A device for measuring the eccentricity of a triple eccentric butterfly valve

Abstract

A device for measuring the eccentricity of a three-eccentric butterfly valve body includes a cross guide block, a base, a connecting rod, and a limit seat. One end of the cross guide block is installed in a guide groove I at the top of the base, and the other end is installed in a guide groove II on one side of the connecting rod. The limit seat is installed on the positioning stop at the top of the base. The other end of the connecting rod is connected to a probe I, which is located on the center line of the guide groove of the connecting rod. Probes II are symmetrically arranged at both ends of the sliding seat, and the distance between probes I and II forms an isosceles triangle. The beneficial effect of the invention is that the device can achieve accurate and rapid measurement of valve bodies of multiple calibers and specifications, with a compact structure, high degree of freedom, flexible and simple operation, and good versatility.

Description

Technical Field

[0001] The invention relates to a measuring device, in particular to a valve body eccentricity measuring device for a triple-eccentric butterfly valve. Background Art

[0002] There is a lack of simple, accurate and reliable methods to detect the actual eccentricity of the three-eccentric butterfly valve after processing. In the past, the size eccentricity of the valve body depended on the careful operation of the processing personnel, and the angle eccentricity depended on the guarantee of the fixture. At present, the equipment that can detect the eccentricity of the valve body of the three-eccentric butterfly valve is the three-coordinate measuring instrument. The coordinate value of the detected point of the valve body is read and displayed by the probe to obtain the eccentricity of the valve body. However, the actual detection process for a valve body is very inconvenient. The three-coordinate measuring instrument is a precision detection equipment that requires a special place to be placed and professionals to operate and maintain it. Because the equipment is fixed and cannot be moved, the valve body cannot be detected nearby. Due to the large number of specifications, heavy weight and special structure of the butterfly valve body, it is very inconvenient to transfer the valve body to be tested to the three-coordinate detection workbench. The three-coordinate measuring instrument takes a long time to detect a valve body, and the detection efficiency is low. It requires a high degree of professionalism for the detection personnel and is not suitable for batch detection of valve bodies. For valve bodies with larger specifications, the size even exceeds the working range of the three-coordinate measuring instrument. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a device for measuring the eccentricity of a valve body of a triple-eccentric butterfly valve.

[0004] The technical solution of the present invention is a device for measuring the eccentricity of a three-eccentric butterfly valve body, comprising a cross guide block, a base, a connecting rod, and a limit seat, wherein one end of the cross guide block is mounted in a guide groove I at the top of the base, and the other end is mounted in a guide groove II on one side of the connecting rod, the limit seat is mounted on a positioning stop at the top of the base, the limit seat is fixed to the base by a fastener, a square groove is provided at the bottom of the base, round holes are provided at both ends of the bottom of the square groove, a spring is installed in the round hole, a telescopic block is installed in the square groove, contacts are symmetrically provided at both ends of the telescopic block, a limit groove is provided on the side of the telescopic block, and the limit piece in the limit groove passes from the side of the base The connecting rod is inserted into the hole, and the other end of the connecting rod is connected with probe I, which is located on the center line of the guide groove of the connecting rod. A guide hole is provided on the connecting rod, and a sliding seat, a screw II and a nut are matched in the guide hole. Probes II are symmetrically provided at both ends of the sliding seat, and the spacing between probes I and probes II forms an isosceles triangle. The contact, probe I and probe II are parallel to each other and are all perpendicular to the connecting rod. A square hole is provided on the limit seat, and a long groove is provided on the inner side of the limit seat. A square nut is installed in the long groove, and a screw passing through the square hole of the limit seat is matched in the threaded hole of the square nut, and the end of the screw is stuck in the straight line groove on the back of the connecting rod.

[0005] Preferably, the top of the contact is semi-spherical.

[0006] Preferably, the connection between the connecting rod and the probe I is replaceable.

[0007] Preferably, the connection between the sliding seat and the probe II is replaceable.

[0008] The beneficial effects of the present invention are that the device can realize accurate and rapid measurement of valve bodies with multiple calibers and specifications, and the device has a compact structure, a high degree of freedom, flexible and simple operation, and good versatility.

[0009] The center line of the shaft hole can be found by using appropriate probes for valve bodies of different calibers in conjunction with the base tensioning probe on the shaft hole. The center line of the valve body can be found by fine-tuning the two contacts of the base to fully contact the inner channel of the valve body. The process of finding the valve body channel and the center of the shaft hole is very convenient. By converting the eccentricity of the valve body to this device, the inspector can use a caliper to quickly and conveniently obtain the actual dimensional eccentricity of the valve body after processing. This series of operation processes does not require special professionals and complicated operation methods, and ordinary workshop inspectors or operators can use the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention;

[0011] Figure 2 yes Figure 1 Middle B view;

[0012] Figure 3 yes Figure 1 Center A view.

[0013] In the figure: 1. base; 2. connecting rod; 3. cross guide block; 4. limit seat; 5. fastener; 6. contact; 7. telescopic block; 8. limit piece; 9. spring; 10. square nut; 11. screw I; 12. probe I; 13. probe II; 14. sliding seat; 15. screw II; 16. nut. DETAILED DESCRIPTION

[0014] As shown in the figure, a device for measuring the eccentricity of a three-eccentric butterfly valve body comprises a cross guide block 3, a base 1, a connecting rod 2 and a limit seat 4. One end of the cross guide block 3 is mounted in a guide groove Ⅰ at the top of the base 1, and the other end is mounted in a guide groove Ⅱ on one side of the connecting rod 2. The limit seat 4 is mounted on a positioning stop at the top of the base 1. The limit seat 4 is fixed to the base 1 by a fastener 5. The connecting rod 2 cooperates with the cross guide block 3 and the limit seat 4 to limit the connecting rod 2 on the base 1, and the connecting rod 2 can only move in a vertical direction (i.e., x direction) or a parallel direction (i.e., y direction) relative to the base 1.

[0015] A square groove is provided at the bottom of the base 1, and round holes are provided at both ends of the bottom of the square groove. Springs 9 are installed in the round holes, and a telescopic block 7 is installed in the square groove. Contacts 6 are symmetrically provided at both ends of the telescopic block 7. A limiting groove is provided on the side of the telescopic block 7. The limiting member 8 in the limiting groove is inserted into the side through hole of the base 1. The telescopic block 7 moves freely along the square groove of the base 1 with the cooperation of the spring 9 and the limiting member 8, and the two contacts 6 on the telescopic block 7 move in a telescopic straight line (i.e., z direction) parallel to the base 1.

[0016] The other end of the connecting rod 2 is connected to a probe I12, which is located on the center line of the guide groove of the connecting rod 2. A guide hole is provided on the connecting rod 2, in which a sliding seat 14, a screw II15 and a nut 16 are provided. Probes II13 are symmetrically provided at both ends of the sliding seat 14. The distance between probes I12 and II13 forms an isosceles triangle. The contact 6, probe I12 and probe II13 are parallel to each other and are perpendicular to the connecting rod 2. Probes I12 and probe II13 are inserted into the axial hole of the valve body to select a suitable position. After the axial hole is clamped, the screw II15 is tightened to limit the position of the connecting rod 2.

[0017] The limit seat 4 is provided with a square hole for the caliper to be inserted for measurement. The inner side of the limit seat 4 is provided with a long groove, in which a square nut 10 is installed. The threaded hole of the square nut 10 is matched with a screw Ⅰ11 passing through the square hole of the limit seat 4, and the end of the screw Ⅰ11 is stuck in the linear groove on the back of the connecting rod 2. When the screw Ⅰ11 is loosened, the connecting rod 2 moves along the y direction, driving the square nut 10 and the screw Ⅰ11 to move together. After tightening the screw Ⅰ11, the base 1 and the connecting rod 2 are fixed in position.

[0018] When in use, the base 1 is close to the side of the valve seat, find a suitable position, the contact 6 is close to the channel in the valve body, the contact 6 and the channel in the valve body should maintain a certain amount of compression, stabilize the base 1, move the connecting rod 2 so that the probe Ⅰ12 fixed to the connecting rod 2 is in full contact with the shaft hole and is the farthest distance from the valve seat, tighten the screw Ⅰ11 to fix the connecting rod 2 and the base 1, move the other two movable probes Ⅱ13, tighten the screw Ⅱ15 after the position is suitable, and the connecting rod 2 is limited and fixed to the shaft hole. Loosen the screw Ⅰ11 at the base 1, fine-tune the base 1 so that the two contacts 6 are in full contact with the channel in the valve body, and tighten the screw Ⅰ11 at the base 1 again. Through the above steps, the eccentricity of the valve body is equivalently converted to this measuring device, and the corresponding dimensions of this device are measured with a caliper to obtain the actual eccentricity a and b of the valve body.

[0019] Method for obtaining the eccentricity: Use a caliper to measure the distance L1 from the base 1 of the device to the probe Ⅰ12, and measure the distances L2 and L3 from the two sides of the connecting rod 2 to the two sides of the base 1. The radius R of the shaft hole can be directly measured and obtained. The distance h from the side of the valve seat to the center line of the seal is known. The eccentricity a=L1-Rh, and the eccentricity b=(L2-L3) / 2.

[0020] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A device for measuring the eccentricity of a triple eccentric butterfly valve body, characterized in that: It includes a cross guide block, a base, a connecting rod, and a limit seat. One end of the cross guide block is installed in the guide groove I at the top of the base, and the other end is installed in the guide groove II on one side of the connecting rod. The limit seat is installed on the positioning stop at the top of the base, and the limit seat is fixed to the base by fasteners. The bottom of the base is provided with a square groove, and the two ends of the bottom of the square groove are provided with round holes, and springs are installed in the round holes. A telescopic block is installed in the square groove, and contacts are symmetrically provided at both ends of the telescopic block. A limit groove is provided on the side of the telescopic block, and the limit piece in the limit groove is inserted into the side through hole of the base. The other end of the connecting rod is connected to a probe I. The probe I is located on the center line of the guide groove of the connecting rod. The connecting rod is provided with a guide hole, and a sliding seat, a screw II and a nut are matched in the guide hole. Probes II are symmetrically provided at both ends of the sliding seat. The distance between the probes I and II forms an isosceles triangle. The contact, probe I and probe II are parallel to each other and are all perpendicular to the connecting rod. A square hole is provided on the limit seat, and a long groove is provided on the inner side of the limit seat. A square nut is installed in the long groove. The threaded hole of the square nut is matched with a screw I that passes through the square hole of the limit seat, and the end of the screw I is stuck in the straight groove on the back of the connecting rod.

2. A device for measuring the eccentricity of a triple eccentric butterfly valve body according to claim 1, characterized in that: The top of the contact is in a semi-spherical shape.

3. A device for measuring the eccentricity of a triple eccentric butterfly valve body as claimed in claim 2, characterized in that: The connection between the connecting rod and the probe I is replaceable.

4. A device for measuring the eccentricity of a triple eccentric butterfly valve body as claimed in claim 3, characterized in that: The connection mode between the sliding seat and the probe II is replaceable.

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