Balanced plug installation device

Abstract

This invention discloses a balancing plug installation device, including a connector, a fixing member, and an operating rod. The fixing member includes a rod and a head, the rod having external threads. One end of the connector has a slotted head that mates with the slotted groove of the balancing plug, and the other end is a connecting end that connects to the operating rod. The connector has a through hole along its axis, penetrating the slotted head and the connecting end. The through hole includes a threaded connecting hole, a non-circular limiting through hole, and a rod protrusion hole connected in sequence. The length of the slotted head is greater than the depth of the slot, and the length of the rod is greater than the sum of the length of the slotted head and the depth of the slot. The rod is used to pass through the rod protrusion hole and connect to the internal threaded hole of the balancing plug. When the rod is connected to the internal threaded hole, and the end of the slotted head abuts against the slot, the distance between the head and the bottom surface of the limiting through hole is greater than the depth of the slot. When the head abuts against the bottom surface of the limiting through hole, the slotted head is completely disengaged from the slot. This invention has the advantages of simple operation and effectively improving installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of on-site dynamic balancing testing equipment technology, specifically a balancing screw installation device. Background Technology

[0002] Heavy-duty gas turbines are core equipment in power generation and drive systems, requiring extremely high safety and reliability. Rotor vibration is a common problem in engineering practice; therefore, gas turbines typically need to have on-site dynamic balancing capabilities.

[0003] On-site dynamic balancing requires screwing the balance plug into a special threaded hole on the rotor. Due to the limitations of the unit's structure, this operation usually needs to be performed by an operator outside the unit using a special long-handled tool, without opening the cylinder. Currently, the installation efficiency of the balance plug is one of the key factors affecting the entire dynamic balancing cycle.

[0004] However, under current technological conditions, remote installation using long-pole tools faces the following specific operational challenges: To ensure that the balance plug does not fall off during long-distance transport, it is often necessary to pre-fix it (such as by simple clamping). However, this method often affects the degree of freedom of the end of the balance plug, making it difficult to quickly and accurately align with the rotor threaded hole, resulting in repeated operations and low efficiency.

[0005] Installing the balance plug (usually a right-hand thread) requires rotating the tool clockwise. After installation, if the tool is rotated counterclockwise to remove it, there is a risk of accidentally loosening the already tightened balance plug, which seriously affects the reliability and safety of the operation.

[0006] Therefore, how to design an installation device that is easy to operate and can simultaneously solve the problems of preventing screw plugs from falling off, easy alignment, and safe disassembly of tools, so as to effectively improve installation efficiency and reliability, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a balance screw installation device that is simple in structure, easy to operate, and can significantly improve the installation efficiency of the balance screw, in order to address the shortcomings of the existing technology.

[0008] The technical objective of this invention is achieved through the following technical solution: A balance plug mounting device includes a connector, a fixing component, and an operating rod. One end of the balance plug has a slot, and the center of the slot bottom has an internal threaded hole. The fixing component includes a rod and a head, the rod having external threads. One end of the connector has a protruding head for engaging with the slot, and the other end is a connecting end for connecting to the operating rod. The connector has a through hole along its axis, penetrating the protruding head and the connecting end. The through hole includes a threaded connecting hole, a non-circular limiting through hole, and a rod protrusion hole connected sequentially. The diameter of the threaded hole is greater than the diameter of the limiting through hole, which is greater than the diameter of the rod protrusion hole. The length of the protruding head is greater than the depth of the slot. The axial length of the hole is greater than the depth of the slot, and the length of the rod is greater than the sum of the length of the slot and the depth of the slot. The rod is used to pass through the rod protrusion hole and connect to the internal threaded hole. The shape of the head matches the limiting through hole so as to be constrained to rotate circumferentially within the limiting through hole groove. The connecting part of the operating rod is threadedly connected to the threaded connection hole. When the rod of the fixing member is connected to the internal threaded hole and the end of the slot abuts in the slot, the distance between the head and the bottom surface of the limiting through hole is greater than the depth of the slot. When the head of the fixing member abuts in the bottom surface of the limiting through hole, the slot of the connector is completely disengaged from the slot of the balance screw.

[0009] Preferably, both the external thread of the rod and the thread of the internal threaded hole are left-hand threads. Preferably, the outer side of the balance plug is a right-hand external thread; the internal thread of the connector end is a right-hand thread.

[0010] Preferably, the opening shape of the limiting through hole is square, and correspondingly, the head is square and matches the limiting through hole.

[0011] Preferably, the end of the operating lever away from the connecting part is provided with an operating handle.

[0012] Preferably, there are two operating handles, which are symmetrically arranged on the operating lever.

[0013] Preferably, the operating lever is composed of multiple lever segments detachably connected together.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves integrated operation of pre-installed anti-dislodgement of the balance plug, efficient torque transmission, and convenient and safe disassembly through a connector, a fixing component, and an operating rod. By using the fixing component to connect to the plug through the connector's through-hole, the problem of plugs easily falling off and being difficult to align during long-distance transportation is solved. By defining the key length and distance relationships of the connector's slotted head, the fixing component's rod, and the head, it is ensured that after installation, the connector can be separated from the plug first by simply lifting and rotating the operating rod in one direction, and then the fixing component can be safely unscrewed. The entire process only requires clockwise rotation, completely avoiding the risk of accidentally loosening the already installed plug. This significantly improves the efficiency, reliability, and operational safety of on-site dynamic balancing adjustment under non-cylinder-opening conditions in gas turbines. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A partial cross-sectional view of the structure when used in conjunction with the balance screw plug; Figure 3 This is a three-dimensional structural diagram of the control lever 3; Figure 4 This is a three-dimensional structural diagram of connector 1; Figure 5 This is a cross-sectional view of connector 1; Figure 6 This is a three-dimensional structural diagram of fastener 2; Figure 7 This is a three-dimensional structural diagram of the balance screw 4.

[0016] Reference numerals: 1—Connector; 11—Slotted head; 12—Connecting end; 13—Through hole; 131—Threaded connection hole; 132—Limiting through hole; 133—Rod protrusion hole; 2—Fixed part; 21—Rod; 22—Head; 3—Operating lever; 31—Connecting part; 32—Operating handle; 4—Balance plug; 41—Slotted groove; 42—Internal threaded hole. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] like Figure 1 — Figure 7 As shown, a balancing screw plug installation device includes a connector 1, a fixing member 2, and an operating rod 3; one end of the balancing screw plug 4 has a slot 41, and the center of the slot bottom of the slot 41 has an internal threaded hole 42; the fixing member 2 includes a rod 21 and a head 22, and the rod 21 has an external thread; one end of the connector 1 has a slotted head 11 for engaging with the slotted head 41, and the other end is a connecting end 12 for connecting with the operating rod 3; the connector 1 has a through hole 13 along the axis through the slotted head 11 and the connecting end 12, and the through hole 13 includes a threaded connecting hole 131, a non-circular limiting through hole 132, and a rod protrusion hole 133 connected in sequence; the diameter of the threaded hole 131 is greater than the diameter of the limiting through hole 132 and the diameter of the rod protrusion hole 133. The diameter of the rod is 33; the length of the slit head 11 is greater than the depth of the slot 41, the axial length of the limiting through hole 132 is greater than the depth of the slot 41, and the length of the rod 21 is greater than the sum of the length of the slit head 11 and the depth of the slot 41; the rod 21 is used to pass through the rod through hole 133 and connect to the internal thread hole 42, and the shape of the head 22 matches the limiting through hole 132 so as to be constrained to rotate circumferentially within the slot of the limiting through hole 132; the connecting part 31 of the operating rod 3 is threadedly connected to the threaded connecting hole 131; when the rod 21 of the fixing member 2 is connected to the internal thread hole 42, and the end of the slit head 11 abuts against the slot 41, the distance between the head 22 and the bottom surface of the limiting through hole 132 is greater than the depth of the slot 41; When the head 22 of the fastener 2 abuts against the bottom surface of the limiting through hole 132, the slot 11 of the connector 1 completely disengages from the slot 41 of the balance screw plug 4.

[0021] By using a connector, a fastener, and an operating lever, an integrated operation is achieved that enables pre-installation of the balance plug to prevent it from falling off, efficiently transmits torque, and allows for convenient and safe disassembly. The fastener, passing through the connector's through-hole and connecting to the plug, solves the problem of plugs easily falling off and being difficult to align during long-distance transport. By defining the key length and distance relationships between the connector's slotted head, the fastener's lever, and its head, it is ensured that after installation, the connector can be separated from the plug first by simply lifting and rotating the operating lever in one direction, and then the fastener can be safely unscrewed. The entire process requires only clockwise rotation, completely avoiding the risk of accidentally loosening the already installed plug. This significantly improves the efficiency, reliability, and operational safety of on-site dynamic balancing adjustment under non-cylinder conditions in gas turbines.

[0022] When in use, the fastener 2 can be inserted into the limiting through hole 132 inside the connector 1, and the bottom surface of the head 22 of the fastener 2 should abut against the bottom surface of the limiting through hole 132; the rod 21 passes through the rod through hole 133 and connects to the internal thread hole 42, so that the balance screw plug 4 and the fastener 2 are screwed together. After screwing together to a certain depth, the balance screw plug 4 can be finely adjusted so that the slot 11 of the connector 1 can be fitted into the slot 41 of the balance screw plug 4. Push the balance screw 4 and the fixing member 2 along the axial direction so that the top surface of the slot 11 of the connector 1 abuts against the bottom surface of the slot 41 of the balance screw 4; then make the connecting end 12 of the connector 1 threadedly connected to the connecting part 31 of the operating rod 3.

[0023] Assembly status as follows Figure 2 As shown. The operator rotates the operating lever 3 clockwise, and the connector 1 rotates accordingly, allowing the balance plug 4 to be screwed into the threaded hole on the rotor. After the balance plug 4 is installed in place, the operator pulls the operating lever 3 outward. When the head 22 of the fixing part 2 abuts against the bottom surface of the limiting through hole 132 of the connector 1, the slot 11 of the connector 1 has also separated from the slot 41 of the balance plug 4. Continue to rotate the operating lever 3 clockwise to unscrew the fixing part 2 out of the balance plug 4. Then, remove the device to complete the installation of the balance plug 4.

[0024] The external thread of the balance screw plug 4, the internal thread of the connector 1, and the external thread of the operating rod 3 are all commonly used external threads. During use, both the external thread of the rod 21 and the thread of the internal threaded hole 42 are left-hand threads. After the operator rotates the operating rod 3 clockwise to install the balance screw plug 4, they pull up the operating rod 3 and then continue rotating it clockwise to remove the fixing part 2. This avoids unscrewing the balance screw plug 4 by rotating the operating rod 3 counterclockwise when removing the fixing part 2.

[0025] When the operator installs the balance plug 4 into place, he needs to pull the operating rod 3 to disengage the slotted head 11 from the balance plug 4. Therefore, during assembly, it is necessary to ensure that the distance between the head 22 of the fixing part 2 and the bottom surface of the limiting through hole 132 is greater than the depth of the slotted groove 41 of the balance plug 4.

[0026] The outer side of the balance plug 4 has a right-hand external thread. The internal thread of the connecting end 12 of the connector 1 is also a right-hand thread. This technical measure ensures that the entire force transmission path from the operating rod 3 to the balance plug 4 has a uniform right-hand direction, so that the clockwise rotation operation required to install the balance plug 4 can simultaneously tighten the connection between the components, avoiding loosening of the connection or confusion of the operation logic due to different rotation directions, thereby simplifying the operation and enhancing the directness and reliability of force transmission.

[0027] The opening shape of the limiting through hole 132 is square, and correspondingly, the head 22 is square and mates with the limiting through hole 132. (See also...) Figure 4 and Figure 6 The opening of the limiting through hole 132 in the connector 1 can be designed as square. Correspondingly, the head 22 of the fixing part 2 is also designed as square. When the operator uses the device to rotate and remove the fixing part 2, the limiting through hole 132 on the connector 1 needs to limit and constrain the fixing part, so that the fixing part 2 can be unscrewed from the balance screw 4. In actual use, the square groove is easy to process and has a good limiting effect.

[0028] The operating lever 3 is made of steel tubing. This technique reduces the weight of the device and makes it easier to operate.

[0029] An operating handle 32 is provided at the end of the operating lever 3 away from the connecting part 31. There are two operating handles 32, which are symmetrically arranged on the operating lever 3. This technical measure provides the operator with a force-saving lever, allowing the operator to apply force with both hands or use T-shaped torque, thereby enabling the stable and efficient application and transmission of the rotational torque required for installation under space-constrained conditions, significantly reducing the difficulty of operation and labor intensity.

[0030] The operating lever 3 is composed of multiple detachably connected lever sections. This design allows the length of the operating lever 3 to be flexibly adjusted and combined according to the installation depth and space constraints on site, significantly enhancing the adaptability of the device to different working conditions and the convenience of on-site operation.

[0031] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A balancing screw installation device, characterized in that, It includes a connector (1), a fixing part (2) and an operating rod (3); one end of the balance screw plug (4) is provided with a slot (41), and the center of the bottom of the slot (41) is provided with an internal thread hole (42). The fastener (2) includes a rod (21) and a head (22), wherein the rod (21) is provided with external threads; One end of the connector (1) is provided with a protruding head (11) for engaging with the slot (41), and the other end is a connecting end (12) for connecting with the operating lever (3). The connector (1) has a through hole (13) that passes through the head (11) and the connecting end (12) along the axis inside. The through hole (13) includes a threaded connecting hole (131), a non-circular limiting through hole (132), and a rod through hole (133) connected in sequence. The diameter of the threaded hole (131) is greater than the diameter of the limiting through hole (132) and the diameter of the rod through hole (133). The length of the slit head (11) is greater than the depth of the slot (41), the axial length of the limiting through hole (132) is greater than the depth of the slot (41), and the length of the rod (21) is greater than the sum of the length of the slit head (11) and the depth of the slot (41). The rod (21) is used to pass through the rod through hole (133) and connect to the internal thread hole (42). The shape of the head (22) matches the limiting through hole (132) so as to be constrained to rotate circumferentially within the groove of the limiting through hole (132). The connecting part (31) of the operating lever (3) is threadedly connected to the threaded connecting hole (131); When the rod portion (21) of the fixing member (2) is connected to the internal threaded hole (42), and the end of the slit head (11) abuts against the slot (41), the distance between the head (22) and the bottom surface of the limiting through hole (132) is greater than the depth of the slot (41); When the head (22) of the fastener (2) abuts against the bottom surface of the limiting through hole (132), the pin (11) of the connector (1) completely disengages from the slot (41) of the balance screw plug (4).

2. The balancing screw installation device according to claim 1, characterized in that, The external thread of the rod (21) and the thread of the internal threaded hole (42) are both left-hand threads.

3. The balancing screw installation device according to claim 1, characterized in that, The outer side of the balance plug (4) is a right-hand external thread; the inner thread of the connecting end (12) of the connector (1) is a right-hand thread.

4. The balancing screw installation device according to claim 1, characterized in that, The opening shape of the limiting through hole (132) is square, and correspondingly, the head (22) is square and fits with the limiting through hole (132).

5. The balancing screw installation device according to claim 1, characterized in that, The operating lever (3) has an operating handle (32) at the end away from the connecting part (31).

6. The balancing screw installation device according to claim 5, characterized in that, The number of operating handles (32) is two, and they are symmetrically arranged on the operating lever (3).

7. The balancing screw installation device according to claim 1, characterized in that, The operating lever (3) is composed of multiple segments of lever body that are detachably connected.

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