Ultrasonic gas meter shell positioning clamp, conveying device and using method of conveying device

Abstract

The invention relates to an ultrasonic gas meter shell positioning clamp, a conveying device and a using method of the conveying device. The ultrasonic gas meter shell positioning clamp comprises a tray frame. The tray frame comprises four tray corner fittings and a bearing tray; the four tray corner fittings are connected with the bearing tray in an inserted mode to form a tray frame. The bearing tray is positioned in the middle of the four tray corner fittings; four positioning seats are fixedly arranged at the top of the bearing tray; a containing cavity groove used for containing a shell is formed among the four positioning bases. The ultrasonic gas meter shell positioning clamp is simple in structure, the shell of a gas meter can be conveniently positioned through the ultrasonic gas meter shell positioning clamp, the machining and production efficiency of the shell is improved, the conveying device can achieve streamlined operation of the assembly procedure through mutual cooperation and synergistic effect with the conveying device, and therefore the assembly efficiency is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic gas meter accessories, and in particular relates to an ultrasonic gas meter housing positioning fixture, a conveying device and a method for using the conveying device. Background Art

[0002] Ultrasonic gas meter is a new generation of intelligent electronic metering equipment. It uses the difference in the upstream and downstream flight time of ultrasonic waves in the medium for measurement. It has the advantages of high accuracy, high reliability, high safety, wide range ratio, good durability and compact size. It can be widely used in gas metering for residential users, industrial and commercial users. Ultrasonic gas meter can be customized with temperature and pressure compensation function, which can effectively solve the metering loss caused by temperature and pressure changes in traditional mechanical gas meters.

[0003] The shell of the ultrasonic gas meter is the main sealing component of the ultrasonic gas meter. Usually, the front and rear steel shell assembly process of the ultrasonic gas meter and the static curing of the semi-finished product glue are both carried manually. The product is prone to sliding of the shell during transportation, resulting in quality risks. The employees have high labor intensity and are prone to fatigue. The manpower investment cost is high and the consistency is poor.

[0004] At the same time, in the existing ultrasonic gas meter manufacturing process, the delivery device of the ultrasonic gas meter shell has low delivery stability and safety, complex operation and low efficiency; moreover, the delivery accuracy needs to be improved, which brings inconvenience to use.

[0005] In view of the above problems, it is necessary to improve them. Summary of the invention

[0006] The object of the present invention is to provide an ultrasonic gas meter housing positioning fixture, a conveying device and a method for using the conveying device which have simple structure, ingenious design, high degree of automation and precise positioning.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is: an ultrasonic gas meter shell positioning fixture, including a tray frame; the tray frame includes four tray corner pieces and a carrying tray; the four tray corner pieces are connected to the carrying tray by plug-in to form a tray frame; the carrying tray is located in the middle of the four tray corner pieces; four positioning seats are fixed on the top of the carrying tray; a cavity groove for placing the shell is formed between the four positioning seats.

[0008] As a preferred solution of the present invention, the load-bearing tray is embedded in the middle of four tray corner pieces.

[0009] As a preferred solution of the present invention, four positioning seats are circumferentially arranged on the carrying tray, and a spacing is left between adjacent positioning seats.

[0010] As a preferred solution of the present invention, a positioning block is fixedly provided on the inner side of the positioning seat close to the cavity groove, and a limiting groove is formed between the positioning block and the positioning seat.

[0011] As a preferred solution of the present invention, the height of the positioning seat is greater than the height of the positioning block.

[0012] As a preferred solution of the present invention, the positioning seat has a guide surface close to the top of the cavity groove, which gradually expands along the insertion direction of the shell.

[0013] The conveying device comprises a conveying frame and a conveying motor; the conveying frame is equipped with a conveying chain, the conveying motor drives the conveying chain to rotate, and the conveying chain is equipped with an ultrasonic gas meter shell positioning fixture.

[0014] As a preferred solution of the present invention, it also includes a limiting mechanism for positioning the ultrasonic gas meter housing positioning fixture on the conveying frame.

[0015] As a preferred solution of the present invention, the limiting mechanism includes a mounting plate assembled on the bottom of the conveying frame, a driving cylinder fixed to the bottom of the mounting plate, a driving shaft of the driving cylinder passes through the mounting plate to connect to a push plate, wherein the push plate is located on the inner side of the conveying frame, and the top of the push plate abuts against the bottom of two longitudinally arranged pallet corner pieces.

[0016] As a preferred solution of the present invention, two connecting plates are fixedly provided on the outer side of the mounting plate, and a limiting vertical plate is vertically fixed on the connecting plate. A limiting plate is vertically fixed on the limiting vertical plate. The limiting plate is located at the upper end of the pallet frame and has a spacing from the outer side of the positioning seat.

[0017] As a preferred solution of the present invention, a limiting block is fixedly provided at the front end of the bottom of the limiting plate, and the limiting block is attached to the carrying tray.

[0018] As a preferred solution of the present invention, the height of the limit block is consistent with the height of the load-bearing pallet from the top of the pallet corner piece.

[0019] As a preferred solution of the present invention, two limiting vertical plates are arranged in a staggered manner.

[0020] As a preferred solution of the present invention, a guide mechanism is installed between the mounting plate and the push plate; the guide mechanism includes at least one guide cylinder and a guide rod; the guide cylinder is fixed to the bottom of the mounting plate, one end of the guide rod is fixed to the bottom of the push plate, and the other end of the guide rod passes through and extends outside the guide cylinder.

[0021] The method for using the conveying device comprises the following steps: Step 1: First, start the driving cylinder to drive the push plate to move upward so that the push plate is close to the two longitudinally arranged tray corner pieces, so as to limit the ultrasonic gas meter housing positioning fixture on the conveying frame to prevent the ultrasonic gas meter housing positioning fixture from falling off the conveying frame; Step 2: Secondly, the outer shell is clamped and placed on the ultrasonic gas meter outer shell positioning fixture by a manipulator, and the conveying motor is started to drive the conveying chain to rotate, so that the outer shell moves at a uniform speed; Step 3: When the ultrasonic gas meter housing positioning fixture moves to the processing position at a constant speed, the conveying motor is turned off. At this time, the conveying chain stops rotating, and the manipulator can assemble the housing; Step 4: After the shell assembly operation is completed, the ultrasonic gas meter shell positioning fixture is driven to move to the next position area to be processed under the action of the conveying motor and the conveying chain.

[0022] The beneficial effects of the present invention are: 1. The present invention has a simple structure, and the ultrasonic gas meter shell positioning fixture can easily position the shell of the gas meter and improve the processing and production efficiency of the shell: through mutual cooperation and synergy with the conveying device, the conveying device can realize the streamlining of the assembly process, thereby significantly improving the assembly efficiency.

[0023] 2. The ultrasonic gas meter housing positioning fixture provided by the present invention can also reduce production costs: due to the improvement of production efficiency, more housing assembly work can be completed per unit time, thereby reducing the production cost of each product. In addition, the optimized ultrasonic gas meter housing positioning fixture design and parallel conveying device also help to reduce equipment waiting time and human resource waste, further reducing production costs.

[0024] 3. The present invention improves the flexibility and applicability of the conveying device: the conveying device can convey ultrasonic gas meter shells of different structures and models, and can be flexibly selected according to the assembly requirements of different products to meet various conveying needs. This flexibility enables the conveying device to adapt to products of different models and specifications, improving the applicability and flexibility of the conveying device.

[0025] 4. The present invention optimizes the spatial layout: the positioning fixture and the conveying device are cleverly designed, and the design takes into account the effective use of space. The conveying device provides space for the installation of other auxiliary facilities such as pipelines, sensors, etc., which is conducive to a more compact and reasonable overall layout of the conveying device.

[0026] 5. The present invention realizes automated operation: the conveying device realizes highly automated operation through an integrated control system and automated equipment, reduces dependence on manual operation, and improves production efficiency and stability.

[0027] 6. The present invention improves the safety and stability of transportation. By setting a limit mechanism, the ultrasonic gas meter housing positioning fixture is positioned on the conveying frame to prevent the ultrasonic gas meter housing positioning fixture from falling from the conveying frame. The entire conveying and processing process is logically controlled and coordinated, ensuring the accuracy and consistency of the conveying and processing actions and guaranteeing product quality. At the same time, the precise coordination of the limit mechanism and the conveying frame can also ensure the accuracy and stability of assembly.

[0028] In summary, the cooperation between the ultrasonic gas meter housing positioning fixture and the conveying device realizes efficient, high-quality and low-cost assembly operations through innovative design and optimized process flow, which is of great significance for improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a positioning fixture for an ultrasonic gas meter housing according to an embodiment of the present invention; Figure 2 This is a diagram showing the use status of the ultrasonic gas meter housing positioning fixture according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection structure between the ultrasonic gas meter housing positioning fixture and the limiting mechanism according to an embodiment of the present invention; Figure 4 It is a connection side view of the limiting mechanism of an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a limiting mechanism according to an embodiment of the present invention; Figure 6 This is a diagram showing the use status of the limiting mechanism according to an embodiment of the present invention; Figure 7 This is a diagram showing the use status of the ultrasonic gas meter housing positioning fixture on the conveying device according to an embodiment of the present invention; Figure 8 It is a side view of the ultrasonic gas meter housing positioning fixture on the conveying device according to an embodiment of the present invention; The reference numerals in the figure are: pallet frame 1, positioning seat 2, positioning block 3, limiting groove 4, conveying frame 5, limiting mechanism 6, guiding mechanism 9, pallet corner piece 10, carrying pallet 11, cavity groove 20, guide surface 21, conveying chain 50, conveying motor 51, mounting plate 60, driving cylinder 61, driving shaft 62, push plate 63, connecting plate 64, limiting vertical plate 65, limiting plate 66, limiting block 67, guide cylinder 90, guide rod 91, shell 100, ultrasonic gas meter shell positioning fixture 200. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example: like Figure 1-2 As shown, Figure 1 This is a schematic diagram of the structure of a positioning fixture for an ultrasonic gas meter housing according to an embodiment of the present invention; Figure 2 This is a diagram showing the use status of the ultrasonic gas meter housing positioning fixture according to an embodiment of the present invention.

[0033] The ultrasonic gas meter housing positioning fixture comprises a tray frame 1; the tray frame 1 comprises four tray corner pieces 10 and a carrying tray 11; the four tray corner pieces 10 are connected with the carrying tray 11 by plugging to form the tray frame 1; the carrying tray 11 is located in the middle of the four tray corner pieces 10; four positioning seats 2 are fixedly arranged on the top of the carrying tray 11; a cavity groove 20 for placing the housing 100 is formed between the four positioning seats 2; The present invention has a simple structure, and the ultrasonic gas meter shell positioning fixture can easily position the shell of the gas meter, thereby improving the processing and production efficiency of the shell. By cooperating and cooperating with the conveying device, the conveying device can realize the streamlined operation of the assembly process, thereby significantly improving the assembly efficiency.

[0034] The carrying tray 11 is embedded in the middle of the four tray corner pieces 10 ; the four positioning seats 2 are circumferentially arranged on the carrying tray 11 , so that the center of gravity of the four positioning seats 2 is lower, and the center of gravity after the shell 100 is placed is more stable.

[0035] There is a spacing between adjacent positioning seats 2; the set spacing facilitates the placement and movement of the housing 100 by the manipulator, provides convenience for the subsequent processing of the gas meter, and thus improves the processing efficiency.

[0036] The inner surface shape of the positioning seat 2 matches the outer shell 100, ensuring the stability and accuracy of the device.

[0037] A positioning block 3 is fixedly provided on the inner side of the positioning seat 2 near the cavity groove 20, and a limiting groove 4 is formed between the positioning block 3 and the positioning seat 2; the limiting groove 4 is provided to clamp the shell 10 to prevent the shell 10 from shaking and play a role in positioning the shell 10.

[0038] The height of the positioning seat 2 is greater than the height of the positioning block 3; when the shell 10 is assembled in the limiting groove 4, the positioning block 3 is used to abut the shell 10 to support the shell 10, thereby ensuring the stability and safety of the shell 10 during transportation and processing.

[0039] The top of the positioning seat 2 near the cavity groove 20 has a guide surface 21 that gradually expands along the insertion direction of the shell 100; the provided guide surface 21 facilitates the assembly of the shell 100 into the cavity groove 20, thereby improving the assembly efficiency of the shell 100.

[0040] like Figure 7-8 As shown, Figure 7 This is a diagram showing the use status of the ultrasonic gas meter housing positioning fixture on the conveying device according to an embodiment of the present invention; Figure 8 It is a side view of the ultrasonic gas meter housing positioning fixture on the conveying device according to an embodiment of the present invention.

[0041] The conveying device includes a conveying frame 5 and a conveying motor 51; a conveying chain 50 is installed on the conveying frame 5, and the conveying motor 51 drives the conveying chain 50 to rotate, and an ultrasonic gas meter shell positioning fixture 200 is installed on the conveying chain 50; in this embodiment, a plurality of ultrasonic gas meter shell positioning fixtures 200 can be provided, which are equidistantly arranged on the conveying frame 5, and can realize comprehensive and continuous conveying and processing functions, ensuring the continuous operation of the production line.

[0042] The ultrasonic gas meter housing positioning fixture provided by the present invention can also reduce production costs: due to the improvement of production efficiency, more housing assembly work can be completed per unit time, thereby reducing the production cost of each product. In addition, the optimized ultrasonic gas meter housing positioning fixture design and parallel conveying device also help to reduce equipment waiting time and human resource waste, further reducing production costs.

[0043] The present invention optimizes the spatial layout: the positioning fixture and the conveying device are cleverly designed, the design takes effective use of space into consideration, and the conveying device provides space for the installation of other auxiliary facilities such as pipelines, sensors, etc., which is conducive to a more compact and reasonable overall layout of the conveying device.

[0044] The conveying chain 50 in this embodiment is a double-speed chain. The conveying chain 50 used for material conveying is similar to the chain used in chain transmission. The commonly used conveying chain is a roller chain. On the conveying frame 5, the moving speed of the conveying chain 50 remains unchanged, but the ultrasonic gas meter housing positioning fixture 200 and the housing 100 being conveyed above the conveying chain 50 can control the moving speed according to the operator's requirements, stop moving at the required position, and the operator performs various assembly operations. After completing the above operations, the housing 100 continues to move forward for transportation.

[0045] In this embodiment, the conveying frame 5 uses a specially made surface-treated extruded aluminum alloy profile as a guide rail, so that the conveying chain 50 is assembled in the guide rail. The conveying device has very good stability and durability during the conveying process, and is suitable for large-scale continuous conveying of products. When the outer shell 100 is stopped during operation, there is rolling friction between the chain roller and the conveyed object, which greatly reduces the wear and operation resistance of the chain; when one or more outer shells 100 are stopped, it does not affect the conveying of other conveyed objects, and the conveying efficiency is relatively high.

[0046] The conveyor chain 50 uses rollers on both sides to bear the load and the middle roller to carry the load. The rollers are separated from the conveyor rollers to make the conveyor run more stably. Because the chain is basically wrapped in the aluminum body, only the roller protrudes about 2mm, which effectively prevents large foreign objects from being drawn into the chain. The overall appearance is more beautiful and relatively safe.

[0047] like Figure 3-6 As shown, Figure 3 This is a schematic diagram of the connection structure between the ultrasonic gas meter housing positioning fixture and the limiting mechanism according to an embodiment of the present invention; Figure 4 It is a connection side view of the limiting mechanism of an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a limiting mechanism according to an embodiment of the present invention; Figure 6 This is a usage status diagram of the limiting mechanism of an embodiment of the present invention.

[0048] The conveying device also includes a limiting mechanism 6 for positioning the ultrasonic gas meter housing positioning fixture 200 on the conveying frame 5; specifically, the limiting mechanism 6 includes a mounting plate 60 assembled on the bottom of the conveying frame 5, a driving cylinder 61 fixed to the bottom of the mounting plate 60, and a driving shaft 62 of the driving cylinder 61 passes through the mounting plate 60 to connect to a push plate 63, wherein the push plate 63 is located on the inner side of the conveying frame 5, and the top of the push plate 63 is against the bottom of two longitudinally arranged pallet corner pieces 10.

[0049] By setting the limiting mechanism 6, the ultrasonic gas meter shell is prevented from tipping over when moving on the conveying chain 50. The limiting mechanism 6 plays an auxiliary clamping role on the ultrasonic gas meter shell, thereby improving the stability of the ultrasonic gas meter shell transportation.

[0050] The present invention improves the safety and stability of transportation. By setting a limit mechanism, the ultrasonic gas meter housing positioning fixture is positioned on the conveying frame to prevent the ultrasonic gas meter housing positioning fixture from falling from the conveying frame. The entire conveying and processing process is logically controlled and coordinated, ensuring the accuracy and consistency of the conveying and processing actions and guaranteeing product quality. At the same time, the precise coordination of the limit mechanism and the conveying frame can also ensure the accuracy and stability of assembly.

[0051] Two connecting plates 64 are fixedly provided on the outer side of the mounting plate 60, a limiting vertical plate 65 is vertically fixedly provided on the connecting plate 64, a limiting plate 66 is vertically fixedly provided on the limiting vertical plate 65, the limiting plate 66 is located at the upper end of the tray frame 1, leaving a distance from the outer side of the positioning seat 2, a limiting block 67 is fixedly provided at the front end of the bottom of the limiting plate 66, and the limiting block 67 is attached to the carrying tray 11.

[0052] By adopting the above technical solution, the contact area between the limit block 67 and the carrying pallet 11 is increased, thereby ensuring safety in use. At the same time, the height of the limit block 67 is consistent with the height of the carrying pallet 11 from the top of the pallet corner piece 10; when the limit block 67 is attached to the carrying pallet 11, the limit plate 66 is attached to the top of the pallet corner piece 10, so that the limit plate 66 and the limit block 67 can contact the pallet corner piece 10 and the carrying pallet 11 at the same time, thereby improving safety in use.

[0053] The two limiting upright plates 65 are arranged in a staggered manner, so that the force for positioning the tray frame 1 is more balanced, and it can be ensured that the ultrasonic gas meter housing positioning fixture will not change direction during transportation, making it more convenient to use.

[0054] A guide mechanism 9 is installed between the mounting plate 60 and the push plate 63; the guide mechanism 9 includes at least one guide cylinder 90 and a guide rod 91; the guide cylinder 90 is fixed to the bottom of the mounting plate 60, one end of the guide rod 91 is fixed to the bottom of the push plate 63, and the other end of the guide rod 91 passes through and extends to the outside of the guide cylinder 90.

[0055] Through the setting of the guide mechanism 9, the push plate 63 is driven to move upward by starting the driving cylinder 61, so that the push plate 63 is close to the position of the two longitudinally arranged tray corner pieces 10, which is used to limit the ultrasonic gas meter shell positioning fixture 200 on the conveying rack 5, so that the driving shaft 62 and the guide rod 91 of the driving cylinder 61 limit the bottom of the ultrasonic gas meter shell, and at the same time, together with the limiting block 67 of the limiting mechanism 6, fix the two sides and the bottom of the ultrasonic gas meter shell positioning fixture together, thereby ensuring the stability of the shell during processing.

[0056] The method for using the conveying device comprises the following steps: Step 1: First, the driving cylinder 61 is started to drive the push plate 63 to move upward, so that the push plate 63 is close to the two longitudinally arranged tray corner pieces 10, so as to limit the ultrasonic gas meter housing positioning fixture 200 on the conveying rack 5 to prevent the ultrasonic gas meter housing positioning fixture 200 from falling off the conveying rack 5; Step 2: Secondly, the housing 100 is clamped and placed on the ultrasonic gas meter housing positioning fixture 200 by a manipulator, and the conveying motor 51 is started to drive the conveying chain 50 to rotate, thereby making the housing 100 move at a constant speed; Step 3: When the ultrasonic gas meter housing positioning fixture 200 moves to the position to be processed at a constant speed, the conveying motor 51 is turned off. At this time, the conveying chain 50 stops rotating, and the manipulator can assemble the housing 100; Step 4: After the housing 100 assembly operation is completed, the ultrasonic gas meter housing positioning fixture 200 is driven again by the conveying motor 51 and the conveying chain 50 to move to the next position area to be processed.

[0057] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0058] Although the present invention uses more reference numerals in the figures: tray frame 1, positioning seat 2, positioning block 3, limiting groove 4, conveying frame 5, limiting mechanism 6, guiding mechanism 9, tray corner piece 10, carrying tray 11, cavity groove 20, guiding surface 21, conveying chain 50, conveying motor 51, mounting plate 60, driving cylinder 61, driving shaft 62, pushing plate 63, connecting plate 64, limiting vertical plate 65, limiting plate 66, limiting block 67, guiding cylinder 90, guiding rod 91, housing 100, ultrasonic gas meter housing positioning fixture 200, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. Ultrasonic gas meter housing positioning fixture, Features: The invention comprises a pallet frame (1); the pallet frame (1) comprises four pallet corner pieces (10) and a carrying pallet (11); the four pallet corner pieces (10) and the carrying pallet (11) are connected by plugging to form a pallet frame (1); the carrying pallet (11) is located in the middle of the four pallet corner pieces (10); four positioning seats (2) are fixedly arranged on the top of the carrying pallet (11); a cavity groove (20) for placing an outer shell (100) is formed between the four positioning seats (2); the carrying pallet (11) is embedded in the middle of the four pallet corner pieces (10); the four positioning seats (2) are circumferentially arranged on the carrying pallet (11), and a spacing is left between adjacent positioning seats (2); a positioning block (3) is fixedly arranged on the inner side of the positioning seat (2) close to the cavity groove (20), and a limiting groove (4) is formed between the positioning block (3) and the positioning seat (2).

2. The ultrasonic gas meter housing positioning fixture according to claim 1, Features: The height of the positioning seat (2) is greater than the height of the positioning block (3).

3. The ultrasonic gas meter housing positioning fixture according to claim 1 or 2, Features: The top of the positioning seat (2) close to the cavity groove (20) has a guide surface (21) that gradually expands along the insertion direction of the shell (100).

4. Conveying device, It is characterized in that The invention comprises a conveying frame (5) and a conveying motor (51); a conveying chain (50) is mounted on the conveying frame (5); the conveying motor (51) drives the conveying chain (50) to rotate; an ultrasonic gas meter shell positioning fixture (200) is mounted on the conveying chain (50); the ultrasonic gas meter shell positioning fixture (200) is the ultrasonic gas meter shell positioning fixture according to any one of claims 1 to 3.

5. The conveying device according to claim 4, Features: It also includes a limiting mechanism (6) for positioning the ultrasonic gas meter housing positioning fixture (200) on the conveying frame (5); the limiting mechanism (6) includes a mounting plate (60) mounted on the bottom of the conveying frame (5), a driving cylinder (61) fixedly mounted on the bottom of the mounting plate (60), a driving shaft (62) of the driving cylinder (61) passing through the mounting plate (60) to connect to a push plate (63), wherein the push plate (63) is located on the inner side of the conveying frame (5), and the top of the push plate (63) abuts against the bottom of two tray corner pieces (10) arranged longitudinally.

6. The conveying device according to claim 5, Features: Two connecting plates (64) are fixedly provided on the outer side of the mounting plate (60), a limiting vertical plate (65) is vertically fixedly provided on the connecting plate (64), a limiting plate (66) is vertically fixedly provided on the limiting vertical plate (65), and the limiting plate (66) is located at the upper end of the tray frame (1) and is spaced apart from the outer side of the positioning seat (2).

7. The conveying device according to claim 6, Features: A limiting block (67) is fixedly provided at the front end of the bottom of the limiting plate (66), and the limiting block (67) is attached to the carrying tray (11).

8. The conveying device according to claim 7, Features: The height of the limiting block (67) is consistent with the height of the load-bearing tray (11) from the top of the tray corner piece (10); and the two limiting vertical plates (65) are arranged in a staggered manner.

9. The conveying device according to claim 5, Features: A guide mechanism (9) is installed between the mounting plate (60) and the push plate (63); the guide mechanism (9) comprises at least one guide cylinder (90) and a guide rod (91); the guide cylinder (90) is fixedly arranged at the bottom of the mounting plate (60), one end of the guide rod (91) is fixedly arranged at the bottom of the push plate (63), and the other end of the guide rod (91) passes through and extends outside the guide cylinder (90).

10. A method for using the conveying device according to claim 9, It is characterized in that The following steps are involved: Step 1: First, the driving cylinder (61) is started to drive the push plate (63) to move upward, so that the push plate (63) is close to the position of two tray corner pieces (10) arranged longitudinally, so as to limit the ultrasonic gas meter housing positioning fixture (200) on the conveying frame (5) to prevent the ultrasonic gas meter housing positioning fixture (200) from falling off the conveying frame (5); Step 2: Secondly, the housing (100) is clamped and placed on the ultrasonic gas meter housing positioning fixture (200) by a manipulator, and the conveying motor (51) is started to drive the conveying chain (50) to rotate, thereby causing the housing (100) to move at a constant speed; Step 3: When the ultrasonic gas meter housing positioning fixture (200) moves at a constant speed to the position to be processed, the conveying motor (51) is turned off. At this time, the conveying chain (50) stops rotating, and the manipulator can assemble the housing (100); Step 4: After the housing (100) assembly operation is completed, the ultrasonic gas meter housing positioning fixture (200) is driven again by the conveying motor (51) and the conveying chain (50) to move to the next position area to be processed.

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