Centering device for screw pump blank

Abstract

The utility model discloses a centering device for a screw pump blank, and belongs to the technical field of machining application. Comprising a positioning base plate, two sets of mounting bases detachably connected to the positioning base plate and two sets of positioning clamping bases which are oppositely arranged and slidably connected to the tops of the mounting bases in a lap joint mode, and profiling limiting grooves are formed in the positioning clamping bases; a convex groove structure is defined by the two sets of mounting bases and the positioning chassis, limiting plates connected with the positioning clamping seat are slidably connected into the convex groove structure, an adjusting screw rod penetrates through the two sets of limiting plates, the upper half portion and the lower half portion of the adjusting screw rod are in threaded connection with the two sets of limiting plates respectively, and the thread directions of the upper half portion and the lower half portion are opposite; a limiting block is arranged on the positioning base plate, and a limiting groove capable of being embedded into the periphery of the middle of the adjusting screw rod is formed in the limiting block; the centering device for the screw pump blank is high in precision, simple in structure and easy to maintain and repair.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical processing applications, and particularly relates to a centering device for a spiral pump blank. Background Art

[0002] A corrosion-resistant oil pump is a special type of pump used to transport corrosive media, commonly found in fields such as chemical engineering, petroleum, and pharmaceuticals. Based on the spiral structure of the spiral pump, a casting molding technique is usually adopted for rough blank manufacturing, and then processing equipment is used for fine processing. The spiral pump has high precision requirements for casting processing, especially for its centrality during processing. Usually, it is necessary to center on the spiral blade and the blade rotation axis of the blank at one time and then perform processing.

[0003] In the existing centering devices, complex mechanical equipment is usually used for clamping and fixing. Most of them automatically clamp and fix the blank of the spiral pump through cylinders or servo motors. Although the processing is time-saving and labor-saving, the later maintenance and repair costs of these mechanical equipment are relatively high, thus greatly increasing the processing cost.

[0004] Therefore, there is an urgent need to provide a centering device for a spiral pump blank to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a centering device for a spiral pump blank, which has high precision, a simple structure, and is easy to maintain and repair.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a centering device for a spiral pump blank, including a positioning chassis, two groups of mounting bases detachably connected to the positioning chassis, and two groups of positioning clamp seats arranged opposite to each other and slidingly lapped on the tops of the mounting bases. An imitation limiting groove is provided on the positioning clamp seat;

[0007] Among them, a convex groove structure is formed by surrounding between the two groups of mounting bases and the positioning chassis. A limiting plate connected to the positioning clamp seat is slidably connected in the convex groove structure. An adjusting screw is passed through the two groups of limiting plates. The upper half and the lower half of the adjusting screw are respectively threadedly connected to the two groups of limiting plates, and the thread directions of the upper half and the lower half are opposite;

[0008] A limiting block is provided on the positioning chassis, and a limiting groove capable of being embedded in the outer circumference of the middle part of the adjusting screw is provided on the limiting block.

[0009] Optionally, a plurality of support columns with the tops flush with the bottom of the imitation limiting groove are provided on the positioning chassis.

[0010] Optionally, the installation base includes an installation bottom block and an installation top block, and the installation top block is connected to the installation bottom block and the positioning chassis by bolts.

[0011] Optionally, the positioning clamp seat includes a positioning bottom plate and a positioning clamping plate detachably connected to the positioning bottom plate by bolts, and the profiling limiting groove is arranged on the positioning clamping plate.

[0012] Optionally, the positioning bottom plate is provided with an installation limiting groove, and the positioning clamping plate is provided with positioning convex portions that can be embedded in the installation limiting groove.

[0013] Optionally, hexagonal grooves are arranged at both ends of the adjusting screw rod.

[0014] Optionally, the two groups of installation bases are symmetrically arranged along the central axis of the adjusting screw rod.

[0015] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: placing the blank of the screw pump in the profiling limiting grooves on the two groups of positioning clamp seats, and by rotating the adjusting screw rod forward or backward, the two groups of limiting plates can be driven to move synchronously towards or away from each other. The whole structure is simple, with high precision and easy maintenance. Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is a schematic structural diagram of the centering device for the screw pump blank in the preferred embodiment of the present utility model;

[0018] Figure 2 is in the preferred embodiment of the present utility model Figure 1 front view structural diagram;

[0019] Figure 3 is in the preferred embodiment of the present utility model Figure 2 cross-sectional structural diagram at A-A;

[0020] Among them, 1, positioning chassis; 2, installation base; 21, installation bottom block; 22, installation top block; 3, positioning clamp seat; 31, positioning bottom plate; 311, installation limiting groove; 32, positioning clamping plate; 321, profiling limiting groove; 322, positioning convex portion; 4, limiting plate; 5, adjusting screw rod; 501, upper half; 502, lower half; 503, hexagonal groove; 6, limiting block; 601, limiting groove; 7, support column. Detailed Embodiment

[0021] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only showing the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0022] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If this specific posture changes, then the directional indication will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] As Figures 1-3 shown, a centering device for a spiral pump blank includes a positioning chassis 1, two groups of mounting bases 2 detachably connected to the positioning chassis 1, and two groups of positioning clamp seats 3 that are oppositely arranged and slidably lapped on the tops of the mounting bases 2. The positioning clamp seats 3 are provided with profiling limiting grooves 321, and the profiling limiting grooves 321 correspond to the outer peripheral contour of the spiral pump blank. The profiling limiting grooves 321 on the two groups of positioning clamp seats 3 can be symmetrically arranged around the center axis of the spiral pump blank along the outer periphery of the spiral pump blank to ensure the uniqueness of the positioning of the spiral pump blank;

[0024] Among them, a convex groove structure is formed by enclosing between the two groups of mounting bases 2 and the positioning chassis 1. A limiting plate 4 connected to the positioning clamp seat 3 is slidably connected in the convex groove structure. The limiting plate 4 and the positioning clamp seat 3 form an "I"-shaped structure, and the "I"-shaped structure corresponds to the convex groove structure, which can limit the vertical movement of the positioning clamp seat 3 on the mounting base 2. At the same time, an adjusting screw 5 is passed through the two groups of limiting plates 4. The upper half 501 and the lower half 502 of the adjusting screw 5 are respectively threadedly connected to the two groups of limiting plates 4, and the thread directions of the upper half 501 and the lower half 502 are opposite. By twisting the adjusting screw 5, the two groups of limiting plates 4 can be driven to move synchronously towards or away from each other. That is, when the spiral pump blank is placed in the profiling limiting grooves 321 on the two groups of positioning clamp seats 3, the distance between the two groups of positioning clamp seats 3 can be controlled by the adjusting screw 5, so as to clamp and fix the position of the spiral pump blank;

[0025] The positioning chassis 1 is provided with a limit block 6. The limit block 6 is provided with a limit groove 601 that can be embedded in the outer circumference of the middle part of the adjusting screw 5. Threads are provided on both the upper half 501 and the lower half 502 of the adjusting screw 5. The outer diameter of the middle part of the adjusting screw 5 is smaller than the outer diameters of its upper half 501 and lower half 502. Therefore, the movement of the adjusting screw 5 in the horizontal direction can be restricted through the limit groove 601 on the limit block 6.

[0026] Specifically, the positioning chassis 1 can be installed on the working platform, and its central axis position is fixed. When two groups of positioning clamp seats 3 are symmetrically arranged along its central axis, the two groups of positioning clamp seats 3 can be controlled to clamp the blank of the screw pump through the adjusting screw 5, and the central axis of the blank of the screw pump can be made to coincide with the symmetry axis of the two groups of positioning clamp seats 3, thereby ensuring the uniqueness of the central position of the blank of the screw pump.

[0027] The centering device for the blank of the screw pump in this technical solution is prepared by a combined structure. While ensuring the accuracy, it is also easy to disassemble and repair.

[0028] As described above, Figure 1 As shown, a plurality of support columns 7 with the tops flush with the bottoms of the profiling limit grooves 321 are provided on the positioning chassis 1, which are used to support the blank of the screw pump and keep it stable during the clamping and positioning process.

[0029] As described above, Figure 1 As shown, the mounting base 2 includes a mounting bottom block 21 and a mounting top block 22. The mounting top block 22 is connected to the mounting bottom block 21 and the positioning chassis 1 by bolts; the positioning clamp seat 3 includes a positioning bottom plate 31 and a positioning clamping plate 32 detachably connected to the positioning bottom plate 31 by bolts. The profiling limit groove 321 is provided on the positioning clamping plate 32.

[0030] As described above, the positioning bottom plate 31 is provided with a mounting limit groove 311, and the positioning clamping plate 32 is provided with a positioning convex portion 322 that can be embedded in the mounting limit groove 311, which provides positioning support for the assembly of the positioning bottom plate 31 and the positioning clamping plate 32 and facilitates the installation.

[0031] As Figure 1 shown, hexagonal grooves 503 are provided at both ends of the adjusting screw 5, which facilitates the operator to twist the adjusting screw 5 through tools such as a hexagonal wrench.

[0032] As described above, the two groups of mounting bases 2 are symmetrically arranged along the central axis of the adjusting screw 5.

[0033] Working principle: First, place the rough blank of the screw pump in the profiling limit grooves 321 on the two groups of positioning clamp seats 3, and make its outer periphery lap on the support columns 7; Since the thread directions of the upper half 501 and the lower half 502 of the adjusting screw 5 are opposite, by twisting the adjusting screw 5 forward or backward, the two groups of limit plates 4 can be driven to move synchronously towards or away from each other, thereby quickly and accurately completing the positioning operation of the rough blank of the screw pump.

[0034] Based on the ideal embodiments of the present invention as inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A centering device for a spiral pump blank, characterized in that: It includes a positioning chassis (1), two groups of mounting bases (2) detachably connected to the positioning chassis (1), and two groups of positioning clamp seats (3) oppositely arranged and slidably lapped on the tops of the mounting bases (2). A profiling limiting groove (321) is provided on the positioning clamp seat (3). Among them, a convex groove structure is formed by enclosing between the two groups of mounting bases (2) and the positioning chassis (1). A limiting plate (4) connected to the positioning clamp seat (3) is slidably connected in the convex groove structure. An adjusting screw rod (5) passes through the two groups of limiting plates (4). The upper half (501) and the lower half (502) of the adjusting screw rod (5) are respectively threadedly connected to the two groups of limiting plates (4), and the thread directions of the upper half (501) and the lower half (502) are opposite. A limiting block (6) is provided on the positioning chassis (1). A limiting groove (601) capable of being embedded in the outer periphery of the middle part of the adjusting screw rod (5) is provided on the limiting block (6).

2. The centering device for the spiral pump blank according to claim 1, characterized in that: A plurality of support columns (7) with the tops flush with the bottom of the profiling limiting groove (321) are provided on the positioning chassis (1).

3. The centering device for the spiral pump blank according to claim 1, characterized in that: The mounting base (2) includes a mounting bottom block (21) and a mounting top block (22). The mounting top block (22) is connected to the mounting bottom block (21) and the positioning chassis (1) by bolts.

4. The centering device for the spiral pump blank according to claim 1, characterized in that: The positioning clamp seat (3) includes a positioning bottom plate (31) and a positioning clamping plate (32) detachably connected to the positioning bottom plate (31) by bolts. The profiling limiting groove (321) is provided on the positioning clamping plate (32).

5. The centering device for the spiral pump blank according to claim 4, characterized in that: The positioning bottom plate (31) is provided with a mounting limiting groove (311). A positioning convex portion (322) capable of being embedded in the mounting limiting groove (311) is provided on the positioning clamping plate (32).

6. The centering device for the spiral pump blank according to claim 1, characterized in that: Hexagonal grooves (503) are provided at both ends of the adjusting screw rod (5).

7. The centering device for the spiral pump blank according to claim 1, characterized in that: The two groups of mounting bases (2) are symmetrically arranged along the central axis of the adjusting screw rod (5).

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