Ultrasonic module installation structure and ultrasonic gas meter

Abstract

An ultrasonic module installation structure relates to the technical field of gas detection devices. The ultrasonic module is arranged in a lower shell through the installation structure. A waist-shaped groove is formed on the lower shell. The two opposite side surfaces of the ultrasonic module are respectively arranged as a first contact surface and a second contact surface. The installation structure includes an outer shielding cover, a pre-positioning component, an elastic limiting component and a connecting structure. The outer shielding cover includes a first U-shaped cover body and a second U-shaped cover body which are symmetrically arranged. The first U-shaped cover body is hinged to the second U-shaped cover body through the connecting structure. The pre-positioning component includes a plurality of parallel abutment rods. The elastic limiting component includes an abutment plate, a telescopic guide structure and a fixed plate. The telescopic guide structure is arranged between the abutment plate and the fixed plate and is elastically connected. In this embodiment, the ultrasonic wave can be detachably installed in the lower shell and has a large force-bearing area and a stable position, which greatly reduces the possibility of the ultrasonic module being skewed and affecting the measurement accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection devices, and in particular to an ultrasonic module installation structure and an ultrasonic gas meter. Background Art

[0002] The gas meter of the prior art is basically a mechanical meter (mechanical diaphragm gas meter), and its counting principle is to use the flow of gas to drive the counting code wheel to rotate for counting. Due to the mechanical rotating structure, there are shortcomings such as a large counting error range (especially inaccurate measurement in low flow areas), a large meter body volume (occupying a large installation space), and aging after a long period of use that reduces the measurement accuracy. With the advancement of technology, a new generation of ultrasonic gas meters (gas volume meters) has now emerged. The reliability and accuracy of the ultrasonic module installation structure are relatively low. For example, a certain existing installation method is a fixed welding method. In detail, two relatively vertically arranged fixing plates are welded on the opposite sides of the ultrasonic module, and the fixing plates are then welded to the inner wall of the gas meter. Since the area at the connection position between the fixing plate and the ultrasonic module is small, the structural stability is poor, and the force is concentrated. When the gas meter is hit by external force, the connection between the fixing plate and the ultrasonic module is easily damaged, resulting in the skewness of the ultrasonic module, which is easy to produce deviations when detecting gas flow, affecting the measurement accuracy. Therefore, there is room for improvement. Summary of the invention

[0003] In view of the shortcomings of the prior art, one of the purposes of the present invention is to propose an ultrasonic module installation structure, in which the ultrasonic wave can be detachably installed in the lower shell and has a large force-bearing area and a stable position, which greatly reduces the possibility of the ultrasonic module being skewed. The specific scheme is as follows:

[0004] An ultrasonic module installation structure, the ultrasonic module is arranged in a lower shell through the installation structure, a waist-shaped groove is formed on the lower shell, the ultrasonic module is flat as a whole, and the two opposite side surfaces of the ultrasonic module are respectively set as a first contact surface and a second contact surface, the installation structure includes an outer shielding cover, a pre-positioning component, an elastic limit component and a connecting structure, the outer shielding cover includes a first U-shaped cover body and a second U-shaped cover body that are symmetrically arranged, the outer shielding cover is waist-shaped as a whole and is adapted to be installed in the waist-shaped groove, the first U-shaped cover body is connected through the connecting structure Hinged with the second U-shaped cover body, the pre-positioning component includes a plurality of parallelly arranged abutment rods, the plurality of abutment rods are evenly arranged on the first U-shaped cover body and the second U-shaped cover body, and one end of the abutment rod is fixedly connected to the inner wall of the outer shielding cover, and the other end of the abutment rod is used for abutting the first contact surface, the elastic limiting component includes an abutment plate, a telescopic guide sliding structure and a fixed plate, the telescopic guide sliding structure is arranged between the abutment plate and the fixed plate and is elastically connected, the abutment plate is used to abut against the second contact surface, and the fixed plate is detachably connected to the connecting structure.

[0005] Furthermore, the connecting structure includes a central positioning tube, a hinge shaft, and a fixed block. Two fixed blocks are provided and are respectively arranged at one end of the first U-shaped cover body and the second U-shaped cover body. Two hinge shafts are provided and are respectively arranged on the side of the fixed block away from the outer shielding cover. The hinge shafts are all connected to the central positioning tube.

[0006] Furthermore, a first guide groove is provided on the side of the fixed plate facing away from the telescopic guide sliding structure, a plug-in rod is detachably and slidably connected in the first guide groove, a guide notch is axially provided in the center positioning tube to form a second guide groove, and the plug-in rod forms a sliding portion adapted to the second guide groove.

[0007] Furthermore, the mounting structure also includes a buffer support structure, and the buffer support structure is arranged at the bottom of the waist-shaped groove.

[0008] Furthermore, the buffer support structure includes a substrate, a support rod and a buffer layer, the substrate is placed on the lower shell, a plurality of support rods are provided, and two ends of the support rods are respectively connected to the buffer layer and the substrate.

[0009] Furthermore, the telescopic guide structure includes a spring and a telescopic rod, and a plurality of the spring and the telescopic rod are provided. The telescopic direction of the spring and the telescopic rod is arranged parallel to the axial direction of the abutment rod.

[0010] Furthermore, the outer shielding cover includes a first shielding layer, a rubber layer and a second shielding layer in sequence.

[0011] Furthermore, the first shielding layer and the second shielding layer are both made of nickel silver or nickel silver.

[0012] Another object of the present invention is to provide an ultrasonic gas meter, the specific scheme of which is as follows:

[0013] An ultrasonic gas meter comprises an upper shell, a lower shell, and an ultrasonic module. The lower shell is provided with an ultrasonic module mounting structure, and the ultrasonic module is mounted in the lower shell through the mounting structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When assembling the ultrasonic module, first close the first U-shaped cover body and the second U-shaped cover body to form a closed ring-shaped outer shielding cover, hold the ultrasonic module so that the first contact surface of the ultrasonic module contacts the surface of the positioning rod in the pre-positioning component, and the ultrasonic module is evenly stressed. Then, place the elastic limiting component between the outer shielding cover and the second contact surface, and the abutment plate abuts against the second contact surface. At the same time, apply force to the fixed plate. Under the guiding action of the telescopic rod, the spring is compressed to a suitable length, and the plug-in rod is correspondingly inserted into the first guide groove and the second guide groove. The fixed plate is released. Under the positioning action of the plug-in rod, the elastic limiting component presses the ultrasonic module through the second contact surface. After assembly, the elastic limiting component and the pre-positioning component jointly fix the ultrasonic module. In summary, the ultrasonic wave can be detachably installed in the lower shell body with a large force area and a stable position, which greatly reduces the possibility of the ultrasonic module being skewed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an overall schematic diagram of an embodiment of the present invention;

[0017] Figure 2 A top view showing the specific structure of the connection structure of the lower shell in the present invention;

[0018] Figure 3 The structural schematic diagram of the present invention shows the specific structure of the telescopic guide structure;

[0019] Figure 4 The schematic diagram of the structure of the buffer support structure of the present invention is shown.

[0020] : Figure numerals: 1. upper shell; 2. lower shell; 3. ultrasonic module; 31. first contact surface; 32. second contact surface; 4. waist-shaped groove; 5. outer shielding cover; 51. first U-shaped cover body; 52. second U-shaped cover body; 53. first shielding layer; 54. rubber layer; 55. second shielding layer; 6. pre-positioning assembly; 61. abutment rod; 7. elastic limit assembly; 71. abutment plate; 72. telescopic guide slide structure; 721. spring; 722. telescopic rod; 73. fixed plate; 8. connecting structure; 81. center positioning tube; 82. hinge shaft; 83. fixed block; 9. first guide slide groove; 10. second guide slide groove; 11. plug-in rod; 12. buffer support structure; 121. substrate; 122. support rod; 123. buffer layer. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0022] Combination Figures 1 to 4 An ultrasonic gas meter includes an upper shell 1, a lower shell 2, and an ultrasonic module 3. In order to make the ultrasonic module 3 detachable and stably assembled, an ultrasonic module 3 mounting structure is provided in the lower shell 2, and the ultrasonic module 3 is installed in the lower shell 2 through the mounting structure.

[0023] As described in detail, both the upper shell 1 and the lower shell 2 are thin-walled structures with a waist-shaped cross-section, so that a waist-shaped groove 4 is formed on the lower shell 2, and the waist-shaped groove 4 is used to place the ultrasonic module 3 and the mounting structure. The upper shell 1 and the lower shell 2 are fixedly connected by screws to form a sealing structure, which protects the internal ultrasonic module 3 and the ultrasonic module 3 mounting structure, and the upper end of the upper shell 1 is respectively provided with an air inlet and an air outlet on both sides, which is convenient for use with the internal ultrasonic module 3. The ultrasonic module 3 is flat as a whole and the opposite sides of the ultrasonic module 3 are respectively set as a first contact surface 31 and a second contact surface 32, and the first contact surface 31 and the second contact surface 32 are used for use with the mounting structure.

[0024] Specifically, the installation structure includes an outer shielding cover 5, a pre-positioning component 6, an elastic limiting component 7 and a connecting structure 8. The outer shielding cover 5 is a thin-walled structure in the shape of a waist as a whole and is adapted to be installed in the waist-shaped groove 4, which protects the ultrasonic module 3 from magnetic field interference. The pre-positioning component 6 cooperates with the first contact surface 31 to pre-limit the position of the ultrasonic module 3, and the elastic limiting component 7 cooperates with the second contact surface 32 to press the ultrasonic module 3 again, so that the ultrasonic module 3 can be detachably installed in the lower shell 2.

[0025] The outer shielding cover 5 includes a first U-shaped cover body 51 and a second U-shaped cover body 52 which are symmetrically arranged. The first U-shaped cover body 51 is hinged to the second U-shaped cover body 52 through a connecting structure 8. In detail, the height of the connecting structure 8 is similar to that of the outer shielding cover 5. The connecting structure 8 includes a central positioning tube 81, a hinge shaft 82, and a fixing block 83. To facilitate the installation of the fixing block 83, the length of one end of the first U-shaped cover body 51 and the second U-shaped cover body 52 is slightly shorter than the length of the other end. Two fixing blocks 83 are provided and are fixedly connected to the first U-shaped cover body 51 and the second U-shaped cover body 52, respectively. At the shorter end of the first U-shaped cover body 51 and the second U-shaped cover body 52, two hinge shafts 82 are provided and are respectively arranged on the side of the fixed block 83 away from the outer shielding cover 5, and the hinge shafts 82 are connected to the central positioning tube 81, so that the first U-shaped cover body 51 and the second U-shaped cover body 52 are hinged to the central positioning tube 81 through the hinge shafts 82, and the first U-shaped cover body 51 and the second U-shaped cover body 52 can be relatively opened or closed with the central positioning tube 81 as the rotation center, so as to facilitate the replacement of the damaged first U-shaped cover body 51 or the second U-shaped cover body 52.

[0026] The pre-positioning assembly 6 includes a plurality of parallel abutment rods 61, which are evenly arranged on the first U-shaped cover body 51 and the second U-shaped cover body 52, and are arranged away from the connection structure 8. One end of the abutment rod 61 is fixedly connected to the inner wall of the outer shielding cover 5, and the other end of the abutment rod 61 is used to abut the first contact surface 31. In order to increase the contact area with the first contact surface 31, the abutment rod 61 is a T-shaped round rod structure as a whole, and a rubber anti-slip layer is bonded to the end of the abutment rod 61 with a larger outer diameter to increase the friction with the first contact surface 31, so that the pre-positioning assembly 6 can stably abut the ultrasonic module 3.

[0027] The elastic limiting assembly 7 includes an abutment plate 71, a telescopic guide sliding structure 72 and a fixed plate 73. The telescopic guide sliding structure 72 is arranged between the abutment plate 71 and the fixed plate 73. The telescopic guide sliding structure 72 includes a spring 721 and a telescopic rod 722. There are multiple springs 721 and telescopic rods 722. The telescopic directions of the springs 721 and the telescopic rods 722 are arranged parallel to the axial direction of the abutment rod 61. The two ends of the spring 721 are fixedly connected to the abutment plate 71 and the fixed plate 73 respectively. The fixed end and the free end of the telescopic rod 722 are fixedly connected to the abutment plate 71 and the fixed plate 73 respectively. When the spring 721 is compressed, under the guiding action of the telescopic rod 722, the abutment plate 71 and the fixed plate 73 approach each other, so as to adjust the length of the entire elastic limiting assembly 7 along the telescopic direction of the spring 721.

[0028] The abutting plate 71 is used for abutting against the second contact surface 32 . The abutting plate 71 is made of a metal material with relatively high strength, such as iron or stainless steel. The area of ​​the abutting plate 71 is slightly smaller than the area of ​​the second contact surface 32 . To facilitate placing the elastic limit assembly 7 into the waist-shaped groove 4, the fixed plate 73 is detachably connected to the connecting structure 8, and a first guide slot 9 is provided on the side of the fixed plate 73 away from the telescopic guide slot 72. The first guide slot 9 is vertically arranged, and the cross-section of the first guide slot 9 is arc-shaped or dovetail-shaped. A plug-in rod 11 is detachably and slidably connected in the first guide slot 9. The length of the plug-in rod 11 is higher than the height of the first guide slot 9, and a large plate-like structure is formed in the middle of the plug-in rod 11 to facilitate uniform force. A guide notch is provided in the axial direction of the center positioning tube 81 to form a second guide slot 10, and the plug-in rod 11 forms a sliding portion adapted to the second guide slot 10, and the sliding portion can be slidably inserted in the second guide slot 10, thereby realizing a detachable and fixed connection between the fixed plate 73 and the connecting structure 8.

[0029] When assembling the ultrasonic module 3, the first contact surface 31 of the ultrasonic module 3 is in contact with the surface of the positioning rod in the pre-positioning component 6, the ultrasonic module 3 is in the middle position, and the ultrasonic module 3 is evenly stressed. Then, the elastic limiting component 7 is placed between the outer shielding cover 5 and the second contact surface 32, and the abutment plate 71 abuts against the second contact surface 32. At the same time, force is applied to the fixing plate 73 so that the spring 721 is compressed to an appropriate length, and the plug-in rod 11 is correspondingly inserted into the first guide groove 9 and the second guide groove 10. After assembly, the elastic limiting component 7 and the pre-positioning component 6 jointly complete the fixing of the ultrasonic module 3.

[0030] Optimally, the installation structure also includes a buffer support structure 12, which is arranged at the bottom of the waist-shaped groove 4. The buffer support structure 12 includes a substrate 121, a support rod 122 and a buffer layer 123. The substrate 121 is placed on the lower shell 2, and a plurality of support rods 122 are provided, and the two ends of the support rods 122 are respectively fixedly connected to the buffer layer 123 and the substrate 121. The buffer layer 123 is made of sponge or rubber. During the installation process, if the ultrasonic module 3 is accidentally dropped, the buffer layer 123 plays a protective role in reducing the impact force.

[0031] To achieve anti-interference effect, the outer shielding cover 5 includes a first shielding layer 53, a rubber layer 54 and a second shielding layer 55. The first shielding layer 53 and the second shielding layer 55 are both made of nickel silver or nickel silver to shield the influence of external electromagnetic waves on the internal ultrasonic module 3.

[0032] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An ultrasonic module installation structure, wherein the ultrasonic module (3) is arranged in a lower shell (2) through the installation structure, a waist-shaped groove (4) is formed on the lower shell (2), the ultrasonic module (3) is flat as a whole, and two opposite side surfaces of the ultrasonic module (3) are respectively arranged as a first contact surface (31) and a second contact surface (32), characterized in that: The mounting structure comprises an outer shielding cover (5), a pre-positioning component (6), an elastic limiting component (7) and a connecting structure (8); the outer shielding cover (5) comprises a first U-shaped cover body (51) and a second U-shaped cover body (52) which are symmetrically arranged; the outer shielding cover (5) is in a waist shape as a whole and is adapted to be installed in the waist-shaped groove (4); the first U-shaped cover body (51) is hingedly connected to the second U-shaped cover body (52) via the connecting structure (8); the pre-positioning component (6) comprises a plurality of parallel abutment rods (61); the plurality of abutment rods (61) are evenly arranged on the first U-shaped cover body ( 51), on the second U-shaped cover body (52), and one end of the abutment rod (61) is fixedly connected to the inner wall of the outer shielding cover (5), and the other end of the abutment rod (61) is used to abut against the first contact surface (31), the elastic limiting assembly (7) comprises an abutment plate (71), a telescopic guide slide structure (72) and a fixed plate (73), the telescopic guide slide structure (72) is arranged between the abutment plate (71) and the fixed plate (73) and is elastically connected, the abutment plate (71) is used to abut against the second contact surface (32), and the fixed plate (73) is detachably connected to the connection structure (8); The connection structure (8) comprises a central positioning tube (81), a hinge shaft (82), and a fixed block (83); two fixed blocks (83) are provided and are respectively arranged at one end of the first U-shaped cover body (51) and the second U-shaped cover body (52); two hinge shafts (82) are provided and are respectively arranged at a side of the fixed block (83) away from the outer shielding cover (5); and the hinge shafts (82) are connected to the central positioning tube (81); The mounting structure further comprises a buffer support structure (12), wherein the buffer support structure (12) is arranged at the bottom of the waist-shaped groove (4).

2. The ultrasonic module installation structure according to claim 1, characterized in that: A first guide slide groove (9) is provided on the side of the fixed plate (73) facing away from the telescopic guide slide structure (72), and a plug-in rod (11) is detachably and slidably connected in the first guide slide groove (9). A guide notch is provided in the axial direction of the central positioning tube (81) to form a second guide slide groove (10), and the plug-in rod (11) forms a sliding portion adapted to the second guide slide groove (10).

3. The ultrasonic module installation structure according to claim 1, characterized in that: The buffer support structure (12) comprises a base plate (121), a support rod (122) and a buffer layer (123); the base plate (121) is placed on the lower shell (2); a plurality of support rods (122) are provided, and two ends of the support rods (122) are respectively connected to the buffer layer (123) and the base plate (121).

4. The ultrasonic module installation structure according to claim 1, characterized in that: The telescopic guide structure (72) comprises a spring (721) and a telescopic rod (722), a plurality of the spring (721) and the telescopic rod (722) are provided, and the telescopic directions of the spring (721) and the telescopic rod (722) are arranged parallel to the axial direction of the abutment rod (61).

5. The ultrasonic module installation structure according to claim 1, characterized in that: The outer shielding cover (5) comprises in sequence a first shielding layer (53), a rubber layer (54) and a second shielding layer (55).

6. The ultrasonic module installation structure according to claim 5, characterized in that: The first shielding layer (53) and the second shielding layer (55) are both made of nickel silver or nickel silver.

7. An ultrasonic gas meter, comprising an upper shell (1), a lower shell (2), and an ultrasonic module (3), characterized in that: The lower shell (2) is provided with an ultrasonic module mounting structure according to any one of claims 1 to 6, and the ultrasonic module (3) is mounted in the lower shell (2) via the mounting structure.

Images