A device for installing a wind volume testing nozzle on a guide ring of a centrifugal fan

Abstract

The utility model discloses a kind of centrifugal fan air guide ring installation air volume test mouth's device, including draw tongue sliding table, upper push rod, thimble, air guide ring positioning support plate, upper push rod and rack;The upper portion of the cross section of draw tongue sliding table is the arc shape of projecting upwards, the top of draw tongue sliding table is equipped with vertical through-hole, lower push rod sleeve is set in through-hole and can move up and down, lower push rod top is equipped with vertical upwards thimble, thimble is used to pass through test mouth inner hole, the inside of draw tongue sliding table is equipped with vertical plane air guide ring positioning support plate;The draw tongue sliding table is connected with the transverse movement mechanism of rack;Thimble upper side is equipped with upper push rod.The utility model changes existing manual knock press mounting mode, compared with previous manual knock press mounting, product consistency is obviously improved, air nozzle, press pad appearance and direction are accurate, quality is stable, eliminate safety hazard, greatly improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal fan manufacturing technology, specifically relating to a device for installing an air volume test nozzle on the air guide ring of a centrifugal fan. Background Technology

[0002] Customers need to perform airflow tests when using centrifugal fans, which requires installing airflow test nozzles on the centrifugal fan's air guide ring. In existing technology, the test nozzles are placed in the test nozzle mounting holes of the air guide ring and installed by manually striking and pressing the test nozzles. This results in poor product consistency, unstable quality, low production efficiency, and safety hazards, which can easily lead to accidental injury. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a device for installing an air volume test nozzle on the air guide ring of a centrifugal fan, including a hook tongue slide, an upper push rod, a pin, an air guide ring positioning support plate, an upper push rod, and a frame;

[0004] The hook tongue slide is a horizontally arranged column with an upward-protruding arc at the top of its cross-section. The top of the hook tongue slide has a vertical through hole, and the lower push rod can move up and down within this through hole. The top of the lower push rod has a vertically upward-pointing pin, which is used to pass through the inner hole of the test nozzle. The air guide ring is fitted onto the hook tongue slide, and a vertically plane air guide ring positioning support plate is provided on the inner side of the hook tongue slide. The air guide ring positioning support plate is fixed to the frame.

[0005] The hook tongue slide is connected to the lateral movement mechanism mounted on the frame;

[0006] An upper push rod is provided above the ejector pin. The upper push rod is connected to the extension device. The upper push rod can reciprocate vertically under the action of the extension device.

[0007] Preferably, the upper push rod is the electric cylinder pressure head of a servo electric cylinder.

[0008] Preferably, the lateral movement mechanism includes a crank slide, a hook slide is located at the top of the crank slide, and a manual crank is provided at the rear end of the crank slide;

[0009] The crank slide includes a rotating shaft, a nut, and a connecting frame. The manual crank is connected to the rotating shaft, which has an external thread. The nut is threadedly connected to the rotating shaft, and the two move in a lead screw-nut manner. The nut is connected to the connecting frame, and the connecting frame is fixedly connected to the hook tongue slide.

[0010] Preferably, the crank slide is located in the slide positioning groove at the top of the slide support base; the top of the slide support base is provided with several positioning blocks, which are located on one side of the crank slide.

[0011] Preferably, the lower push rod is connected to an electric cylinder located at the bottom, and the electric cylinder is located on the connecting frame.

[0012] Preferably, it also includes a PLC control system and a PLC display, wherein the PLC control system is electrically connected to the servo electric cylinder and the electric pneumatic cylinder.

[0013] Preferably, the ejector pin and the lower push rod are connected by bolts.

[0014] Preferably, a guide ring placement platform is provided on one side of the guide ring positioning support plate.

[0015] Preferably, the air guide ring positioning support plate and the upper and lower push rod mounting base plate are made of high-strength impact-resistant material Cr12.

[0016] This utility model relates to a device for installing air volume test nozzles on the air guide ring of a centrifugal fan. It changes the existing manual hammering and pressing method. Compared with the previous manual hammering and pressing method, the product consistency is significantly improved, the appearance and direction of the air nozzle and the clamping gasket are accurate, the quality is stable, safety hazards are eliminated, and production efficiency is greatly improved. Attached Figure Description

[0017] Figure 1 This is a front view of the device for installing an air volume test nozzle on the centrifugal fan guide ring of this utility model.

[0018] Figure 2 This is a schematic diagram of the device (without the housing) for installing an air volume test nozzle on the centrifugal fan guide ring of this utility model.

[0019] Figure 3 This is an isometric view from another perspective of the device for installing an air volume test nozzle on the centrifugal fan guide ring of this utility model.

[0020] Figure 4 This is a structural diagram of the precision servo electric cylinder.

[0021] Figure 5 This is a structural diagram of the rocker arm slide section.

[0022] In the diagram: 1. Upper push rod, 2. Ejector pin, 3. Air guide ring positioning support plate, 4. Slide table support base, 5. Air guide ring placement platform, 6. Control box, 7. Frame, 8. PLC display, 9. Crank handle slide, 91. Positioning block, 92. Slide table positioning groove, 93. Rotating shaft, 94. Nut, 95. Connecting bracket, 10. C-shaped hook tongue, 11. Servo electric cylinder, 12. Manual crank handle, 13. Hook tongue slide, 14. Air guide ring. Detailed Implementation

[0023] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-5 As shown, the device for installing the air volume test nozzle on the centrifugal fan guide ring of this utility model includes a servo electric cylinder 11, a crank slide 9, a C-shaped hook tongue 10, a pin 2, a guide ring positioning support plate 3, a frame 7, a PLC display 8, a slide support base 4, a control box 6, and a hook tongue slide 13.

[0025] The electric cylinder head of the servo electric cylinder 11 is an upper push rod. The upper part of the hook tongue slide 13 is arc-shaped. The air guide ring 14 is sleeved on the hook tongue slide 13. The inner side of the hook tongue slide 13 is provided with an air guide ring positioning support plate 3. The hook tongue slide 13 is located on the top of the crank slide 9. The rear end of the crank slide 9 is provided with a manual crank 12. By rotating the manual crank 12, the hook tongue slide 13 can be controlled to move left and right along a straight line. The air guide ring 14 is sleeved on the arc surface of the hook tongue slide 13. The thicker side of the arc of the air guide ring 14 is close to the air guide ring positioning support plate 3. The crank slide 9 is located on the slide support base 4.

[0026] The hook tongue slide 13 has a lower push rod on its arc-shaped top, which is connected to the bottom electric cylinder, which is located on the crank handle slide 9. The lower push rod can move vertically up and down relative to the hook tongue slide 13. A pin 2 is mounted on the lower push rod, and the pin 2 is aligned vertically with the cylinder pressure head of the servo electric cylinder 11. During operation, the test nozzle positioning pin 2 passes through the inner hole of the test nozzle, with a hole-shaft fit accuracy within 0.05mm, ensuring a high degree of concentricity between the test nozzle and the air guide ring test nozzle mounting hole during installation. During installation, the test nozzle is positioned at the air guide ring test nozzle mounting hole. The pin 2 is bolted to the lower push rod, allowing for easy replacement if the pin 2 is damaged. The pin 2 is positioned using a shaft hole, preventing incorrect or mistaken installation. Operation is simple, and positioning and installation accuracy are guaranteed.

[0027] The slide support base 4, C-shaped hook tongue 10, air guide ring positioning support plate 3, and PLC display are all located on the frame 7.

[0028] By adjusting the manual crank 12, the air guide ring 14 is brought into full contact with the air guide ring positioning support plate 3. In this way, the air volume test nozzle of the air guide ring is positioned directly below the electric cylinder pressure head, and the bottom of the air guide ring 14 is kept in contact with the vertical air guide ring positioning support plate 3, keeping the air guide ring vertical and preventing tilting, thus ensuring the accurate installation position of the air volume test nozzle.

[0029] like Figure 4As shown: The precision servo electric cylinder 11 is the core component for press-fitting the test nozzle. It achieves different displacements according to the precision electrical control of the PLC. The cylinder head retracts and extends according to the time setting to complete the press-fitting of the test nozzle. The cylinder head is also the upper push rod. The displacement of the cylinder head can be adjusted according to product needs, with a displacement accuracy of 0.01mm. The press-fitting pressure is controllable, with strong stability, ensuring product consistency. Compared with the previous manual hammering press-fitting, it has a strong advantage and provides a high degree of guarantee in terms of safety, product consistency, and quality stability.

[0030] The shorter the movement time of the electric cylinder head, the greater the displacement of the electric cylinder head. The servo electric cylinder 11 is a product that is already available on the market. The structure and principle of the servo electric cylinder are not described in detail.

[0031] Test nozzle positioning pin 2: Pin 2 passes through the inner hole of the test nozzle, with a hole-shaft fit accuracy within 0.05mm, ensuring a high degree of concentricity between the test nozzle and the test nozzle mounting hole of the air guide ring during the installation process. The test nozzle is located at the round hole position of the air guide ring 14. Pin 2 is connected to the lower push rod with bolts, making it easy to replace if the pin is damaged. It is also positioned using a shaft hole to achieve error-proof and foolproof installation. The operation is simple and ensures positioning and installation accuracy.

[0032] The air guide ring positioning support plate and the upper and lower push rod mounting base plate are made of high-strength impact-resistant Cr12 material, which has strong stability. The surface is finely ground by a high-precision grinding machine, and the flatness accuracy reaches 0.01mm. Finally, it undergoes heat treatment and electroplating treatment to prevent rust, so as to extend the service life of the equipment and effectively reduce the failure rate and product stability during the pressing process.

[0033] The upper and lower push rods of this device are adjusted via an external display connected to a PLC control system. The displacement of the push rod pressure head is changed by adjusting the up and down time of the upper push rod, and the speed of the test nozzle pin extension is adjusted by adjusting the up and down time of the lower push rod, preventing accidental hand injury to employees. The overall operation allows real-time monitoring of the status of each push rod during the test nozzle pressing process. If the preset value is not reached, an alarm will be automatically triggered. It is also equipped with a test nozzle pressing counting function to prevent product omissions.

[0034] 9-inch crank slide Figure 5 As shown, eight precision positioning blocks 91 are fixedly connected to the base plate. The positioning blocks 91 are located on one side of the crank slide 9 to ensure the long-term stable operation accuracy of the crank slide 9, making the accuracy accurate and the adjustment convenient and safe. The base plate has a reserved overall slide positioning groove 92 to ensure that the installation accuracy meets the standard.

[0035] The crank slide 9 is located in the slide positioning groove 92. The crank slide 9 includes a rotating shaft 93, a nut 94 and a connecting frame 95. When the manual crank 12 is rotated, the rotating shaft 93 is driven to rotate. The rotation direction of the nut 94 is restricted, and it makes linear motion of the lead screw nut, producing left and right lateral motion.

[0036] The cylindrical part at the bottom of the ejector pin 2 is a push rod, located at the top of the hook tongue slide 13, and can move up and down relative to the hook tongue slide 13.

[0037] The bottom of the lower push rod is equipped with an electric cylinder or hydraulic cylinder to control the vertical linear movement of the lower push rod relative to the hook tongue slide 13; the electric cylinder or hydraulic cylinder is located on the connecting frame 95.

[0038] C-type hook tongue: The hook tongue is installed on the upper and lower push rods. It is manufactured in one piece to prevent the cumulative error caused by the processing and assembly of multiple parts from causing abnormal accuracy. The same reference is used when the upper and lower push rods are installed to ensure that the concentricity error of the two push rods is less than 0.01mm. The hook tongue and the lead screw crank slide are connected by multiple positioning to ensure operational reliability and accuracy stability.

[0039] The working principle of the device for installing the air volume test nozzle on the centrifugal fan guide ring is as follows:

[0040] 1. Turn on the power, set manual or automatic operation, set the downward time of the upper push rod (the shorter the time, the longer the stroke) and other parameters.

[0041] 2. Place the test nozzle on the lower push rod, and then put on the air guide ring.

[0042] 3. Loosen the wrench on the back of the machine counterclockwise, adjust the position of the push rod until the air guide ring base is in contact with the steel plate, and then tighten the wrench.

[0043] 3. Loosen the wrench on the back of the machine counterclockwise, adjust the position of the push rod until the air guide ring base is in contact with the steel plate, i.e., the air guide ring positioning support plate, and then tighten the wrench.

[0044] 4. Insert the clamping pad into the test nozzle (note that the pad should be concave downwards).

[0045] 5. Press down the pedal and push the lever down.

[0046] 6. Once the pressing is complete, the upper push rod moves upward and the lower push rod moves downward.

[0047] Its working process is as follows:

[0048] Step 1. Install the test nozzle to be installed onto the positioning pin 2 of the device, and then pass the test nozzle through the round hole of the air guide ring 14.

[0049] Step 2. Adjust the manual crank 12 until the air guide ring 14 is in full contact with the air guide ring positioning support plate 3.

[0050] Adjustment method:

[0051] 1. Release the manual crank handle quick clamping device, rotate the manual crank handle 12 clockwise, and the hook tongue slide 13 will move backward;

[0052] 2. Rotating the manual crank 12 counterclockwise will move the hook tongue slide 13 forward;

[0053] 3. Adjust the position of the hook tongue slide 13 back and forth until the air guide ring 14 is completely in contact with the air guide ring positioning support plate 3. After the position is determined, lock the crank handle quick clamping device.

[0054] Step 3. Based on the product size, height, thickness of the air guide ring substrate, production efficiency, and other information and requirements, set and adjust the parameters of the device. The specific method is as follows:

[0055] Status: Manual or Automatic

[0056] 1. Manual mode: In manual mode, the up and down displacement and speed of each push rod can be controlled by manually setting the time. The shorter the time, the greater the displacement distance of the upper push rod. Similarly, for the lower push rod, the shorter the time, the faster the up and down speed.

[0057] 1.1 The push rod (test nozzle positioning pin) moves downwards, with the speed controlled by time.

[0058] 1.2 The lower push rod (test nozzle positioning pin) moves upward, and the speed is controlled by time.

[0059] 1.3 The upper push rod (servo electric cylinder pressure head) moves upward, and the displacement is controlled by time.

[0060] 1.4 The upper push rod (servo electric cylinder pressure head) moves downward, and the displacement is controlled by time.

[0061] 2. Automatic mode: In automatic mode, the machine can be controlled to run automatically via a foot switch.

[0062] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A device for installing a flow rate test nozzle on a guide vane of a centrifugal fan, characterized in that: Includes hook tongue slide (13), upper push rod, ejector pin (2), air guide ring positioning support plate (3), lower push rod and frame (7); The hook tongue slide (13) is a horizontally extending column with an upward-protruding arc at the top of its cross-section; the top of the hook tongue slide (13) is provided with a vertical through hole, and the lower push rod is located in the through hole and can move up and down; the top of the lower push rod is provided with a vertically upward ejector pin (2), which is used to pass through the inner hole of the test nozzle; the air guide ring (14) is sleeved on the hook tongue slide (13), and the inner side of the hook tongue slide (13) is provided with a vertically plane air guide ring positioning support plate (3), which is fixed on the frame (7); The hook tongue slide (13) is connected to the transverse motion mechanism provided on the frame (7); An upper push rod is provided above the ejector pin (2); the upper push rod is connected to the extension device and can reciprocate vertically under the action of the extension device.

2. The device for mounting the air volume test nozzle of the air guide ring of the centrifugal fan according to claim 1, characterized in that: The upper push rod is the electric cylinder head of the servo electric cylinder (11).

3. The device for mounting the air volume test nozzle of the air guide ring of the centrifugal fan according to claim 2, characterized in that: The lateral motion mechanism includes a crank slide (9), a hook slide (13) located at the top of the crank slide (9), and a manual crank (12) at the rear end of the crank slide (9). The crank slide (9) includes a rotating shaft (93), a nut (94) and a connecting frame (95). The manual crank (12) is connected to the rotating shaft (93). The rotating shaft (93) is provided with an external thread. The nut (94) is threadedly connected to the rotating shaft (93), and the two move as a lead screw and nut. The nut (94) is connected to the connecting frame (95), and the connecting frame (95) is fixedly connected to the hook tongue slide (13).

4. The device for mounting the air volume test nozzle of the air guide ring of the centrifugal fan according to claim 3, characterized in that: The crank slide (9) is located in the slide positioning groove (92) at the top of the slide support base (4); the top of the slide support base (4) is provided with several positioning blocks (91), and the positioning blocks (91) are located on one side of the crank slide (9).

5. The device for mounting the air volume test nozzle of the air guide ring of the centrifugal fan according to claim 3, characterized in that: The lower push rod is connected to the electric cylinder located at the bottom, and the electric cylinder is located on the connecting frame (95).

6. The device for mounting the air volume test nozzle of the air guide ring of the centrifugal fan according to claim 5, characterized in that: It also includes a PLC control system and a PLC display (8), the PLC control system being electrically connected to the servo electric cylinder (11) and the electric cylinder.

7. The device for mounting the air volume test nozzle of the air guide ring of the centrifugal fan according to claim 1, characterized in that: The ejector pin (2) is connected to the lower push rod by bolts.

8. The device for mounting an air volume test nozzle to a centrifugal fan air guide ring of claim 1, wherein: A guide ring placement platform (5) is provided on one side of the guide ring positioning support plate (3).

9. The device for mounting an air volume test nozzle to a centrifugal fan air guide ring of claim 1, wherein: The air guide ring positioning support plate (3) and the upper and lower push rod mounting base plate are made of high-strength impact-resistant material Cr12.

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