Positioning clamp for water valve welding

Abstract

The utility model relates to the technical field of valve machining, in particular to a positioning clamp for water valve welding, which comprises a bearing, a small hydraulic cylinder is arranged at the upper end of the bearing, a fixing plate is arranged at the telescopic end of the small hydraulic cylinder, and the fixing plate is connected with two arc-shaped clamping plates through hinges. A movable assembly is arranged on the arc-shaped clamping plate, a fixed shell is arranged on the small hydraulic cylinder, and the arc-shaped clamping plate is connected with the fixed shell through the movable assembly. The small hydraulic cylinder, the fixed plate, the arc-shaped clamping plate and the movable assembly are matched with one another, so that the small hydraulic cylinder drives the arc-shaped clamping plate to open at different angles, the opening angle of the arc-shaped clamping plate is adjusted according to the actual size of the valve body, and therefore when a large-size cylindrical valve body is met, the large-size cylindrical valve body can be conveniently adjusted. And the arc-shaped clamping plates can be opened to firmly clamp the workpiece between the arc-shaped clamping plates, the stability after clamping is higher, and the risk that the workpiece falls off during rotation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve machining technical field especially relates to a kind of positioning fixture for water valve welding. BACKGROUND

[0002] Valve is used to open and close pipeline, control flow direction, adjust and control the parameter of pipeline accessory of conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve etc., and valve is the control component in fluid conveying system, with the functions of cut-off, regulation, flow guide, anti-backflow, pressure stabilization, shunt or overflow pressure relief.

[0003] The existing positioning fixture, such as the positioning fixture for water valve welding disclosed in the publication No. CN209424993U, uses an electric telescopic rod to push the clamping plate to clamp the valve body, which can be freely rotated and adjusted in position, and has high flexibility. However, when the clamping plate encounters a large cylindrical valve body, the outer surface of the valve body cannot be clamped in the middle by the clamping plate, and only the two sides are squeezed and clamped, which has poor stability and may fall off during rotation, which may increase the probability of damage to the valve body. SUMMARY

[0004] The utility model aims at solving the problem that the existing clamping plate cannot clamp the outer surface of the valve body in the middle when it encounters a large cylindrical valve body, and only the two sides are squeezed and clamped, which has poor stability and may fall off during rotation, which may increase the probability of damage to the valve body, and proposes a positioning fixture for water valve welding.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A positioning fixture for water valve welding, comprising a bearing, a small hydraulic cylinder is arranged at the upper end of the bearing, a fixed plate is arranged at the telescopic end of the small hydraulic cylinder, two arc-shaped clamping plates are connected to the fixed plate through a hinge, a movable assembly is arranged on the arc-shaped clamping plate, a fixed shell is arranged on the small hydraulic cylinder, and the arc-shaped clamping plate is connected to the fixed shell through the movable assembly.

[0007] Preferably, the two arc-shaped clamping plates are arranged at the upper and lower ends of the fixed plate respectively, and the arc-shaped surfaces of the arc-shaped clamping plates are arranged oppositely.

[0008] Preferably, the movable assembly comprises a connecting frame, a connecting rod, a limiting block, a connecting block, a U-shaped connecting plate, a straight slot and a connecting shaft, and the connecting block is arranged on the top surface of the arc-shaped clamping plate.

[0009] Preferably, the U-shaped connecting plate is arranged at one end of the connecting frame close to the arc-shaped clamping plate, and the U-shaped connecting plate is rotationally connected to the connecting block through a rotating shaft.

[0010] Preferably, the straight slot is arranged on both sides of the outer wall of the fixed shell, the limiting block is arranged in the straight slot, and the connecting shaft is arranged on the side of the limiting block facing the outside.

[0011] Preferably, the side of the fixed plate away from the small hydraulic cylinder is provided with a rubber non-slip pad, and the rubber non-slip pad is provided with non-slip lines.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] In use, the small hydraulic cylinder, the fixed plate, the arc-shaped clamping plate and the movable assembly are matched with each other, the small hydraulic cylinder drives the arc-shaped clamping plate to open different angles, the arc-shaped clamping plate adjusts the opening angle according to the actual size of the valve body, so that when a large cylindrical valve body is encountered, the arc-shaped clamping plate can open to clamp the valve body firmly in the middle, and the stability after clamping is stronger, and the risk of falling during rotation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 A perspective structural schematic view of the positioning clamp for water valve welding is provided for the utility model;

[0015] Fig. 2 A top perspective structural schematic view of the positioning clamp for water valve welding is provided for the utility model;

[0016] Fig. 3 A connecting shaft and connecting rod perspective structural schematic view of the positioning clamp for water valve welding is provided for the utility model.

[0017] In the drawing: 1, bearing; 2, small hydraulic cylinder; 3, fixed plate; 4, arc-shaped clamping plate; 5, connecting frame; 6, connecting rod; 7, limiting block; 8, fixed shell; 9, connecting block; 10, U-shaped connecting plate; 11, rubber non-slip pad; 12, straight slot; 13, connecting shaft; 14, movable assembly. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] REFERENCE Figs. 1-3The utility model provides a positioning fixture for water valve welding, including bearing 1, the upper end of bearing 1 is provided with small -size hydraulic cylinder 2, the telescopic end of small -size hydraulic cylinder 2 is provided with fixed plate 3, two arc clamping plates 4 are connected through the hinge of fixed plate 3, arc clamping plate 4 is provided with movable assembly 14, movable assembly 14 includes connecting frame 5, connecting rod 6, limit block 7, connecting block 9, U type connecting plate 10, straight slot 12 and connecting shaft 13, and connecting block 9 is arranged on the top surface of arc clamping plate 4.

[0020] Small -size hydraulic cylinder 2 is provided with fixed shell 8, and arc clamping plate 4 is connected with fixed shell 8 through movable assembly 14.

[0021] Small -size hydraulic cylinder 2 is the prior art means of the technical field to which the utility model belongs, and arc clamping plate 4 is driven to expand or contract to both sides by movable assembly 14 by driving small -size hydraulic cylinder 2, so no more.

[0022] Two arc clamping plates 4 are arranged at the upper and lower ends of fixed plate 3 respectively, and the arc surfaces of arc clamping plate 4 are oppositely arranged.

[0023] Wherein, the arc surface of arc clamping plate 4 is provided with a non-slip pad, so that the friction between arc clamping plate 4 and the surface of the valve body is stronger.

[0024] U type connecting plate 10 is arranged at one end of connecting frame 5 close to arc clamping plate 4, and U type connecting plate 10 is rotatably connected with connecting block 9 through a rotating shaft.

[0025] Straight slot 12 is arranged on the outer wall of fixed shell 8, limit block 7 is arranged in straight slot 12, connecting shaft 13 is arranged on the side of limit block 7 facing the outside, and connecting rod 6 is respectively installed on connecting frame 5 and connecting shaft 13.

[0026] Wherein, the cross section of limit block 7 is in the shape of an I-beam, so that limit block 7 can move in straight slot 12 and not easily separate.

[0027] Rubber non-slip pad 11 is arranged on the side of fixed plate 3 away from small -size hydraulic cylinder 2, and rubber non-slip pad 11 is provided with anti -skid lines.

[0028] It should be noted that the specific model and specification of small -size hydraulic cylinder 2 need to be selected and determined according to the actual specification of the device, and the specific selection calculation method adopts the existing technology in the art, so no more is described, and the power supply can be provided by external equipment and controlled to open and close.

[0029] Working principle: first, need to clamp the valve body with large diameter, small hydraulic cylinder 2 is installed in the upper end of bearing 1, through the movement of hydraulic drive telescopic end, drive fixed plate 3 up and down. Fixed plate 3 as the core support component, its movement provides power for the subsequent clamping action; when fixed plate 3 moves under the drive of small hydraulic cylinder 2, arc clamp plate 4 realizes opening and closing movement through the linkage action of movable assembly 14, so as to clamp or release the water valve;

[0030] When small hydraulic cylinder 2 drives fixed plate 3 to move, connecting rod 6 drives connecting frame 5 to move, and then arc clamp plate 4 is driven to open and close through U-shaped connecting plate 10, the sliding range of limiting block 7 in straight slot 12 limits the movement amplitude of arc clamp plate 4, ensures the accuracy and stability of clamping action. At the same time, fixed shell 8 provides support and guide for movable assembly 14, further enhances the overall stability of the clamp.

[0031] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A positioning fixture for water valve welding, comprising a bearing (1), characterized in that, The upper end of the bearing (1) is provided with a small hydraulic cylinder (2), the telescopic end of the small hydraulic cylinder (2) is provided with a fixed plate (3), the fixed plate (3) is connected with two arc-shaped clamping plates (4) through a hinge, the arc-shaped clamping plate (4) is provided with a movable assembly (14), the small hydraulic cylinder (2) is provided with a fixed shell (8), and the arc-shaped clamping plate (4) is connected with the fixed shell (8) through the movable assembly (14).

2. A positioning fixture for water valve welding according to claim 1, characterized in that, The two arc-shaped clamping plates (4) are arranged at the upper and lower ends of the fixed plate (3) respectively, and the arc-shaped surfaces of the arc-shaped clamping plates (4) are oppositely arranged.

3. A positioning fixture for water valve welding as defined in claim 1, wherein, The movable assembly (14) comprises a connecting frame (5), a connecting rod (6), a limiting block (7), a connecting block (9), a U-shaped connecting plate (10), a straight slot (12) and a connecting shaft (13), and the connecting block (9) is arranged on the top surface of the arc-shaped clamping plate (4).

4. A positioning fixture for water valve welding according to claim 3, characterized in that, The U-shaped connecting plate (10) is arranged at one end of the connecting frame (5) close to the arc-shaped clamping plate (4), and the U-shaped connecting plate (10) is rotationally connected with the connecting block (9) through a rotating shaft.

5. A positioning fixture for water valve welding according to claim 4, characterized in that, The straight slot (12) is arranged on the outer wall of the fixed shell (8), the limiting block (7) is arranged in the straight slot (12), the connecting shaft (13) is arranged on one side of the limiting block (7) facing the outside, and the connecting rod (6) is respectively arranged on the connecting frame (5) and the connecting shaft (13).

6. A positioning fixture for water valve welding as defined in claim 1, wherein, The side, away from the small hydraulic cylinder (2), of the fixed plate (3) is provided with a rubber antiskid pad (11), and the rubber antiskid pad (11) is provided with antiskid lines.

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