Vertical pipeline pump with rigid coupler

Abstract

The vertical pipeline pump with the rigid coupler comprises a pump body, an impeller, the rigid coupler and a motor, a clamping block is arranged on an output shaft of the motor, and a clamping groove is formed in the inner side wall of the rigid coupler. A motor support is arranged on the pump body, a motor is arranged on the motor support, an output shaft of the motor is connected with one end of a pump shaft through a rigid coupler, the other end of the pump shaft is connected with an impeller, the impeller is arranged in the pump body, a shaft sleeve is sleeved on the pump shaft above the impeller, and a mechanical seal is arranged on the pump shaft above the shaft sleeve. A mechanical seal end cover is arranged on the pump shaft above the mechanical seal, a pump cover is arranged between the mechanical seal end cover and the pump body, and an outlet of the pump body is provided with a flushing pipe communicated to the mechanical seal; according to the utility model, the clamping groove and the clamping block with the required lifting height are prefabricated, so that the rigid coupling is more convenient and accurate to mount.

Description

Technical Field

[0001] The utility model belongs to the technical field of vertical pipeline pumps, and in particular relates to a vertical pipeline pump with a rigid coupling. Background Art

[0002] The vertical pipeline pump is composed of five parts: impeller, pump body, extended shaft motor, coupling and mechanical seal. Since the mechanical seal is in the high-pressure area of ​​the vertical pipeline pump, impurities in the conveying liquid can easily enter the surface of the mechanical seal, thereby increasing the loss of the mechanical seal during the high-speed friction process. Once the mechanical seal is damaged, it will cause problems such as water leakage in the pipeline pump, making the mechanical seal need to be frequently inspected and replaced.

[0003] The vertical pipeline pump structure in which the motor shaft and the pump shaft are connected by a rigid coupling is widely used because of its easy disassembly and assembly, and it is more convenient to inspect and replace the mechanical seal. However, the mechanical seal has high precision and strict requirements for disassembly and assembly. After removing the mechanical seal, the impeller will fall to the bottom of the pump body due to gravity. After the mechanical seal is installed on the impeller shaft, in order to avoid the bottoming out of the impeller and causing dry wear, the impeller shaft needs to be lifted up, a gasket is inserted between the impeller shaft and the pump cover, and then the bolts of the rigid coupling are tightened and the gasket is removed to complete the installation. In an installation environment without a gasket, the impeller shaft needs to be manually lifted to the highest point, then lowered to 1 / 3 of the height, and the bolts of the rigid coupling are tightened. This operation is very dependent on the operating accuracy of the installer. Lowering the height too much will cause impeller wear, and lowering the height too low may cause wear between the upper end of the impeller and the pump cover.

[0004] Patent CN2538993Y discloses a vertical detachable pipeline pump. By setting an extended shaft motor and a coupling frame, the extended shaft of the motor is connected to the impeller shaft with a splint coupling. The seal can be easily replaced by removing the splint coupling. After replacing the seal, this solution still requires lifting the impeller shaft upward to avoid dry wear caused by contact between the bottom of the impeller and the pump body.

[0005] Therefore, there is no vertical pipeline pump with a rigid coupling that can easily and accurately install the coupling after removing the coupling and checking and replacing the mechanical seal. Utility Model Content

[0006] In order to solve the problem of how to conveniently and accurately install a rigid coupling when repairing or replacing a mechanical seal of a vertical pipeline pump, the utility model provides a vertical pipeline pump with a rigid coupling.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A vertical pipeline pump with a rigid coupling comprises a pump body, an impeller, a rigid coupling and a motor, a clamping block is arranged on the output shaft of the motor, and a clamping groove is arranged on the inner side wall of the rigid coupling;

[0009] A motor bracket is arranged on the pump body, a motor is arranged on the motor bracket, an output shaft of the motor and one end of a pump shaft are connected through a rigid coupling, the other end of the pump shaft is connected to an impeller, the impeller is arranged in the pump body, a shaft sleeve is arranged on the pump shaft above the impeller, a mechanical seal is arranged on the pump shaft above the shaft sleeve, a machine seal end cover is arranged on the pump shaft above the mechanical seal, a pump cover is arranged between the machine seal end cover and the pump body, a flushing pipe is arranged at the pump body outlet to connect to the mechanical seal.

[0010] Furthermore, two clamping blocks are symmetrically arranged at the lower end of the side surface of the output shaft of the motor.

[0011] Furthermore, the shape of the card block is a right-angled trapezoid, and the hypotenuse of the card block faces upward.

[0012] Furthermore, the bevel angle at one end of the block bevel with a higher bevel is arranged parallel to the plane of the block ground.

[0013] Furthermore, the clamping slot is composed of a lifting slot arranged at the center of the upper end of the rigid coupling and a sliding slot connected to the left side of the lifting slot.

[0014] Furthermore, the upper end of the lifting groove matches the shape of the card block, and the lower end is a rectangular groove with the same height as the card block.

[0015] Furthermore, the sliding groove and the lifting groove have the same shape, and the height of the sliding groove is lower than that of the lifting groove.

[0016] Furthermore, the difference between the highest points of the sliding groove and the lifting groove is the required lifting height of the pump shaft.

[0017] Beneficial effects of the utility model:

[0018] (1) The utility model provides a slot on the inner wall of the rigid coupling and blocks on both sides of the output shaft of the motor, so that the vertical pipeline pump of the utility model is more convenient to install after replacing or repairing the mechanical seal. No gasket or manual control of the lifting height of the pump shaft is required. The pump shaft can be lifted and lowered by simply lifting and rotating the slot with the required lifting height, thereby avoiding dry friction of the impeller at the bottom of the pump shaft and dry friction with the motor bracket caused by excessive lifting of the rigid coupling. At the same time, the block also reduces the friction torque between the rigid coupling and the output shaft, thereby extending the service life of the rigid coupling.

[0019] (2) The utility model provides a flushing pipe at the outlet of the pump body so that when the pipeline pump is working, the high-flow rate liquid at the outlet can continuously lubricate and flush the mechanical seal through the flushing pipe, thereby reducing the accumulation of impurities in the liquid transported by the pipeline pump at the mechanical seal, extending the service life of the mechanical seal, improving the stability of the mechanical seal, and reducing the frequency of inspection and replacement of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is an assembly diagram of a vertical pipeline pump with a rigid coupling according to the utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the structure of the rigid coupling of the utility model;

[0024] Figure 4 for Figure 3 A front view of

[0025] Figure 5 This is a schematic diagram of the motor shaft structure of the utility model;

[0026] Figure 6 for Figure 5 A top view of

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Motor; 101. Output shaft; 102. Block; 2. Motor bracket; 3. Rigid coupling; 301. Slot; 3011. Lifting slot; 3012. Slide slot; 4. Mechanical seal; 5. Mechanical seal end cover; 6. Shaft sleeve; 7. Pump cover; 8. Impeller key; 9. Impeller nut; 10. Impeller; 11. Sealing ring; 12. Pump body; 13. Flushing pipe. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1 As shown, a vertical pipeline pump with a rigid coupling includes a pump body 12, an impeller 10 and a motor 1;

[0031] A motor bracket 2 is arranged on the pump body 12, and a motor 1 is arranged on the motor bracket 2. The output shaft 101 of the motor 1 is connected to one end of the pump shaft through a rigid coupling 3, and the other end of the pump shaft is connected to the impeller 10. The impeller 10 is arranged in the pump body 12, and a shaft sleeve 6 is sleeved on the pump shaft above the impeller 10. A mechanical seal 4 is arranged on the pump shaft above the shaft sleeve 6. A mechanical seal end cover 5 is arranged on the pump shaft above the mechanical seal 4. A pump cover 7 is arranged between the mechanical seal end cover 5 and the pump body 12, and a flushing pipe is arranged at the outlet of the pump body 12 to be connected to the mechanical seal 4.

[0032] See also Figure 2 , Figure 5 , Figure 6 As shown, two clamping blocks 102 are symmetrically arranged at the lower end of the side of the output shaft 101 of the motor 1. The shape of the clamping blocks 102 is a right-angled trapezoid, and the hypotenuse of the clamping blocks 102 faces upward;

[0033] In order to reduce the wear of the bevel corner of the block 102 , a plane parallel to the ground of the block 102 is set at the bevel corner at one end of the higher bevel of the block 102 .

[0034] See also Figure 3 , Figure 4 As shown, a slot 301 is provided at the position where the rigid coupling 3 engages with the block 102 of the output shaft 101, and the slot 301 consists of a lifting slot 3011 provided in the center of the upper end of the rigid coupling 3 and a sliding slot 3012 connected to the left side of the lifting slot 3011, the upper end of the lifting slot 3011 is consistent with the shape of the block 102, and the lower end is a rectangular slot with the same height as the block 102; the sliding slot 3012 has the same shape as the lifting slot 3011, and the height of the sliding slot 3012 is lower than the lifting slot 3011, and the difference between the highest points of the sliding slot 3012 and the lifting slot 3011 is the required lifting height of the pump shaft.

[0035] Working principle:

[0036] When the rigid coupling 3 is installed, the lower end of the rigid coupling 3 is fixed to the pump shaft, and the upper end can slide up and down and rotate left and right with the output shaft 101 when the bolts are not tightened. The block 102 of the output shaft 101 is located at the top of the lifting groove 3011. When the coupling is lifted up to drive the pump shaft to move upward, the block 102 is relatively displaced downward, so that the block 102 is located at the bottom of the lifting groove 3011. At this time, the rigid coupling 3 is rotated clockwise, and the plane at the top of the block 102 slides to the right side of the lifting groove 3011. Under the action of gravity, the output shaft 101 and the rigid coupling 3 slide, so that the block 102 slides upward to the top of the lifting groove 3011, realizing the installation steps of "lifting the pump shaft to the top and then lowering it to a certain height" without a gasket, and the block 102 reduces the friction torque between the rigid coupling 3 and the output shaft 101, thereby extending the service life of the rigid coupling 3.

[0037] The flushing pipe provided at the outlet of the pump body 12 of the utility model can enable the high-flow-rate liquid at the outlet to continuously lubricate and flush the mechanical seal 4 when the pipeline pump is working, thereby reducing the accumulation of impurities in the liquid transported by the pipeline pump at the mechanical seal 4, extending the service life of the mechanical seal 4, improving the stability of the mechanical seal 4, and reducing the frequency of checking and replacing the mechanical seal 4.

[0038] The use steps of this utility model:

[0039] Step 1: Take out the fixing bolts on both sides of the rigid coupling 3, separate the two rigid couplings 3, and check whether the mechanical seal 4 is damaged. If the mechanical seal 4 is damaged, replace the mechanical seal 4. If the mechanical seal 4 is not damaged, proceed to step 2.

[0040] Step 2: Make the lower end of the rigid coupling 3 fit accurately with the pump shaft, fit the clamping block 102 of the output shaft 101 to the top of the lifting groove 3011 of the rigid coupling 3, install and tighten the fixing bolts of the rigid coupling 3 on both sides of the pump shaft, so that the pump shaft and the rigid coupling 3 are tightly combined;

[0041] Step 3: Install and adjust the tightness of the remaining fixing bolts so that the rigid coupling 3 and the output shaft 101 can slide up and down and rotate left and right;

[0042] Step 4: Lift the rigid coupling 3 to the highest position, then rotate the rigid coupling 3 clockwise until the height of the rigid coupling 3 remains unchanged, tighten the remaining fixing bolts, and the installation is completed.

[0043] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above contents are merely examples and explanations of the structure of the utility model. The technicians in the technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A vertical pipeline pump with a rigid coupling, comprising a pump body (12), an impeller (10), a rigid coupling (3) and a motor (1), It is characterized in that A clamping block (102) is provided on the output shaft (101) of the motor (1), and a clamping groove (301) is provided on the inner wall of the rigid coupling (3); A motor bracket (2) is arranged on the pump body (12), a motor (1) is arranged on the motor bracket (2), an output shaft (101) of the motor (1) and one end of the pump shaft are connected via a rigid coupling (3), the other end of the pump shaft is connected to an impeller (10), the impeller (10) is arranged in the pump body (12), a shaft sleeve (6) is sleeved on the pump shaft above the impeller (10), a mechanical seal (4) is arranged on the pump shaft above the shaft sleeve (6), a machine seal end cover (5) is arranged on the pump shaft above the mechanical seal (4), a pump cover (7) is arranged between the machine seal end cover (5) and the pump body (12), and a flushing pipe is arranged at the outlet of the pump body (12) and connected to the mechanical seal (4).

2. A vertical pipeline pump with a rigid coupling according to claim 1, It is characterized in that Two clamping blocks (102) are symmetrically arranged at the lower end of the side surface of the output shaft (101) of the motor (1).

3. A vertical pipeline pump with a rigid coupling according to claim 2, It is characterized in that The shape of the clamping block (102) is a right-angled trapezoid, with the oblique side of the clamping block (102) facing upwards.

4. A vertical pipeline pump with a rigid coupling according to claim 3, It is characterized in that The bevel angle at one end of the higher bevel of the block (102) is arranged parallel to the plane of the ground of the block (102).

5. A vertical pipeline pump with a rigid coupling according to claim 1, It is characterized in that The clamping groove (301) is composed of a lifting groove (3011) arranged at the center of the upper end of the rigid coupling (3) and a sliding groove (3012) connected to the left side of the lifting groove (3011).

6. A vertical pipeline pump with a rigid coupling according to claim 5, It is characterized in that The upper end of the lifting groove (3011) matches the shape of the clamping block (102), and the lower end is a rectangular groove with the same height as the clamping block (102).

7. A vertical pipeline pump with a rigid coupling according to claim 6, It is characterized in that The sliding groove (3012) has the same shape as the lifting groove (3011), and the height of the sliding groove (3012) is lower than that of the lifting groove (3011).

8. A vertical pipeline pump with a rigid coupling according to claim 7, It is characterized in that The difference between the highest points of the sliding groove (3012) and the lifting groove (3011) is the required lifting height of the pump shaft.

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