High-sealing-performance chemical pump convenient to maintain

Abstract

The invention relates to the technical field of water pumping equipment, in particular to a convenient-to-maintain high-sealing chemical pump which comprises a centrifugal pump body, a water inlet pipe, a water outlet pipe, an impeller and the like. The centrifugal pump body is fixedly connected with a water inlet pipe; the centrifugal pump body is fixedly connected with a water outlet pipe; and an impeller is connected in the centrifugal pump body. In the process that waste water enters the centrifugal pump body, long fibers in the waste water are intercepted through the first filter screen, and the long fibers above the second filter screen are gradually crushed through the crushing blades, so that the long fibers can be driven by water flow to penetrate through the second filter screen, continuous accumulation of the long fibers on the first filter screen and the second filter screen is effectively avoided, and the service life of the waste water is prolonged. And the long fibers in the isolation barrel and the fixing barrel are blocked through the isolation barrel with the upper side in a necking shape, the difficulty that the long fibers are separated from an opening in the upper side of the isolation barrel is effectively increased, and then the crushing effect of the crushing blades on the long fibers is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of water pumping equipment, and in particular to a highly sealed chemical pump that is easy to maintain. Background Art

[0002] Chemical pumps are widely used in industry, urban water supply, drainage, etc. When papermaking wastewater is extracted by chemical centrifugal pumps, since the papermaking wastewater often contains a large amount of impurities such as fibers, paper scraps, and sand, these impurities can easily block the connecting pipes of the centrifugal pump or entangle with the impeller, resulting in a decrease in the flow rate and lift of the centrifugal pump, or even failure to work normally.

[0003] The existing treatment method usually adopts a filter screen set at the inlet of the centrifugal pump to filter the water inlet, but impurities will continue to accumulate at the filter screen, affecting the flow rate of the centrifugal pump, so that the operator needs to regularly clean the filter screen at the inlet of the centrifugal pump to ensure the normal operation of the centrifugal pump, which is very troublesome. Summary of the invention

[0004] In order to overcome the disadvantage that a filter screen is provided at the inlet of a centrifugal pump to filter the water inlet, impurities will continue to accumulate at the filter screen, affecting the flow rate of the centrifugal pump, the present invention provides a highly sealed chemical pump that is easy to maintain.

[0005] Technical solution: A highly sealed chemical pump that is easy to maintain, comprising a centrifugal pump body, an inlet pipe, an outlet pipe and an impeller; the inlet pipe is fixedly connected to the centrifugal pump body; the outlet pipe is fixedly connected to the centrifugal pump body; the impeller is connected to the centrifugal pump body; it also comprises a first filter screen, an isolation cylinder, a fixed cylinder, a second filter screen and a crushing blade; the first filter screen is fixedly connected to the inlet pipe; the isolation cylinder is fixedly connected to the first filter screen; the fixed cylinder is fixedly connected to the isolation cylinder; the second filter screen is fixedly connected to the fixed cylinder; a number of crushing blades are fixedly connected to the impeller via a connecting rod, the connecting rod passes through the second filter screen, and the crushing blades fit the second filter screen.

[0006] Furthermore, it is particularly preferred that the isolation tube be shaped into an upper constricted shape.

[0007] Furthermore, it is particularly preferred that the first filter screen is in the shape of an inverted truncated cone.

[0008] In addition, it is particularly preferred that the isolation cylinder is made of a deformable material and a plurality of ribs are provided on the isolation cylinder.

[0009] In addition, it is particularly preferred that a mechanical seal is further included; the centrifugal pump body and the impeller are jointly connected with a mechanical seal.

[0010] Furthermore, it is particularly preferred that the impeller surface is coated with a wear-resistant coating.

[0011] Furthermore, it is particularly preferred that a sealing rubber ring is provided at the connection between the centrifugal pump body and the pump casing.

[0012] In addition, it is particularly preferred that a plurality of through openings are opened on the fixed cylinder, a filter screen is arranged in each through opening, and the through opening is located above the second filter screen.

[0013] In addition, it is particularly preferred that a paddle is further included; each crushing blade is fixedly connected with a paddle, and the paddle is flush with the through opening.

[0014] Furthermore, it is particularly preferred that the paddle is arranged obliquely.

[0015] Beneficial effects: The present invention achieves that in the process of wastewater entering the centrifugal pump body, the longer fibers in the wastewater are intercepted by the first filter screen, and the long fibers above the second filter screen are gradually broken by the crushing blade, so that the long fibers can pass through the second filter screen driven by the water flow, thereby effectively avoiding the continuous accumulation of the long fibers on the first filter screen and the second filter screen, effectively facilitating maintenance, and blocking the long fibers inside the isolation cylinder and the fixed cylinder through the isolation cylinder with a constricted upper opening, effectively increasing the difficulty of the long fibers to detach from the upper opening of the isolation cylinder, thereby ensuring the crushing effect of the crushing blade on the long fibers;

[0016] When a large number of long fibers are accumulated inside the isolation cylinder and the fixed cylinder, it is difficult for the water flow to pass through the isolation cylinder, and the suction force of the impeller remains unchanged, so that the water flow speed passing through the first filter is accelerated, that is, the water flow speed outside the isolation cylinder is accelerated, and then according to the Bernoulli principle, the deformable isolation cylinder is squeezed outward by the water to expand, so that the volume inside the isolation cylinder is expanded, and the gaps between the fibers are increased, and then the water flow can pass through the isolation cylinder to quickly carry away the broken fibers, thereby avoiding the continuous accumulation of a large number of long fibers inside the isolation cylinder and the fixed cylinder, affecting the suction effect of the centrifugal pump body on the wastewater;

[0017] After the long fibers on the upper side of the second filter are broken by the breaking blade, the wastewater outside the fixed cylinder can flow into the fixed cylinder through the opening, driving the broken fibers to pass through the second filter, effectively ensuring the breaking efficiency of the fibers by the breaking blade, and in this process, the fibers on the inside of the opening are continuously pushed away by the paddle to create a buffer area, ensuring that the wastewater can flow into the fixed cylinder through the opening to prevent the long fibers from blocking the opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a highly sealed chemical pump that is easy to maintain according to the present invention;

[0019] Figure 2 It is a combined cross-sectional view of the centrifugal pump body and the water inlet pipe of the present invention;

[0020] Figure 3 It is a cross-sectional view of the isolation tube of the present invention;

[0021] Figure 4 A state diagram of the isolation tube of the present invention being expanded;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the mechanical seal of the present invention.

[0023] In the figure: 1-centrifugal pump body, 2-water inlet pipe, 3-water outlet pipe, 4-impeller, 5-first filter screen, 6-isolation cylinder, 6001-rib, 7-fixing cylinder, 7001-port, 8-second filter screen, 9-crushing blade, 10-mechanical seal, 101-paddle. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0025] Example 1

[0026] A highly sealed chemical pump that is easy to maintain, such as Figure 1-Figure 5 As shown, it includes a centrifugal pump body 1, a water inlet pipe 2, a water outlet pipe 3 and an impeller 4; the water inlet pipe 2 is fixedly connected to the centrifugal pump body 1; the water outlet pipe 3 is fixedly connected to the centrifugal pump body 1; the impeller 4 is connected inside the centrifugal pump body 1;

[0027] It also includes a first filter screen 5, an isolation cylinder 6, a fixed cylinder 7, a second filter screen 8 and a crushing blade 9; the first filter screen 5 is fixedly connected to the water inlet pipe 2; the isolation cylinder 6 is fixedly connected to the middle of the first filter screen 5; the fixed cylinder 7 is fixedly connected to the lower side of the isolation cylinder 6; the second filter screen 8 is fixedly connected to the fixed cylinder 7; four crushing blades 9 are fixedly connected to the impeller 4 through a connecting rod, the connecting rod passes through the second filter screen 8, and the crushing blades 9 are in contact with the second filter screen 8.

[0028] The shape of the isolation tube 6 is set to be tapered on the upper side to increase the difficulty of the long fibers inside the isolation tube 6 and the fixed tube 7 moving upward.

[0029] The first filter screen 5 is in the shape of an inverted truncated cone, and the long fibers are guided by the inclined surface of the first filter screen 5 .

[0030] The isolation tube 6 is made of a deformable material, and is provided with a plurality of ribs 6001 , which are used to keep the isolation tube 6 in an upper contracted shape.

[0031] A mechanical seal 10 is also included; the centrifugal pump body 1 and the impeller 4 are connected together with the mechanical seal 10 .

[0032] The surface of the impeller 4 is coated with a wear-resistant coating to enhance the wear resistance of the impeller 4 .

[0033] A sealing rubber ring is provided at the connection between the pump casing and the centrifugal pump body 1 to enhance the sealing performance of the centrifugal pump body 1 .

[0034] When in use, the water pipe connected to the water inlet pipe 2 is placed in the wastewater pool, and then the motor in the centrifugal pump body 1 drives the impeller 4 to rotate, so that the wastewater in the wastewater pool is transported to the designated location through the suction force generated by the impeller 4. During this process, the wastewater enters the centrifugal pump body 1 from the water inlet pipe 2, and then flows out from the water outlet pipe 3 driven by the impeller 4. During this process, the pump shaft of the impeller 4 is sealed by the mechanical seal 10, and in order to prevent the fiber impurities in the wastewater from clogging the pipeline or entangled with the impeller 4 in the longer conveying pipeline, during the process of the wastewater entering the centrifugal pump body 1, the wastewater and the shorter fibers in the wastewater can normally pass through the first filter screen 5 and enter the centrifugal pump body 1 to be pumped away, while the longer fibers in the wastewater are intercepted by the first filter screen 5, thereby preventing the longer fibers in the wastewater from entering the centrifugal pump body 1 In order to prevent the long fibers from continuously accumulating on the upper side of the first filter screen 5 and affecting the flow of water, the long fibers can flow along the inclined surface of the first filter screen 5 to the middle of the first filter screen 5, and then flow to the inside of the isolation cylinder 6 and the fixed cylinder 7, and the impeller 4 drives the crushing blade 9 to rotate, and the crushing blade 9 gradually breaks the long fibers above the second filter screen 8, so that they can pass through the second filter screen 8 driven by the water flow, effectively preventing the fibers from continuously accumulating on the first filter screen 5 and affecting the flow of wastewater, and driving the long fibers to the isolation cylinder 6 and the fixed cylinder 7 for treatment through the water flow, effectively ensuring that the wastewater can pass through the first filter screen 5 quickly, so as to ensure the impeller 4's ability to suck wastewater, thereby intercepting the long fibers in the wastewater through the first filter screen 5 and the second filter screen 8, preventing the long fiber impurities in the wastewater from clogging the pipeline or entangled with the impeller 4, and effectively facilitating maintenance.

[0035] It should be noted that when the fibers are broken by the breaking blade 9, the wastewater and fibers inside the isolation cylinder 6 and the fixed cylinder 7 will be disturbed at the same time, which may easily cause some fibers to be disturbed by the breaking blade 9 and move upward to separate from the isolation cylinder 6, and then flow to the upper side of the first filter 5, thereby affecting the breaking effect of the breaking blade 9 on the fibers. Therefore, the fibers inside the isolation cylinder 6 and the fixed cylinder 7 are blocked by the isolation cylinder 6 with a tapered opening on the upper side, effectively increasing the difficulty of the fibers to separate from the upper opening of the isolation cylinder 6, thereby ensuring the breaking effect of the breaking blade 9 on the fibers.

[0036] At a certain moment, when the wastewater pumped into the water inlet pipe 2 contains more clumped fibers, more fibers will enter the isolation tube 6 and the fixed tube 7 at one time. At this time, due to the presence of more fibers in the isolation tube 6 and the fixed tube 7, the water flow into the isolation tube 6 and the fixed tube 7 is seriously affected, and the water flow cannot take away the fibers that have been broken by the breaking blade 9 in time, causing the fibers to continue to accumulate in the isolation tube 6 and the fixed tube 7. Therefore, when more fibers are accumulated in the isolation tube 6 and the fixed tube 7, it is difficult for the water flow to pass through the isolation tube 6, and the suction force of the impeller 4 remains unchanged, so that the water flow speed passing through the first filter screen 5 is accelerated, that is, the water flow speed outside the isolation tube 6 is accelerated, and then according to the Bernoulli principle, as Figure 4 As shown, the deformable isolation cylinder 6 is squeezed and expanded outward by water, thereby expanding the volume inside the isolation cylinder 6 and increasing the gaps between the long fibers. Then, the water flow can pass through the first filter screen 5 to quickly carry away the broken fibers, thereby avoiding the continuous accumulation of a large number of long fibers inside the isolation cylinder 6 and the fixed cylinder 7, which affects the suction effect of the centrifugal pump body 1 on the wastewater. After the water flow quickly carries away the broken fibers, the isolation cylinder 6 is driven to reset through the ribs 6001.

[0037] Example 2

[0038] On the basis of Example 1, Figure 2-Figure 4 As shown, four through openings 7001 are opened on the fixed cylinder 7 , and a filter screen is arranged in each through opening 7001 . The through opening 7001 is located above the second filter screen 8 .

[0039] It also includes a paddle 101 ; each crushing blade 9 is fixedly connected with a paddle 101 , and the paddle 101 is flush with the through opening 7001 .

[0040] The paddle 101 is arranged at an angle so as to guide and push the fibers inside the through opening 7001 inwardly.

[0041] In order to further ensure that the water flow can quickly carry away the broken fibers, after the long fibers on the upper side of the second filter 8 are broken by the breaking blade 9, the wastewater outside the fixed cylinder 7 can flow into the fixed cylinder 7 through the opening 7001, driving the broken fibers to pass through the second filter 8, effectively ensuring the breaking efficiency of the fibers by the breaking blade 9, and in this process, the breaking blade 9 drives the paddle 101 to rotate, so that the long fibers on the inside of the opening 7001 are continuously pushed away by the paddle 101 to create a buffer area, ensuring that the wastewater can flow into the fixed cylinder 7 through the opening 7001, preventing the long fibers from blocking the opening 7001, and at the same time, the long fibers in the fixed cylinder 7 are intercepted by the filter screen set at the opening 7001, preventing the uncrushed fibers from passing through the opening 7001 and being sucked away.

[0042] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A highly sealed chemical pump that is easy to maintain, comprising a centrifugal pump body (1), a water inlet pipe (2), a water outlet pipe (3) and an impeller (4); the centrifugal pump body (1) is fixedly connected with the water inlet pipe (2); the centrifugal pump body (1) is fixedly connected with the water outlet pipe (3); the centrifugal pump body (1) is connected with the impeller (4); the centrifugal pump body (1) is characterized in that: It also comprises a first filter screen (5), an isolating cylinder (6), a fixing cylinder (7), a second filter screen (8) and a crushing blade (9); the first filter screen (5) is fixedly connected inside the water inlet pipe (2); the isolating cylinder (6) is fixedly connected to the first filter screen (5); the fixing cylinder (7) is fixedly connected to the isolating cylinder (6); the second filter screen (8) is fixedly connected inside the fixing cylinder (7); a plurality of crushing blades (9) are fixedly connected to the impeller (4) via a connecting rod, the connecting rod passes through the second filter screen (8), and the crushing blades (9) are in close contact with the second filter screen (8).

2. The highly sealable chemical pump that is easy to maintain according to claim 1 is characterized in that: The isolation tube (6) is configured to have an upper side contracted shape.

3. The highly sealable chemical pump that is easy to maintain according to claim 1 is characterized in that: The first filter screen (5) is in the shape of an inverted truncated cone.

4. The highly sealable chemical pump that is easy to maintain according to claim 2 is characterized in that: The isolation cylinder (6) is made of a deformable material, and a plurality of ribs (6001) are arranged on the isolation cylinder (6).

5. The highly sealable chemical pump that is easy to maintain according to claim 1 is characterized in that: It also includes a mechanical seal (10); the mechanical seal (10) is commonly connected between the centrifugal pump body (1) and the impeller (4).

6. The highly sealable chemical pump that is easy to maintain according to claim 1 is characterized in that: The surface of the impeller (4) is coated with a wear-resistant coating.

7. The highly sealable chemical pump that is easy to maintain according to claim 5 is characterized in that: A sealing rubber ring is provided at the pump casing connection of the centrifugal pump body (1).

8. The highly sealable chemical pump that is easy to maintain according to claim 1 is characterized in that: The fixed cylinder (7) is provided with a plurality of through openings (7001), each of which is provided with a filter screen, and the through openings (7001) are located above the second filter screen (8).

9. The highly sealable chemical pump that is easy to maintain according to claim 8 is characterized in that: It also includes a paddle (101); each crushing blade (9) is fixedly connected with a paddle (101), and the paddle (101) is flush with the through opening (7001).

10. The highly sealable chemical pump that is easy to maintain according to claim 9 is characterized in that: The paddle (101) is arranged in an inclined manner.

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