Miniature manual meter clamping device

Abstract

The utility model discloses a miniature hand-operated meter clamping device, which relates to the technical field of meter clamping devices and comprises a casing, a driving shaft is mounted on one side in the casing, worms are symmetrically sleeved on the surface of the driving shaft, bearing seats are symmetrically mounted on two sides in the casing, and bearings are symmetrically mounted on the bearing seats. A lock nut sleeve is rotatably installed between every two adjacent bearing seats on the two sides in the machine shell, worm wheels are fixedly arranged on the surfaces of the two lock nut sleeves in a sleeving mode, the number of the worm wheels is two, and lead screws are installed in the two lock nut sleeves in a threaded mode. The mass of a cylinder structure is not needed, the mass of sealing covers for front and rear sealing structures is reduced, other auxiliary power equipment is not needed, manual operation is directly carried out, conversion use smaller than a designed pipe diameter can be achieved by replacing a butt flange short joint, and the matching range of the device can be expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of meter clamps, in particular to a miniature manual meter clamp. Background Art

[0002] Traditional flow standard devices all use meter clamps for quick installation and replacement of the measured flow meter. According to the installation requirements of the flow meter, a certain straight pipe section must be guaranteed. Therefore, it is hoped that the inner diameter of the meter clamp is consistent with the inner diameter of the flow meter. In addition, the current detection task of flow meters with a diameter of ≤DN25mm is increasing. The metrology department needs a skid-mounted detection equipment that is easy to carry on a vehicle. The only power supply available on site is AC220V, and the space for vehicle transportation is generally only 1mx1mx0.8m in length, width and height. Therefore, the spatial structure of the meter clamp needs to be as small as possible, the weight should be lightweight, and the fewer supporting equipment carried, the better.

[0003] However, the industry currently mostly adopts the principle of using air as the power source and the cylinder as the actuator. In this structure, the cylinder stroke is selected according to the design, and the length of the inner sleeve of the meter clamp must be greater than twice the design stroke, that is, the inherent size of the cylinder structure plus the stroke, where the inherent size includes the thickness of the front and rear covers of the cylinder plus the thickness of the cylinder piston ring. In order to ensure the sealing of the meter clamp after it is fully extended, the inner sleeve needs to be extended by more than twice the stroke. Finally, the total length of the meter clamp is relatively long. The meter clamp with a stroke of 100mm finally needs to have an installation length of 300-500mm. The structure is large, and the external dimensions cannot meet the requirements of miniaturization. The weight is bulky and not lightweight enough. In addition, an air pump is required as the power source. The supporting equipment has high requirements and needs to be driven by air source power. Utility Model Content

[0004] In order to solve the problems of existing meter clamp replacement devices such as bulky structure, external dimensions that cannot meet the requirements of miniaturization, heavy weight and not lightweight enough, high requirements for supporting equipment, and the need for air source power drive; the purpose of this utility model is to provide a miniature manual meter clamp.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a miniature manual meter clamp, comprising a casing, a driving shaft is installed on one side of the casing, and a worm is symmetrically sleeved on the surface of the driving shaft, and the number of the worms is two. Bearing seats are symmetrically installed on both sides of the casing, and a lock nut sleeve is rotatably installed between two adjacent bearing seats on both sides of the casing. The number of the lock nut sleeves is two, and a worm gear is fixedly sleeved on the surface of the two lock nut sleeves. The number of the worm gears is two, and the worm gear cooperates with the worm. A screw rod is threadedly installed in the two lock nut sleeves, and the number of the screw rods is two. A sleeve is fixedly sleeved in the middle of the casing, and a sliding rod is slidably installed on the sleeve. Fixing parts are fixedly installed on both ends of the sliding rod, and the number of the fixing parts is two. One end of the two fixing parts is fixedly installed with a connecting flange.

[0006] Preferably, a rotating shaft is fixedly mounted on the top end of the driving shaft, a crank is fixedly mounted on the top end of the rotating shaft, and the crank cooperates with the driving shaft through the rotating shaft.

[0007] Preferably, a diamond plate is fixedly installed at both ends of the two screw rods, and a positioning sleeve is fixedly installed between the two diamond plates at the adjacent ends of the two screw rods. The number of the positioning sleeves is two, and the two positioning sleeves are fixedly sleeved on the surface of the sliding rod. A threaded buckle is clamped in one side of the diamond plate, and the threaded buckle passes through the diamond plate and is threaded in the screw rod, and the threaded buckle cooperates with the diamond plate.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] 1. In the utility model, the device is compact and flexible to operate. The overall length is about 2.5 times the design stroke length. It is lightweight, has no cylinder structure, reduces the weight of the front and rear sealing structures, and does not require the configuration of other auxiliary power equipment. It can be operated directly by hand. The conversion of pipes smaller than the design diameter can be achieved by replacing the docking flange and short-circuiting, so that the matching range of the device can be expanded.

[0010] 2. In the present invention, both the screw rod and the lock nut use double helical threads to improve the transmission speed ratio of single-turn rotation, thereby accelerating the travel speed. The worm gear structure used can effectively prevent the meter clamp from loosening and prevent reverse transmission of motion, thereby achieving the requirement of preventing loosening. The two connecting flanges can expand the adaptability of the meter clamp, expand the detection adaptability, and stabilize the mechanical structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 This is a cross-sectional view of the internal structure of the casing of the utility model.

[0014] Figure 3 This is a schematic diagram of the internal structure of the casing of the utility model.

[0015] In the figure: 1. Casing; 11. Bearing seat; 12. Mounting seat; 121. Positioning hole; 2. Drive shaft; 21. Worm; 22. Rotating shaft; 23. Crank; 24. Rotating part; 3. Lock nut; 31. Worm gear; 4. Screw; 41. Diamond plate; 411. Threaded buckle; 42. Positioning sleeve; 5. Sleeve; 51. Sliding rod; 52. Fixing plate; 521. Positioning buckle; 53. Fixing part; 6. Connecting flange. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example: Figure 1-3 As shown, the utility model provides a miniature manual meter clamp, including a casing 1, a driving shaft 2 is installed on one side of the casing 1, and a worm 21 is symmetrically sleeved on the surface of the driving shaft 2, and the number of the worm 21 is two. Bearing seats 11 are symmetrically installed on both sides of the casing 1, and a lock nut sleeve 3 is rotatably installed between two adjacent bearing seats 11 on both sides of the casing 1. The number of the lock nut sleeves 3 is two, and the surfaces of the two lock nut sleeves 3 are fixedly sleeved with worm gears 31. The number of the worm gears 31 is two, and the worm gears 31 cooperate with the worm 21. A screw rod 4 is threadedly installed in the two lock nut sleeves 3, and the number of the screw rods 4 is two. A sleeve 5 is fixedly sleeved in the middle of the casing 1, and a sliding rod 51 is slidably installed on the sleeve 5. Fixing parts 53 are fixedly installed on both ends of the sliding rod 51, and the number of the fixing parts 53 is two. One end of the two fixing parts 53 is fixedly installed with a connecting flange 6;

[0018] Manually turn the crank 23, and the crank 23 controls the rotating shaft 22 to drive the drive shaft 2 to rotate. When the drive shaft 2 rotates, the two worms 21 are controlled to rotate synchronously. Under the cooperation of the bearing seats 11 at both ends of each lock nut sleeve 3, the two worm wheels 31 installed by the lock nut sleeve 3 are driven to rotate synchronously by the two synchronously rotating worms 21. When the lock nut sleeve 3 rotates, the sliding rod 51 in the sleeve 5 and the diamond plates 41 installed at both ends of the two screw rods 4 and the corresponding positioning sleeves 42 cooperate to control the two screw rods 4 to make linear motion, thereby controlling the two ends of the sliding rod 51 by the connecting flange 6 through the two screw rods 4. The installed meter clamp moves linearly to realize manual extension and retraction of the meter clamp (the housing 1 of this miniature manual meter clamp is made of eight millimeters thick carbon steel plate, and the two lock nut sleeves 3 and the screw rod 4 are both T sixteen models). The screw rod 4 and the lock nut sleeve 3 in this device both use double helical threads to improve the transmission speed ratio of single-turn rotation, thereby speeding up the stroke speed. The structure of the worm wheel 31 and the worm 21 used can effectively prevent the loosening of the meter clamp and prevent reverse transmission of motion, thereby achieving the requirement of preventing loosening. The two connecting flanges 6 can expand the adaptability of the meter clamp, expand the detection adaptability, and have a stable mechanical structure.

[0019] A rotating shaft 22 is fixedly installed on the top of the driving shaft 2, and a crank 23 is fixedly installed on the top of the rotating shaft 22. The crank 23 cooperates with the driving shaft 2 through the rotating shaft 22, and the connection between the crank 23 and the driving shaft 2 is completed through the rotating shaft 22. The rotating shaft 22 is controlled by the crank 23 to drive the driving shaft 2 to rotate.

[0020] A diamond plate 41 is fixedly installed at both ends of the two screw rods 4, and a positioning sleeve 42 is fixedly installed between the two diamond plates 41 at the adjacent ends of the two screw rods 4. There are two positioning sleeves 42, and the two positioning sleeves 42 are fixedly sleeved on the surface of the slide rod 51. The installation and fixation of a positioning sleeve 42 are completed through the two diamond plates 41 at the adjacent ends of the two screw rods 4. Under the cooperation of the two positioning sleeves 42, the auxiliary slide rod 51 controls the movement of the two screw rods 4 to complete the guiding work of the screw rods 4.

[0021] A threaded buckle 411 is clamped in one side of the diamond plate 41. The threaded buckle 411 passes through the diamond plate 41 and is threadedly clamped in the screw rod 4. The threaded buckle 411 cooperates with the diamond plate 41, and the diamond plate 41 is installed and fixed at both ends of the two screw rods 4 through the corresponding threaded buckle 411 of the diamond plate 41.

[0022] Both ends of the surface of the sleeve 5 are fixed with fixing plates 52, and there are two fixing plates 52. Positioning buckles 521 are clamped in the four corners of the two fixing plates 52. The positioning buckles 521 pass through the fixing plates 52 and are threaded in the casing 1. The sleeve 5 is installed and fixed in the casing 1 through the two fixing plates 52 and the corresponding positioning buckles 521.

[0023] Both ends of the surface of the drive shaft 2 are sleeved with rotating parts 24. There are two rotating parts 24, which are fixedly installed on both sides of the casing 1 respectively. The rotating parts 24 cooperate with the drive shaft 2. The installation and positioning of the drive shaft 2 in the casing 1 are completed by the two rotating parts 24. At the same time, the auxiliary drive shaft 2 rotates in the casing 1, thereby increasing the stability of the drive shaft 2 during rotation. A mounting base 12 is fixedly installed on the bottom surface of the casing 1. Positioning holes 121 are provided at the four corners of the top surface of the mounting base 12. The device is installed in the designated area and fixed by using the four positioning holes 121 opened in the four corners of the top surface of the mounting base 12 and the corresponding bolts.

[0024] Working principle: manually turn the crank 23, and the crank 23 controls the rotating shaft 22 to drive the drive shaft 2 to rotate. When the drive shaft 2 rotates, the two worms 21 are controlled to rotate synchronously. With the cooperation of the bearing seats 11 at both ends of each lock nut sleeve 3, the two worm wheels 31 installed by the lock nut sleeve 3 are driven to rotate synchronously by the two synchronously rotating worms 21. When the lock nut sleeve 3 rotates, the sliding rod 51 in the sleeve 5 and the diamond plates 41 and the corresponding positioning sleeves 42 installed at both ends of the two screw rods 4 are controlled to make linear motion, so that the meter clamp installed by the connecting flange 6 at both ends of the sliding rod 51 is controlled by the two screw rods 4 to move linearly, thereby realizing manual extension and retraction of the meter clamp.

[0025] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A miniature manual meter clamp, comprising a housing (1), characterized in that: A drive shaft (2) is installed on one side of the housing (1), and a worm (21) is symmetrically sleeved on the surface of the drive shaft (2), and the number of the worms (21) is two. Bearing seats (11) are symmetrically installed on both sides of the housing (1), and a lock nut (3) is rotatably installed between two adjacent bearing seats (11) on both sides of the housing (1). The number of the lock nut (3) is two, and a worm gear (31) is fixedly sleeved on the surface of the two lock nut sleeves (3). The number of the worm gears (31) is The number of screw rods (4) is two, the worm wheel (31) and the worm (21) cooperate with each other, the two lock nut sleeves (3) are threadedly installed with screw rods (4), the number of screw rods (4) is two, the middle inner fixed sleeve of the housing (1) is provided with a sleeve (5), the sleeve (5) is slidably installed with a slide rod (51), both ends of the slide rod (51) are fixedly installed with fixing parts (53), the number of fixing parts (53) is two, and one end of the two fixing parts (53) is fixedly installed with a connecting flange (6).

2. The miniature manual meter clamp according to claim 1, characterized in that: A rotating shaft (22) is fixedly mounted on the top end of the driving shaft (2), and a crank (23) is fixedly mounted on the top end of the rotating shaft (22). The crank (23) cooperates with the driving shaft (2) via the rotating shaft (22).

3. The miniature manual meter clamp according to claim 1, characterized in that: Both ends of the two screw rods (4) are fixedly mounted with diamond plates (41), and a positioning sleeve (42) is fixedly mounted between the two diamond plates (41) at adjacent ends of the two screw rods (4). The number of the positioning sleeves (42) is two, and the two positioning sleeves (42) are fixedly mounted on the surface of the slide rod (51).

4. The miniature manual meter clamp according to claim 3, characterized in that: A threaded buckle (411) is provided on one side of the diamond plate (41), the threaded buckle (411) passes through the diamond plate (41) and is threadedly provided in the screw rod (4), and the threaded buckle (411) and the diamond plate (41) cooperate with each other.

5. The miniature manual meter clamp according to claim 1, characterized in that: Both ends of the surface of the sleeve (5) are fixedly provided with fixing plates (52), the number of the fixing plates (52) being two, and positioning buckles (521) are clamped in the four corners of the two fixing plates (52), and the positioning buckles (521) pass through the fixing plates (52) and are threadedly clamped in the housing (1).

6. The miniature manual meter clamp according to claim 1, characterized in that: Rotating members (24) are sleeved on both ends of the surface of the drive shaft (2). There are two rotating members (24). The two rotating members (24) are fixedly mounted on both sides of the housing (1). The rotating members (24) cooperate with the drive shaft (2).

7. The miniature manual meter clamp according to claim 1, characterized in that: A mounting seat (12) is fixedly mounted on the bottom surface of the housing (1), and positioning holes (121) are provided at four corners of the top surface of the mounting seat (12).

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