Positioning fixture for external clamping type ultrasonic flow sensor

Abstract

A positioning clamp for an external clamping type ultrasonic flow sensor comprises positioning seats arranged in a bilateral symmetry mode, a guide rail arranged between the positioning seats and an upper cover above the guide rail, a positioning box is installed in the guide rail in a sliding mode and used for containing a sensor body, the upper portion of the positioning box is connected with the upper cover, and the positioning seats are bound and positioned on the outer wall of a pipeline through stainless steel ribbons; a guide groove is machined in the middle of the upper cover in the length direction, scale marks are arranged on the edge of the upper portion of the guide groove, and a positioning screw is fixedly arranged in the center of the upper portion of the positioning box and locked and positioned by a locking nut after penetrating through the guide groove in a matched mode. According to the structure, the sensor body is placed in the mounting positioning box slidably arranged in the guide rail, the scale marks are marked on the upper cover above the guide rail, the position of the sensor body can be quickly adjusted and positioned, the mounting precision is high, the two ends of the guide rail are connected with the positioning seats and are bound and positioned on a pipeline through stainless steel ribbons, the structure is stable, and the universality is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to a positioning fixture for outer clamping type ultrasonic wave flow sensor. BACKGROUND

[0002] The ultrasonic wave flow meter adopts the principle of the propagation speed difference method, measures the speed difference of ultrasonic wave pulses in the fluid to reflect the flow rate of the fluid, and calculates the flow rate. The ultrasonic wave flow meter is a non-contact measuring instrument, and the outer clamping type ultrasonic wave sensor is directly bound to the outer wall of the measured pipeline. The ultrasonic wave flow meter has the characteristics of not changing the flow state of the fluid, no pressure loss, no need to stop production, simple installation, and can be used to measure the flow of strong corrosive, non-conductive, high temperature and high pressure, flammable and explosive, radioactive fluid which is difficult to measure by other types of instruments. The existing ultrasonic wave flow meter has certain disadvantages during installation, and has the problems of many installation accessories, inconvenient position adjustment, and relatively troublesome installation and disassembly. SUMMARY

[0003] In view of the above problems, the utility model provides a positioning fixture for outer clamping type ultrasonic wave flow sensor.

[0004] In order to achieve the above purpose, the utility model provides a positioning fixture for outer clamping type ultrasonic wave flow sensor, which comprises left-right symmetrical positioning seats, guide rails arranged between the positioning seats, and upper covers arranged above the guide rails. Positioning boxes are slidably installed in the guide rails and used for accommodating sensor bodies. The upper parts of the positioning boxes are connected with the upper covers. The positioning seats are positioned on the outer wall of the pipeline by means of stainless steel straps.

[0005] Vertical positioning bolts are arranged on the upper parts of the positioning seats and used for connecting the connecting blocks at the two ends of the guide rails and the upper covers.

[0006] A guide groove is formed in the middle part of the upper cover along the length direction. Scale lines are arranged on the upper edge of the guide groove. A positioning screw is fixedly arranged at the center of the upper part of the positioning box. The positioning screw is locked and positioned by a locking nut after penetrating through the guide groove.

[0007] As a further improvement of the utility model, the positioning seat comprises a pair of positioning plates and a connecting plate arranged between the positioning plates. The positioning bolts are arranged in the middle part of the connecting plate. The lower parts of the positioning plates are spaced and positioned by shaft sleeves and connected and fixed by bolt connecting pieces. The shaft sleeves form a through slot for the stainless steel strap to penetrate.

[0008] As a further improvement of the utility model, a slot is formed in the upper part of the positioning plate. The connecting plate extends into the slot on both sides.

[0009] As a further improvement of this utility model, the positioning bolt passes through the connecting block and is locked by the positioning nut. A connecting hole is machined in the middle of the connecting block. The upper part of the positioning bolt passes through the upper cover and is locked by the wing nut. Connecting holes I are machined at both ends of the upper cover.

[0010] As a further improvement of this utility model, guide blocks are provided on the upper part of the positioning box and on both sides of the positioning screw, and the guide blocks extend into the guide groove.

[0011] As a further improvement of this utility model, the lower part of the mounting and positioning box has an opening and a receiving cavity is formed. The sensor body is placed in the receiving cavity, and the cable on the side wall of the sensor body passes through the connection block and the top cover.

[0012] The beneficial effects of this utility model are as follows:

[0013] In this structure, the sensor body is placed in a mounting and positioning box that slides within a guide rail. The upper cover above the guide rail has a guide groove with graduated lines. The upper part of the mounting and positioning box has a positioning screw that passes through the guide groove and is positioned by locking the nut. The position of the sensor body can be quickly adjusted and positioned with high installation accuracy. The two ends of the guide rail are connected to positioning seats and are fixed to the outer wall of the pipe by stainless steel cable ties. It is suitable for positioning on pipes of different diameters, with stable structure and good versatility. Attached Figure Description

[0014] Figure 1 This is a front view of a positioning clamp for an external clamp-on ultrasonic flow sensor according to the present invention.

[0015] Figure 2 This is a side view of a positioning clamp for an external clamp-on ultrasonic flow sensor according to the present invention.

[0016] Figure 3 This is the front view of positioning seat 1;

[0017] Figure 4 This is the front view of guide rail 3;

[0018] Figure 5 This is a bottom view of guide rail 3;

[0019] Figure 6 This is a top view of the top cover 4;

[0020] Figure 7 This is a schematic diagram of the operation of a positioning clamp for an external clamp-on ultrasonic flow sensor according to the present invention. Figure 1 ;

[0021] Figure 8 This is a schematic diagram of the operation of a positioning clamp for an external clamp-on ultrasonic flow sensor according to the present invention.Figure 2 .

[0022] In the diagram: 1. Positioning seat; 11. Positioning plate; 111. Slot; 12. Connecting plate; 13. Bushing; 14. Bolt connector; 15. Through slot; 2. Positioning bolt; 21. Positioning nut; 22. Wing nut; 3. Guide rail; 31. Connecting block; 32. Connecting hole; 4. Top cover; 41. Connecting hole I; 42. Guide groove; 43. Scale line; 5. Positioning box; 51. Receiving cavity; 52. Guide block; 53. Positioning screw; 54. Locking nut; 6. Sensor body; 61. Cable; 7. Pipe; 8. Stainless steel cable tie. Detailed Implementation

[0023] like Figures 1-2 As shown in the embodiment of this utility model, a positioning fixture for an external clamp-on ultrasonic flow sensor includes a positioning seat 1 symmetrically arranged on the left and right, a guide rail 3 arranged between the positioning seats 1, and an upper cover 4 arranged above the guide rail 3. A positioning box 5 is slidably installed inside the guide rail 3 to accommodate the sensor body 6. The upper part of the positioning box 5 is connected to the upper cover 4. The positioning seat 1 is fixed to the outer wall of the pipe 7 by a stainless steel cable tie 8.

[0024] The upper part of the positioning seat 1 is vertically provided with positioning bolts 2 for connecting the connecting blocks 31 at both ends of the guide rail 3 and the upper cover 4. The positioning seat 1 includes a pair of positioning plates 11 and a connecting plate 12 located between the positioning plates 11. The upper part of the positioning plate 11 is machined with a slot 111, and the two sides of the connecting plate 12 extend into the slot 111 respectively. The positioning bolts 2 are located in the middle of the connecting plate 12. The lower part of the positioning plate 11 is positioned at intervals by bushings 13 and is connected and fixed by bolt connectors 14. A through groove 15 is formed between the bushings 13 for the stainless steel cable tie 8 to pass through (see...). Figure 3 );

[0025] After the positioning bolt 2 passes through the connecting block 31, it is locked by the positioning nut 21. The connecting block 31 has a connecting hole 32 machined in the middle (see...). Figure 4 , Figure 5 The positioning bolt 2 passes through the upper cover 4 and is then locked by the wing nut 22. The upper cover 4 has corresponding connecting holes I41 machined at both ends.

[0026] The upper cover 4 has a guide groove 42 machined along its length in the middle, and the upper edge of the guide groove 42 has a scale line 43 (see Figure 6 The positioning box 5 has a positioning screw 53 fixed at the center of the upper part. The positioning screw 53 passes through the guide groove 42 and is locked by the locking nut 54. The positioning box 5 has guide blocks 52 on the upper part and both sides of the positioning screw 53. The guide blocks 52 extend into the guide groove 42.

[0027] The lower opening of the mounting positioning box 5 forms a receiving cavity 51. The sensor body 6 is placed in the receiving cavity 51, and the cable 61 on the side wall of the sensor body 6 passes through the connection block 31 and the top cover 4.

[0028] In this structure, the sensor body is placed in a mounting and positioning box that slides within a guide rail. The upper cover above the guide rail has a guide groove with graduated lines. The upper part of the mounting and positioning box has a positioning screw that passes through the guide groove and is positioned by locking the nut. The position of the sensor body can be quickly adjusted and positioned with high installation accuracy. The two ends of the guide rail are connected to positioning seats and are fixed to the outer wall of the pipe by stainless steel cable ties. It is suitable for positioning on pipes of different diameters, with stable structure and good versatility.

[0029] In practical use, to facilitate understanding of this utility model, the following description is provided in conjunction with the accompanying drawings;

[0030] Depending on the pipe diameter and wall thickness, a positioning clamp can be installed on one side of the pipe's outer wall. Two sets of mounting boxes are fitted inside the positioning clamp's guide rail to accommodate the sensor body (see [link]). Figure 8 Alternatively, positioning clamps can be symmetrically installed on both sides of the outer wall of the pipe. In this case, only one set of mounting and positioning boxes needs to be installed inside the guide rail to accommodate the sensor body (see...). Figure 7 Regardless of the installation structure, during assembly, the positioning fixture is first secured to the outer wall of the pipe using stainless steel cable ties. The spacing between the two positioning seats matches the length of the guide rail. Then, the connecting blocks at both ends of the guide rail are aligned with the positioning bolts. After the positioning bolts pass through the connecting holes on the connecting blocks, they are locked in place by positioning nuts. The mounting positioning box is pre-connected to the top cover. The positioning screw on the mounting positioning box passes through the guide groove of the top cover and is then positioned by locking nuts (the position of the mounting positioning box is pre-adjusted according to the scale lines based on the installation position of the sensor body). The sensor body is placed in the accommodating cavity of the mounting positioning box. Then, the top cover with the sensor body is installed on the outside of the guide rail. The positioning bolts pass through the connecting holes I at both ends of the top cover and are locked in place by wing nuts. The mounting positioning box is embedded inside the guide rail. The end face of the sensor body rests against the outer wall of the pipe. The cable on the side wall of the sensor body passes through the space between the connecting blocks and the top cover and is connected to the external host.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning fixture for an externally clamped ultrasonic flow sensor, characterized by: The utility model provides a kind of sensor positioning device, including left-right symmetrical positioning seat (1), guide rail (3) being arranged between the positioning seat (1), upper cover (4) being arranged above the guide rail (3), the positioning box (5) for accommodating sensor body (6) is slidably installed in the guide rail (3), the upper cover (4) is connected to the positioning box (5), the positioning seat (1) is bound and positioned on the outer wall of pipeline (7) by stainless steel strap (8); Positioning bolt (2) is vertically provided on the upper part of the positioning seat (1) for connecting the connecting block (31) at both ends of the guide rail (3) and the upper cover (4); The upper cover (4) is processed with a guide groove (42) along the length direction in the middle part, the upper edge of the guide groove (42) is provided with a scale line (43), the positioning screw rod (53) is fixedly arranged at the center of the upper part of the positioning box (5), and the positioning screw rod (53) is locked and positioned by the locking nut (54) after being matched through the guide groove (42).

2. A positioning fixture for an externally clamped ultrasonic flow sensor according to claim 1, characterized in that: The positioning seat (1) includes a pair of positioning plates (11) and a connecting plate (12) arranged between the positioning plates (11), the positioning bolt (2) is arranged in the middle part of the connecting plate (12), the lower parts of the positioning plates (11) are spaced and positioned by shaft sleeves (13) and connected and fixed by bolt connecting pieces (14), and the shaft sleeves (13) form a through slot (15) for the stainless steel strap (8) to pass through.

3. A positioning fixture for an externally clamped ultrasonic flow sensor according to claim 2, characterized in that: The upper part of the positioning plate (11) is processed with a slot (111), and the connecting plate (12) extends into the slot (111) on both sides.

4. A positioning fixture for an externally clamped ultrasonic flow sensor according to claim 1, characterized in that: The positioning bolt (2) is locked by a positioning nut (21) after passing through the connecting block (31), the connecting block (31) is processed with a connecting hole (32) in the middle part, the positioning bolt (2) is locked by a butterfly nut (22) after passing through the upper cover (4) again, and the upper cover (4) is processed with a connecting hole I (41) at both ends.

5. A positioning fixture for an externally clamped ultrasonic flow sensor according to claim 1, characterized in that: The upper part of the positioning box (5) and both sides of the positioning screw rod (53) are provided with guide blocks (52), and the guide blocks (52) extend into the guide groove (42).

6. A positioning fixture for an externally clamped ultrasonic flow sensor according to claim 1, characterized in that: The lower part of the installation positioning box (5) is opened and formed with an accommodation cavity (51), the sensor body (6) is placed in the accommodation cavity (51), and the cable (61) on the side wall of the sensor body (6) is pulled out between the connecting block (31) and the upper cover (4).

Images