An explosion-proof type slurry pump system

Abstract

The present application relates to the technical field of slag slurry pump, and proposes an explosion-proof slag slurry pump system, which comprises a pump shell and an impeller assembly arranged in the pump shell, the pump shell has an inlet and an outlet, further comprises a pressure detection assembly arranged on the pump shell, the pressure detection assembly is used for detecting the pressure in the slag slurry pump, a flow limiting assembly is arranged on the pump shell, the flow limiting assembly is located at the inlet, the flow limiting assembly comprises: a plurality of swing blades which are circumferentially arranged on the inner wall of the inlet; a plurality of telescopic pieces which are circumferentially arranged on the pump shell, the telescopic pieces correspond to the swing blades one by one, and the telescopic pieces are used for driving the swing blades to swing. Through the above technical scheme, the problem that the pressure regulation of the slag slurry pump in the prior art is mostly realized by controlling the rotation speed of the slag slurry pump through electric control and then regulating the pressure is solved.

Description

Technical Field

[0001] This invention relates to the field of slurry pump technology, and more specifically, to an explosion-proof slurry pump system. Background Technology

[0002] A slurry pump is a machine that uses centrifugal force (the rotation of the pump impeller) to increase the energy of a solid-liquid mixture. Under the action of centrifugal force, the liquid is thrown from the center of the impeller to the outer edge and gains energy, leaving the outer edge of the impeller at high speed and entering the volute pump casing. In the volute pump casing, the liquid slows down due to the gradual expansion of the flow channel, converting some of its kinetic energy into static pressure energy, and finally flows into the discharge pipe at a higher pressure, delivering it to the required location. It is mainly suitable for industries such as mining, power plants, dredging, metallurgy, chemical industry, building materials, and petroleum.

[0003] Existing slurry pumps detect internal pressure using devices such as pressure sensors. If the pressure inside the slurry pump is too high, the pump speed is reduced to reduce the pressure. Adjusting the pump speed requires the cooperation of other electronic control components. Currently, there is no existing technology that adjusts the pressure by changing the size of the inlet and outlet. Summary of the Invention This invention proposes an explosion-proof slurry pump system, which solves the problem in related technologies that most slurry pump pressure regulation is achieved by electronically controlling the pump speed and thus regulating the pressure.

[0004] The technical solution of the present invention is as follows: An explosion-proof slurry pump system includes a pump casing and an impeller assembly disposed within the pump casing, the pump casing having an inlet and an outlet, and further includes; A pressure detection component is disposed on the pump casing, and the pressure detection component is used to detect the pressure inside the slurry pump; A flow-limiting component is disposed on the pump casing, the flow-limiting component is located at the inlet, and the flow-limiting component includes: Several oscillating blades are arranged circumferentially at intervals on the inner wall of the inlet. The telescopic component has several parts, which are circumferentially spaced on the pump casing. Each telescopic component corresponds to one of the swing blades, and the telescopic component is used to drive the swing blades to swing.

[0005] As a further technical solution, the pressure detection component includes: A sliding rod is slidably mounted on the pump housing, and the sliding direction of the sliding rod is to enter or leave the interior of the pump housing; A first cylinder is disposed on the pump housing. The sliding rod slides along the first cylinder. A sliding seal is formed between the sliding rod and the first cylinder. Hydraulic oil is present between the first cylinder and the sliding rod. The first cylinder is connected to the telescopic component. An elastic element is provided at both ends on the sliding rod and the first cylinder body, respectively, and the elastic element is used to provide the force for the sliding rod to slide into the pump housing.

[0006] As a further technical solution, the telescopic component includes: A second cylinder is disposed on the pump housing, and the second cylinder is connected to the first cylinder; A telescopic rod is slidably disposed within the second cylinder body, passing through the pump casing.

[0007] As a further technical solution, a plurality of the oscillating blades are arranged in a circle around the inner wall of the outlet, and the oscillating blades include: A base plate is disposed on the pump housing and abuts against the inner wall of the inlet; A swing plate is disposed at one end of the base plate away from the inside of the pump housing. The swing plate has two grooves, which are located at opposite ends of the swing plate in a direction parallel to the inlet axis.

[0008] As a further technical solution, the two grooves are located on the inner wall and outer wall of the swing plate, respectively.

[0009] As a further technical solution, it also includes: A blocking member includes a blocking portion and an extension portion. One end of the blocking portion is disposed at one end of the extension portion. Both the blocking portion and the extension portion have through holes. The two through holes are connected and communicate with the inlet. The other end of the extension portion is disposed on the substrate. The other end of the blocking portion is disposed on the pump housing. The blocking portion, the extension portion, and the pump housing form a blocking space. The swing plate is located within the blocking space.

[0010] As a further technical solution, the pressure detection components are of several kinds, all of which are disposed on the pump housing, and the pressure detection components are connected to the second cylinder.

[0011] The working principle and beneficial effects of this invention are as follows: 1. In this invention, the pressure of the slurry pump is regulated by linking the pressure detection component and the flow limiting component. The flow limiting component reduces the amount of slurry entering the slurry pump, thereby reducing the pressure of the slurry pump. 2. In this invention, the pressure detection component operates by using hydraulic oil to extend and retract the telescopic component, which in turn causes the swing plate to swing, reducing the diameter of the inlet and thus reducing the amount of slurry entering the slurry pump. 3. In this invention, the slurry is blocked by a blocking component, thus preventing slurry leakage. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial cross-sectional view of the present invention; Figure 5 For the present invention Figure 4 Enlarged view at point B in the middle; Figure 6 This is a schematic diagram of the oscillating blade structure of the present invention; In the diagram: 1. Pump casing, 2. Impeller assembly, 3. Inlet, 4. Outlet, 5. Pressure detection assembly, 6. Flow limiting assembly, 7. Swinging blade, 8. Telescopic component, 9. Sliding rod, 10. First cylinder, 11. Elastic component, 12. Second cylinder, 13. Telescopic rod, 14. Base plate, 15. Swinging plate, 16. Groove, 17. Blocking component, 18. Through hole. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0015] like Figures 1-6 As shown, this embodiment proposes... An explosion-proof slurry pump system includes a pump casing 1 and an impeller assembly 2 disposed within the pump casing 1. The pump casing 1 has an inlet 3 and an outlet 4, and also includes; Pressure detection component 5 is installed on pump casing 1 and is used to detect the pressure inside the slurry pump. The flow limiting component 6 is installed on the pump casing 1 and is located at the inlet 3. The flow limiting component 6 includes: The oscillating blades 7 are several in number and are circumferentially spaced on the inner wall of the inlet 3; There are several telescopic components 8, which are circumferentially spaced on the pump casing 1. Each telescopic component 8 corresponds to a swing blade 7. The telescopic component 8 is used to drive the swing blade 7 to swing.

[0016] In this embodiment, to achieve pressure regulation without changing the slurry pump's rotational speed, a pressure detection component 5 and a flow-limiting component 6 are installed on the slurry pump. The pressure detection component 5 detects the pressure inside the slurry pump. When the pressure is too high, the flow-limiting component 6 changes the size of the slurry pump inlet 3, thereby changing the amount of slurry entering the pump and thus changing the pump's pressure. Specifically: When the pressure detection component 5 detects that the pressure inside the slurry pump is too high, the telescopic component 8 will drive the swing blade 7 to rotate at a certain angle, which is equivalent to inserting several baffles at the inlet 3. The swing blade 7 will block the amount of slurry entering the slurry pump, thereby reducing the suction volume of the slurry pump and lowering the pressure of the slurry pump.

[0017] Furthermore, the pressure detection component 5 includes: The sliding rod 9 is slidably mounted on the pump housing 1, and the sliding direction of the sliding rod 9 is to enter or leave the interior of the pump housing 1. The first cylinder 10 is mounted on the pump housing 1. The sliding rod 9 slides along the first cylinder 10. There is a sliding seal between the sliding rod 9 and the first cylinder 10. Hydraulic oil is between the first cylinder 10 and the sliding rod 9. The first cylinder 10 is connected to the telescopic member 8. The elastic element 11 is provided at both ends on the sliding rod 9 and the first cylinder 10 respectively. The elastic element 11 is used to provide the force for the sliding rod 9 to slide into the pump housing 1.

[0018] In this embodiment, to achieve linkage between the pressure detection component 5 and the flow limiting component 6, when the pressure inside the slurry pump increases, the sliding rod 9 slides towards the inside of the first cylinder 10, and the hydraulic oil is squeezed into the telescopic member 8. The telescopic member 8 drives the swing blade 7 to move, thereby achieving linkage between the pressure detection component 5 and the flow limiting component 6. Thus, the pressure of the slurry pump can be regulated without manual operation or the intervention of electrical control components. When the pressure inside the slurry pump decreases, under the action of the elastic member 11, the sliding rod 9 will gradually enter the pump housing 1. When the elastic member 11 provides the force for the sliding rod 9 to enter the pump housing 1, the slurry at the inlet 3 will also provide the force for the swing blade 7 to reset, so the hydraulic oil will flow back into the first cylinder 10, the flow rate at the inlet 3 will increase, and the slurry pump will resume normal operation. Automatic regulation of the pressure inside the slurry pump is achieved without the need to adjust the slurry pump speed.

[0019] Furthermore, the telescopic component 8 includes: The second cylinder 12 is mounted on the pump housing 1 and is connected to the first cylinder 10. The telescopic rod 13 is slidably disposed inside the second cylinder 12, penetrating the pump housing 1.

[0020] In this embodiment, the structure of the telescopic member 8 is described. Specifically, when the sliding rod 9 enters the first cylinder 10, hydraulic oil enters the second cylinder 12 through the pipeline, which will push the telescopic rod 13 to move. The telescopic rod 13 drives the swing blade 7 to swing.

[0021] Furthermore, several oscillating blades 7 are arranged in a circle around the inner wall of the outlet 4. The oscillating blades 7 include: The base plate 14 is disposed on the pump housing 1 and abuts against the inner wall of the inlet 3; The swing plate 15 is disposed at one end of the base plate 14 away from the inside of the pump housing 1. The swing plate 15 has two grooves 16, which are located at both ends of the swing plate 15 in a direction parallel to the axis of the inlet 3.

[0022] This embodiment details the structure of the oscillating blade 7: the base plate 14 is fixedly mounted on the inner wall of the inlet 3; the oscillating plate 15 is flexibly connected to the base plate 14 and can be integrally made of a material that can be bent and reset; the telescopic rod 13 is hinged to the oscillating plate 15, and the oscillating plate 15 oscillates when the telescopic rod 13 extends or retracts. To increase the blocking effect of the oscillating plate 15, the oscillating blade 7 forms a circle at the position of the inlet 3, and the ends of two adjacent oscillating plates 15 that are close to each other have grooves 16. The two grooves 16 are staggered vertically, meaning that when the oscillating plate 15 oscillates, the two oscillating plates 15 can overlap, which can prevent slurry leakage. After all the oscillating plates 15 have oscillated, the overlap between the oscillating plates 15 reduces the diameter of the inlet 3, and at the same rotation speed, the amount of slurry entering the slurry pump decreases, and the pressure inside the slurry pump gradually decreases. Preferably, when the oscillating plate 15 is not oscillating, the ends of adjacent oscillating plates 15 abut against each other, which also prevents leakage.

[0023] Furthermore, the two grooves 16 are located on the inner and outer walls of the swing plate 15, respectively.

[0024] In this embodiment, in order to avoid excessive slurry pressure, the oscillating plate 15 of the compression part oscillates. The two grooves 16 on each oscillating plate 15 are located on the inner wall and outer wall of the oscillating plate 15, respectively. That is, each oscillating plate 15 will overlap the outer wall of the previous oscillating plate 15. When the slurry pressure is too high, since the next oscillating plate 15 presses down on the previous oscillating plate 15, the oscillating plate 15 will not move independently and will not leak.

[0025] Furthermore, it also includes: The blocking member 17 includes a blocking part and an extension part. One end of the blocking part is disposed at one end of the extension part. Both the blocking part and the extension part have through holes 18. The two through holes 18 are connected and connected to the inlet 3. The other end of the extension part is disposed on the substrate 14, and the other end of the blocking part is disposed on the pump housing 1. The blocking part, the extension part and the pump housing 1 form a blocking space. The swing plate 15 is located in the blocking space.

[0026] In this embodiment, to further ensure the sealing of the swing plate 15, a blocking space is formed by the blocking member 17, the base plate 14, and the pump casing 1. That is, when the swing plate 15 swings, it will pull the blocking member 17 to move (the blocking member 17 is preferably made of an elastic material, but it can also be a long soft material). The blocking member 17 expands, and because the blocking member 17 is integral, the slurry will not leak. Preferably, the end of the blocking part is located between the connecting flange of the slurry pump and the connecting pipe. The blocking part is fixed by the connecting flange. When the internal pressure of the slurry pump is particularly high, the swing plate 15 swings at a large angle, which will drag the blocking part to move. When the blocking part is separated from the two flanges, a gap will be formed between the two flanges, resulting in slurry leakage, which reduces the pressure of the slurry pump. Of course, at this time, the pressure inside the slurry pump is too high, thus preventing damage to the slurry pump.

[0027] Furthermore, there are several pressure detection components 5, all of which are installed on the pump housing 1, and several pressure detection components 5 are connected to the second cylinder 12.

[0028] In this embodiment, multiple pressure detection components 5 detect pressure simultaneously, making the detection more accurate and ensuring the accurate movement of the telescopic component 8.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An explosion-proof slurry pump system comprising a pump housing (1) and an impeller assembly (2) arranged in said pump housing (1), said pump housing (1) having an inlet (3) and an outlet (4), characterized in that, Also includes A pressure detection component (5) is installed on the pump casing (1), and the pressure detection component (5) is used to detect the pressure inside the slurry pump; A flow limiting component (6) is disposed on the pump casing (1), the flow limiting component (6) is located at the inlet (3), and the flow limiting component (6) includes: Multiple oscillating blades (7) are arranged circumferentially on the inner wall of the inlet (3); There are multiple telescopic components (8) arranged circumferentially on the pump casing (1). The telescopic components (8) correspond one-to-one with the swing blades (7). The telescopic components (8) are used to drive the swing blades (7) to swing. The pressure detection component (5) includes: A sliding rod (9) is slidably disposed on the pump housing (1), and the sliding direction of the sliding rod (9) is to enter or leave the interior of the pump housing (1); The first cylinder (10) is disposed on the pump housing (1), the sliding rod (9) slides along the first cylinder (10), the sliding rod (9) and the first cylinder (10) are in a sliding seal, the first cylinder (10) and the sliding rod (9) are in a hydraulic oil, and the first cylinder (10) is in communication with the telescopic member (8); An elastic element (11) is provided at both ends on the sliding rod (9) and the first cylinder (10), respectively. The elastic element (11) is used to provide the force for the sliding rod (9) to slide into the pump housing (1). The telescopic component (8) includes: The second cylinder (12) is disposed on the pump housing (1), and the second cylinder (12) is connected to the first cylinder (10); The telescopic rod (13) is slidably disposed inside the second cylinder (12) through the pump housing (1); A plurality of the aforementioned oscillating blades (7) are arranged in a circle around the inner wall of the inlet (3), and the oscillating blades (7) include: The base plate (14) is disposed on the pump housing (1) and abuts against the inner wall of the inlet (3); A swing plate (15) is disposed at one end of the base plate (14) away from the pump housing (1). The swing plate (15) and the base plate (14) are flexibly connected. The telescopic rod (13) is hinged to the swing plate (15). The two swing plates (15) are overlapped. The blocking member (17) is made of elastic material. The blocking member (17) includes a blocking part and an extension part. One end of the blocking part is disposed at one end of the extension part. Both the blocking part and the extension part have through holes (18). The two through holes (18) are connected and connected to the inlet (3). The other end of the extension part is disposed on the substrate (14). The other end of the blocking part is disposed on the pump housing (1). The blocking part, the extension part and the pump housing (1) form a blocking space. The swing plate (15) is located in the blocking space.

2. The explosion-proof slurry pump system of claim 1, wherein, The swing plate (15) has two grooves (16), which are located at the two ends of the swing plate (15) in a direction parallel to the axis of the inlet (3).

3. A flameproof slurry pump system as claimed in claim 2, wherein, Two said grooves (16) are respectively located on the inner wall and the outer wall of the swing plate (15).

4. The explosion-proof slurry pump system of claim 1, wherein, The pressure detection assembly (5) is provided with a plurality of pressure detection assemblies (5) which are arranged on the pump shell (1) and communicated with the second cylinder body (12).

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