CN219074425U

CN219074425U - Center line butterfly valve body positioning fixture

Info

Publication number: CN219074425U
Application number: CN202223576772.9U
Authority: CN
Inventors: 张海若; 张同虎
Original assignee: Aqua Casting Inc
Current assignee: Aqua Casting Inc
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-05-26
Anticipated expiration: 2032-12-31

Abstract

The utility model discloses a positioning clamp for a central line butterfly valve body, which comprises a frame and a fixed support connected to the frame, wherein a positioning mandrel which extends upwards and can penetrate into a channel inner hole of the central line butterfly valve body is arranged on the fixed support, the positioning mandrel is provided with a conical outer surface, an elastic mandrel collet is sleeved outside the positioning mandrel, the inner surface of the elastic mandrel collet is matched with the outer surface of the positioning mandrel in shape and can realize diameter scaling, a pressing nut is screwed on the top of the positioning mandrel, a pressing plate positioned below the pressing nut is sleeved on the upper part of the positioning mandrel, and the bottom of the pressing plate is pressed on the top of the elastic mandrel collet. The utility model can rapidly realize the clamping and positioning of the central line disc valve body and has the advantages of high labor efficiency, capability of ensuring the processing precision and improving the product quality.

Description

Center line butterfly valve body positioning fixture

Technical Field

The utility model relates to the technical field of machining of center line butterfly valve bodies, in particular to a center line butterfly valve body positioning clamp.

Background

The butterfly valve mainly comprises a center line butterfly valve and an eccentric butterfly valve, wherein a main processing surface of a center line butterfly valve body is provided with a middle channel sealing surface and two valve rod shaft holes, the middle line butterfly valve body channel sealing surface is processed by turning, and the valve rod shaft holes are processed on a horizontal processing center. When the valve rod shaft hole is machined, a channel sealing surface is used as a positioning reference. Currently, the outer circle of a positioning mandrel is matched with the inner hole of a sealing surface of a butterfly valve for positioning (H9/H7) in factories. The shaft hole of the valve rod of the butterfly valve and the sealing surface of the channel have the requirements of 0.06mm symmetry and 0.06mm coaxiality. In order to ensure the requirement of form and position tolerance, the fit clearance (diameter) between the outer circle of the positioning mandrel and the inner hole of the valve body channel is controlled within 0.05mm, and the fit clearance is smaller. The valve body passage hole is made by turning, the surface roughness of the passage inner hole is Ra3.2-6.3, and the friction force between the valve body passage inner hole and the centering shaft is larger when the valve body is clamped; the fit clearance is small, and the valve is carefully aligned when being installed; the butterfly valve body is installed due to the factors, labor is wasted, copper bars are often needed to be knocked, a large amount of labor hour and physical strength are wasted during multi-station clamping, and labor efficiency is low.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the positioning clamp for the central line butterfly valve body, which can rapidly realize the positioning of the central line butterfly valve body and improve the labor efficiency.

In order to solve the technical problems, the midline butterfly valve body positioning clamp provided by the utility model comprises a frame and a fixed support connected to the frame, and is structurally characterized in that: the positioning mandrel is arranged on the fixed support, extends upwards and can penetrate into the inner hole of the channel of the middle line disc valve body, the positioning mandrel is provided with a conical outer surface, an elastic mandrel collet is sleeved outside the positioning mandrel, the inner surface of the elastic mandrel collet is adaptive to the shape of the outer surface of the positioning mandrel, the diameter of the positioning mandrel can be scaled, the top of the positioning mandrel is in threaded connection with a pressing nut, the upper part of the positioning mandrel is also sleeved with a pressing plate positioned below the pressing nut, and the bottom of the pressing plate is pressed against the top of the elastic mandrel collet.

The outer surface of the elastic mandrel collet is cylindrical, the inner surface of the elastic mandrel collet is conical, the elastic mandrel collet is provided with an open slot which is distributed along the axis line of the elastic mandrel collet and extends along the axis line of the elastic mandrel collet, the open slot extends from the upper part of the elastic mandrel collet to the bottom of the elastic mandrel collet or/and the open slot extends from the lower part of the elastic mandrel collet to the top of the elastic mandrel collet.

The inward extending end of the open slot is provided with a circular hole.

The fixed support is also provided with a vertical support, and the vertical support is connected with a compression bolt which can extend into a lateral through hole of the central line disc valve body in a threaded manner so as to realize the compression of the central line disc valve body.

The diameter of the pressure plate is smaller than that of the inner hole of the channel of the middle line disc valve body.

After adopting above-mentioned structure, owing to adopted the structure of location dabber and elastic dabber collet chuck, when location dabber and elastic dabber collet chuck insert the passageway hole of central line dish valve body, along with pressing the screw of nut, the pressure backup pad promotes the elastic dabber collet chuck and moves down, the diameter of elastic dabber collet chuck grow gradually under the extrusion effect of conical surface to automatic tensioning is to above-mentioned passageway hole, has realized the center location of automatic centering line butterfly valve body, thereby has guaranteed the machining precision in valve rod shaft hole, and this kind of mode of pressing from both sides tight location, and is very convenient, has improved labor efficiency greatly.

In conclusion, the clamping and positioning device can rapidly realize clamping and positioning of the central disc valve body, and has the advantages of high labor efficiency, capability of guaranteeing the machining precision and improving the product quality.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of the positioning mandrel of the embodiment of FIG. 1;

FIG. 3 is a schematic view of the spring spindle collet of the embodiment of FIG. 1;

FIG. 4 is a schematic view of the disc valve body connected to the embodiment of FIG. 1;

FIG. 5 is a schematic illustration of the requirements for machining a disc valve body.

Detailed Description

Referring to FIG. 5, the main processing surface of the center line butterfly valve body is provided with a middle channel sealing surface and two valve rod shaft holes, the outer circle of a positioning mandrel is usually matched and positioned with the inner hole of the butterfly valve sealing surface (H9/H7) in factories, as shown in FIG. 5, the valve rod shaft holes of the butterfly valve and the channel sealing surface have the requirements of 0.06mm symmetry and 0.06mm coaxiality, and the tolerance marks in FIG. 5 can obviously see the data. In order to ensure the requirement of form and position tolerance, the fit clearance (diameter) between the outer circle of the positioning mandrel and the inner hole of the valve body channel is controlled within 0.05mm, the fit clearance is smaller, the valve body channel hole is machined, and the surface roughness of the inner hole of the channel is Ra3.2-6.3, so that the positioning accuracy is difficult to ensure when the valve body channel hole is positioned.

Referring to the drawings, the present utility model provides a positioning fixture for a central butterfly valve body, for convenience of description, the vertical direction refers to the vertical direction of the paper surface in fig. 1, and the connection and installation described below can be understood as direct connection or indirect connection, and the indirect connection means that connection or installation between two components can be performed through an intermediate component.

Referring to fig. 1 to 4, an embodiment of a positioning fixture for a central line butterfly valve body provided by the utility model comprises a stand 1 and a fixed support 2 connected to the stand 1, wherein a workbench is arranged on the stand 1, the fixed support 2 can be connected by adopting a structure of a T-shaped groove and a locking bolt, a positioning mandrel 3 which extends upwards and can penetrate into a passage inner hole of the central line butterfly valve body is arranged on the fixed support 2, the positioning mandrel 3 is provided with a conical outer surface, an elastic mandrel collet 4 is sleeved outside the positioning mandrel 3, the elastic mandrel collet 4 is supported by spring steel, the conical surface angle of the conical shape is 18 degrees and slightly larger than a self-locking angle, the automatic elastic return can be realized, the inner surface of the elastic mandrel collet 4 is matched with the outer surface shape of the positioning mandrel and can realize diameter scaling, the top of the positioning mandrel 3 is screwed with a pressing nut 5, the upper part of the positioning mandrel 3 is also sleeved with a pressing plate 6 positioned below the pressing nut 5, and the bottom of the pressing plate 6 is pressed on the top of the elastic mandrel collet 4.

Referring to fig. 1 to 4, the outer surface of the elastic mandrel collet 4 is cylindrical, the inner surface is conical, the elastic mandrel collet 4 is provided with an open slot 41 which is distributed along the axis line of the elastic mandrel collet 4 and extends along the axis line of the elastic mandrel collet, the open slot 41 extends from the upper part of the elastic mandrel collet 4 to the bottom of the elastic mandrel collet or/and the open slot 41 extends from the lower part of the elastic mandrel collet 4 to the top of the elastic mandrel collet, which means that the open slot 41 which is downward can be independently arranged, and the open slot which extends upwards can also be arranged, of course, in the embodiment, the open slots of the two structures are arranged, and the open slot is enlarged or reduced through the conical matching, so that the diameter of the elastic mandrel collet 4 is enlarged or reduced. The inward extending end of the open slot 41 has a circular hole. The diameter of the pressure plate 6 is smaller than the diameter of the inner hole of the passage of the central disc valve body. When the utility model is used, the central line disc valve body can be sleeved on the positioning mandrel and the elastic mandrel collet 4 at any time, the disassembly and the assembly are very convenient, and the labor efficiency is greatly improved.

Referring to fig. 1 to 4, the fixed support 2 is further provided with a vertical bracket 7, and a compression bolt 8 which can extend into a side through hole of the central line disc valve body to press the central line disc valve body is screwed on the vertical bracket 7.

The present utility model is not limited to the above-described embodiments, and it is within the scope of the present utility model to provide equivalent variations on the specific structures of the present utility model and to replace the components in the present utility model, as will be apparent to those skilled in the art.

Claims

1. The utility model provides a central line butterfly valve body positioning fixture, includes frame (1) and connects fixed bolster (2) on frame (1), characterized by: the utility model discloses a fixed support, including fixed support (2), fixed support (3) are equipped with upwards stretch out and can penetrate in the passageway hole of central line dish valve body, and fixed support (3) have conical surface, fixed support (3) overcoat has elastic mandrel collet chuck (4), and the internal surface of elastic mandrel collet chuck (4) suits and can realize the shrink of diameter with the surface shape of fixed support, the top spiro union of fixed support (3) has to press against nut (5), and fixed support (3) upper portion still suit is equipped with pressure plate (6) and the bottom of pressure plate (6) that are located to press against nut (5) below and presses against the top of elastic mandrel collet chuck (4).

2. The midline butterfly valve body positioning fixture of claim 1, wherein: the outer surface of the elastic mandrel collet (4) is cylindrical, the inner surface of the elastic mandrel collet is conical, the elastic mandrel collet (4) is provided with an open slot (41) which is distributed along the axis line of the elastic mandrel collet and extends along the axis line of the elastic mandrel collet, the open slot (41) extends from the upper part of the elastic mandrel collet (4) to the bottom of the elastic mandrel collet or/and the open slot (41) extends from the lower part of the elastic mandrel collet (4) to the top of the elastic mandrel collet.

3. The center line butterfly valve body positioning fixture of claim 2, wherein: the inward extending end of the open slot (41) is provided with a circular hole.

4. A midline butterfly valve body positioning jig according to any one of claims 1 to 3, characterized by: the fixed support (2) is also provided with a vertical support (7), and the vertical support (7) is connected with a compression bolt (8) which can extend into a lateral through hole of the central line disc valve body in a threaded manner so as to press the central line disc valve body.

5. The midline butterfly valve body positioning fixture of claim 4, wherein: the diameter of the pressure plate (6) is smaller than that of the inner hole of the channel of the middle line disc valve body.