Explosion-proof device for slurry pump

Abstract

The present invention provides an explosion-proof device for a slurry pump, which belongs to the technical field of slurry pumps, and includes a pressure relief chamber, a wear-resistant ring, an oil outlet pipe, and a pressure relief pipe. The pressure relief chamber is arranged in the slurry pump, and the pressure relief chamber is connected with the pump chamber of the slurry pump, and the pressure relief chamber is filled with oil; the wear-resistant ring is used to block the oil from entering the pump chamber, and the wear-resistant ring can move toward both sides by means of the pressure difference on both sides, and is stuck at a preset position when moving to one side of the slurry pump; the oil outlet pipe is connected with the pressure relief chamber, and a switch valve is arranged on the oil outlet pipe; the pressure relief pipe is connected with the oil outlet pipe, and a pressure relief valve is arranged on the pressure relief pipe, and the connection point between the pressure relief pipe and the oil outlet pipe is located between the switch valve and the slurry pump. The explosion-proof device for a slurry pump provided by the present invention can smoothly release pressure and alarm when the slurry pump is blocked, and at the same time, the slurry does not flow into the oil outlet pipe, thereby avoiding the blockage of the oil outlet pipe by the slurry, ensuring the sensitivity of the device and increasing the life of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of slurry pumps, and more specifically, relates to an explosion-proof device for a slurry pump. Background Art

[0002] Slurry pump refers to a kind of machine that increases the energy of solid-liquid mixed medium by centrifugal force (rotation of the pump impeller), and converts electrical energy into kinetic energy and potential energy of the medium. It is mainly applicable to: mining, power plants, dredging, metallurgy, chemical industry, building materials and petroleum industries. Slurry pumps may have inlet and outlet blockage during use. If the pressure cannot be released in time, energy will accumulate in the pump cavity, which may easily cause pump damage, explosion, pipeline rupture and other accidents. Summary of the invention

[0003] The purpose of the present invention is to provide an explosion-proof device for a slurry pump, which aims to solve the problem that the inlet and outlet of the slurry pump may be blocked during use. If the pressure cannot be released in time, energy will accumulate in the pump cavity, which may easily cause accidents such as pump damage, explosion, and pipeline rupture.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an explosion-proof device for a slurry pump, including a pressure relief chamber, a wear-resistant ring, an oil outlet pipe, and a pressure relief pipe, the pressure relief chamber is arranged in the slurry pump, the pressure relief chamber is connected with the pump chamber of the slurry pump, and the pressure relief chamber is filled with oil; the wear-resistant ring is used to block the oil from entering the pump chamber, the wear-resistant ring can move toward both sides with the help of the pressure difference on both sides, and is stuck in a preset position when moving to one side of the slurry pump; the oil outlet pipe is connected with the pressure relief chamber, and a switch valve is provided on the oil outlet pipe; the pressure relief pipe is connected with the oil outlet pipe, and a pressure relief valve is provided on the pressure relief pipe, and the connecting point between the pressure relief pipe and the oil outlet pipe is located between the switch valve and the slurry pump.

[0005] As another embodiment of the present application, the pressure relief chamber includes a first cavity and a second cavity. The first cavity is arranged on the front guard plate of the slurry pump, the first cavity is connected with the pump cavity of the slurry pump, and a wear-resistant ring is slidably arranged in the first cavity; the second cavity is arranged on the pump cover of the slurry pump, the second cavity is connected with the first cavity, a step is provided at the connection between the second cavity and the first cavity, and the wear-resistant ring is stopped at a preset position with the help of the step.

[0006] As another embodiment of the present application, a step surface matching the step is provided on the wear-resistant ring, and the wear-resistant ring is provided with a sliding seal with the inner wall of the first cavity.

[0007] As another embodiment of the present application, a groove is provided on the outer wall of the wear-resistant ring, an O-ring is arranged in the groove, and the O-ring is in contact with the inner wall of the first cavity.

[0008] As another embodiment of the present application, an oil drain hole is provided on the pump cover, and the oil drain hole is blocked by a screw plug.

[0009] As another embodiment of the present application, a pressure gauge is provided on the pressure relief pipe.

[0010] As another embodiment of the present application, a pressure relief hole is provided on the pump cover, the pressure relief hole is connected to the pressure relief chamber, and the oil outlet pipe is clamped to the pressure relief hole through a clamping joint.

[0011] As another embodiment of the present application, a through hole is provided in the clamping joint, and two notches are provided on the side wall of the clamping joint. The pressure relief hole is a truncated cone hole, and the diameter of the large hole end of the truncated cone hole is equal to the diameter of the clamping joint. The clamping joint is squeezed into the pressure relief hole and clamped with the pressure relief hole.

[0012] As another embodiment of the present application, a sealing layer is provided on the inner wall of the pressure relief hole, and the sealing layer is elastic.

[0013] As another embodiment of the present application, a boss is provided on the outside of the pump cover, the pressure relief hole passes through the boss, an external thread is provided on the boss, an external thread is provided on the outer wall of the end of the oil outlet pipe, and the oil outlet pipe is connected to the boss by a connecting nut.

[0014] The beneficial effects of the explosion-proof device for a slurry pump provided by the present invention are as follows: compared with the prior art, the explosion-proof device for a slurry pump provided by the present invention has a pressure relief chamber arranged in the slurry pump, the pressure relief chamber is connected to the pump chamber of the slurry pump, and the pressure relief chamber is filled with oil; the wear-resistant ring is used to block the oil from entering the pump chamber, the wear-resistant ring can move toward both sides by means of the pressure difference on both sides, and is stuck at a preset position when moving toward one side of the slurry pump; the oil outlet pipe is connected to the pressure relief chamber, the pressure relief pipe is connected to the oil outlet pipe, and a pressure relief valve is arranged on the pressure relief pipe. When a blockage occurs in the slurry pump, the pressure in the pump chamber increases, the push-pull wear-resistant part moves toward the oil, and the oil is squeezed from the oil outlet pipe to the pressure relief pipe. When the pressure reaches the set value of the pressure relief valve, the pressure relief valve releases the pressure, indicating that the slurry pump is blocked and can be repaired in time. At the same time, a wear-resistant ring is arranged between the oil and the slurry. Due to the interval of the wear-resistant ring, the slurry does not flow into the oil outlet pipe when the pressure is released, thus avoiding the blockage of the oil outlet pipe by the slurry, ensuring the sensitivity of the device, improving the life of the device, and effectively preventing the pipeline rupture, component damage and explosion accidents of the slurry pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic structural diagram of a slurry pump explosion-proof device provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a card connector used in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of a pump cover used in an embodiment of the present invention;

[0019] Figure 4 for Figure 3 Cross-sectional structure diagram along line AA.

[0020] In the figure: 1. switch valve; 2. oil outlet pipe; 3. pressure relief valve; 4. pressure relief pipe; 5. pressure relief hole; 6. oil; 7. pump cover; 8. front guard plate; 9. O-ring; 10. screw plug; 11. wear-resistant ring; 12. pressure gauge; 13. connecting nut; 14. clamping joint; 16. boss; 18. notch; 19. second cavity. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Please also read Figure 1 , the explosion-proof device for a slurry pump provided by the present invention is now described. The explosion-proof device for a slurry pump comprises a pressure relief chamber, a wear-resistant ring 11, an oil outlet pipe 2, and a pressure relief pipe 4. The pressure relief chamber is arranged in the slurry pump and is connected with the pump chamber of the slurry pump; the pressure relief chamber is filled with oil 6; the wear-resistant ring 11 is used to block the oil 6 from entering the pump chamber, and the wear-resistant ring 11 can move toward both sides by means of the pressure difference on both sides, and is stuck at a preset position when moving toward one side of the slurry pump; the oil outlet pipe 2 is connected to the pressure relief chamber, and a switch valve 1 is arranged on the oil outlet pipe 2; the pressure relief pipe 4 is connected to the oil outlet pipe 2, and a pressure relief valve 3 is arranged on the pressure relief pipe 4, and the connection point between the pressure relief pipe 4 and the oil outlet pipe 2 is located between the switch valve 1 and the slurry pump.

[0023] Compared with the prior art, the explosion-proof device for a slurry pump provided by the present invention has a pressure relief chamber arranged in the slurry pump and connected to the pump chamber of the slurry pump; the pressure relief chamber is filled with oil 6; the wear-resistant ring 11 is used to block the oil 6 from entering the pump chamber, and the wear-resistant ring 11 can move toward both sides by means of the pressure difference on both sides, and is stuck at a preset position when moving toward one side of the slurry pump; the oil outlet pipe 2 is connected to the pressure relief chamber, and the pressure relief pipe 4 is connected to the oil outlet pipe 2, and a pressure relief valve 3 is arranged on the pressure relief pipe 4. When a blockage occurs in the slurry pump, the pressure in the pump chamber increases, and the wear-resistant ring 11 is pushed to move toward the oil 6, squeezing the oil 6 from the oil outlet pipe 2 to the pressure relief pipe 4. When the pressure reaches the set value of the pressure relief valve 3, the pressure relief valve 3 releases the pressure, indicating that the slurry pump is blocked and can be repaired in time. At the same time, a wear-resistant ring 11 is arranged between the oil 6 and the slurry. Due to the interval of the wear-resistant ring 11, the slurry does not flow into the oil outlet pipe 2 when the pressure is released, thereby avoiding the blockage of the oil outlet pipe 2 by the slurry, ensuring the sensitivity of the device, improving the life of the device, and effectively preventing the pipeline rupture, component damage and explosion accidents of the slurry pump.

[0024] In this embodiment, the wear-resistant ring 11 is stuck at the preset position when it moves to one side of the slurry pump; when the slurry pump is not blocked, under the pressure of the oil 6, the wear-resistant ring 11 is fixed at the preset position, and the oil 6 is set in the pressure relief chamber and does not flow. When the slurry pump is blocked, the pressure in the pump chamber will continue to increase. When the pressure in the pump propeller is greater than the pressure of the oil 6, the wear-resistant ring 11 squeezes the oil 6 back into the oil outlet pipe 2. Because the switch valve 1 on the oil outlet pipe 2 is closed, the oil 6 can only flow to the pressure relief pipe 4. When the pressure reaches the set value of the pressure relief valve 3, the pressure relief valve 3 releases the pressure to avoid blocking the slurry pump and to carry out maintenance in time.

[0025] As a specific implementation of the slurry pump explosion-proof device provided by the present invention, please refer to Figure 1 The pressure relief chamber includes a first cavity and a second cavity 19. The first cavity is arranged on the front guard plate 8 of the slurry pump, and the first cavity is communicated with the pump cavity of the slurry pump. The wear-resistant ring 11 is slidably arranged in the first cavity; the second cavity 19 is arranged on the pump cover 7 of the slurry pump, and the second cavity 19 is communicated with the first cavity. A step is arranged at the connection between the second cavity 19 and the first cavity, and the wear-resistant ring 11 is stopped at a preset position by means of the step.

[0026] In this embodiment, because a step is provided at the junction of the second cavity 19 and the first cavity, the shape of the wear-resistant ring 11 is reasonably designed to prevent the wear-resistant ring 11 from entering the pump cavity, and the step is the preset position.

[0027] As a specific implementation of the embodiment of the present invention, please refer to Figures 1 to 4 The wear-resistant ring 11 is provided with a step surface matched with the step, and the wear-resistant ring 11 is arranged to slide and seal with the inner wall of the first cavity.

[0028] In this embodiment, one end of the wear-resistant ring 11 is inserted into the first cavity and can slide along the thickness direction of the first cavity. At the same time, a step surface is provided on the wear-resistant ring 11. When the slurry pump is not blocked and the free space of the pressure relief cavity is filled with oil 6, the step surface of the wear-resistant ring 11 overlaps with the step at the junction of the second cavity 19 and the first cavity. Under the pressure of the oil 6, the step surface of the wear-resistant ring 11 is close to the step. When the pressure in the pump cavity is greater than the pressure of the oil 6, the wear-resistant ring 11 slides along the first cavity to squeeze the oil 6. Because the end of the wear-resistant ring 11 inserted into the first cavity matches the specifications of the first cavity, during the movement, the wear-resistant ring 11 always separates the slurry from the oil 6, and the slurry cannot enter the oil outlet pipe 2, which effectively prevents the oil outlet pipe 2 and the pressure relief pipe 4 from being blocked, and ensures the sensitivity and accuracy of the entire device.

[0029] As a specific implementation of the embodiment of the present invention, refer to Figure 1 A groove is provided on the outer wall of the wear-resistant ring 11, an O-ring 9 is arranged in the groove, and the O-ring 9 contacts the inner wall of the first cavity.

[0030] In this embodiment, an O-ring 9 is provided to ensure sealing performance and better prevent the slurry in the pump chamber from moving to the pressure relief chamber.

[0031] As a specific implementation of the embodiment of the present invention, please refer to Figure 1 The pump cover 7 is provided with an oil drain hole, which is blocked by a screw plug 10.

[0032] In this embodiment, when the oil needs to be drained due to various reasons such as maintenance, the screw plug 10 is opened to release the oil 6.

[0033] As a specific implementation of the embodiment of the present invention, please refer to Figure 1 A pressure gauge 12 is provided on the pressure relief pipe 4.

[0034] In this embodiment, when the switch valve 1 is opened, oil can be injected into the pressure relief chamber through the oil outlet pipe 2. Because the pressure relief pipe 4 is arranged between the slurry pump and the switch valve 1, the pressure gauge 12 can accurately observe the pressure of the oil 6 in the pressure relief pump.

[0035] As a specific implementation of the embodiment of the present invention, please refer to Figure 3 to Figure 4 A pressure relief hole 5 is provided on the pump cover 7 , the pressure relief hole 5 is connected to the pressure relief chamber, and the oil outlet pipe 2 is connected to the pressure relief hole 5 through a clamping joint 14 .

[0036] In this embodiment, the oil outlet pipe 2 and the pressure relief hole 5 are connected by snap-fitting, which is convenient and quick to install.

[0037] As a specific implementation of the embodiment of the present invention, please refer to Figure 3 to Figure 4 A through hole is provided in the clamping joint 14, and two notches 18 are provided on the side wall of the clamping joint 14. The pressure relief hole 5 is a truncated cone hole, and the aperture of the large hole end of the truncated cone hole is equal to the diameter of the clamping joint 14. The clamping joint 14 is squeezed into the pressure relief hole 5 and clamped with the pressure relief hole 5.

[0038] In this embodiment, two notches 18 are provided on the side wall of the clamping joint 14, so that the clamping joint 14 can be deformed under the effect of extrusion. Also, because the pressure relief hole 5 is a truncated cone hole, the diameter of the large hole end of the truncated cone hole is equal to the diameter of the clamping joint 14. When the clamping joint 14 is inserted into the pressure relief hole 5, it is squeezed and deformed under the effect of the pressure relief hole 5, so that the clamping joint 14 is closely attached to the inner wall of the pressure relief hole 5, and the clamping is realized.

[0039] As a specific implementation of the embodiment of the present invention, please refer to Figure 3 to Figure 4 A sealing layer is provided on the inner wall of the pressure relief hole 5, and the sealing layer is elastic.

[0040] In this embodiment, the sealing layer can be a rubber layer. When the card joint 14 is inserted into the pressure relief hole 5, the rubber layer fits better with the card joint 14. At the same time, the rubber layer can be squeezed into the notch 18 of the card joint 14 to ensure the sealing performance.

[0041] As a specific implementation of the embodiment of the present invention, please refer to Figure 3 to Figure 4 A boss 16 is provided on the outer side of the pump cover 7 , the pressure relief hole 5 passes through the boss 16 , an external thread is provided on the boss 16 , an external thread is provided on the outer wall of the end of the oil outlet pipe 2 , and the oil outlet pipe 2 is connected to the boss 16 through a connecting nut 13 .

[0042] In this embodiment, when the clamping joint 14 is inserted into the pressure relief hole 5, the connecting nut 13 threadedly connected on the oil outlet pipe 2 is rotated, so that the connecting nut 13 is connected to the boss 16 and the oil outlet pipe 2 at the same time. The double connection of the clamping joint and the connecting nut 13 makes the seal more stable, avoiding the accuracy of the entire device due to leakage of the oil 6.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Explosion-proof device for slurry pump, characterized in that: include: A pressure relief chamber is provided in the slurry pump and is connected to the pump chamber of the slurry pump, and the pressure relief chamber is filled with oil; A wear-resistant ring, used to block the oil from entering the pump cavity, the wear-resistant ring can move toward both sides by means of the pressure difference on both sides, and is stuck at a preset position when moving toward one side of the slurry pump; An oil outlet pipe connected to the pressure relief chamber, wherein a switch valve is provided on the oil outlet pipe; A pressure relief pipe connected to the oil outlet pipe, a pressure relief valve is provided on the pressure relief pipe, and the connecting point between the pressure relief pipe and the oil outlet pipe is located between the switch valve and the slurry pump; A first cavity is provided on the front guard plate of the slurry pump, the first cavity is communicated with the pump cavity of the slurry pump, and the wear-resistant ring is slidably provided in the first cavity; as well as A second cavity is provided on the pump cover of the slurry pump, the second cavity is connected with the first cavity, a step is provided at the junction of the second cavity and the first cavity, and the wear-resistant ring is stopped at a preset position by means of the step; The pump cover is provided with an oil drain hole, which is blocked by a screw plug; The pressure relief pipe is provided with a pressure gauge.

2. The explosion-proof device for a slurry pump according to claim 1, characterized in that: The wear-resistant ring is provided with a step surface matched with the step, and the wear-resistant ring is arranged to slide and seal with the inner wall of the first cavity.

3. The explosion-proof device for a slurry pump according to claim 2, characterized in that: A groove is provided on the outer wall of the wear-resistant ring, an O-ring is arranged in the groove, and the O-ring contacts the inner wall of the first cavity.

4. The explosion-proof device for a slurry pump according to claim 1, characterized in that: The pump cover is provided with a pressure relief hole, the pressure relief hole is connected to the pressure relief chamber, and the oil outlet pipe is clamped with the pressure relief hole through a clamping joint.

5. The explosion-proof device for a slurry pump according to claim 4, characterized in that: A through hole is provided in the clamping joint, and two notches are provided on the side wall of the clamping joint. The pressure relief hole is a truncated cone hole, and the diameter of the large hole end of the truncated cone hole is equal to the diameter of the clamping joint. The clamping joint is squeezed into the pressure relief hole and clamped with the pressure relief hole.

6. The explosion-proof device for a slurry pump according to claim 5, characterized in that: The inner wall of the pressure relief hole is provided with a sealing layer, and the sealing layer is elastic.

7. The explosion-proof device for a slurry pump according to claim 6, characterized in that: A boss is arranged on the outside of the pump cover, the pressure relief hole passes through the boss, an external thread is arranged on the boss, an external thread is arranged on the outer wall of the end of the oil outlet pipe, and the oil outlet pipe is connected to the boss through a connecting nut.

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