Welding tool for handle of vortex shedding flowmeter

Abstract

The utility model discloses a vortex shedding flowmeter handle welding tool which is characterized by comprising a base plate, a vertical rod and a pressing sleeve. The chassis and the vertical rod are concentrically arranged; a rectangular bump is arranged in the center of the upper surface of the chassis; a lower positioning ring with an increased outer diameter is arranged at the lower part of the vertical rod, and an upper positioning ring with an increased outer diameter is arranged at the upper part of the middle part of the vertical rod; an external thread section is arranged at the upper part of the vertical rod; the lower end of the lower positioning ring is fixedly connected with the upper surface of the rectangular convex block; and an internal thread hole matched with the external thread section is formed in the center of the pressing sleeve. The tool can be used for positioning and clamping the vortex shedding flowmeter handle during welding, and has the advantages of simplicity in operation and high assembly and disassembly efficiency; and collision with a welding gun is avoided during circumferential rotating welding, so that automatic welding work is facilitated to be matched with a welding robot, and the welding quality can be ensured.

Description

Technical Field

[0001] This utility model relates to a welding fixture for a vortex flowmeter handle. Background Technology

[0002] A vortex flow meter is a volumetric flow meter that measures the volumetric flow rate, standard volumetric flow rate, or mass flow rate of gases, steam, or liquids based on the Karman vortex street principle. It is a highly advanced and ideal measuring instrument, widely used in the flow measurement of fluids in industrial pipelines. A vortex flow meter includes a body, an anti-interference sensor, a display, a vortex generator, disassembly components, connection components, and a handle. The handle (or support tube) is fixedly connected at its lower end to the housing and at its upper end to the display housing. The handle contains internal wiring; the lower end of the wiring connects to the vortex generator circuitry within the housing, and the upper end connects to the internal circuitry of the display. The handle primarily serves to support and fix the flow meter, ensuring stable operation under various conditions. It prevents displacement or deformation due to fluid impact, vibration, or other external factors, thus guaranteeing measurement accuracy and long-term stability.

[0003] As a handle for a vortex flow meter, see [link / reference]. Figure 1-3 The handle of this vortex flowmeter is constructed by welding together a lower connector N-1, a middle tube body N-2, and an upper connector N-3 from bottom to top. The lower connector N-1 is a rectangular block with a groove N-11 on its lower surface and a lower through hole N-12 inside. The middle tube body N-2 has a central through hole N-21, and the upper connector N-3 has an upper through hole N-31. The lower outer wall of the upper connector N-3 has a hexagonal head N-32, and the upper outer wall has an external thread N-33. During the welding and production of this vortex flowmeter handle, a positioning and clamping mechanism for its components needs to be designed to ensure concentric positioning and fixed constraints during welding, facilitating assembly and disassembly.

[0004] Furthermore, current research indicates that existing welding fixtures are not suitable for positioning and clamping the aforementioned vortex flowmeter handle during welding. Utility Model Content

[0005] This utility model provides a welding fixture for a vortex flow meter handle to solve the technical problem of how to position and clamp the vortex flow meter handle during welding.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A welding fixture for a vortex flowmeter handle, characterized in that it includes a base, a vertical rod, and a pressure sleeve; the base and the vertical rod are concentrically arranged; a rectangular protrusion is provided at the center of the upper surface of the base; a lower positioning ring with an increased outer diameter is provided at the lower part of the vertical rod, and an upper positioning ring with an increased outer diameter is provided at the upper part of the middle of the vertical rod; an external thread section is provided at the upper part of the vertical rod; the lower end of the lower positioning ring is fixedly connected to the upper surface of the rectangular protrusion; and an internal thread hole for engaging with the external thread section is provided at the center of the pressure sleeve.

[0008] Furthermore, the chassis has multiple connection holes circumferentially located near the edge.

[0009] Furthermore, the connection holes have 4-8 holes.

[0010] Furthermore, the chassis and the uprights are an integral structure.

[0011] Furthermore, the chassis is coaxially fixed to the turntable, and the lower end of the turntable is connected to the geared motor.

[0012] Furthermore, a positioning post is provided at the center of the lower surface of the chassis; a center hole that mates with the positioning post is provided at the center of the turntable; the chassis and the turntable are detachably fixed together by a bolt and nut assembly.

[0013] The beneficial effects of this utility model are:

[0014] First, this utility model, through the reasonable combination of chassis, upright and pressure sleeve, can realize the positioning and clamping of the lower connector, middle tube and upper connector of the vortex flowmeter handle during welding. It has the advantages of simple structure, low cost, convenient loading and unloading, and improved product welding efficiency.

[0015] Secondly, since there is no interference in the circumferential periphery of the two welding points of this utility model, whether manual welding or automatic welding by a welding robot is used, there will be no collision with the welding torch during circumferential rotation welding, which is especially beneficial for cooperating with welding robots to achieve automated welding work.

[0016] Third, this utility model achieves anti-rotation and directional positioning by having the lower surface of the lower connector abut against the upper surface of the chassis and the groove of the lower connector engaging with the rectangular protrusion; and by having the lower positioning ring engage with the upper end of the lower through hole of the lower connector and the lower end of the central through hole of the central tube body to achieve concentric positioning of the weld joint; and by having the upper positioning ring engage with the lower end of the upper through hole of the upper connector and the upper end of the central through hole of the central tube body to achieve concentric positioning of the weld joint. Therefore, it can keep the lower connector, the central tube body and the upper connector concentric, ensuring the welding quality and precision requirements of the product. Attached Figure Description

[0017] Figure 1 This is an exploded view of the lower connector, middle tube, and upper connector of the vortex flow meter handle before welding.

[0018] Figure 2-3 This is a schematic diagram of the structure of the lower connector, middle tube, and upper connector of the vortex flowmeter handle when they are welded together as one piece.

[0019] Figure 4 This is an exploded view of the vortex flowmeter handle welding fixture in Embodiment 1 of this utility model when it is not positioned and clamped.

[0020] Figure 5-6 This is a diagram showing the working state of a vortex flowmeter handle welding fixture during the positioning and clamping welding process in Embodiment 1 of this utility model.

[0021] Figure 7 yes Figure 6 A magnified view of point P in the middle.

[0022] Figure 8 yes Figure 6 A magnified view of point R in the middle.

[0023] Figure 9 This is a diagram showing the working state of a vortex flowmeter handle welding fixture during the positioning and clamping welding process in Embodiment 2 of this utility model.

[0024] Figure 10 This is a schematic diagram of the structure of a vortex flowmeter handle welding fixture in Embodiment 2 of this utility model when the chassis and turntable are disassembled and separated. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Example 1: See Figure 4-8 A welding fixture for a vortex flowmeter handle, comprising a base 1, a vertical rod 2, and a pressure sleeve 3.

[0027] See Figure 4 The chassis 1 and the upright 2 are concentrically arranged; a rectangular protrusion 1-1 is provided at the center of the upper surface of the chassis 1.

[0028] See Figure 4 The lower part of the upright 2 is provided with a lower positioning ring 2-1 with an increased outer diameter, and the upper part of the middle of the upright 2 is provided with an upper positioning ring 2-2 with an increased outer diameter; the upper part of the upright 2 is provided with an external thread section 2-3; the lower end of the lower positioning ring 2-1 is fixedly connected to the upper surface of the rectangular protrusion 1-1; the center of the pressure sleeve 3 is provided with an internal thread hole 3-1 for cooperating with the external thread section 2-3.

[0029] See Figure 4 Furthermore, the chassis 1 and the upright 2 are an integral structure.

[0030] See Figure 4Furthermore, the chassis 1 has a plurality of connecting holes 1-2 circumferentially provided near the edge. The chassis 1 can be easily and detachably fixed to the worktable or turntable through the plurality of connecting holes 1-2.

[0031] See Figure 4 Furthermore, the number of connecting holes is 4-8. In this embodiment, there are 6 connecting holes that are evenly distributed.

[0032] In this embodiment, the fixture is first fixed to the worktable or turntable via the connecting holes 1-2, and then the components of the vortex flowmeter handle are positioned and clamped. The specific method is as follows:

[0033] First, install the lower connector N-1, the middle tube body N-2, and the upper connector N-3 onto the upright 2 in that order from bottom to top (see...). Figure 5-8 );

[0034] Then, adjust the direction of the lower connector N-1 so that its slot N-11 mates with the rectangular protrusion 1-1 (see...). Figure 5-8 );

[0035] Finally, place the pressure sleeve 3 onto the external thread section 2-3 of the upright 2, and then rotate it continuously until the pressure sleeve 3 can no longer descend, thus achieving a tight clamping position and completing the positioning and clamping (see...). Figure 5-8 ).

[0036] Then, circumferential welding can be performed at the contact point between the upper end of the lower connector N-1 and the lower end of the middle tube body N-2 (i.e., weld 1), and circumferential welding can be performed at the contact point between the upper end of the middle tube body N-2 and the lower end of the upper connector N-3 (i.e., weld 2). Since the lower connector N-1, the middle tube body N-2, and the upper connector N-3 are connected as a whole, the vortex flowmeter handle is obtained (see [reference]). Figure 5-8 );

[0037] After welding is completed, rotate the pressure sleeve 3 in the reverse direction. The pressure sleeve 3 will move upward on the external thread section 2-3 of the upright 2 until it is disengaged and removed. Then, pull the vortex flowmeter handle (the welded workpiece) upward, thus completing the entire welding process. Afterward, the next product to be welded can be clamped.

[0038] In this embodiment, during positioning and clamping, the lower surface of the lower connector N-1 abuts against the upper surface of the chassis 1, and the slot N-11 of the lower connector N-1 engages with the rectangular protrusion 1-1 to achieve anti-rotation and directional positioning. The lower positioning ring 2-1 engages with the upper end of the lower through hole N-12 of the lower connector N-1 and the lower end of the central through hole N-21 of the middle tube body N-2 to achieve concentric positioning of the weld joint. The upper positioning ring 2-2 engages with the lower end of the upper through hole N-31 of the upper connector N-3 and the upper end of the central through hole N-21 of the middle tube body N-2 to achieve concentric positioning of the weld joint. Therefore, the lower connector N-1, the middle tube body N-2, and the upper connector N-3 can be kept concentric, ensuring the welding quality and precision requirements.

[0039] This embodiment, through the reasonable combination of chassis 1, upright 2 and pressure sleeve 3, can achieve positioning and clamping of lower connector N-1, middle tube body N-2 and upper connector N-3. The structure is simple, the cost is low, and the loading and unloading are convenient, which can improve the product welding efficiency. At the same time, since there is no interference on the circumferential periphery of welding point 1 and welding point 2, whether manual welding or automatic welding by welding robot is used, there will be no collision with the welding torch during circumferential rotation welding, which is especially beneficial for cooperating with welding robot to achieve automated welding work.

[0040] Example 2: This example is a further improvement on Example 1:

[0041] See also Figure 9-10 Furthermore, the chassis 1 is coaxially fixed to the turntable 4, and the lower end of the turntable 4 is connected to the reduction motor 5. The reduction motor 5 is used to drive the turntable 4 to rotate at a low speed, thereby driving the workpiece positioned and clamped on the chassis 1 to rotate at a low speed, thus achieving circumferential automatic welding while the welding torch of the welding robot remains stationary.

[0042] See also Figure 9-10 Preferably, the geared motor 5 includes a motor 5-1 and a worm gear transmission assembly 5-2, wherein the motor 5-1 is connected to the turntable 4 through the worm gear transmission assembly 5-2.

[0043] See also Figure 9-10 Furthermore, a positioning post 1-3 is provided at the center of the lower surface of the chassis 1; a center hole 4-1 is provided at the center of the turntable 4 to cooperate with the positioning post 1-3; the chassis 1 and the turntable 4 are detachably fixed by a bolt and nut assembly (6-1, 6-2). Specifically, the turntable 4 is provided with multiple circumferentially distributed T-shaped radial grooves 4-2. During fixing, the head of the bolt 6-1 is inserted into the T-shaped radial groove 4-2 and locked in place, and then the thread of the bolt 6-1 passes upward through the connecting hole 1-2 of the chassis 1 and cooperates with the nut 6-2 to achieve locking.

[0044] Since the chassis 1 and the turntable 4 are detachable and fixed, it is convenient to change the corresponding tooling when welding different models of products.

[0045] Furthermore, the number of T-shaped radial grooves 4-2 and the positions of the connecting holes 1-2 are the same and correspond one-to-one. In this embodiment, six T-shaped radial grooves 4-2 are also used and are evenly distributed.

[0046] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A welding fixture for a vortex flowmeter handle, characterized in that: It includes a chassis (1), a vertical pole (2), and a pressure sleeve (3); the chassis (1) and the vertical pole (2) are arranged concentrically; A rectangular protrusion (1-1) is provided at the center of the upper surface of the chassis (1). The lower part of the upright (2) is provided with a lower positioning ring (2-1) with an increased outer diameter, and the upper part of the middle part of the upright (2) is provided with an upper positioning ring (2-2) with an increased outer diameter; the upper part of the upright (2) is provided with an external thread section (2-3). The lower end of the lower positioning ring (2-1) is fixedly connected to the upper surface of the rectangular protrusion (1-1); The pressure sleeve (3) has an internal thread hole (3-1) at its center for engaging with the external thread section (2-3).

2. The welding fixture for a vortex flowmeter handle as described in claim 1, characterized in that: The chassis (1) has a plurality of connecting holes (1-2) in the circumferential direction near the edge.

3. The welding fixture for a vortex flowmeter handle as described in claim 2, characterized in that: The number of connection holes (1-2) is 4-8.

4. The welding fixture for a vortex flowmeter handle as described in claim 1, characterized in that: The chassis (1) and the uprights (2) are an integral structure.

5. A welding fixture for a vortex flowmeter handle as described in any one of claims 1-3, characterized in that: The chassis (1) is coaxially fixed to the turntable (4), and the lower end of the turntable (4) is connected to the geared motor (5).

6. The welding fixture for a vortex flowmeter handle as described in claim 5, characterized in that: The chassis (1) has a positioning post (1-3) at the center of its lower surface; the turntable (4) has a center hole (4-1) at its center that mates with the positioning post (1-3); the chassis (1) and the turntable (4) are detachably fixed by bolt and nut assembly (6-1, 6-2).

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