Quantitative detection tool for compression of wear ring cover
By designing a quantitative detection tool for detecting the compression degree of the port ring cover of the multi-stage centrifugal pump, using the tensile testing machine and the jaw structure, the problem of lack of effective detection methods in the prior art is solved, and the accuracy and safety of the counterpart ring cover is achieved is improved.
Patent Information
- Application Number
- CN202421067135.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-16
AI Technical Summary
The prior art lacks effective methods to detect the tightness of the mouth ring cover of the multi-stage centrifugal pump, resulting in problems such as the mouth ring falling off and crushing, affecting the normal operation of the pump.
A quantified testing tool for the compression of the annular cover is designed. By quantifying the tightness of the annular cover, the precise measurement of the compression of the annular cover is achieved.
Through this testing tool, the tightness of the inspection port ring cover can be quantified, the damage of the guide vane during the fall and knocking process is avoided, the accuracy and safety of the detection are improved, and the service life of the tool is extended.
Smart Images
Figure CN222689551U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of centrifugal pump mouth ring detection, in particular to a mouth ring cover compression quantitative detection tool. Background Art
[0002] In order to reduce the internal leakage loss of multi-stage centrifugal pumps during operation, the guide vanes, the core hydraulic parts, adopt a floating ring structure design to ensure the sealing at the impeller inlet, where the ring is pressed onto the ring seat by the ring cover. However, the tightness of the ring cover after press-fitting (too loose or too tight) will affect the normal use of the ring, and in severe cases, it may even cause the ring to fall off or be crushed, leading to pump noise, parts damage and other problems. At present, in the actual production and testing process, the quality of the parts is determined only by knocking and hitting the guide vanes to see if they fall off. There is a lack of effective, reasonable and quantifiable technical means to detect the tightness of the ring cover.
[0003] Terminology explanation:
[0004] Mouth ring cover: a part used to fix on the mouth ring seat to prevent the mouth ring from falling off;
[0005] Mouth ring: A floating sealing part used to ensure the floating sealing between the impeller and the guide vane.
[0006] Guide vane: It is the energy conversion device of the centrifugal pump. Its function is to collect the liquid thrown out by the impeller, reduce the flow rate of the liquid, convert part of the velocity energy head into pressure energy head, and then evenly introduce it to the next stage or discharge it through the diffuser;
[0007] Tensile testing machine: Tensile testing machine mainly tests the mechanical properties of materials by stretching the specimen. The testing machine is generally composed of a host, control system, detection system, fixture, etc.
[0008] Positioning: Before the workpiece is processed, it must first be placed in a correct position on the machine tool or in the fixture. This process is called positioning.
[0009] Clamping: In order to prevent the positioned workpiece from being displaced under the action of force and to keep it in the correct position during the processing, the workpiece must be clamped firmly. This process is called clamping. Utility Model Content
[0010] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a mouth ring cover compression quantitative detection tool and detection method. By introducing a tensile testing machine and designing a tool for connecting the instrument and parts, quantitative detection of the tightness of the mouth ring cover is achieved.
[0011] The purpose of the utility model is to achieve the following technical solution: a ring cover compression quantitative detection tool, comprising:
[0012] A positioning plate, which can be detachably mounted on the base and is used to position and install the guide vane;
[0013] The clamping bolt is detachably mounted on the positioning plate and is used to clamp the guide vane;
[0014] A tension testing machine is fixed on the base, the tension testing machine is provided with a clamping jaw, and the clamping jaw is located above the guide vane, the tension value of the clamping jaw is detected by the tension testing machine and displayed in real time on the display screen of the tension testing machine, and the tension testing machine is provided with a hand wheel for driving the clamping jaw to move up and down relative to the guide vane; and
[0015] A claw, one end of which is clamped by a clamping jaw, and the other end of which is used to pull out the mouth ring cover of the guide vane.
[0016] As a further technical solution, the clamping claw includes a left half and a right half, and the left half and the right half are both composed of a chuck and an elastic sheet hinged on the chuck. The chucks of the left half and the right half are fitted to the rear end surfaces and fixed by welding. The elastic sheet is provided with an arc for clamping into the gap between the inlet ring cover and the guide vane.
[0017] As a further technical solution, a boss is provided on the positioning plate, and the guide vane is snapped into the boss to achieve positioning.
[0018] As a further technical solution, a hollow groove is provided on the lower end surface of the positioning plate to form a gap between the positioning plate and the base.
[0019] As a further technical solution, the base is provided with fixing bolts, and the fixing bolts fix the base and the positioning plate in reverse.
[0020] The beneficial effects of the utility model are:
[0021] 1. The introduction of a tensile testing machine can quantify the tightness of the outlet ring cover, making the inspection process more reliable and avoiding damage to the guide vane during falling or knocking;
[0022] 2. Welding the ends of the clamping jaws together allows the clamping jaws to clamp the clamping jaws directly, and use the arc locking force of the clamping jaws to clamp the ring cover, so there is no need to design a sheet material for fixing and positioning the clamping jaws, which improves the accuracy of the tooling and reduces the loss of force in the transmission process;
[0023] 3. Use the M6 bolts (tightening bolts) that come with the tooling to reversely install and connect the tooling base and the positioning plate, which reduces the processing of the tooling itself, improves the accuracy and life of the tooling, and also reduces the offset of the positioning plate when removing and replacing the guide vanes;
[0024] 4. The center of the positioning plate is hollowed out to reduce the impact of uneven tooling base on the accuracy and stability of the positioning plate;
[0025] 5. Locate the installation dimensions of the parts and reduce the height of the positioning boss to facilitate the replacement of parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 .
[0027] Figure 2 It is a schematic cross-sectional structure diagram of the utility model (hiding the tensile testing machine and the upper half of the clamping claw).
[0028] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 .
[0029] Figure 4 for Figure 2 A partial enlarged schematic diagram of area A in the middle.
[0030] Explanation of the accompanying drawings: display screen 1, clamping jaw 2, hand wheel 3, clamping jaw 4, left half 41, right half 42, chuck 43, elastic sheet 44, mouth ring cover 5, guide vane 6, clamping bolt 7, fixing bolt 8, positioning plate 9, boss 91, hollow groove 92, base 10, tensile testing machine 11. DETAILED DESCRIPTION
[0031] The utility model will be described in detail below with reference to the accompanying drawings:
[0032] Embodiment 1: As attached Figures 1 to 4 As shown, a tool for quantitative detection of the tightening of a mouth ring cover includes a display screen 1, a clamping jaw 2, a hand wheel 3, a clamping jaw 4, a left half 41, a right half 42, a chuck 43, an elastic sheet 44, a mouth ring cover 5, a guide vane 6, a clamping bolt 7, a fixing bolt 8, a positioning plate 9, a boss 91, a hollow groove 92, a base 10 and a tensile testing machine 11.
[0033] Reference Figure 1 , 4 A cylindrical boss 91 is provided at the center of the positioning plate 9, and the lower end of the guide vane 6 is inserted into the boss 91 for positioning. Preferably, the height of the boss 91 matches the depth of the groove at the lower part of the guide vane. The installation dimensions of the guide vane 6 are used for positioning, and the height of the boss 91 is reduced to facilitate the replacement of the guide vane 6. A fixing bolt 8 (M6 bolt) is preset on the base 10. When in use, the base 10 and the positioning plate 9 are reversely fixed by the fixing bolt 8 (that is, the head of the fixing bolt 8 is located at the lower end surface of the fixing base 10), so that the positioning plate 9 can be detachably installed on the base 10.
[0034] like Figure 1 , 2As shown, screw holes are opened on both sides of the positioning plate 9, and two clamping bolts 7 (using M20 bolts) are detachably installed in the corresponding screw holes on the positioning plate 9. After the guide vane 6 and the positioning plate 9 are positioned, the clamping bolts 7 are tightened, and the guide vane 6 is clamped using the lower edge of the clamping bolts 7.
[0035] Reference Figure 2 , 3 The clamping jaw 4 includes a left half 41 and a right half 42, and the left half 41 and the right half 42 are each composed of a clamp 43 and an elastic sheet 44 hinged on the clamp 43. When in use, the clamps 43 of the left half 41 and the right half 42 are welded and fixed to the rear end surface, the upper end of the clamping jaw 4 is controlled and clamped by the clamping jaw 2, and the lower end of the clamping jaw 4 is used to pull out the mouth ring cover 5 of the guide vane 6. Preferably, the elastic sheet 44 has a certain curvature, and the locking force formed by the curvature can clamp the gap between the mouth ring cover 5 and the guide vane 6, effectively preventing the clamping jaw 4 from being separated from the mouth ring cover 5 during the pulling process.
[0036] Further, such as Figure 1 , 3 As shown, the tension testing machine 11 is fixedly mounted on the base 10, and the tension testing machine 11 has a clamping jaw 2 at the bottom, and the clamping jaw 2 is located above the guide vane 6. The tension value of the clamping jaw 2 on the clamping jaw 4 is detected in real time by the tension testing machine 11 and displayed on the display screen 1 of the tension testing machine 11. The tension testing machine 11 is also provided with a hand wheel 3, which can drive the clamping jaw 2 to move up and down relative to the guide vane 6.
[0037] Preferably, if Figure 2 , 4 As shown, a hollow groove 92 is provided on the lower end surface (center position) of the positioning plate 9 to form a gap between the positioning plate 9 and the base 10, thereby preventing the accuracy and stability of the positioning plate 9 from being affected by the unevenness of the instrument base.
[0038] Embodiment 2: A method for quantitatively detecting the tightness of a mouth ring cover, using the tooling for quantitatively detecting the tightness of a mouth ring cover described in Embodiment 1, comprising the following steps:
[0039] Step 1: Fix the positioning plate 9 on the base 10 by fixing bolts 8;
[0040] Step 2: Place the guide vane 6 on the boss 91 of the positioning plate 9, tighten the clamping bolts 7 on both sides of the positioning plate 9, and press the guide vane 6 onto the positioning plate 9 through the lower edge of the clamping bolts 7;
[0041] Step 3: First, fit the end faces of the left half 41 (chuck 43) of the clamping jaw 4 to the end faces of the right half 42 (chuck 43), and then weld them to fix them, and then use the clamping jaw 2 to clamp the clamping jaw 4 to complete the connection between the clamping jaw 2 and the clamping jaw 4;
[0042] Step 4: Shake the hand wheel 3 to drive the claw 4 to descend to a suitable position, clamp the elastic sheet 44 of the claw 4 into the gap between the bottom of the mouth ring cover 5 and the guide vane 6, and use the curvature of the elastic sheet 44 to generate a locking force, thereby clamping the gap between the mouth ring cover 5 and the guide vane 6, effectively preventing the claw 4 from separating from the mouth ring cover 5 during the pulling process, and then shake the hand wheel 3 in the opposite direction to move the claw 4 upward until the mouth ring cover 5 separates from the guide vane 6. At this time, observe and record the tension value shown on the display screen 1 to complete the measurement process;
[0043] Step 5: After the measurement is completed, loosen the clamping bolts 7 on both sides of the positioning plate 9 (tighten three to five screws), remove the guide vane 6 from the positioning plate 9, and complete the unloading process. After replacing the guide vane 6, repeat the above steps to continue the test.
[0044] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.
Claims
1. A tool for quantitative detection of ring cover compression, characterized in that: include: A positioning plate (9) is detachably mounted on the base (10) and is used for positioning and installing the guide vane (6); A clamping bolt (7) is detachably mounted on the positioning plate (9) and is used to clamp the guide vane (6); A tension testing machine (11) is fixed on the base (10), the tension testing machine (11) is provided with a clamping jaw (2), and the clamping jaw (2) is located above the guide vane (6), the tension value of the clamping jaw (2) is detected by the tension testing machine (11), and is displayed in real time on a display screen (1) of the tension testing machine (11), and a hand wheel (3) is provided on the tension testing machine (11) for driving the clamping jaw (2) to move up and down relative to the guide vane (6); and A clamping claw (4) has one end clamped by the clamping claw (2) and the other end used to pull out the mouth ring cover (5) of the guide vane (6).
2. The ring cover compression quantitative detection tool according to claim 1, characterized in that: The clamping claw (4) comprises a left half (41) and a right half (42), and the left half (41) and the right half (42) are both composed of a clamping head (43) and an elastic sheet (44) hinged on the clamping head (43). The clamping heads (43) of the left half (41) and the right half (42) are fixed by welding to the rear end surfaces, and the elastic sheet (44) is provided with an arc for clamping into the gap between the inlet ring cover (5) and the guide vane (6).
3. The ring cover compression quantitative detection tool according to claim 2, characterized in that: A boss (91) is provided on the positioning plate (9), and the guide vane (6) is snapped into the boss (91) to achieve positioning.
4. The ring cover compression quantitative detection tool according to claim 3, characterized in that: A hollow groove (92) is provided on the lower end surface of the positioning plate (9), so that a gap is formed between the positioning plate (9) and the base (10).
5. The ring cover compression quantitative detection tool according to claim 4, characterized in that: The base (10) is provided with fixing bolts (8), and the fixing bolts (8) fix the base (10) and the positioning plate (9) in opposite directions.