A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump

Abstract

The utility model relates to the technical field of centrifugal pump processing tools, and discloses a tool for processing a multi-stage centrifugal pump pressure-resistant cylinder, including a tool bar, a nesting groove is provided at the top of one end of the tool bar, a blade is installed in the nesting groove by screws, an inverted T-shaped groove is provided inside one end of the tool bar, an inverted U-shaped bracket, a movable plate, a composite detection plate, and an inclined reset spring are installed inside the inverted T-shaped groove, and the middle part of the movable plate is installed on the top of the inverted U-shaped bracket through a bearing. The utility model forms a processing warning structure by providing an inverted U-shaped bracket, a movable plate, and a composite detection plate. After the blade and the screws between the blade and the tool bar become loose, the movable plate, supported by the inverted U-shaped bracket, violently strikes the detection plate at the bottom of the composite detection plate, generating a crisp and obvious abnormal sound, thereby creating favorable conditions for users to timely discover poor processing and reduce poor processing.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pump machining tools, in particular to a tool for machining a pressure-resistant cylinder of a multi-stage centrifugal pump. Background Art

[0002] A multistage centrifugal pump is a medium conveying device in which the flowing medium (gas and liquid, or a mixture of suspended particles and gas or liquid) enters from the root of the blade shaft (inlet), and the medium obtains centrifugal force by the high-speed rotating blades, generating a high pressure, and flows out from the pressure relief port (outlet). Compared with traditional centrifugal pumps, it has the advantages of a wider range of uses and low operating costs.

[0003] As the demand for use increases, the existing multi-stage centrifugal pump technology also needs to be continuously improved, and the optimization of the pressure-resistant cylinder processing, one of the important internal structures of the multi-stage centrifugal pump, is the main direction. For example, the current application number is CN202310378318.2, and the subject name is a public patent for a stainless steel stamping and welding vertical multi-stage centrifugal pump pressure-resistant cylinder processing tool and processing method. It proposes that "the tool body module adopts an inlaid structure, and the tool body module and the blade can be replaced without disassembling the main tool body, thereby reducing the production and maintenance costs of the tool and increasing the service life of the tool." From a technical point of view, it can be seen that the focus of the improvement of the above patent is placed on the tool for processing the pressure-resistant cylinder of the multi-stage centrifugal pump. However, the modular blade inlay setting is a technology that has long been used in actual processing. The actual problem with the tool is that the blade and the tool rod are inlaid and locked with screws. In the subsequent long-term processing process, the screws and blades will become loose due to vibration. If it is not discovered in time, poor processing will occur or even the workpiece will be scrapped. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a tool for machining a pressure-resistant cylinder of a multi-stage centrifugal pump, which solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solution: a tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump, comprising a tool rod, a nesting groove is provided at the top of one end of the tool rod, a blade is installed in the nesting groove by means of screws, an inverted T-shaped groove is provided inside one end of the tool rod and communicates with the nesting groove, an inverted U-shaped bracket, a movable plate, a composite detection plate, and an inclined reset spring are installed inside the inverted T-shaped groove, and the middle part of the movable plate is installed on the top of the inverted U-shaped bracket through a bearing;

[0006] One end of the movable plate is fitted and connected to the bottom surface of one end of the blade, and the two ends of the tilting return spring are respectively connected to the surface of the other end of the movable plate and the inner wall of the middle part of the inverted T-shaped groove, and the tilting return spring is in a stretched and expanded state;

[0007] The bottom surface of the composite detection plate is in contact with the surface of the other end of the movable plate, and a crisp metallic sound is produced when the bottom of the composite detection plate is knocked.

[0008] Selected, the composite detection plate is mainly composed of a sealing plate, a detection plate and a fixing rod, the fixing rod is installed between the sealing plate and the detection plate, the detection plate is composed of materials including copper, stainless steel and nickel alloy metal, the bottom surface of the detection plate and the top surface of the other end of the movable plate.

[0009] Preferably, a transition sleeve is installed at the bottom of the sealing plate by screws, and the transition sleeve is fixedly sleeved on the inner side of the top of one side of the inverted T-shaped groove.

[0010] Preferably, the top surface of the sealing plate is coplanar with the top surface of the knife rod, a sealing ring is embedded in the surface of the sealing plate, and the sealing ring is fitted and connected with the top inner wall of one side of the inverted T-shaped groove.

[0011] Preferably, the tops of both ends of the movable plate are semi-cylindrical structures, and the movable plate is rotated and adjusted inside the inverted T-shaped groove with the top structure of the inverted U-shaped bracket as the central axis.

[0012] Preferably, the surface of the other end of the movable plate is connected with a linkage plate, a buffer component is sleeved inside one side of the inverted T-shaped groove, and the top of the buffer component is movably connected to the bottom of one end of the linkage plate.

[0013] The buffer component is mainly composed of a damping block and a buffer spring. The top of the damping block is fitted and connected to the bottom of a section of the linkage plate. The two ends of the buffer spring are respectively connected to the bottom of the damping block and the inner wall of one side of the inverted T-shaped groove.

[0014] Preferably, a clearance hole is opened on the surface of the damping block, a limiting rod is clamped inside the clearance hole, and one end of the limiting rod is fixedly connected to the inner wall of one side of the inverted T-shaped groove.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model forms a processing warning structure by providing an inverted U-shaped bracket, a movable plate, and a composite detection plate. After the blade and the screws between the blade and the knife rod become loose, the movable plate, supported by the inverted U-shaped bracket, violently strikes the detection plate at the bottom of the composite detection plate, generating a crisp and obvious abnormal sound, thereby creating favorable conditions for users to discover poor processing in time and reduce the poor processing rate.

[0017] 2. The utility model forms a buffer structure by providing a buffer component and a linkage plate, and then after being used in conjunction with the above-mentioned processing warning structure combination, it can buffer the vibration suffered by the blade in the early stage of use of the tool rod and the blade, thereby reducing the probability of the blade and the screws between the blade and the tool rod becoming loose. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a partial cross-sectional schematic diagram of the structure of the utility model;

[0020] Figure 3 It is an enlarged schematic diagram of the structural movable plate of the utility model;

[0021] Figure 4 It is an enlarged schematic diagram of the structural composite detection plate of the utility model;

[0022] Figure 5 The utility model structure Figure 2 A magnified schematic diagram of center A.

[0023] In the figure: 1. knife bar; 2. nesting groove; 3. blade; 4. inverted T-slot; 5. inverted U-shaped bracket; 6. movable plate; 7. composite detection plate; 71. sealing plate; 72. detection plate; 73. fixing rod; 8. tilt return spring; 9. buffer component; 91. damping block; 92. buffer spring; 93. restraining rod; 10. linkage plate; 11. transition sleeve. DETAILED DESCRIPTION

[0024] 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 in 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.

[0025] See also Figure 1-5 A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump, comprising a tool bar 1, a nesting groove 2 is provided at the top of one end of the tool bar 1, a blade 3 is installed in the nesting groove 2 by means of screws, an inverted T-shaped groove 4 is provided inside one end of the tool bar 1 and communicates with the nesting groove 2, an inverted U-shaped bracket 5, a movable plate 6, a composite detection plate 7, and an inclined return spring 8 are installed inside the inverted T-shaped groove 4, and the middle part of the movable plate 6 is installed on the top of the inverted U-shaped bracket 5 through a bearing;

[0026] One end of the movable plate 6 is fitted and connected to the bottom surface of one end of the blade 3, and the two ends of the tilting return spring 8 are respectively connected to the surface of the other end of the movable plate 6 and the inner wall of the middle part of the inverted T-shaped groove 4, and the tilting return spring 8 is in a stretched and expanded state;

[0027] The tops of both ends of the movable plate 6 are semi-cylindrical structures, which are convenient for tilting and protruding, and the movable plate 6 is rotated and adjusted inside the inverted T-shaped groove 4 with the top structure of the inverted U-shaped bracket 5 as the central axis;

[0028] The bottom surface of the composite detection plate 7 is connected to the surface of the other end of the movable plate 6, and the bottom of the composite detection plate 7 produces a crisp metallic sound when knocked;

[0029] The composite detection plate 7 is mainly composed of a sealing plate 71, a detection plate 72 and a fixing rod 73. The fixing rod 73 is installed between the sealing plate 71 and the detection plate 72. The detection plate 72 is made of copper, stainless steel and nickel alloy metal. After being knocked, it makes a crisp sound that is easy to distinguish. The bottom surface of the detection plate 72 and the top surface of the other end of the movable plate 6 are

[0030] In order to create convenient installation and disassembly conditions, a transition sleeve 11 is installed at the bottom of the sealing plate 71 by screws. The transition sleeve 11 is fixedly sleeved on the top inner side of one side of the inverted T-shaped groove 4. In order to avoid structural interference, the top surface of the sealing plate 71 is coplanar with the top surface of the knife rod 1. A sealing ring is embedded on the surface of the sealing plate 71. The sealing ring is fitted and connected to the top inner wall of one side of the inverted T-shaped groove 4, thereby improving the sealing effect of the sealing plate 71 on the open space of the inverted T-shaped groove 4;

[0031] The surface of the other end of the movable plate 6 is connected with a linkage plate 10, and a buffer component 9 is installed inside one side of the inverted T-shaped groove 4. The top of the buffer component 9 is movably connected to the bottom of one end of the linkage plate 10. The buffer component 9 is mainly composed of a damping block 91 and a buffer spring 92. The top of the damping block 91 is fitted and connected to the bottom of a section of the linkage plate 10. The two ends of the buffer spring 92 are respectively connected to the bottom of the damping block 91 and the inner wall of one side of the inverted T-shaped groove 4. The buffer component 9 and the linkage plate 10 are used in combination with the movable plate 6, and then the movable plate 6 is used as a buffer bridge to synchronously press and buffer the blade 3 using vibration energy;

[0032] To further ensure the stability of the reciprocating movement of the damping block 91 and the reliability of buffering, a clearance hole is opened on the surface of the damping block 91, and a limit rod is clamped inside the clearance hole. One end of the limit rod is fixedly connected to the inner wall of one side of the inverted T-shaped groove 4.

[0033] Working principle:

[0034] Embodiment 1

[0035] During the processing of the pressure-resistant cylinder of the multi-stage centrifugal pump by the blade 3 and the tool rod 1, the movable plate 6 is simultaneously compressed by the vibrations suffered by the blade 3 and the screws between the blade 3 and the tool rod 1 and the vibrations are transmitted to the damping block 91 and the buffer spring 92 inside the buffer component 9. Then the damping block 91 and the constraint rod 93 respectively perform damping and buffering and reciprocating deformation buffering of the elastic structure, and the constraint rod 93 limits the reciprocating movement of the damping block 91.

[0036] Embodiment 2

[0037] During the process of the blade 3 and the tool bar 1 processing the multi-stage centrifugal pump pressure-resistant cylinder, the movable plate 6 is simultaneously compressed and transmitted to the damping block 91 and the buffer spring 92 inside the buffer component 9 for the vibrations suffered by the blade 3 and the screws between the blade 3 and the tool bar 1. Then the damping block 91 and the restraining rod 93 respectively perform damping and buffering and reciprocating deformation buffering of the elastic structure, and the restraining rod 93 limits the reciprocating movement of the damping block 91;

[0038] However, as the buffering component 9 fails to work after being used for too long, the blade 3 and the screws between the blade 3 and the shank 1 become loose, the vibration suffered by the movable plate 6 will further increase, causing a larger knock on the detection plate 72 at the bottom of the composite detection plate 7, producing a crisp and obvious abnormal sound, creating favorable conditions for users to discover processing defects in time, thereby reducing the processing defect rate.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. At the same time, in the drawings of the present utility model, the fill pattern is only for distinguishing the layers, without any other limitation.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump, comprising a tool bar (1), a nesting groove (2) is provided at the top of one end of the tool bar (1), a blade (3) is installed in the nesting groove (2) by means of a screw, and is characterized in that: An inverted T-shaped groove (4) communicating with the nesting groove (2) is formed inside one end of the knife rod (1); an inverted U-shaped bracket (5), a movable plate (6), a composite detection plate (7), and an inclined return spring (8) are mounted inside the inverted T-shaped groove (4); and the middle portion of the movable plate (6) is mounted on the top of the inverted U-shaped bracket (5) via a bearing; One end of the movable plate (6) is fitted and connected to the bottom surface of one end of the blade (3), and the two ends of the tilting return spring (8) are respectively connected to the surface of the other end of the movable plate (6) and the inner wall of the middle part of the inverted T-shaped groove (4), and the tilting return spring (8) is in a stretched and expanded state; The bottom surface of the composite detection plate (7) is fitted and connected to the surface of the other end of the movable plate (6), and the bottom of the composite detection plate (7) produces a crisp metallic sound when struck.

2. A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 1, characterized in that: The composite detection plate (7) is mainly composed of a sealing plate (71), a detection plate (72) and a fixing rod (73); the fixing rod (73) is installed between the sealing plate (71) and the detection plate (72); the detection plate (72) is made of copper, stainless steel and nickel alloy metal; the bottom surface of the detection plate (72) is connected to the top surface of the other end of the movable plate (6).

3. A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 2, characterized in that: A transition sleeve (11) is mounted on the bottom of the sealing plate (71) by means of screws, and the transition sleeve (11) is fixedly sleeved on the inner side of the top of one side of the inverted T-shaped groove (4).

4. A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 2, characterized in that: The top surface of the sealing plate (71) is coplanar with the top surface of the knife rod (1), a sealing ring is embedded in the surface of the sealing plate (71), and the sealing ring is fitted and connected to the top inner wall of one side of the inverted T-shaped groove (4).

5. The tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 1, characterized in that: The tops of both ends of the movable plate (6) are semi-cylindrical structures, and the movable plate (6) is rotatably adjusted inside the inverted T-shaped groove (4) with the top structure of the inverted U-shaped bracket (5) as the central axis.

6. The tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 1, characterized in that: The surface of the other end of the movable plate (6) is connected to a linkage plate (10), and a buffer component (9) is sleeved inside one side of the inverted T-shaped groove (4), and the top of the buffer component (9) is movably connected to the bottom of one end of the linkage plate (10).

7. A tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 6, characterized in that: The buffer component (9) mainly consists of a damping block (91) and a buffer spring (92); the top of the damping block (91) is fitted and connected to the bottom of a section of the linkage plate (10); and the two ends of the buffer spring (92) are respectively connected to the bottom of the damping block (91) and the inner wall of one side of the inverted T-shaped groove (4).

8. The tool for processing a pressure-resistant cylinder of a multi-stage centrifugal pump according to claim 7, characterized in that: A clearance hole is provided on the surface of the damping block (91), a limiting rod is clamped inside the clearance hole, and one end of the limiting rod is fixedly connected to the inner wall of one side of the inverted T-shaped groove (4).

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