal of residual media inside the pump body.

[0013] Preferably, the venting assembly includes a venting pipe fixedly installed at the bottom of the pump body; a ball valve disposed within the venting pipe; and a rotary handle fixedly connected to the ball valve, the ball valve having a communication hole. This structure allows control of the connection between the pump body and the venting pipe by operating the rotary handle, thereby achieving the discharge of residual liquid.

[0014] Preferably, the pump further includes a first support plate and a second support plate, with the outer casing fixed to the first support plate and the pump body fixed to the second support plate. The support plates provide a stable mounting base for the entire pump assembly.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model completely isolates the motor drive part from the internal fluid chamber of the pump body by adopting a magnetic drive component, which solves the leakage problem caused by wear and aging of traditional mechanical shaft seals or packing seals in the prior art. It achieves the technical effect of leakage-free transportation of corrosive or volatile media such as xylene, effectively ensuring production safety and environmental protection.

[0017] 2. This utility model solves the problems of complex installation and disassembly, time-consuming and labor-intensive installation and disassembly of flange connection methods in the prior art by designing a connection assembly with a connector, threaded sleeve, clamping block and sealing ring. It achieves the technical effect of fast, convenient and reliable connection and disassembly between external conveying pipeline and pump inlet and outlet pipes, and significantly improves work efficiency.

[0018] 3. This utility model solves the problem in the prior art that it is difficult to completely drain the residual liquid in the pump body and pipeline after the pump stops by setting a drain assembly with a drain pipe, ball valve and handle at the bottom of the pump body. It achieves the technical effect of conveniently and safely draining residual xylene, and effectively avoids equipment corrosion and chemical volatilization pollution caused by long-term retention of residues. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a leak-free magnetically driven xylene transfer pump proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of a leak-free magnetically driven xylene transfer pump proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the pump body structure of a leak-free magnetically driven xylene transfer pump proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the connection assembly of a leak-free magnetically driven xylene transfer pump proposed in this utility model.

[0023] Figure 5 This is a schematic diagram of the venting assembly of a leak-free magnetically driven xylene transfer pump proposed in this utility model.

[0024] Legend:

[0025] 1. Casing; 2. Pump body; 3. Drive assembly; 301. Outer magnetic rotor; 302. Inner magnetic rotor; 303. Isolation sleeve; 304. Connecting shaft; 305. Impeller; 4. Inlet pipe; 5. Outlet pipe; 6. Connecting assembly; 601. Connector; 602. Threaded sleeve; 603. Clamping block; 604. Sealing ring; 7. Drain assembly; 701. Drain pipe; 702. Ball valve; 703. Rotary handle; 704. Connecting hole; 8. Motor; 9. First support plate; 10. Second support plate. Detailed Implementation

[0026] 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.

[0027] Example:

[0028] Please refer to Figures 1 to 5 This utility model provides a leak-free magnetically driven xylene transfer pump, which aims to solve the problems of dynamic seal leakage risk, complex pipeline connection structure and difficulty in draining residual liquid in the pump that are common in existing chemical transfer pumps.

[0029] like Figure 1 and Figure 2 As shown, the leak-free magnetically driven xylene transfer pump includes a motor 8, a housing 1, a pump body 2, a first support plate 9, and a second support plate 10. The motor 8 is fixedly mounted on the housing 1 by bolts. The housing 1 and the pump body 2 are fixedly connected by bolts. The housing 1 is fixed to the first support plate 9, and the pump body 2 is fixed to the second support plate 10, thus forming the overall support and fixing frame of the pump set. The pump body 2 defines an internal cavity for containing and pumping fluid, and the pump body 2 has an inlet end and an outlet end. One end of the inlet pipe 4 is fixedly connected to the inlet end of the pump body 2, and one end of the outlet pipe 5 is fixedly connected to the outlet end of the pump body 2, for guiding fluid in and out of the pump body 2.

[0030] Please refer to the following carefully. Figure 2 and Figure 3The pump also includes a drive assembly 3 disposed inside the outer casing 1 and the pump body 2. The drive assembly 3 is the core for achieving leakage-free magnetic drive. Its specific structure is as follows: the drive assembly 3 includes an isolation sleeve 303, an outer magnetic rotor 301, an inner magnetic rotor 302, a connecting shaft 304, and an impeller 305. The isolation sleeve 303 is a hollow structure, and its open end is sealed and fixed at the joint between the outer casing 1 and the pump body 2. In this way, the isolation sleeve 303 completely physically isolates the internal space of the outer casing 1 from the receiving cavity of the pump body 2, forming a static seal structure. The outer magnetic rotor 301 rotates... The outer magnetic rotor 301 is fixedly connected to the output shaft of the motor 8 to receive power from the motor 8. The inner magnetic rotor 302 is rotatably disposed in the receiving cavity of the pump body 2 and coaxially housed in the internal space of the isolation sleeve 303, thereby being separated from the outer magnetic rotor 301 by the wall thickness of the isolation sleeve 303. One end of the connecting shaft 304 is fixedly connected to the inner magnetic rotor 302, and the impeller 305 is fixed to the other end of the connecting shaft 304. The impeller 305 is located entirely in the receiving cavity of the pump body 2.

[0031] To achieve a quick, leak-free, and detachable connection to external pipelines, the leak-free magnetically driven xylene transfer pump is equipped with a connection assembly 6 at the other end of the inlet pipe 4 and the outlet pipe 5, away from the pump body 2, thus replacing the traditional complex flange connection structure.

[0032] Please refer to the following carefully. Figure 4 The structure of the connecting assembly 6 is described in detail below: The connecting assembly 6 includes a connector 601 fixed to the end of the inlet pipe 4 or the outlet pipe 5, with the connector 601 serving as the base for connection; the connecting assembly 6 also includes a threaded sleeve 602, a clamping block 603, and a sealing ring 604; wherein, the threaded sleeve 602 is threadedly connected to the outer periphery of the connector 601; the clamping block 603 is disposed at the end of the connector 601; and the sealing ring 604 is disposed inside the connector 601; specifically, the threaded sleeve 602 has a tapered inner wall, and the structural design of this tapered inner wall is key to achieving rapid clamping. As the sleeve 602 is screwed axially onto the connector 601, its conical inner wall will radially press the clamp 603 inward, forcing the clamp 603 to tightly hold the external delivery pipe inserted into the connector 601, thereby achieving a firm physical fixation. At the same time, the sealing ring 604 located inside the connector 601 forms a tight elastic seal on its outer wall after the external delivery pipe is inserted. This synergistic effect of the threaded sleeve 602, the clamp 603, and the sealing ring 604 ensures that the connection part can be quickly installed and disassembled in terms of structure, and can also achieve a reliable leak-proof effect in terms of function.

[0033] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0034] As a preferred embodiment, in order to safely and thoroughly drain the residual liquid in the pump body 2 and pipelines after the pump stops working, and to avoid chemical corrosion or evaporation pollution, the leak-free magnetically driven xylene transfer pump is also equipped with a venting assembly 7 fixedly installed at the bottom of the pump body 2; please refer to the following for details. Figure 5 The venting assembly 7 includes a venting pipe 701 fixedly installed at the bottom of the pump body 2, a ball valve 702 installed inside the venting pipe 701, and a handle 703 fixedly connected to the ball valve 702. More specifically, the ball valve 702 has a connecting hole 704. By operating the handle 703 outside the pump body 2, the ball valve 702 can be rotated inside the venting pipe 701, thereby changing the position of the connecting hole 704 so that the inside of the pump body 2 is connected to or disconnected from the venting pipe 701, thereby controlling the discharge of residual liquid.

[0035] The working principle of this leak-free magnetically driven xylene transfer pump is as follows:

[0036] When the motor 8 is started, the output shaft of the motor 8 drives the outer magnetic rotor 301 inside the housing 1 to rotate. The rotating magnetic field generated by the outer magnetic rotor 301 can penetrate the stationary isolation sleeve 303 without contact, thereby driving the inner magnetic rotor 302 located in the receiving cavity of the pump body 2 to achieve synchronous rotation. Since the inner magnetic rotor 302 is fixedly connected to the impeller 305 through the connecting shaft 304, the rotation of the inner magnetic rotor 302 will drive the impeller 305 to rotate at high speed in the pump body 2. The rotating impeller 305 creates a negative pressure in the receiving cavity of the pump body 2. The external xylene is drawn into the pump body 2 through the inlet pipe 4, and then pressurized under the push of the impeller 305 and discharged from the outlet pipe 5. Through this non-contact transmission of magnetic coupling, the transfer of xylene in the fully sealed cavity is realized, fundamentally eliminating leakage.

[0037] When it is necessary to connect or disconnect external delivery pipelines, the operator only needs to insert or pull the pipeline into or out of the connector 601 and loosen or tighten the threaded sleeve 602. During the tightening of the threaded sleeve 602, its conical inner wall will squeeze the clamp 603, so that the clamp 603 firmly clamps the pipeline. At the same time, the internal sealing ring 604 provides a reliable seal. This process does not require aligning bolt holes or using special tools, realizing a fast, convenient and reliable pipeline connection.

[0038] When the pump stops working, if it is necessary to drain the xylene remaining in the pump, simply rotate the handle 703 located at the bottom of the pump body 2 to make the connecting hole 704 of the ball valve 702 connect with the inside of the pump body 2. The liquid remaining in the pump body 2 and the pipeline will be discharged through the drain pipe 701 under the action of gravity. The operation is simple and safe.

[0039] 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. A leak-free magnetically driven xylene transfer pump, comprising: Motor (8); The outer casing (1) is to which the motor (8) is fixedly mounted by bolts; Pump body (2), which defines an internal receiving cavity and is provided with an inlet end and an outlet end, the outer shell (1) and the pump body (2) are fixedly connected by bolts; The inlet pipe (4) is fixedly connected at one end to the inlet end of the pump body (2); The outlet pipe (5) is fixedly connected at one end to the outlet end of the pump body (2); The pump is characterized in that it further includes a drive assembly (3) disposed inside the housing (1) and the pump body (2), the drive assembly (3) comprising: An isolation sleeve (303) is a hollow structure. Its open end is sealed and fixed at the joint between the outer shell (1) and the pump body (2) to physically isolate the internal space of the outer shell (1) from the receiving cavity of the pump body (2). An external magnetic rotor (301) is rotatably disposed inside the outer casing (1) and coaxially surrounds the outer peripheral wall of the isolation sleeve (303). The external magnetic rotor (301) is fixedly connected to the output shaft of the motor (8). An inner magnetic rotor (302) is rotatably disposed within the receiving cavity of the pump body (2) and coaxially housed within the internal space of the isolation sleeve (303); A connecting shaft (304) is fixedly connected at one end to the inner magnetic rotor (302); And an impeller (305), which is fixed to the other end of the connecting shaft (304) and located in the receiving cavity of the pump body (2).

2. The leak-free magnetically driven xylene transfer pump according to claim 1, characterized in that, Both the inlet pipe (4) and the outlet pipe (5) are provided with a connecting assembly (6) at the other end away from the pump body (2). The connecting assembly (6) includes a connector (601) fixed to the end of the inlet pipe (4) or the outlet pipe (5).

3. The leak-free magnetically driven xylene transfer pump according to claim 2, characterized in that, The connecting assembly (6) further includes a threaded sleeve (602) threadedly connected to the outer periphery of the connector (601), and a clamping block (603) disposed at the end of the connector (601).

4. The leak-free magnetically driven xylene transfer pump according to claim 3, characterized in that, The threaded sleeve (602) has a tapered inner wall that, when the threaded sleeve (602) is screwed axially onto the connector (601), radially compresses the clamping block (603).

5. The leak-free magnetically driven xylene transfer pump according to claim 3, characterized in that, The connector (601) also has a sealing ring (604) inside.

6. The leak-free magnetically driven xylene transfer pump according to claim 1, characterized in that, The bottom of the pump body (2) is also fixedly provided with a venting component (7).

7. The leak-free magnetically driven xylene transfer pump according to claim 6, characterized in that, The venting assembly (7) includes: a venting pipe (701) fixedly disposed at the bottom of the pump body (2); a ball valve (702) disposed in the venting pipe (701); and a handle (703) fixedly connected to the ball valve (702), wherein the ball valve (702) is provided with a connecting hole (704).

8. The leak-free magnetically driven xylene transfer pump according to claim 1, characterized in that, It also includes a first support plate (9) and a second support plate (10), the outer shell (1) is fixed on the first support plate (9), and the pump body (2) is fixed on the second support plate (10).

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