Spiral push-pull device

Abstract

The utility model belongs to the field of measurement, and relates to a spiral push-pull device which comprises a spiral linkage piece, a driving piece and a push-pull fixing piece. The push-pull fixing piece extends into the spiral linkage piece; the driving piece is connected with the spiral linkage piece and drives the push-pull fixing piece to move in the axial direction of the push-pull fixing piece through the spiral linkage piece. The spiral push-pull device provided by the utility model can effectively improve the working efficiency and can obviously improve the calibration precision.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of measurement relates to a correction is used to push and pull ware, especially in a spiral push and pull ware. BACKGROUND

[0002] Current flowmeter is used artificial manual to carry out measurement to pipeline first when correcting pipeline, is repeatedly bent to pipeline with manpower after measurement or adopts the mode of correction push and pull ware to carry out correction. The existing correction push and pull ware, most of a motor direct drive connecting block, push and pull operation is carried out to the measuring pipe through the connecting block, and the correction of the measuring pipe is finally realized. However, such mode is directly determined by the output power of the motor or the torque of the motor, which is easy to cause excessive operation, resulting in time-consuming and laborious pipeline correction process, and the measuring pipe correction accuracy is not high due to frequent operation. UTILITY MODEL CONTENTS

[0003] In order to solve the above technical problems existing in the background art, the utility model provides a spiral push and pull ware which can effectively improve work efficiency and obviously improve calibration accuracy.

[0004] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0005] A spiral push and pull ware, characterized in that: the spiral push and pull ware comprises a spiral linkage, a driving piece and a push and pull fixing piece; the push and pull fixing piece extends into the spiral linkage; the driving piece is connected with the spiral linkage and drives the push and pull fixing piece to move along the axial direction of the push and pull fixing piece through the spiral linkage.

[0006] The above-mentioned spiral linkage comprises a spiral push and pull mechanism and a spiral fixing ring; the spiral push and pull mechanism is arranged in the spiral fixing ring; one end of the push and pull fixing piece is embedded in the spiral push and pull mechanism; the driving piece is connected with the spiral push and pull mechanism and drives the spiral push and pull mechanism to rotate around the circumferential direction of the spiral push and pull mechanism; the spiral push and pull mechanism drives the push and pull fixing piece to move along the axial direction of the push and pull fixing piece.

[0007] The above-mentioned spiral push and pull mechanism is provided with a spiral pushing groove in the radial direction; the end of the push and pull fixing piece is embedded in the spiral pushing groove after penetrating through the spiral fixing ring and moves along the axial direction of the push and pull fixing piece in the spiral pushing groove along with the rotation of the spiral push and pull mechanism.

[0008] The side wall of the above-mentioned spiral fixing ring is provided with a through hole; one end of the push and pull fixing piece extends into the spiral fixing ring from the through hole and is embedded in the spiral pushing groove.

[0009] The side wall of the above-mentioned spiral fixing ring is provided with a working window along the axial direction of the spiral fixing ring; the driving piece is arranged in the working window along the axial direction of the working window and is engaged with the circumferential direction of the spiral push and pull mechanism.

[0010] The push-pull fixing member is a C-shaped push-pull rod; one end of the C-shaped push-pull rod extends into the screw fixing ring from the through hole and is embedded in the screw pushing groove.

[0011] The C-shaped push-pull rod comprises a C-shaped groove, a semi-cylindrical connecting rod and a sliding ball; the C-shaped groove is connected with the sliding ball through the semi-cylindrical connecting rod; the semi-cylindrical connecting rod extends into the screw fixing ring from the through hole; and the sliding ball is embedded in the screw pushing groove and moves along the axial direction of the push-pull fixing member along with the rotation of the screw pushing mechanism.

[0012] The sliding ball is in clearance fit with the screw pushing groove.

[0013] The driving member comprises a motor and a gear shaft; the motor is connected with the gear shaft; the gear shaft is connected with the screw linkage; and the motor drives the screw linkage to rotate through the gear shaft.

[0014] The motor is a servo motor.

[0015] The utility model discloses a spiral push -and -pull ware, including screw linkage, driving part and push -and -pull fixed part, push -and -pull fixed part extends into screw linkage, driving part is connected with screw linkage and drives push -and -pull fixed part to move along the axial direction of push -and -pull fixed part through screw linkage.

[0016] The utility model discloses a spiral push -and -pull ware, including screw linkage, driving part and push -and -pull fixed part, push -and -pull fixed part extends into screw linkage, driving part is connected with screw linkage and drives push -and -pull fixed part to move along the axial direction of push -and -pull fixed part through screw linkage. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of spiral push -and -pull ware provided by the utility model;

[0018] Figure 2 It is the front view structure schematic diagram of spiral push -and -pull ware provided by the utility model;

[0019] Figure 3 It is the structure schematic diagram of C-shaped push -and -pull rod adopted by the utility model;

[0020] Figure 4 It is the structure schematic diagram of screw fixing ring adopted by the utility model;

[0021] Figure 5 It is the structure schematic diagram of screw pushing mechanism adopted by the utility model;

[0022] Among them:

[0023] 51 - motor; 52 - gear shaft; 53 - screw push-pull mechanism; 54 - screw fixing ring; 55 - C-shaped push-pull rod; 551 - C-shaped groove; 552 - semi-cylindrical connecting rod; 553 - sliding ball. DETAILED DESCRIPTION

[0024] With reference to Figure 1 The screw push-pull device comprises a screw linkage, a driving member and a push-pull fixing member. The push-pull fixing member extends into the screw linkage. The driving member is connected with the screw linkage and drives the push-pull fixing member to move along the axial direction of the push-pull fixing member through the screw linkage.

[0025] The screw linkage comprises a screw push-pull mechanism 53 and a screw fixing ring 54. The screw push-pull mechanism 53 is arranged in the screw fixing ring 54. One end of the push-pull fixing member is embedded in the screw push-pull mechanism 53. The driving member is connected with the screw push-pull mechanism 53 and drives the screw push-pull mechanism 53 to rotate around the circumferential direction of the screw push-pull mechanism 53. The screw push-pull mechanism 53 drives the push-pull fixing member to move along the axial direction of the push-pull fixing member.

[0026] With reference to Figure 5 The screw push-pull mechanism 53 is provided with a screw pushing groove in the radial direction. The end of the push-pull fixing member is embedded in the screw pushing groove after penetrating through the screw fixing ring 54 and moves along the axial direction of the push-pull fixing member with the rotation of the screw push-pull mechanism 53 in the screw pushing groove. With reference to Figure 1 、 Figure 2 and Figure 4 The screw fixing ring 54 is provided with a through hole in the side wall. One end of the push-pull fixing member extends into the screw fixing ring 54 from the through hole and is embedded in the screw pushing groove. In addition, the side wall of the screw fixing ring 54 is provided with a working window in the axial direction of the screw fixing ring 54. The driving member is arranged in the working window in the axial direction of the working window and is engaged with the circumferential direction of the screw push-pull mechanism 53.

[0027] With reference to Figure 3The push-pull fixing part used in the utility model is a C-shaped push-pull rod 55; one end of the C-shaped push-pull rod 55 extends into the spiral fixing ring 54 from the through hole and is embedded in the spiral pushing groove. Exemplarily, the C-shaped push-pull rod 55 comprises a C-shaped groove 551, a semi-cylindrical connecting rod 552 and a sliding ball 553; the C-shaped groove 551 is connected with the sliding ball 553 through the semi-cylindrical connecting rod 552; the semi-cylindrical connecting rod 552 extends into the spiral fixing ring 54 from the through hole; and the sliding ball 553 is embedded in the spiral pushing groove and moves along the axial direction of the push-pull fixing part along with the rotation of the spiral pushing and pulling mechanism 53 in the spiral pushing groove. The C-shaped groove 551 acts on the to-be-calibrated measuring pipe, the end face of which is in close contact with the pipe wall of the to-be-calibrated measuring pipe, that is, surface contact, so that the to-be-calibrated measuring pipe can be pushed and pulled. Exemplarily, the end of the C-shaped groove 551, especially the part in contact with the to-be-calibrated measuring pipe, is provided in a semicircular shape, which acts to exert uniform force on the pipe wall of the to-be-calibrated measuring pipe 2, so that the local deformation of the C-shaped groove 551 when it exerts pressure on the pipe wall is minimized, and the stability of the influence of the pipeline on the flowmeter is improved. In order to facilitate the relative sliding of the sliding ball 553 and the spiral pushing groove, the two are in clearance fit.

[0028] The driving part comprises a motor 51 and a gear shaft 52; the motor 51 is connected with the gear shaft 52; the gear shaft 52 is connected with the spiral linkage; and the motor 51 drives the spiral linkage to rotate through the gear shaft 52. Exemplarily, the gear shaft 52 is connected with the spiral pushing and pulling mechanism 53 and drives the spiral pushing and pulling mechanism 53 to rotate around the circumferential direction of the spiral pushing and pulling mechanism 53. It should be noted that the diameter of the gear shaft is much smaller than the diameter of the spiral pushing and pulling mechanism. The combination of the spiral pushing and pulling mechanism and the gear shaft realizes the deceleration of the rotation of the motor due to the large difference in radius, thereby further amplifying the control accuracy of the motor. The sliding connection between the spiral pushing and pulling mechanism and the C-shaped push-pull rod is in the form of a spherical and semispherical groove, which can make the C-shaped push-pull rod change linearly when it is stretched and contracted, and its effect is equivalent to that of an enlarged version of a threaded connection, but its control accuracy is higher than that of a screw and nut connection of the same size, thereby improving the pushing and pulling accuracy of the measuring pipe. In addition, the helix angle of the spiral pushing and pulling mechanism is smaller than the equivalent friction angle of the sliding connection between the spiral pushing and pulling mechanism and the C-shaped push-pull rod, that is, the self-locking condition is met. The spiral pushing and pulling mechanism used in the utility model can realize the forward and reverse correction of the pipeline through the forward and reverse rotation of the spiral pushing and pulling mechanism. Exemplarily, the motor 51 mentioned in the utility model is a servo motor.

[0029] Referring to Figure 1 and Figure 2 The working process of the spiral pushing and pulling device provided by the utility model in specific use is as follows: the motor 51 drives the gear shaft 52 to rotate, the gear shaft 52 drives the spiral pushing and pulling mechanism 53 to rotate, and the spiral pushing and pulling mechanism 53 drives the C-shaped push-pull rod to push or pull the to-be-calibrated measuring pipe, thereby realizing forward and reverse correction.

Claims

1. A screw push-puller characterized by: The screw linkage comprises a screw linkage, a driving member and a push-pull fixing member; the push-pull fixing member extends into the screw linkage; the driving member is connected with the screw linkage and drives the push-pull fixing member to move along the axial direction of the push-pull fixing member through the screw linkage.

2. The screw push-puller of claim 1, wherein: The screw linkage comprises a screw push-pull mechanism (53) and a screw fixing ring (54); the screw push-pull mechanism (53) is arranged in the screw fixing ring (54); one end of the push-pull fixing member is embedded in the screw push-pull mechanism (53); the driving member is connected with the screw push-pull mechanism (53) and drives the screw push-pull mechanism (53) to rotate around the circumferential direction of the screw push-pull mechanism (53); the screw push-pull mechanism (53) drives the push-pull fixing member to move along the axial direction of the push-pull fixing member.

3. The screw push-puller of claim 2, wherein: The screw push-pull mechanism (53) is radially provided with a screw advancing groove; the end of the push-pull fixing member is embedded in the screw advancing groove after penetrating through the screw fixing ring (54) and moves along the axial direction of the push-pull fixing member with the rotation of the screw push-pull mechanism (53) in the screw advancing groove.

4. The screw push-puller of claim 3, wherein: The side wall of the screw fixing ring (54) is provided with a through hole; one end of the push-pull fixing member extends into the screw fixing ring (54) from the through hole and is embedded in the screw advancing groove.

5. The screw push-puller of claim 4, wherein: The side wall of the screw fixing ring (54) is provided with a working window along the axial direction of the screw fixing ring (54); the driving member is arranged in the working window along the axial direction of the working window and is engaged with the circumferential direction of the screw push-pull mechanism (53).

6. The screw push-puller of claim 5, wherein: The push-pull fixing member is a C-shaped push-pull rod (55); one end of the C-shaped push-pull rod (55) extends into the screw fixing ring (54) from the through hole and is embedded in the screw advancing groove.

7. The screw push-puller of claim 6, wherein: The C-shaped push-pull rod (55) comprises a C-shaped groove (551), a semi-cylindrical connecting rod (552) and a sliding ball (553); the C-shaped groove (551) is connected with the sliding ball (553) through the semi-cylindrical connecting rod (552); the semi-cylindrical connecting rod (552) extends into the screw fixing ring (54) from the through hole; the sliding ball (553) is embedded in the screw advancing groove and moves along the axial direction of the push-pull fixing member in the screw advancing groove with the rotation of the screw push-pull mechanism (53).

8. The screw push-puller of claim 7, wherein: The sliding ball (553) is clearance-fitted with the screw advancing groove.

9. The screw push-puller of any one of claims 1-8, wherein: The driving member comprises a motor (51) and a gear shaft (52); the motor (51) is connected with the gear shaft (52); the gear shaft (52) is connected with the screw linkage; the motor (51) drives the screw linkage to rotate through the gear shaft (52).

10. The screw push-puller of claim 9, wherein: The motor (51) is a servo motor.

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