Chemical pump impeller fixing structure with coating spray positioning clamp

Abstract

The utility model discloses a chemical pump impeller fixing structure with coating spraying positioning fixture, include: air cylinder, set two groups, the first group includes two air cylinders, two air cylinders are located on the same line symmetry and set, the second group also includes two air cylinders, two air cylinders are located on the same line symmetry and set, the position connection of two air cylinders of second group is perpendicular to the position connection of two air cylinders of first group, axial clamping structure, the motor of two air cylinders of first group is set up and sets up a group of axial clamping structure, two groups of axial clamping structures are clamped in impeller axial place from impeller two side surfaces respectively, rim clamping structure, the motor of two air cylinders of second group is set up and sets up a group of rim clamping structure, two groups of rim clamping structures are clamped on the rim of impeller from impeller rim two sides respectively. The utility model has solved the problem that the current impeller coating spraying single point clamping fixing can cause the clamping point to be unable to be covered by coating spraying because of shielding.

Description

Technical Field

[0001] This utility model belongs to the field of chemical pump impeller coating processing technology, specifically relating to a chemical pump impeller fixing structure with a coating spraying positioning fixture. Background Technology

[0002] In the field of chemical production, chemical pumps are core equipment for conveying corrosive media and high-temperature, high-pressure fluids. The performance of their impellers directly affects the pump's operating efficiency and service life. Due to prolonged contact with corrosive media such as acids, alkalis, and salt spray, the impeller surface of chemical pumps needs to be coated with anti-corrosion and wear-resistant coatings to improve its corrosion resistance and wear resistance, and reduce the wear caused by fluid scouring.

[0003] Spraying corrosion-resistant and wear-resistant coatings on impellers is an essential process, both during the production of new impellers and in the later maintenance of chemical pump impellers. Especially during the use of chemical pumps, the coating on the impeller surface will wear off with use, requiring timely disassembly and coating maintenance. Impeller coating spraying typically requires the use of specialized clamps to hold and fix the impeller, facilitating all-around coating application. Generally, the clamping and fixing structure can only clamp the impeller at a single point, either clamping it at both sides of the impeller shaft or symmetrically clamping it along the impeller edge. Regardless of the clamping and fixing method, the clamping point will cause obstruction, preventing the coating from being applied. Secondary processing is required to separately spray the obstructed areas. Summary of the Invention

[0004] This invention provides a chemical pump impeller fixing structure with a coating spraying positioning fixture. It features dual clamping points: first, the impeller is symmetrically clamped and fixed at the shaft center for spraying; second, for areas obstructed by the clamping points at the shaft center, the clamping points can be replaced with symmetrical clamping and fixing on both sides of the impeller edge, allowing for spraying of the obstructed areas at the shaft center again. This ensures that no areas are missed during spraying due to clamping point obstruction, eliminating the need for secondary spraying. This invention solves the problem of single-point clamping and fixing of impeller coatings, which leads to the clamping points being obstructed and unable to be covered by the coating.

[0005] To achieve the above-mentioned technical objectives, this utility model is implemented through the following technical solution: A chemical pump impeller fixing structure with a coating spraying positioning fixture includes: The control panel serves as the work platform for impeller spraying operations; The cylinder is provided in two groups. The first group includes two cylinders, which are symmetrically arranged on the same straight line. The second group also includes two cylinders, which are symmetrically arranged on the same straight line. The line connecting the positions of the two cylinders in the second group is perpendicular to the line connecting the positions of the two cylinders in the first group. Each cylinder has a movable column, and two cylinders in the same group drive two movable columns to move towards or away from each other. Each of the moving columns is equipped with a set of motors at its upper end; The shaft clamping structure is provided on each of the two motors above the two cylinders in the first group; the two sets of shaft clamping structures clamp the impeller shaft from both sides. The edge clamping structure is provided on the motors above the two cylinders of the second group. Each of the two sets of edge clamping structures clamps the impeller from both sides of the impeller edge.

[0006] Preferably, the shaft clamping structure is configured as a flexible suction cup, which is used to adhere to the smooth surface at the impeller shaft.

[0007] Preferably, the suction cup is a vacuum suction cup, and the vacuum suction cup is connected to the air pump through an air supply pipe.

[0008] Preferably, a patch pressure sensor is provided on the contact surface between the shaft clamping structure and the impeller surface. The patch pressure sensor is used to monitor the contact pressure between the shaft clamping structure and the impeller and to determine the magnitude of the clamping force of the shaft clamping structures on both sides on the impeller.

[0009] Preferably, the edge clamping structure is configured as a clamping groove shell with an arc-shaped groove structure, and the clamping groove shell is fitted and fixed to the edge of the impeller to clamp the edge of the impeller.

[0010] Preferably, the inner wall of the clamping groove shell is provided with a clamping groove inflation layer, the clamping groove inflation layer and the clamping groove shell are both arc-shaped groove structures, and the clamping groove inflation layer is connected to an air pump through an air supply pipe.

[0011] Preferably, a first pressure sensor and a second pressure sensor are respectively provided on the back side of the air-filled layer of the clamping groove that contacts the impeller and on the inner side of the bottom surface.

[0012] Preferably, a rotation angle sensor is provided on the motor shaft above the first group of cylinders and the second group of cylinders. The rotation angle sensor is used to monitor the angle at which the motor drives the shaft clamping structure and the edge clamping structure to rotate.

[0013] Preferably, two guide rods are provided above the cylinder, and sliders are movably mounted on the two guide rods. The sliders are connected to the piston inside the cylinder. The movement of the piston drives the sliders to move synchronously. The moving column is provided on the sliders.

[0014] Preferably, the movable column is configured as a hydraulic lifting structure; after spraying is completed under the first clamping method, the second clamping method is switched to continue spraying; at this time, the first clamping structure descends under the drive of the movable column, which will not hinder the second clamping structure from fixing the impeller to carry out the spraying operation.

[0015] The beneficial effects of this utility model are: This utility model provides a chemical pump impeller fixing structure with a coating spraying positioning fixture. It features a dual-point clamping fixing structure, allowing for clamping and fixing of the impeller shaft from both sides and from the impeller edge. Before spraying, either clamping method can be selected. After spraying most of the impeller area, the other clamping method can be switched to spray previously unsprayed areas, ensuring that all parts of the impeller are coated in a single operation. No secondary operation or human intervention is required. The clamping methods provided by this utility model are all flexible clamping and fixing, which avoids the clamping wear that rigid clamping may cause to the impeller surface, affecting the uniformity of coating coverage. More importantly, it avoids the working performance of the impeller in conveying fluid due to impeller surface wear. The clamping structure of this utility model can carry the impeller to rotate 360°. During the spraying process, rotating the impeller can make the paint cover the impeller surface more evenly. Furthermore, by setting the rotation angle monitoring, the impeller can be rotated to any desired position for positioning, exposing a specific location, which is convenient for special spraying or repair of that location. The clamping structure of this utility model is equipped with pressure monitoring. By measuring the clamping pressure between the clamping structure and the impeller, it ensures stable clamping without causing damage to the impeller surface due to over-clamping. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 1 ; Figure 2This is a schematic diagram of the overall structure of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the edge clamping structure and its driving structure of this utility model; Figure 4 This is a schematic diagram of the shaft clamping structure and its driving structure of this utility model; Figure 5 This is a schematic diagram of the edge clamping groove of this utility model.

[0018] In the attached diagram, the structural names represented by each number are as follows: 1-Operating table, 2-Cylinder, 201-Guide rod, 202-Slider, 3-Moving column, 4-Motor, 5-Vacuum suction cup, 6-Edge clamping groove, 601-Clamping groove housing, 602-Clamping groove inflation layer, 603-First pressure sensor, 604-Second pressure sensor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 A chemical pump impeller fixing structure with a coating spraying positioning fixture includes: an operating platform 1, which serves as an installation platform for the spraying positioning fixture and an operating platform for spraying the impeller; in order to make the operating platform 1 more stable during operation, a balance support rod structure is provided under the operating platform 1. like Figure 1 As shown, cylinders 2 are arranged on the upper surface of the operating table 1. There are two sets of cylinders 2, each set consisting of two cylinders 2. The two cylinders 2 in the first set are located on the same straight line and are symmetrically arranged. These two cylinders 2 are used to control the first clamping method. The two cylinders 2 in the second set are also located on the same straight line and are symmetrically arranged. These two cylinders 2 are used to control the second clamping method. The line connecting the positions of the two cylinders 2 in the first set is perpendicular to the line connecting the positions of the two cylinders 2 in the second set. The driving principle and structure of cylinder 2 are existing technologies known to those skilled in the art. The basic principle is that cylinder 2 is connected to an air pump. The air pump fills cylinder 2 with air, which can push the piston inside cylinder 2 to move and provide driving force for cylinder 2. like Figure 3 as well as Figure 4As shown, two guide rods 201 are set above the cylinder 2, and sliders 202 are movably mounted on the guide rods 201. The sliders 202 are connected to the piston inside the cylinder 2. The movement of the cylinder piston can synchronously drive the sliders 202 to move. The two guide rods 201 are symmetrically arranged to ensure the stability of the sliders 202 during the movement. A moving column 3 is set above each set of sliders 202, and a motor 4 is set at the upper end of each moving column 3. like Figure 1 or Figure 2 As shown, each of the two moving columns 3 on the upper end of the motor rotor of the two cylinders 2 in the first group is provided with a set of shaft clamping structures. The two cylinders 2 in the first group drive the two moving columns 3 to move towards each other. At this time, the two sets of shaft clamping structures approach the impeller from both sides and clamp the impeller at the shaft center to achieve clamping and fixing of the impeller. For example, the above-mentioned shaft clamping structure is configured as a rigid or flexible planar contact that can be in contact with the surface of the impeller shaft. The planar contacts on both sides are in contact with the impeller shaft, and the shaft clamping structures on both sides move towards each other to clamp the impeller. For example, in this embodiment, the shaft clamping structure is set as a flexible suction cup structure, and the contact surface between the suction cup and the impeller is made of silicone or rubber. After contacting the relatively smooth surface at the shaft of the impeller, it can produce a strong adhesion effect; at the same time, the flexible material of silicone or rubber will not cause wear to the impeller surface. As a preferred embodiment, in order to make the suction cup adhere more firmly to the impeller surface, the suction cup is set as a vacuum suction cup 5. The vacuum suction cup 5 can be operated by manual vacuuming, or the vacuum suction cup 5 can be connected to an air supply pipe, which is connected to an air pump. The air pump is used to evacuate the space between the vacuum suction cup 5 and the impeller surface. Under the action of pressure difference, the vacuum suction cup 5 can be firmly adsorbed onto the impeller surface. In a preferred embodiment, regardless of the structure used as the shaft clamping structure, a patch pressure sensor is provided on the contact surface between the shaft clamping structure and the impeller. When the shaft clamping structures on both sides are attached to the two sides of the impeller and move towards each other to clamp the impeller, the patch pressure sensor is used to monitor the clamping force. The patch pressure sensor is communicatively connected to the input terminal of the processor, and the output terminal of the processor is communicatively connected to the drive component of cylinder 2. A preset clamping force threshold is set. During the clamping force application process, the patch pressure sensor monitors the clamping force of the shaft clamping structure on the impeller in real time and feeds it into the processor. When the clamping force reaches the threshold, the processor sends a control command to the cylinder drive component, and cylinder 2 stops running to maintain a constant clamping force. After the shaft clamping structure clamps and fixes the impeller from both sides, the impeller 2 can be sprayed. At this time, the motor 4 can be controlled to drive the clamped impeller to rotate. By controlling the impeller to rotate while spraying, the spraying can be more uniform. There is no need to manually operate the impeller to change its position during the spraying process. like Figure 1 or Figure 2 As shown, on the two moving columns 3 corresponding to the two cylinders 2 in the second group, a set of edge clamping structures is set on the rotor of the motor 4. The cylinders 2 drive the moving columns 3 to move towards each other, so that the edge clamping structures on the upper end of the moving columns 3 approach the edge of the impeller and clamp the impeller. For example, the edge clamping structure described above is configured as a mechanically controlled gripper structure, which uses mechanical control to make the gripper grasp the edge of the impeller, thereby clamping the impeller from the edge. For example, in this embodiment, the edge clamping structure is set as a clamping groove shell 601 with an arc-shaped groove structure. The arc-shaped groove structure can adapt to the arc-shaped edge structure of the impeller. The inner groove opening is fixed to the edge of the impeller to realize the clamping and holding of the impeller from the edge. The entire clamping groove shell 601 can be made of a composite material with certain toughness and elasticity, which has better clamping and fitting adaptability. As a preferred embodiment, such as Figure 5 As shown, a clamping groove inflation layer 602 is provided on the inner wall of the clamping groove shell 601. The clamping groove inflation layer 602 and the clamping groove shell 601 are also set as arc-shaped groove structures. The clamping groove inflation layer 602 is connected to the inflation pump through an air supply pipe. After the entire clamping groove shell 601 and the clamping groove inflation layer 602 are fixed to the edge of the impeller, the air pump inflates the clamping groove inflation layer 602 until it is full. After the clamping groove inflation layer 602 is full, it fully compresses and contacts the edge of the impeller, improving the clamping stability of the edge clamping structure on the impeller. In addition, the clamping groove inflation layer 602 is a flexible structure, which maintains flexible clamping contact with the impeller, avoiding wear on the impeller surface that may be caused by rigid contact. In a preferred embodiment, a first pressure sensor 603 and a second pressure sensor 604 are respectively provided on the back side and the inner side of the bottom surface of the air-filled layer 602 of the clamping groove that contact the impeller. Both pressure sensors are patch pressure sensors. The first pressure sensor 603 is used to monitor the clamping force when the edge clamping structures on both sides move towards each other to clamp the impeller from the edge. The second pressure sensor 604 is used to monitor the squeezing force between the air-filled layer 602 of the clamping groove and the impeller during the inflation process, thereby controlling the inflation degree. The first pressure sensor 603 and the second pressure sensor 604 are both communicatively connected to the input terminal of the processor, and the output terminal of the processor is communicatively connected to the cylinder drive assembly and the air pump. The edge clamping structures on both sides of the impeller move towards each other and clamp and fix the impeller on the edge to achieve clamping and fixing of the impeller; then the motor drives the impeller to rotate, and spraying is also done while rotating, so that the spraying is more uniform. In a preferred embodiment, a rotation angle sensor is installed on the motor shaft above the first set of cylinders 2 and the second set of cylinders 2 to monitor the rotation amplitude of the motor 4. The rotation angle sensor is communicatively connected to the processor input terminal. Alternatively, a servo motor can be used, and the rotation angle of the servo motor can be directly set and controlled. By controlling the rotation angle of the motor 4, the rotation angle of the clamped impeller is synchronously controlled, so that the impeller can be precisely adjusted and controlled to rotate in the direction most convenient for spraying.

[0021] Example 2 Based on Embodiment 1, in Embodiment 1, the movable column 3 is a structure with a fixed height, and the two clamping structures are on the same plane. In this case, when one clamping structure is used to clamp and fix the impeller, the second clamping structure may interfere with the spraying operation. Therefore, in this embodiment, the moving column 3 is set as a hydraulic lifting column structure, which can adjust the height of the moving column 3, thereby simultaneously adjusting the height position of any of the clamping structures; after the first spraying is completed using any of the clamping structures, it seamlessly switches to the second clamping structure to clamp the impeller. At this time, the first clamping structure can be lowered to a position that will not obstruct the spraying under the drive of the moving column 3.

Claims

1. A chemical pump impeller fixing structure with a coating spraying positioning fixture, comprising: The control panel serves as the work platform for impeller spraying operations; The cylinder is provided in two groups. The first group includes two cylinders, which are symmetrically arranged on the same straight line. The second group also includes two cylinders, which are symmetrically arranged on the same straight line. The line connecting the positions of the two cylinders in the second group is perpendicular to the line connecting the positions of the two cylinders in the first group. Each cylinder has a movable column, and two cylinders in the same group drive two movable columns to move towards or away from each other. Each of the moving columns is equipped with a set of motors at its upper end; Its characteristic is that it further includes: The shaft clamping structure is provided on each of the two motors above the two cylinders in the first group; the two sets of shaft clamping structures clamp the impeller shaft from both sides. The edge clamping structure is provided on the motors above the two cylinders of the second group. Each of the two sets of edge clamping structures clamps the impeller from both sides of the impeller edge.

2. The chemical pump impeller fixing structure with coating spraying positioning fixture according to claim 1, characterized in that, The shaft clamping structure is configured as a flexible suction cup, which is used to adhere to the smooth surface of the impeller shaft.

3. The chemical pump impeller fixing structure with coating spraying positioning fixture according to claim 2, characterized in that, The suction cup is configured as a vacuum suction cup, and the vacuum suction cup is connected to the air pump through an air supply pipe.

4. The chemical pump impeller fixing structure with coating spraying positioning fixture according to claim 1, characterized in that, A patch pressure sensor is provided on the contact surface between the shaft clamping structure and the impeller surface. The patch pressure sensor is used to monitor the contact pressure between the shaft clamping structure and the impeller and to determine the magnitude of the clamping force of the shaft clamping structure on both sides on the impeller.

5. The chemical pump impeller fixing structure with coating spraying positioning fixture according to claim 1, characterized in that, The edge clamping structure is configured as an arc-shaped groove shell, which fits and is fixed to the edge of the impeller to clamp the edge of the impeller.

6. The chemical pump impeller fixing structure with coating spraying positioning fixture according to claim 5, characterized in that, The inner wall of the clamping groove shell is provided with a clamping groove inflation layer. The clamping groove inflation layer and the clamping groove shell are both arc-shaped groove structures. The clamping groove inflation layer is connected to the inflation pump through an air supply pipe.

7. A chemical pump impeller fixing structure with a coating spraying positioning fixture according to claim 6, characterized in that, A first pressure sensor and a second pressure sensor are respectively installed on the back side of the air-filled layer of the clamping groove that contacts the impeller and on the inner side of the bottom surface.

8. The chemical pump impeller fixing structure with coating spraying positioning fixture according to claim 1, characterized in that, Rotation angle sensors are installed on the motor shafts above the first and second sets of cylinders. The rotation angle sensors are used to monitor the angle at which the motor drives the shaft clamping structure and the edge clamping structure to rotate.

9. A chemical pump impeller fixing structure with a coating spraying positioning fixture according to claim 1, characterized in that, Two guide rods are provided above the cylinder, and sliders are movably mounted on the two guide rods. The sliders are connected to the piston inside the cylinder. The movement of the piston drives the sliders to move synchronously. The moving column is provided on the sliders.

10. A chemical pump impeller fixing structure with a coating spraying positioning fixture according to claim 1, characterized in that, The movable column is equipped with a hydraulic lifting structure.

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