A diaphragm pump for delivering high temperature media

Abstract

The application discloses a diaphragm pump for conveying high-temperature medium, and belongs to the technical field of diaphragm pumps.The diaphragm pump comprises a power end and a liquid force end, wherein the liquid force end comprises an isolation device, one end of the isolation device is connected with an inlet-outlet material compensation system, the other end of the isolation device is connected with a cooling device, the other end of the cooling device is connected with a diaphragm chamber of the liquid force end, the isolation device is used for isolating high-temperature medium from a diaphragm, and the cooling device is used for reducing the temperature in front of the diaphragm.The diaphragm pump can overcome the defects of traditional diaphragm pumps that cannot convey high-temperature slurry, and can guarantee a longer service life of a rubber diaphragm.

Description

Technical Field

[0001] This invention belongs to the field of diaphragm pump technology, and specifically relates to a diaphragm pump for conveying high-temperature media. Background Technology

[0002] Conventional diaphragm pumps typically only transport media with temperatures below 100℃, failing to meet the requirements for transporting high-temperature solid-liquid two-phase media. The core reason is that the rubber diaphragm, as a key component of the pump, is highly sensitive to temperature. High-temperature environments significantly reduce the elasticity, flexibility, and wear resistance of the rubber diaphragm, accelerating aging and severely impacting its service life and the pump's continuous operational stability.

[0003] To address this issue, existing technologies attempt to add isolators to diaphragm pumps as thermal insulation devices to separate the high-temperature medium from the rubber diaphragm. However, isolators cannot completely block heat transfer; heat can still be transferred to the diaphragm end through conduction or minor leakage of the high-temperature medium. Therefore, simply adding isolators is insufficient to ensure the diaphragm operates at permissible temperatures for extended periods. Summary of the Invention

[0004] This invention addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a diaphragm pump for conveying high-temperature media. While overcoming the limitation of traditional diaphragm pumps in being unable to convey high-temperature slurries, this invention also ensures a longer service life for the rubber diaphragm.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] This invention provides a diaphragm pump for conveying high-temperature media, comprising a power end and a hydraulic end. The hydraulic end includes an isolation device, one end of which is connected to an inlet / outlet compensation system, and the other end is connected to a cooling device. The other end of the cooling device is connected to the diaphragm chamber of the hydraulic end. The isolation device is used to isolate the high-temperature media from the diaphragm, and the cooling device is used to reduce the temperature before the diaphragm.

[0007] Furthermore, the isolation device is provided with a sliding bracket and a floating piston slidably mounted on the sliding bracket. The floating piston is used to reciprocate under the drive of the diaphragm to push the high-temperature medium.

[0008] Furthermore, the cooling device is provided with a cooling water inlet and a cooling water outlet, and the cooling device is provided with a turbulence generator for converting laminar flow into turbulent flow to enhance heat transfer.

[0009] Furthermore, the cooling device is also equipped with finned tubes and corrugated tubes. The finned tubes are used for the flow of the medium, and the corrugated tubes are sleeved on the outside of the finned tubes to absorb thermal expansion and contraction.

[0010] Furthermore, an expansion joint for absorbing thermal displacement and vibration is connected below the diaphragm chamber of the hydraulic end.

[0011] Furthermore, a temperature detection device for real-time temperature monitoring is provided at the diaphragm chamber of the cooling device and the hydraulic end.

[0012] Furthermore, it also includes a main motor, the output shaft of which is connected to the input shaft of a reducer, the output shaft of which is connected to the crankshaft of the power end, and the crosshead of the power end is connected to the piston of the hydraulic end.

[0013] Furthermore, it also includes a hydraulic auxiliary control system and an electrical auxiliary control system. The hydraulic auxiliary control system is connected to the hydraulic end diaphragm chamber and the bearings and guide plates of the power end, and the electrical auxiliary control system is connected to the control end of the main motor and the output end of the temperature detection device.

[0014] Furthermore, the feed compensation system includes a feed compensation system and a discharge compensation system. The outlet of the feed compensation system is connected to the feed inlet of the isolation device, and the inlet of the discharge compensation system is connected to the discharge outlet of the isolation device.

[0015] The beneficial effects of the present invention.

[0016] This invention effectively solves the problem of traditional diaphragm pumps being unable to transport high-temperature media by connecting an isolation device and a cooling device in series at the hydraulic end. It isolates the high-temperature medium from the core component, the rubber diaphragm, and actively cools the ambient temperature before the diaphragm, ensuring a long service life for the diaphragm. By incorporating a sliding support and a floating piston within the isolation device, it achieves the dual functions of power transmission and media isolation, resulting in a simple and reliable structure. The cooling device, with its turbulence generator, finned tubes, and bellows structure, significantly enhances heat exchange efficiency, making the cooling device more compact and improving cooling performance, while effectively compensating for thermal expansion and contraction. An expansion joint below the diaphragm chamber effectively absorbs thermal displacement and system vibration under high-temperature conditions, improving the safety and reliability of the entire pipeline system. A temperature detection device enables closed-loop control of the diaphragm's operating temperature, further ensuring the long-term, stable, and safe operation of the diaphragm pump. The hydraulic auxiliary control system is connected to the diaphragm chamber, power end bearings, and guide plates, enabling lubrication, cooling, and diaphragm position control of key components. The electrical auxiliary control system is connected to the main motor and temperature detection device, enabling electrical control and temperature monitoring of the entire machine, ensuring stable and automated operation of the pump. Attached Figure Description

[0017] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0019] Figure 2 This is a top view of the structure of the present invention.

[0020] The markings in the diagram are as follows: 101 is the main motor, 102 is the reducer, 103 is the power end, 104 is the hydraulic end, 105 is the cooling water inlet, 106 is the cooling device, 107 is the cooling water outlet, 108 is the isolation device, 109 is the discharge compensation system, 110 is the feed compensation system, 111 is the floating piston, 112 is the turbulence generator, 113 is the finned tube and bellows, 114 is the sliding support, 115 is the expansion joint, 116 is the temperature detection device, 117 is the hydraulic auxiliary control system, and 118 is the electrical auxiliary control system. Detailed Implementation

[0021] As shown in the accompanying drawings, this embodiment provides a diaphragm pump for conveying high-temperature media, the core of which lies in the special structure of the hydraulic end 104. The hydraulic end 104 includes an isolation device 108 and a cooling device 106. One end of the isolation device 108 is connected to the feed compensation system 110 and the discharge compensation system 109 for drawing in and discharging the high-temperature media. Specifically, the outlet of the feed compensation system 110 is connected to the inlet of the isolation device 108 for supplying the high-temperature media to the isolation device 108, and the inlet of the discharge compensation system 109 is connected to the outlet of the isolation device 108 for discharging the compressed high-temperature media from the isolation device 108. The other end of the isolation device 108 is connected to one end of the cooling device 106, and the other end of the cooling device 106 is connected to the diaphragm chamber of the hydraulic end 104. The isolation device 108 physically isolates the high-temperature media from the diaphragm, while the cooling device 106 cools the intermediate media between the isolation device 108 and the diaphragm chamber, jointly ensuring the working environment of the diaphragm.

[0022] The isolation device 108 contains a sliding support 114 and a floating piston 111 slidably mounted on the sliding support 114. One side of the floating piston 111 is in contact with the high-temperature medium, and the other side is in contact with the intermediate medium inside the isolation device 108. When the diaphragm of the hydraulic end 104 reciprocates, it compresses the intermediate medium and pushes the floating piston 111 to reciprocate on the sliding support 114, thereby compressing and transporting the high-temperature medium.

[0023] The cooling device 106 is equipped with a cooling water inlet 105 and a cooling water outlet 107 for connecting circulating cooling water. Inside the cooling device 106, there is a turbulence generator 112, finned tubes, and a bellows 113. The intermediate medium on the high-temperature side flows inside the finned tubes, while the cooling water flows outside. The turbulence generator 112 disrupts the cooling water, transforming it from a stable laminar flow to a chaotic turbulent flow, greatly enhancing the heat transfer efficiency between the fluid and the tube wall. The structure of the finned tubes significantly increases the heat exchange area, substantially improving heat transfer efficiency. Simultaneously, the bellows fitted around the outside of the finned tubes compensates for thermal expansion and contraction caused by temperature differences between the inside and outside of the finned tubes, preventing damage to the pipes and supports due to stress concentration.

[0024] To cope with thermal expansion and vibration under high-temperature conditions, an expansion joint 115 is connected below the diaphragm chamber of the hydraulic end 104. The expansion joint 115 is used to absorb and compensate for pipeline thermal displacement caused by continuous high temperature during the transportation of high-temperature media, as well as displacement caused by equipment vibration and slight movement of pipeline supports, thus protecting the system from damage.

[0025] To ensure that the diaphragm always operates at the permissible temperature, a temperature detection device 116 is installed at the diaphragm chamber of the cooling device 106 and the hydraulic end 104. The temperature detection device 116 is used to monitor the temperature at key locations in real time and feed the data back to the control system so as to adjust the cooling water flow rate and ensure that the diaphragm temperature is always controlled within a reasonable range.

[0026] The output shaft of the main motor 101 is connected to the input shaft of the reducer 102, which is used to reduce the speed and increase the torque. The output shaft of the reducer 102 is connected to the crankshaft of the power end 103, driving the crankshaft to rotate. The crank-slider mechanism inside the power end 103 converts the rotational motion of the crankshaft into the linear reciprocating motion of the crosshead. The crosshead of the power end 103 is connected to the piston of the hydraulic end 104, thereby driving the piston to reciprocate and providing power for the entire conveying process.

[0027] In addition, a hydraulic auxiliary control system 117 and an electrical auxiliary control system 118 are also provided. The hydraulic auxiliary control system 117 is connected to the diaphragm chamber of the hydraulic end 104 and the bearings and guide plates of the power end 103 to provide lubrication and cooling to these key moving parts, and also participates in controlling the movement position of the diaphragm to ensure the smooth and reliable operation of the diaphragm pump. The electrical auxiliary control system 118 is connected to the control terminal of the main motor 101 and the output terminal of the temperature detection device 116 to realize the electrical control of the main motor 101, such as starting, stopping, and speed adjustment, as well as to receive and process the monitoring signals of the temperature detection device 116 to achieve automated temperature monitoring and regulation.

[0028] It is understood that the above specific description of the present invention is only for illustrating the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of the present invention.

Claims

1. A diaphragm pump for conveying high-temperature media, comprising a power end (103) and a hydraulic end (104), characterized in that, The hydraulic end (104) includes an isolation device (108), one end of which is connected to the feed / discharge compensation system (109), and the other end is connected to a cooling device (106). The other end of the cooling device (106) is connected to the diaphragm chamber of the hydraulic end (104). The isolation device (108) is used to isolate the high-temperature medium from the diaphragm, and the cooling device (106) is used to reduce the temperature in front of the diaphragm.

2. A diaphragm pump for conveying high-temperature media according to claim 1, characterized in that, The isolation device (108) is provided with a sliding bracket (114) and a floating piston (111) slidably mounted on the sliding bracket (114). The floating piston (111) is used to reciprocate under the drive of the diaphragm to push the high-temperature medium.

3. A diaphragm pump for conveying high-temperature media according to claim 1, characterized in that, The cooling device (106) is provided with a cooling water inlet (105) and a cooling water outlet (107), and the cooling device (106) is provided with a turbulent flow generator (112) for changing laminar flow into turbulent flow to enhance heat transfer.

4. A diaphragm pump for conveying high-temperature media according to claim 3, characterized in that, The cooling device (106) is also provided with a finned tube and a corrugated tube (113). The finned tube is used to flow the medium, and the corrugated tube is sleeved on the outside of the finned tube to absorb thermal expansion and contraction.

5. A diaphragm pump for conveying high-temperature media according to claim 1, characterized in that, An expansion joint (115) for absorbing thermal displacement and vibration is connected below the diaphragm chamber of the hydraulic end (104).

6. A diaphragm pump for conveying high-temperature media according to claim 1, characterized in that, A temperature detection device (116) for real-time temperature monitoring is provided at the diaphragm chamber of the cooling device (106) and the hydraulic end (104).

7. A diaphragm pump for conveying high-temperature media according to claim 6, characterized in that, It also includes a main motor (101), the output shaft of which is connected to the input shaft of a reducer (102), the output shaft of which is connected to the crankshaft of the power end (103), and the crosshead of the power end (103) is connected to the piston of the hydraulic end (104).

8. A diaphragm pump for conveying high-temperature media according to claim 7, characterized in that, It also includes a hydraulic auxiliary control system (117) and an electrical auxiliary control system (118). The hydraulic auxiliary control system (117) is connected to the diaphragm chamber of the hydraulic end (104) and the bearing and guide plate of the power end (103). The electrical auxiliary control system (118) is connected to the control end of the main motor (101) and the output end of the temperature detection device (116).

9. A diaphragm pump for conveying high-temperature media according to claim 1, characterized in that, The feed compensation system (109) includes a feed compensation system (110) and a discharge compensation system (109). The outlet of the feed compensation system (110) is connected to the feed inlet of the isolation device (108), and the inlet of the discharge compensation system (109) is connected to the discharge outlet of the isolation device (108).

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