Multi-stage chemical centrifugal pump

Abstract

The utility model discloses a multistage chemical centrifugal pump which comprises a base and further comprises a combined mechanism, the combined mechanism is installed on the top of the base, and the combined mechanism comprises a motor, a pump body, an output shaft, an end base, a connecting base, a transmission shaft and an impeller set. The motor and the pump body are installed at the top of the base, the output shaft extending into the pump body is installed at the power output end of the motor, after the impeller set is corroded and abraded due to chemical solution conveying, connection between the connecting base and the pump body can be disconnected, and the end base, the transmission shaft and the impeller set can be directly and horizontally disassembled as a whole; the impeller set can be conveniently and rapidly overhauled and maintained, bearing connecting pieces do not need to be dismantled, the number of dismantled sealing pieces is reduced, and the maintenance convenience of the centrifugal pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a multi-stage chemical centrifugal pump. Background Art

[0002] A centrifugal pump is a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. A multistage centrifugal pump is a pump that transports liquid by synchronously cooperating with multiple sets of impeller assemblies. The head of a multistage centrifugal pump can meet different requirements by changing the number of pump stages, that is, the number of impellers. Therefore, it has a wide range of applications and is widely used.

[0003] The existing centrifugal pumps have the following disadvantages when used in the chemical liquid transportation environment: the existing centrifugal pumps are affected by the corrosion of chemical solutions during the chemical liquid transportation process, especially when transporting some corrosive chemical solutions, and it is easy to cause corrosion to the internal impeller assembly, affecting the pump transportation efficiency. At the same time, due to the complicated assembly structure of the existing centrifugal pumps, the shaft seal and bearing assembly must be disassembled and assembled separately when the internal impeller is maintained and replaced, which is very troublesome and inconvenient to maintain. For this reason, we propose a multi-stage chemical centrifugal pump. Utility Model Content

[0004] The main purpose of the utility model is to provide a multi-stage chemical centrifugal pump. By means of a combined mechanism arranged on the top of the base and a combined structure, the pump body can be quickly disassembled when necessary, which facilitates the maintenance and repair of the impeller assembly with internal corrosion, and can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A multi-stage chemical centrifugal pump, comprising a base and a combined mechanism, wherein the combined mechanism is installed on the top of the base, and the combined mechanism comprises a motor, a pump body, an output shaft, an end seat, a connecting seat, a transmission shaft and an impeller group, wherein the motor and the pump body are installed on the top of the base, and the output shaft extending to the inside of the pump body is installed at the power output end of the motor, a connecting seat is arranged on one side of the end seat, and a transmission shaft inserted into the inside of the pump body is movably connected to the inside of the end seat through a bearing assembly, an impeller group is arranged on the outer periphery of the transmission shaft, and a sealing mechanism is also included, and a sealing mechanism is arranged at the connection between the pump body and the connecting seat, and the sealing mechanism The structure includes a sealing seat A, a sealing seat B, a spacer ring and a rubber ring. The sealing seat A is installed at the end of the pump body and the sealing seat B is installed at the end of the connecting seat. A spacer ring is installed on the outer periphery of the transmission shaft close to one end of the connecting seat, and a rubber ring is arranged on the outer periphery of the spacer ring, which is close to the inner wall of the pump body. When the connecting seat is connected to the end of the pump body, the sealing seat B on the side of the connecting seat is aligned with the sealing seat A and inserted into the inside of the sealing seat A. The sealing of the end connection is achieved through the cooperation of the sealing seat A and the sealing seat B. The spacer ring is inserted into the end position inside the pump body. The rubber ring can play a sealing role inside the pump body, thereby further improving the sealing performance of the centrifugal pump.

[0007] Furthermore, the end of the output shaft is installed with an internal gear sleeve located at one end inside the pump body, and the end of the transmission shaft is installed with a gear inserted into the internal gear sleeve; the output shaft and the transmission shaft are connected by the cooperation of the internal gear sleeve and the gear.

[0008] Furthermore, the interior of the connection seat and the end of the pump body are both provided with corresponding docking holes; after the connection seat is installed, fasteners can be screwed into the docking holes at the connection points to fix the end seat and the connection seat.

[0009] Furthermore, an annular groove is provided on the inner circumference of the sealing seat A, and a convex ring inserted into the annular groove is integrally formed on the surface of the sealing seat B; through the cooperation of the convex ring and the annular groove, the contact area between the sealing seats can be increased, thereby improving the sealing performance.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the motor power end is provided with an output shaft and an internal gear sleeve inserted into the pump body, the end seat is installed with the existing centrifugal pump end structure design, and bearings, shaft sleeves, glands, stuffing boxes, stuffing sleeves and other connection and sealing components are arranged inside, the end seat integrates the bearing assembly and the sealing assembly inside and is connected to the transmission shaft, and a gear is arranged at the end of the transmission shaft. When the gear is aligned with the internal gear sleeve and inserted during docking assembly, the connection between the output shaft and the transmission shaft can be achieved, and the impeller group is arranged on the outer periphery of the transmission shaft. When the chemical solution is transported, the impeller group is corroded and worn. After damage, the connection between the connecting seat and the pump body can be disconnected, and the end seat, drive shaft and impeller group can be directly removed horizontally as a whole, which is convenient and quick for the inspection and maintenance of the impeller group. There is no need to remove the bearing connector, which reduces the number of removed seals and improves the convenience of maintenance of the centrifugal pump. When the connecting seat is docked with the end of the pump body, the sealing seat B on the side of the connecting seat is aligned with the sealing seat A and inserted into the inside of the sealing seat A. The sealing of the end connection is achieved through the cooperation of the sealing seat A and the sealing seat B. The spacer ring is inserted into the end position inside the pump body. The rubber ring can play a sealing role inside the pump body, further improving the sealing of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a schematic diagram of the overall structure of a multi-stage chemical centrifugal pump.

[0012] Figure 2 The utility model is a schematic diagram of the internal structure of a multi-stage chemical centrifugal pump.

[0013] Figure 3 The utility model is a schematic diagram of the transmission shaft installation structure of a multi-stage chemical centrifugal pump.

[0014] In the figure: 1. base; 2. combined mechanism; 201. motor; 202. pump body; 203. output shaft; 204. end seat; 205. connecting seat; 206. inner gear sleeve; 207. transmission shaft; 208. gear; 209. impeller assembly; 210. docking hole; 3. sealing mechanism; 301. sealing seat A; 302. ring groove; 303. sealing seat B; 304. convex ring; 305. spacer ring; 306. rubber ring. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0016] like Figure 1-3As shown, a multi-stage chemical centrifugal pump includes a base 1 and a combined mechanism 2. The combined mechanism 2 is installed on the top of the base 1. The combined mechanism 2 includes a motor 201, a pump body 202, an output shaft 203, an end seat 204, a connecting seat 205, a transmission shaft 207 and an impeller group 209. The motor 201 and the pump body 202 are installed on the top of the base 1, and the output shaft 203 extending to the inside of the pump body 202 is installed at the power output end of the motor 201. A connecting seat 205 is provided on one side of the end seat 204, and the end of the end seat 204 is movably connected with a transmission shaft 207 inserted into the pump body 202 through a bearing assembly. The outer periphery of the transmission shaft 207 is provided with an impeller group 209, and also includes a sealing mechanism 3. The sealing mechanism 3 is provided at the connection between the pump body 202 and the connecting seat 205. The sealing mechanism 3 includes It includes a sealing seat A301, a sealing seat B303, a spacer ring 305 and a rubber ring 306. The sealing seat A301 is installed at the end of the pump body 202 and the sealing seat B303 is installed at the end of the connecting seat 205. The outer periphery of the transmission shaft 207 is installed close to one end of the connecting seat 205, and the outer periphery of the spacer ring 305 is provided with a rubber ring 306 close to the inner wall of the pump body 202; when the connecting seat 205 is connected to the end of the pump body 202, the sealing seat B303 on the side of the connecting seat 205 is aligned with the sealing seat A301 and inserted into the inside of the sealing seat A301. Through the cooperation of the sealing seat A301 and the sealing seat B303, the sealing of the end connection is achieved. The spacer ring 305 is inserted into the end position inside the pump body 202, and can play a sealing role inside the pump body 202 through the rubber ring 306, thereby further improving the sealing performance of the centrifugal pump.

[0017] Among them, the end of the output shaft 203 is installed with an internal gear sleeve 206 located at one end of the pump body 202, and the end of the transmission shaft 207 is installed with a gear 208 inserted into the internal gear sleeve 206. The inside of the connecting seat 205 and the end of the pump body 202 are both provided with docking holes 210 with corresponding positions; the output shaft 203 and the transmission shaft 207 are docked by the cooperation of the internal gear sleeve 206 and the gear 208. After the installation of the connecting seat 205 is completed, the fasteners can be screwed into the docking hole 210 at the connection to fix the end seat 204 and the connecting seat 205.

[0018] Among them, the inner circumference of the sealing seat A301 is provided with an annular groove 302, and the surface of the sealing seat B303 is integrally formed with a convex ring 304 inserted into the annular groove 302; through the cooperation between the convex ring 304 and the annular groove 302, the contact area between the sealing seats can be increased and the sealing performance can be improved.

[0019] It should be noted that the utility model is a multi-stage chemical centrifugal pump. When in use, the power end of the motor 201 is provided with an output shaft 203 and an internal gear sleeve 206 inserted into the pump body 202. The end seat 204 is installed with an existing centrifugal pump end structure design, and is provided with bearings, shaft sleeves, glands, stuffing boxes, stuffing sleeves and other connection and sealing components. The end seat 204 integrates the bearing assembly and the sealing assembly and is connected to the transmission shaft 207. The end of the transmission shaft 207 is provided with a gear 208. When the gear 208 is aligned with the internal gear sleeve 206 and inserted during docking assembly, the connection between the output shaft 203 and the transmission shaft 207 can be achieved. The impeller group 209 is arranged on the periphery of the transmission shaft 207. When the chemical solution is transported, the impeller group 209 is corroded and worn. After that, the connection between the connecting seat 205 and the pump body 202 can be disconnected, and the end seat 204, the transmission shaft 207 and the impeller group 209 can be directly disassembled horizontally as a whole, so that the impeller group 209 can be quickly and conveniently inspected and maintained without removing the bearing connector, thereby reducing the number of removed seals and improving the convenience of maintenance of the centrifugal pump; when the connecting seat 205 is docked with the end of the pump body 202, the sealing seat B303 on the side of the connecting seat 205 is aligned with the sealing seat A301 and inserted into the inside of the sealing seat A301, and the sealing of the end connection is achieved through the cooperation of the sealing seat A301 and the sealing seat B303, and the spacer ring 305 is inserted into the end position inside the pump body 202, and can play a sealing role inside the pump body 202 through the rubber ring 306, thereby further improving the sealing performance of the centrifugal pump.

[0020] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multistage chemical centrifugal pump, comprising a base (1), characterized in that: The invention also comprises a combined mechanism (2), wherein the combined mechanism (2) is installed on the top of the base (1), and the combined mechanism (2) comprises a motor (201), a pump body (202), an output shaft (203), an end seat (204), a connecting seat (205), a transmission shaft (207), and an impeller assembly (209); the motor (201) and the pump body (202) are installed on the top of the base (1), and an output shaft (203) extending into the pump body (202) is installed at the power output end of the motor (201); a connecting seat (205) is provided on one side of the end seat (204), and a transmission shaft (207) inserted into the pump body (202) is movably connected inside the end seat (204) through a bearing assembly. The transmission shaft (207) is provided with an impeller assembly (209) on its outer periphery, and also includes a sealing mechanism (3). The sealing mechanism (3) is provided at the connection between the pump body (202) and the connecting seat (205). The sealing mechanism (3) includes a sealing seat A (301), a sealing seat B (303), a spacer ring (305) and a rubber ring (306). The sealing seat A (301) is installed at the end of the pump body (202) and the sealing seat B (303) is installed at the end of the connecting seat (205). The transmission shaft (207) is provided with a spacer ring (305) at one end close to the connecting seat (205), and a rubber ring (306) is provided on the outer periphery of the spacer ring (305) and is in close contact with the inner wall of the pump body (202).

2. A multi-stage chemical centrifugal pump according to claim 1, characterized in that: The end of the output shaft (203) is mounted with an internal gear sleeve (206) located at one end inside the pump body (202), and the end of the transmission shaft (207) is mounted with a gear (208) inserted into the internal gear sleeve (206).

3. A multi-stage chemical centrifugal pump according to claim 1, characterized in that: The interior of the connection seat (205) and the end of the pump body (202) are both provided with corresponding docking holes (210).

4. A multi-stage chemical centrifugal pump according to claim 2, characterized in that: The inner circumference of the sealing seat A (301) is provided with an annular groove (302), and the surface of the sealing seat B (303) is integrally formed with a convex ring (304) inserted into the annular groove (302).

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