A test fixture for testing the inlet of sewage pump impeller blades

Abstract

The present invention relates to a gauge for detecting the blade inlet of a sewage pump impeller, comprising a working part and a detecting part, wherein the working part has an A reference surface, and the A reference surface is used for positioning and assembling with the impeller, and the detecting part has a thickness detection part for detecting the thickness of the blade and a profile detection part for detecting the profile of the blade. The above scheme provided by the present invention is used to replace the laser scanning technology, has the characteristics of simple manufacture, low cost, convenient operation, and no restriction on the use position, is suitable for the measurement of large quantities of parts, has high detection efficiency, and can ensure the detection quality.

Description

Technical Field

[0001] The invention relates to the field of manufacturing impeller blades for sewage pumps, and in particular to a testing tool for testing an inlet of impeller blades for sewage pumps. Background Art

[0002] The impeller is the core component of the sewage pump for converting energy. Its performance directly affects the overall performance of the pump, especially the blade inlet, which is related to the cavitation performance of the pump and affects whether the pump can operate safely and stably. Therefore, it is necessary to detect the blade inlet. The main detection technology at present is laser scanning technology, but the laser scanning technology has a slow processing process, is limited by the use position, has high cost, and is not easy to measure large quantities of parts. Summary of the invention

[0003] The purpose of the present invention is to provide a detection fixture for detecting the inlet of impeller blades of a sewage pump, which can realize rapid detection of the impeller blades and improve detection efficiency.

[0004] A gauge for detecting the blade inlet of a sewage pump impeller, characterized in that it comprises a working part and a detecting part, the working part having an A reference surface, the A reference surface being used for positioning and assembling with the impeller, and the detecting part having a thickness detecting portion for detecting the blade thickness and a profile detecting portion for detecting the blade profile.

[0005] The specific plan is:

[0006] The working part comprises a working table and a positioning assembly part. The working table is used for positioning and assembling with the impeller, and the positioning assembly part is used for assembling the detection part on the working table.

[0007] The detection part includes a detection plate, and the detection plate includes an A1 detection plate part and an A2 detection plate part. The A1 detection plate part and the A2 detection plate part are arranged in an L shape. A semicircular A vacancy is set on the upper plate surface of the edge where the A1 detection plate part and the A2 detection plate part meet. The A vacancy constitutes the thickness detection part. The plate edge of the A2 detection plate part close to the A1 detection plate part is recorded as the A2 plate edge. The shape of the A2 plate edge is set to be consistent with the shape of the standard blade profile, constituting the side wall of the A vacancy and the A2 plate edge arranged in a continuous manner.

[0008] The detection plate and the positioning assembly part form a detachable connection and are rotationally assembled therebetween.

[0009] The positioning assembly includes a positioning rod section, and the end faces of the positioning rod section are respectively recorded as C reference plane and D reference plane, the lower plate surface of the detection plate is recorded as E reference plane, the workbench is composed of a plate body, the lower plate surface of the plate body is recorded as A reference plane, and the upper plate surface of the plate body is recorded as B reference plane. When the workbench and the positioning assembly are assembled and connected, the B and C reference planes are abutted and positioned, and when the positioning assembly and the detection plate are assembled and connected, the D and E reference planes are abutted and positioned.

[0010] An A1 assembly hole is provided on one of the B and C reference surfaces, and an A1 positioning pin is provided on the other. When the workbench and the positioning assembly part are assembled and connected, the A1 assembly hole and the A1 positioning pin are plugged and positioned.

[0011] An A2 assembly hole is provided on one of the D and E reference surfaces, and an A2 positioning pin is provided on the other. When the positioning assembly part and the detection plate are assembled and connected, the A2 assembly hole and the A2 positioning pin are plugged and positioned.

[0012] The A1 assembly hole is set on the B reference plane, and the A1 positioning pin is set on the C reference plane.

[0013] The A2 assembly hole is set on the E reference plane, the A2 positioning pin is set on the D reference plane, the A2 assembly hole is set on the end of the A1 detection plate away from the A2 detection plate, the A2 positioning pin is a cylindrical pin, and the A2 assembly hole is a round hole.

[0014] The workbench is composed of a circular plate, and the A1 assembly hole is arranged eccentrically.

[0015] Compared with the prior art, the technical effect of the present invention is that through the setting of the inspection fixture of the above structure, it can effectively and quickly realize reliable and rapid inspection of the impeller blades of the sewage pump, and the inspection effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural diagram of the workbench;

[0018] Figure 3 It is a structural schematic diagram of the detection board;

[0019] Figure 4 It is a schematic diagram of the structure of the positioning assembly;

[0020] Figure 5 This is a schematic diagram of the structure of the detection and assembly of the impeller blades of the sewage pump according to the present invention;

[0021] Figure 6 for Figure 5 A top view of

[0022] Description of the figure number:

[0023] 100-workbench, 101-A reference surface, 102-B reference surface, 103-A1 assembly hole, 200-positioning assembly, 210-positioning rod section, 211-C reference surface, 212-D reference surface, 221-A1 positioning pin, 222-A2 positioning pin, 300-detection plate, 310-A1 detection plate part, 311-A vacant space, 312-A2 assembly hole, 313-E reference surface, 320-A2 detection plate part, 321-A2 plate edge, 400-impeller, 410-countersunk hole. DETAILED DESCRIPTION

[0024] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0025] As used herein, the terms "parallel," "perpendicular," and the like are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors.

[0026] like Figure 1 As shown, the inspection tool for inspecting the blade inlet of the sewage pump impeller 400 provided by the present invention includes a working part and a detection part. The working part has an A reference plane 101, and the A reference plane 101 is used for positioning and assembling with the impeller 400. The detection part has a thickness detection part for detecting the thickness of the blade and a profile line detection part for detecting the blade profile line.

[0027] Specific plans, such as Figure 2 , 3As shown in Figures 4 and 5, the working part includes a workbench 100 and a positioning assembly 200. The workbench 100 is used for positioning and assembling with the impeller 400, and the positioning assembly 200 is used for assembling the detection part on the workbench 100. The detection part includes a detection plate 300, and the detection plate 300 includes an A1 detection plate portion 310 and an A2 detection plate portion 320. The A1 detection plate portion 310 and the A2 detection plate portion 320 are arranged in an L shape. A semicircular A vacancy 311 is arranged on the upper plate surface of the edge where the A1 detection plate portion 310 and the A2 detection plate portion 320 meet. The A vacancy 311 constitutes the thickness detection part. The plate edge of the A2 detection plate portion 320 close to the A1 detection plate portion 310 is recorded as the A2 plate edge. The shape of the A2 plate edge 321 is set to be consistent with the shape of the standard blade profile, and the side wall of the A vacancy 311 and the A2 plate edge 321 are arranged in a continuous manner. The detection plate 300 and the positioning assembly 200 form a detachable connection, and the two are rotatably assembled. The positioning assembly 200 includes a positioning rod section 210, and the end surfaces of the positioning rod section 210 are respectively marked as C reference plane 211 and D reference plane 212, the lower plate surface of the detection plate 300 is marked as E reference plane 313, the workbench 100 is composed of a plate body, the lower plate surface of the plate body is marked as A reference plane 101, and the upper plate surface of the plate body is marked as B reference plane 102. When the workbench 100 and the positioning assembly are assembled and connected, the B and C reference planes are pressed against each other for positioning, and when the positioning assembly 200 and the detection plate 300 are assembled and connected, the D and E reference planes are pressed against each other for positioning.

[0028] The detailed scheme is as follows: an A1 assembly hole is provided on one of the B and C reference surfaces, and an A1 locating pin is provided on the other. When the workbench 100 and the positioning assembly are assembled and connected, the A1 assembly hole and the A1 locating pin 221 are plugged and positioned. An A2 assembly hole is provided on one of the D and E reference surfaces, and an A2 locating pin 222 is provided on the other. When the positioning assembly and the detection plate 300 are assembled and connected, the A2 assembly hole and the A2 locating pin are plugged and positioned. The A1 assembly hole is provided on the B reference surface 102, and the A1 locating pin is provided on the C reference surface 211. The A2 assembly hole is provided on the E reference surface 313, and the A2 locating pin is provided on the D reference surface 212. The A2 assembly hole 312 is provided on the end of the A1 detection plate portion 310 away from the A2 detection plate portion 320. The A2 locating pin is a cylindrical pin, and the A2 assembly hole is a circular hole. The workbench 100 is composed of a circular plate body, and the A1 assembly hole is eccentrically arranged.

[0029] Specifically, the workbench 100 is composed of a cylindrical thin steel plate. The diameter of the workbench 100 is equal to the diameter of the countersunk hole 410 for axial locking of the impeller 400. The function of the workbench 100 is to align the central axis of the inspection fixture with the central axis of the impeller 400 and provide a reference for axial measurement for detection. The blade profile detection point and the blade thickness detection point on the detection plate 300 are obtained through the impeller 400 model diagram. The thickness of the blade detection plate 300 is 0.3-0.5 mm; the A1 and A2 assembly holes are arranged concentrically. The assembly connector is in the shape of a cylindrical stepped shaft and consists of three parts: a positioning rod section 210 for determining the blade detection position and A1 and A2 positioning pins located at both ends of the positioning rod section 210 for fixing. The two parallel end faces of the positioning rod section 210 are C and D reference surfaces respectively; the diameters of the A1 and A2 positioning pins are equal and equal to the apertures of the A1 and A2 assembly holes. The diameter of the positioning rod section 210 is greater than the diameters of the two positioning pins.

[0030] The method for performing the detection operation using the present invention is as follows: Figure 5 , 6 As shown, first, place the impeller 400 horizontally with the inlet facing upward on a flat ground, insert the workbench 100 into the countersunk hole 410 for axial locking of the impeller 400, and make the A reference surface 101 fit tightly with the plane of the countersunk hole 410 for axial locking of the impeller 400; then, insert the A1 locating pin into the A1 assembly hole 103, so that the C reference surface 211 and the B reference surface 102 fit tightly; secondly, insert the detection plate 300 onto the A2 locating pin through the A2 connecting hole, so that the D reference surface 212 and the E reference surface 313 fit tightly, connect the positioning assembly and the detection plate 300, adjust the positions of the workbench 100 and the detection plate 300, so that the detection plate 300 contacts the inlet edge of the blade, and observe the fit between the detection plate 300 and the inlet surface of the blade. The inspection fixture combines blade profile detection with blade thickness detection. By observing and detecting the fit between blade profiles, it can quickly determine whether the blade meets the acceptance standards. At the same time, the thickness detection part can also detect whether the thickness of the blade inlet edge meets the requirements.

[0031] The above-mentioned scheme provided by the present invention is used to replace the laser scanning technology, and has the characteristics of simple manufacture, low cost, convenient operation, and no restriction on the use position. It is suitable for the measurement of large quantities of parts, has high detection efficiency, and can ensure the detection quality.

Claims

1. A test fixture for testing the blade inlet of a sewage pump impeller, characterized in that: It comprises a working part and a detection part, the working part has an A reference surface, the A reference surface is used for positioning and assembling with the impeller, and the detection part has a thickness detection part for detecting the thickness of the blade and a profile line detection part for detecting the profile line of the blade; The working part includes a workbench and a positioning assembly, the workbench is used for positioning and assembling with the impeller, and the positioning assembly is used to realize the assembly of the detection part on the workbench; the detection part includes a detection plate, the detection plate includes an A1 detection plate part and an A2 detection plate part, the A1 detection plate part and the A2 detection plate part are arranged in an L shape, a semicircular A vacancy is set on the upper plate surface of the edge at the intersection of the A1 detection plate part and the A2 detection plate part, and the A vacancy constitutes the thickness detection part, the plate edge of the A2 detection plate part close to the A1 detection plate part is recorded as the A2 plate edge, and the shape of the A2 plate edge is set to be consistent with the standard blade profile The shape of is consistent, forming the side wall of the A vacancy and the A2 board edge in a continuous arrangement; the detection plate and the positioning assembly constitute a detachable connection, and the two are rotated and assembled; the positioning assembly comprises a positioning rod body segment, the end faces of the positioning rod body segment are respectively recorded as C reference plane and D reference plane, the lower plate surface of the detection plate is recorded as E reference plane, the workbench is composed of a circular plate body, the lower plate surface of the plate body is recorded as A reference plane, and the upper plate surface of the plate body is recorded as B reference plane. When the workbench and the positioning assembly are assembled and connected, the B and C reference planes are positioned against each other, and when the positioning assembly and the detection plate are assembled and connected, the D and E reference planes are positioned against each other; The diameter of the workbench is equal to the diameter of the countersunk hole for axial locking of the impeller. The function of the workbench is to align the central axis of the gauge with the central axis of the impeller and provide a reference for axial measurement for detection.

2. The inspection tool for inspecting the inlet of impeller blades of a sewage pump according to claim 1, characterized in that: An A1 assembly hole is provided on one of the B and C reference surfaces, and an A1 positioning pin is provided on the other. When the workbench and the positioning assembly part are assembled and connected, the A1 assembly hole and the A1 positioning pin are plugged and positioned.

3. The inspection tool for inspecting the inlet of impeller blades of a sewage pump according to claim 1, characterized in that: An A2 assembly hole is provided on one of the D and E reference surfaces, and an A2 positioning pin is provided on the other. When the positioning assembly part and the detection plate are assembled and connected, the A2 assembly hole and the A2 positioning pin are plugged and positioned.

4. The inspection tool for inspecting the inlet of impeller blades of a sewage pump according to claim 2, characterized in that: The A1 assembly hole is set on the B reference plane, and the A1 positioning pin is set on the C reference plane.

5. The inspection tool for inspecting the inlet of impeller blades of a sewage pump according to claim 3, characterized in that: The A2 assembly hole is set on the E reference plane, the A2 positioning pin is set on the D reference plane, the A2 assembly hole is set on the end of the A1 detection plate away from the A2 detection plate, the A2 positioning pin is a cylindrical pin, and the A2 assembly hole is a round hole.

6. The inspection tool for inspecting the inlet of impeller blades of a sewage pump according to claim 2, characterized in that: A1 assembly hole is arranged eccentrically.

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