High-temperature-resistant single-runner diaphragm chamber

Abstract

The invention relates to the technical field of diaphragm pumps, in particular to a high-temperature-resistant single-runner diaphragm chamber which comprises a cooling pipe section, a diaphragm cavity and a diaphragm chamber gland installed on the diaphragm cavity, a diaphragm chamber is formed between the diaphragm chamber gland and the diaphragm cavity, and the two ends of the cooling pipe section are a high-temperature slurry end and a low-temperature slurry end respectively. The diaphragm cavity is provided with a feeding hole through which cooled slurry can enter or flow out of the diaphragm chamber from the bottom of the diaphragm chamber, the low-temperature slurry end is communicated to the feeding hole in the diaphragm chamber, and the high-temperature slurry end is used for receiving uncooled slurry; according to the diaphragm pump, on the premise that the form of the high-temperature slurry is not changed, direct pumping of the high-temperature and strong-corrosion slurry can be achieved, meanwhile, the effect of the high-temperature and strong-corrosion slurry on the diaphragm is effectively reduced, it is avoided that the diaphragm rapidly loses efficacy due to overtemperature and corrosion, and it is guaranteed that the diaphragm pump stably operates for a long time under the high-temperature and strong-corrosion working condition.

Description

Technical Field

[0001] This invention relates to the field of diaphragm pump technology, and more specifically to a high-temperature resistant single-channel diaphragm chamber. Background Technology

[0002] In diaphragm pump applications, when the operating temperature is ≥200℃, the slurry pumped by the hydraulic end is not only extremely hot, but also has a pH value in the highly corrosive range of 1.0-1.5. Conventional diaphragm pumps use a dual-channel design for the diaphragm chamber, with the inlet connected to the suction pipe seat and the outlet connected to the discharge valve assembly. The inlet and outlet are located side by side on the diaphragm chamber. The slurry enters the diaphragm chamber from the inlet and flows out from the outlet as the diaphragm reciprocates. That is, the pumping of the diaphragm and the flow of the slurry are both completed in the diaphragm chamber. However, at excessively high operating temperatures, the slurry flows directly through the diaphragm chamber and comes into contact with the diaphragm. Its temperature is far higher than the tolerance range of conventional rubber diaphragms, and it is impossible to avoid the slurry corroding the diaphragm.

[0003] In existing technologies, a low-temperature section pipe is often installed at the front end of the feed inlet. The low-temperature section pipe contains a high-temperature isolator to cool the slurry before it enters the diaphragm chamber from the feed inlet, so as to prevent the temperature from being too high and exceeding the tolerance range of the diaphragm. However, most slurries need to be pumped at high temperatures, such as asphalt, high-temperature molten salt, and slag slurries. If they are cooled down first, they will not be able to maintain the shape of the slurry at high temperatures, thus causing blockage.

[0004] Therefore, there is an urgent need for a diaphragm pump that can directly pump high-temperature and highly corrosive slurries without changing their high-temperature slurry morphology, while effectively reducing the effect of high-temperature and highly corrosive slurries on the diaphragm, preventing the diaphragm from failing rapidly due to overheating and corrosion, and ensuring the long-term stable operation of the diaphragm pump under high-temperature and highly corrosive conditions. Summary of the Invention

[0005] The present invention aims to provide a high-temperature resistant single-channel diaphragm chamber, which can realize the direct pumping of high-temperature and highly corrosive slurries without changing the morphology of the high-temperature slurry, while effectively reducing the effect of high-temperature and highly corrosive slurries on the diaphragm, avoiding rapid failure of the diaphragm due to overheating and corrosion, and ensuring long-term stable operation of the diaphragm pump under high-temperature and highly corrosive conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-temperature resistant single-channel diaphragm chamber, comprising a cooling pipe section, a diaphragm cavity, and a diaphragm chamber cover installed on the diaphragm cavity. A diaphragm chamber is formed between the diaphragm chamber cover and the diaphragm cavity. The two ends of the cooling pipe section are a high-temperature slurry end and a low-temperature slurry end, respectively. The diaphragm cavity is provided with an inlet that allows the cooled slurry to enter or exit the diaphragm chamber from the bottom. The low-temperature slurry end is connected to the inlet on the diaphragm chamber, and the high-temperature slurry end is used to receive the undcooled slurry.

[0007] The beneficial effects of this solution are as follows: by designing a single feed inlet, direct pumping of high-temperature and highly corrosive slurries is achieved without changing the morphology of the high-temperature slurry. This effectively reduces the effects of high temperature and strong corrosion on the diaphragm, avoids rapid diaphragm failure, ensures long-term stable operation of the diaphragm pump, and at the same time reduces production costs and improves pumping efficiency and equipment lifespan.

[0008] When the diaphragm in the diaphragm chamber contracts, the volume inside the diaphragm chamber increases and the pressure decreases. The resulting negative pressure is transmitted through the inlet, cooling pipe section, and pumping pipeline, driving the inlet valve to open and the outlet valve to close. The high-temperature slurry enters the pumping pipeline from the inlet valve. At this time, some of the high-temperature slurry enters the cooling pipe section for cooling under the negative pressure and then enters the diaphragm chamber from the inlet. At this point, the temperature of the slurry in the diaphragm chamber does not exceed the diaphragm's tolerance range. After the diaphragm contracts, the diaphragm enters the... During expansion, the volume inside the diaphragm chamber decreases, and the pressure increases. The negative pressure generated during contraction disappears, and the resulting pressure change is transmitted through the inlet, cooling pipe section, and pumping pipeline, driving the inlet valve to close and the outlet valve to open. The high-temperature slurry in the pumping pipeline flows out from the outlet valve under pressure, and the cooled slurry in the diaphragm chamber flows back from the inlet to the cooling pipe section. This not only realizes the pumping process of high-temperature slurry by the diaphragm pump, but also avoids the high-temperature slurry from directly contacting the diaphragm.

[0009] Furthermore, the diaphragm cavity has a first exhaust port at the top of the diaphragm chamber that communicates with the diaphragm chamber, and a second exhaust port on the side wall of the diaphragm cavity that communicates with the diaphragm chamber.

[0010] Furthermore, the inner wall of the diaphragm chamber is provided with adjacent first and second conical surfaces, and the connection between the first and second conical surfaces is a rounded transition. The first conical surface is located close to the first exhaust port, and the second exhaust port is connected to the first conical surface. The inclination angle of the first conical surface is greater than that of the second conical surface.

[0011] Furthermore, the diaphragm chamber cover includes a detachably connected outer cover and an inner cover, with the inner cover extending into the diaphragm chamber. The first conical surface has an annular groove at one end near the inner cover.

[0012] Furthermore, the inner pressure cover is recessed at one end towards the outer pressure cover to form the end face of the diaphragm chamber, and the inner pressure cover is provided with a feed port that connects the feed inlet and the diaphragm chamber.

[0013] Furthermore, the diaphragm cavity is provided with a temperature measuring hole that communicates with the feed inlet, and a temperature sensor is installed in the temperature measuring hole to monitor the temperature of the slurry at the feed inlet.

[0014] Furthermore, it also includes a pumping pipeline, with an inlet valve body at one end and a outlet valve body at the other end, and the high-temperature slurry end of the cooling pipe section is connected to the pumping pipeline. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure I ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure II .

[0016] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Cooling pipe section; 2. Diaphragm cavity; 3. Diaphragm chamber; 4. High-temperature slurry end; 5. Low-temperature slurry end; 6. Feed inlet; 7. First vent hole; 8. Second vent hole; 9. First conical surface; 10. Second conical surface; 11. Outer pressure cover; 12. Inner pressure cover; 13. Annular groove; 14. Diaphragm chamber end face; 15. Temperature measuring hole; 16. Temperature sensor; 17. Pumping pipe; 18. Feed valve body; 19. Discharge valve body; 20. Suction pipe seat. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] The basic implementation examples are as follows: Figure 1-2 As shown in the attached document Figure 1The high-temperature resistant single-channel diaphragm chamber shown includes a cooling pipe section 1, a diaphragm cavity 2, and a diaphragm chamber 3 cover installed on the diaphragm cavity 2. The diaphragm chamber 3 is formed between the diaphragm chamber 3 cover and the diaphragm cavity 2. The two ends of the cooling pipe section 1 are a high-temperature slurry end 4 and a low-temperature slurry end 5, respectively. The diaphragm cavity 2 is provided with an inlet 6 that allows the cooled slurry to enter or exit the diaphragm chamber 3 from the bottom. The low-temperature slurry end 5 is connected to the inlet 6 on the diaphragm chamber 3, and the high-temperature slurry end 4 is used to receive uncooled slurry. It also includes a pumping pipe 17, with an inlet valve body 18 at one end and a outlet valve body 19 at the other end. The high-temperature slurry end 4 of the cooling pipe section 1 is connected to the pumping pipe 17. The inlet valve body 18 and the outlet valve body 19 can be... The existing ball valve with ball seat is used, which will not be described in detail here; the existing guide rod and vibration isolator structure can be used in the cooling pipe section 1 to reduce the temperature of the slurry, which will not be described in detail here; the cooled slurry enters and exits the diaphragm chamber 3 only through the feed port 6, avoiding the diaphragm from contacting the high-temperature original slurry that exceeds its tolerance range, reducing the high-temperature resistance requirements of the diaphragm material. The diaphragm only needs to be made of corrosion-resistant material (such as perfluoroether rubber, fluororubber, tetrafluoropropylene rubber, ethylene propylene rubber, etc.), reducing production costs, while ensuring that the slurry pumped from the discharge valve body 19 maintains its original high-temperature state and avoids blockage; as a preferred embodiment, the feed port 6 and the low-temperature slurry end 5 are equipped with suction pipe seats 20 to ensure a leak-proof seal, optimize the flow of the slurry, and facilitate disassembly and maintenance.

[0020] When the diaphragm in diaphragm chamber 3 (not shown in the figure; the diaphragm and the guide rod driving the diaphragm movement are existing technologies) contracts, the volume inside diaphragm chamber 3 increases and the pressure decreases. The resulting negative pressure is transmitted through inlet 6, cooling pipe section 1, and pumping pipe 17, driving inlet valve body 18 to open and outlet valve body 19 to close. The high-temperature slurry enters pumping pipe 17 from inlet valve body 18. At this time, some of the high-temperature slurry enters cooling pipe section 1 for cooling under the action of negative pressure and enters diaphragm chamber 3 from inlet 6. The slurry in diaphragm chamber 3 at this time... The body temperature does not exceed the diaphragm's tolerance range; after the diaphragm shrinks, it expands. At this time, the volume inside the diaphragm chamber 3 decreases and the pressure increases. The negative pressure generated during shrinkage disappears, and the pressure change is also transmitted through the inlet 6, cooling pipe section 1, and pumping pipe 17, driving the inlet valve body 18 to close and the outlet valve body 19 to open. The high-temperature slurry in the pumping pipe 17 flows out from the outlet valve body 19 under pressure. The cooled slurry in the diaphragm chamber 3 flows back from the inlet 6 to the cooling pipe section 1. The above process is repeated to complete the pumping of the high-temperature slurry.

[0021] In this embodiment, the diaphragm cavity 2 is provided with a first vent 7 communicating with the diaphragm chamber 3 at the top of the diaphragm chamber 3, and a second vent 8 communicating with the diaphragm chamber 3 is provided on the side wall of the diaphragm cavity 2. The design of a single feed port 6 in the diaphragm chamber 3 prevents the gas and water vapor entrained in the slurry from being discharged naturally with the slurry, which easily accumulates in the diaphragm chamber 3, affecting the stability of the diaphragm pump operation. The first vent 7 can discharge the gas and water vapor in the slurry in time, and the second vent 8 can discharge the accumulated gas in the propellant (the propellant is a special hydraulic medium that fills between the piston chamber and the diaphragm back chamber). The dual venting avoids the accumulation of gas in the diaphragm chamber 3, ensures the stable operation of the diaphragm pump, and eliminates the problem of reduced pumping efficiency caused by gas accumulation.

[0022] In this embodiment, as shown in the appendix Figure 2 As shown, the inner wall of the diaphragm chamber 3 is provided with adjacent first conical surfaces 9 and second conical surfaces 10. The connection between the first conical surface 9 and the second conical surface 10 is a rounded transition. The first conical surface 9 is located close to the first exhaust port 7, and the second exhaust port 8 is connected to the first conical surface 9. The inclination angle of the first conical surface 9 is greater than that of the second conical surface 10. The arrangement of the two conical surfaces can ensure that the gas in the propellant fluid can be discharged smoothly, while controlling the distance between the diaphragm chamber 3 and the rear end of the diaphragm, avoiding unreasonable space from affecting the pumping effect. The rounded transition can reduce stress concentration and extend the service life of the diaphragm cavity 2. The first conical surface 9 and the rear view point position of the diaphragm during operation are left with an appropriate distance to ensure that the gas in the propellant fluid can be discharged smoothly from the second exhaust port 8. The second conical surface 10 keeps the vertical distance from the corresponding starting point of the diaphragm chamber 3 to the rear end face of the diaphragm within a limited range.

[0023] In this embodiment, the diaphragm chamber 3 pressure cover includes an outer pressure cover 11 and an inner pressure cover 12 that can be detachably connected. The inner pressure cover 12 extends into the diaphragm chamber 3, and the first conical surface 9 has an annular groove 13 at one end near the inner pressure cover 12. The inner pressure cover 12 directly contacts the highly corrosive slurry, while the outer pressure cover 11 does not contact the medium. The split design allows for targeted material selection. The annular groove 13 can optimize the sealing effect and fluid flow path. The inner pressure cover 12 is made of corrosion-resistant material, while the outer pressure cover 11 is made of conventional alloy steel forgings, which reduces costs while improving overall strength and safety factor. The annular groove 13 optimizes the sealing performance, reduces the risk of slurry leakage, and facilitates disassembly and maintenance.

[0024] In this embodiment, the inner pressure cover 12 is recessed at one end toward the outer pressure cover 11 to form a diaphragm chamber end face 14. The inner pressure cover 12 is provided with a feed port that connects the feed inlet 6 and the diaphragm chamber 3. The single-channel design requires the slurry to enter and exit the diaphragm chamber 3 through a single feed inlet 6 on the diaphragm cavity 2. The concave cavity design is adapted to the fluid flow requirements of the single channel, which can avoid the generation of eddies in the slurry during the flow process, improve pumping efficiency, ensure smooth slurry flow, and reduce flow resistance.

[0025] In this embodiment, the diaphragm cavity 2 is provided with a temperature measuring hole 15 that communicates with the feed inlet 6. The temperature measuring hole 15 is provided with a temperature sensor 16 for monitoring the temperature of the slurry at the feed inlet 6. The temperature sensor 16 feeds the monitoring signal back to the control system, which can be viewed in real time by the staff. They can promptly detect temperature abnormalities and take measures to ensure that the diaphragm works under the temperature tolerance, avoid rubber failure due to overheating, and extend the service life of the diaphragm.

[0026] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-temperature resistant single-channel diaphragm chamber, characterized in that: It includes a cooling pipe section, a diaphragm cavity, and a diaphragm chamber cover installed on the diaphragm cavity. The diaphragm chamber cover and the diaphragm cavity form a diaphragm chamber. The two ends of the cooling pipe section are a high-temperature slurry end and a low-temperature slurry end, respectively. The diaphragm cavity is provided with an inlet that allows the cooled slurry to enter or flow out of the diaphragm chamber from the bottom. The low-temperature slurry end is connected to the inlet on the diaphragm chamber, and the high-temperature slurry end is used to receive the undcooled slurry.

2. The high-temperature resistant single-channel diaphragm chamber according to claim 1, characterized in that: The diaphragm cavity has a first exhaust port at the top of the diaphragm chamber that communicates with the diaphragm chamber, and a second exhaust port on the side wall of the diaphragm cavity that communicates with the diaphragm chamber.

3. The high-temperature resistant single-channel diaphragm chamber according to claim 2, characterized in that: The inner wall of the diaphragm chamber is provided with an adjacent first conical surface and a second conical surface. The connection between the first conical surface and the second conical surface is a rounded transition. The first conical surface is located close to the first exhaust port, and the second exhaust port is connected to the first conical surface. The inclination angle of the first conical surface is greater than that of the second conical surface.

4. The high-temperature resistant single-channel diaphragm chamber according to claim 3, characterized in that: The diaphragm chamber cover includes an outer cover and an inner cover that can be detachably connected. The inner cover extends into the diaphragm chamber, and the first conical surface has an annular groove at one end near the inner cover.

5. A high-temperature resistant single-channel diaphragm chamber according to claim 4, characterized in that: The inner pressure cover is recessed at one end towards the outer pressure cover to form the end face of the diaphragm chamber. The inner pressure cover is provided with a feed port that connects the feed inlet and the diaphragm chamber.

6. The high-temperature resistant single-channel diaphragm chamber according to claim 1, characterized in that: The diaphragm cavity is equipped with a temperature measuring hole that communicates with the feed inlet, and a temperature sensor is installed inside the temperature measuring hole to monitor the temperature of the slurry at the feed inlet.

7. A high-temperature resistant single-channel diaphragm chamber according to claim 1, characterized in that: It also includes a pumping pipeline, with a feed valve body at one end and a discharge valve body at the other end, and the high-temperature slurry end of the cooling pipe section is connected to the pumping pipeline.

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