Clamp for measuring pressure of small-diameter pipeline

Abstract

The utility model relates to the field of pressure measurement of small-diameter pipelines, and discloses a clamp for pressure measurement of small-diameter pipelines, which comprises an upper base and a lower base which are connected through a connecting assembly. The connecting assembly comprises guide rods fixedly connected to the left side and the right side of the lower portion of the upper base, and linear bearings are arranged on the outer sides of the guide rods and fixedly connected to the inner wall of the lower base in a penetrating mode. According to the ultrasonic transducer, by using the screw rod, the clamping nut, the guide rod and the linear bearing, the distance between the ultrasonic transducer and the small-diameter pipeline can be conveniently adjusted according to the actual situation of the small-diameter pipeline, so that the arc groove of the wedge block can be better attached to the cambered surface pipe wall of the small-diameter pipeline, the contact area is increased, and the coupling effect between the ultrasonic transducer and the pipe wall is improved; and meanwhile, the external clamping type structure is directly attached to the outer wall of the pipeline, and the integrity of the pipeline does not need to be damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to small pipe diameter pipeline pressure measurement field especially relates to a clamp for small pipe diameter pipeline pressure measurement. BACKGROUND

[0002] Non-invasive ultrasonic technology is a pipeline pressure detection method based on the speed change. Its core principle is to measure the time required for ultrasonic wave propagation in the fluid in the pipeline for a certain distance, combined with the known propagation distance, the propagation speed of ultrasonic wave is calculated, and the pressure of the fluid is obtained according to the relationship between the propagation speed and the pressure. This technology does not need to destroy or intervene the pipeline, has the advantages of non-invasiveness, simple operation, etc., and is widely used in the field of pipeline pressure measurement.

[0003] The contact wall end of the small pipe diameter pipeline is arc and the contact area is small, and the contact surface of the ultrasonic transducer is plane. When the ultrasonic transducer is used to measure the pressure of the small pipe diameter pipeline, the ultrasonic transducer is difficult to closely adhere to the wall of the small pipe diameter pipeline due to the mismatch of the contact surfaces. This will cause energy loss of the sound wave in the transmission process, affect the reliable transmission and reception of the sound wave, and further reduce the measurement accuracy. Therefore, a clamp for small pipe diameter pipeline pressure measurement is proposed to solve the above problems. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides a clamp for small pipe diameter pipeline pressure measurement, aims at improving the prior art "ultrasonic transducer and small pipe diameter pipeline wall contact surface mismatch, resulting in sound wave transmission energy loss, measurement accuracy reduction" problem.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a clamp for small pipe diameter pipeline pressure measurement, including upper base and lower base, the upper base and lower base are connected through connecting assembly,

[0006] The connecting assembly includes guide rod fixedly connected to the left and right sides of the lower part of the upper base, linear bearings are arranged on the outer side of the guide rod, the linear bearings penetrate and are fixedly connected to the inner wall of the lower base, the outer side of the guide rod close to the upper base is fixedly connected with screw rod, the screw rod penetrates the lower base, the lower part of the screw rod close to the lower base is threadedly connected with clamping nut, the upper part of the upper base and the lower part of the lower base are both provided with mounting groove, the inner wall of the mounting groove is provided with wedge, the inner wall of the mounting groove is inserted with mounting seat, the outer side of the mounting seat penetrates and is fixedly connected with insertion cylinder for ultrasonic transducer installation.

[0007] Further description of the above technical scheme:

[0008] The inner wall of the mounting base is provided with a limiting assembly, the limiting assembly comprises an insertion plate, the insertion plate is slidingly connected to the inner wall of the mounting base, the upper base is provided with an insertion slot in the inner wall close to the outer side of the mounting base, the insertion plate is inserted into the inner wall of the insertion slot, the outer side of the mounting base is provided with a sliding slot, and an operation plate is slidingly connected to the inner wall of the sliding slot, and the lower part of the operation plate is fixedly connected to the outer side of the insertion plate.

[0009] As a further description of the above technical scheme:

[0010] The limiting assembly further comprises a positioning rod, the positioning rod is horizontally fixedly connected to the inner wall of the mounting base, the positioning rod is slidingly connected to the inner wall of the insertion plate, and the insertion plate and the mounting base are elastically connected through a spring.

[0011] As a further description of the above technical scheme:

[0012] The spring is sleeved outside the positioning rod.

[0013] As a further description of the above technical scheme:

[0014] The operation plate is provided in an L shape.

[0015] As a further description of the above technical scheme:

[0016] The limiting assembly is symmetrically arranged with the center line of the mounting base.

[0017] As a further description of the above technical scheme:

[0018] The outer side of the wedge block is provided with an arc slot.

[0019] As a further description of the above technical scheme:

[0020] The outer side of the operation plate is provided with a baffle, and the baffle is attached to the outer side of the mounting base.

[0021] The utility model has the advantages of the following beneficial effects:

[0022] 1、The utility model discloses a wedge block and a mounting base, the wedge block is provided with an arc slot, the arc slot is provided with a plurality of arc grooves, the arc groove is provided with a spring, the spring is provided with a spring sleeve, the spring sleeve is provided with a straight line bearing, the straight line bearing is provided with a guide rod, the guide rod is provided with a clamping nut, the clamping nut is provided with a screw rod, the screw rod is provided with an operation plate, the operation plate is provided with a baffle, the baffle is attached to the outer side of the mounting base.

[0023] 2、The utility model discloses a wedge block and a mounting base, the wedge block is provided with an arc slot, the arc slot is provided with a plurality of arc grooves, the arc groove is provided with a spring, the spring is provided with a spring sleeve, the spring sleeve is provided with a straight line bearing, the straight line bearing is provided with a guide rod, the guide rod is provided with a clamping nut, the clamping nut is provided with a screw rod, the screw rod is provided with an operation plate, the operation plate is provided with a baffle, the baffle is attached to the outer side of the mounting base. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;

[0025] Figure 2 This is a bottom-view three-dimensional structural diagram of the overall device in this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the mounting groove and wedge block in this utility model;

[0027] Figure 4 This is a three-dimensional structural diagram of the limiting component in this utility model.

[0028] Legend:

[0029] 1. Upper base; 2. Lower base; 3. Connecting assembly; 31. Guide rod; 32. Linear bearing; 33. Screw; 34. Clamping nut; 35. Mounting slot; 36. Wedge block; 37. Mounting seat; 38. Insert cylinder; 4. Limiting assembly; 41. Insert plate; 42. Operating plate; 43. Slot; 44. Sliding groove; 45. Positioning rod; 46. Spring. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] Reference Figure 1 - Figure 3The utility model provides a kind of clamp for small pipe diameter pipeline pressure measurement: one embodiment provided by the utility model: a kind of clamp for small pipe diameter pipeline pressure measurement, including upper base 1 and lower base 2, upper base 1 and lower base 2 are set in the pipeline both sides needing measurement, provide mounting position for connecting component 3, upper base 1 and lower base 2 are connected by connecting component 3;Connecting component 3 includes the guide rod 31 of fixed connection in the left and right sides of upper base 1 lower part, linear bearing 32 is provided on the outer side of guide rod 31, linear bearing 32 is fixedly connected in the inner wall of lower base 2, and guide rod 31 provides orientation for the relative movement of upper base 1 and lower base 2, and linear bearing 32 reduces the friction when the relative movement of both, so that upper base 1 and lower base 2 move stably and smoothly, to adapt to the small pipe diameter pipeline of different pipe diameter, the outer side of upper base 1 close to guide rod 31 is fixedly connected with screw rod 33, and screw rod 33 penetrates lower base 2, and screw rod 33 is threadedly connected with clamping nut 34 close to the lower part of lower base 2, the distance between upper base 1 and lower base 2 can be adjusted by rotating clamping nut 34, and then the arc groove of wedge block 36 installed on upper base 1 and lower base 2 is better adapted to the arc surface pipe wall of small pipe diameter pipeline, to ensure that ultrasonic transducer is in close contact with pipe wall, optimize sound wave transmission effect, improve measurement accuracy, and the self-locking effect produced by the threaded connection of clamping nut 34 and screw rod 33 can effectively prevent the nut from loosening under external force.

[0032] Refer to Figure 1 - Figure 3 The upper part of upper base 1 and the lower part of lower base 2 are both provided with mounting groove 35 for accurate positioning and installation of wedge block 36, the inner wall of mounting groove 35 is provided with wedge block 36, the outer side of wedge block 36 is provided with arc groove, and wedge block 36 is in contact and extrusion on the outer side of pipeline through the arc groove, the contact pipe wall end of small pipe diameter pipeline is arc surface and has small contact area, the side of wedge block 36 close to insertion cylinder 38 is provided as a plane, and the contact surface of ultrasonic transducer is also a plane, to improve the coupling effect between ultrasonic transducer and pipe wall, reduce energy loss in sound wave transmission process, ensure measurement accuracy, and at the same time, a plurality of wedge blocks 36 with different shapes of arc grooves are prepared to adapt to small pipe diameter pipelines of different pipe diameters, and the outer clamping structure is directly adapted to the outer wall of pipeline without damaging the integrity of pipeline, the inner wall of mounting groove 35 is inserted with mounting seat 37 for closing mounting groove 35 and fixing insertion cylinder 38, and insertion cylinder 38 for ultrasonic transducer installation is fixedly connected through the outer side of mounting seat 37, ultrasonic transducer is a device for converting electromagnetic energy into mechanical sound energy, usually made of piezoelectric ceramic or other magnetostrictive material, such as HM18-20 ultrasonic transducer, by measuring the time required for ultrasonic wave to propagate a certain distance in the fluid in pipeline, combining the known propagation distance, calculating the propagation velocity of ultrasonic wave, and then obtaining the pressure of fluid according to the relationship between propagation velocity and pressure.

[0033] Refer to Figure 2 - Figure 4The inner wall of the mounting seat 37 is provided with a limiting assembly 4, the limiting assembly 4 comprises an insertion plate 41 which is slidingly connected to the inner wall of the mounting seat 37, the upper base 1 is provided with an insertion slot 43 in the inner wall close to the outer side of the mounting seat 37, the insertion plate 41 is inserted into the inner wall of the insertion slot 43, when the insertion plate 41 is inserted into the insertion slot 43, the mounting seat 37 can be effectively limited, preventing the mounting seat 37 from shifting during use, ensuring the stability of the position of the ultrasonic transducer, thereby ensuring the accuracy of the measurement results, the outer side of the mounting seat 37 is provided with a sliding groove 44, the sliding groove 44 is slidingly connected with an operation plate 42, the operation plate 42 is fixedly connected to the outer side of the insertion plate 41, the operation plate 42 is provided in an L shape, facilitating the operation of the operator, by pulling the operation plate 42, the insertion plate 41 can be slidingly connected to the insertion slot 43, achieving the insertion and disconnection of the insertion plate 41 and the insertion slot 43, facilitating the disassembly and assembly of the mounting seat 37 and the replacement of the wedge block 36.

[0034] With reference to Figure 2 - Figure 4 The limiting assembly 4 further comprises a positioning rod 45, the positioning rod 45 provides stable guidance for the sliding of the insertion plate 41, ensuring the stability of the sliding of the insertion plate 41, the positioning rod 45 is horizontally fixedly connected to the inner wall of the mounting seat 37, the positioning rod 45 is slidingly connected to the inner wall of the insertion plate 41, the insertion plate 41 and the mounting seat 37 are elastically connected through a spring 46, the spring 46 endows the insertion plate 41 with elasticity, when subjected to external impact or slight shaking, the elastic effect of the spring 46 can maintain the insertion state of the insertion plate 41 and the insertion slot 43, the spring 46 is sleeved outside the positioning rod 45, the spring 46 is limited on the positioning rod 45 and cannot shift or shake, thereby ensuring the stable sliding of the insertion plate 41 along the predetermined direction, the limiting assembly 4 is symmetrically arranged with the center line of the mounting seat 37, the outer side of the operation plate 42 is provided with a baffle, the baffle is attached to the outer side of the mounting seat 37, the baffle is used for shielding the sliding groove 44, preventing impurities from entering.

[0035] Working principle: in use, the upper base 1 and the lower base 2 are respectively placed on both sides of the pipeline, the upper base 1 and the lower base 2 can be relatively smoothly moved through the cooperation of the guide rod 31 and the linear bearing 32, the distance between the upper base 1 and the lower base 2 is adjusted by rotating the clamping nut 34, the arc groove of the wedge block 36 is closely attached to the arc surface of the pipeline wall, the contact area between the ultrasonic transducer and the pipeline wall is increased, and the coupling effect is improved.

[0036] According to the pipe diameter of the small-diameter pipeline, the wedge block 36 with a suitable arc groove is selected, the ultrasonic transducer is installed on the insertion cylinder 38 of the mounting seat 37, the mounting seat 37 is first inserted into the mounting slot 35 of the upper base 1 and the lower base 2 by pulling the operation plate 42, the operation plate 42 is loosened, the insertion plate 41 is slidingly connected to the insertion slot 43 of the upper base 1 under the elastic force of the spring 46, the fixing of the mounting seat 37 is realized, preventing the displacement of the mounting seat 37 during measurement, and ensuring the stability of the position of the ultrasonic transducer.

[0037] The upper base 1 and the lower base 2 are respectively placed on both sides of the pipeline, and the upper base 1 and the lower base 2 can be relatively smoothly moved through the cooperation of the guide rod 31 and the linear bearing 32. The distance between the upper base 1 and the lower base 2 is adjusted through the rotating clamping nut 34, the arc groove of the wedge block 36 is tightly fitted with the arc surface of the pipeline wall, and the plane of the wedge block 36 is in contact with the plane of the ultrasonic transducer, so that the contact area between the ultrasonic transducer and the pipeline wall is increased, and the coupling effect is improved.

[0038] When the pressure of a pipeline with a different diameter needs to be measured, the operating plate 42 is pulled to make the plug plate 41 disengage from the plug groove 43, the mounting seat 37 is taken out of the mounting groove 35, the wedge block 36 with an appropriate diameter is replaced, the mounting seat 37 is reinstalled, the distance between the upper base 1 and the lower base 2 is adjusted again, the arc groove of the new wedge block 36 is fitted with the wall of the new pipeline, and the pressure of the new pipeline can be measured.

Claims

1. A clamp for pressure measurement of small diameter pipes comprising an upper base (1) and a lower base (2), characterized in that: The upper base (1) and the lower base (2) are connected through a connecting assembly (3); The connecting assembly (3) comprises guide rods (31) fixedly connected to the left and right sides of the lower part of the upper base (1), linear bearings (32) provided on the outer sides of the guide rods (31), the linear bearings (32) penetrating through the inner walls of the lower base (2), screw rods (33) fixedly connected to the outer sides of the guide rods (31) of the upper base (1), the screw rods (33) penetrating through the lower base (2), clamping nuts (34) threadedly connected to the lower parts of the screw rods (33) close to the lower base (2), mounting grooves (35) formed in the upper part of the upper base (1) and the lower part of the lower base (2), wedge blocks (36) provided on the inner walls of the mounting grooves (35), and mounting seats (37) inserted into the inner walls of the mounting grooves (35), the mounting seats (37) penetrating through and being fixedly connected to insertion cylinders (38) for mounting ultrasonic transducers on the outer sides of the mounting seats (37).

2. A clamp for pressure measurement of small diameter pipes according to claim 1, characterized in that: Limiting assemblies (4) are provided on the inner walls of the mounting seats (37), the limiting assemblies (4) comprise insertion plates (41) slidingly connected to the inner walls of the mounting seats (37), insertion grooves (43) formed in the inner walls of the mounting seats (37) close to the outer sides of the upper base (1), the insertion plates (41) being inserted into the inner walls of the insertion grooves (43), sliding grooves (44) formed in the outer sides of the mounting seats (37), and operation plates (42) slidingly connected to the inner walls of the sliding grooves (44), the operation plates (42) being fixedly connected to the outer sides of the insertion plates (41).

3. A clamp for pressure measurement of small diameter pipes according to claim 2, characterized in that: The limiting assemblies (4) further comprise positioning rods (45) horizontally fixedly connected to the inner walls of the mounting seats (37), the positioning rods (45) being slidingly connected to the inner walls of the insertion plates (41), and the insertion plates (41) and the mounting seats (37) being elastically connected through springs (46).

4. A fixture for pressure measurement of small diameter pipes according to claim 3, characterized in that: The springs (46) are sleeved on the outer sides of the positioning rods (45).

5. A fixture for pressure measurement of small diameter pipes as claimed in claim 2, wherein: The operation plates (42) are provided in L shapes.

6. A fixture for pressure measurement of small diameter pipes as claimed in claim 2, wherein: The limiting assemblies (4) are symmetrically arranged with the center lines of the mounting seats (37).

7. A fixture for pressure measurement of small diameter pipes as claimed in claim 1, wherein: Arc grooves are formed in the outer sides of the wedge blocks (36).

8. A fixture for pressure measurement of small diameter pipes as claimed in claim 2, wherein: Baffles are provided on the outer sides of the operation plates (42) and attached to the outer sides of the mounting seats (37).

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