Vacuum pressure retaining valve and production process thereof

Abstract

The invention provides a vacuum pressure retaining valve and a production process thereof, belongs to the technical field of valve body production, and solves the technical problems that an existing vacuum pressure retaining valve is poor in sealing performance, easy to generate howling, low in production automation degree and the like. The vacuum pressure retaining valve comprises a valve body upper shell and a valve body lower shell, the valve body upper shell is arranged on the valve body lower shell in a sleeved mode, a flexible diaphragm is arranged in an inner space formed by the valve body upper shell and the valve body lower shell, the flexible diaphragm abuts against the valve body upper shell and the valve body lower shell respectively, and a welding gasket is arranged between the outer side of the valve body upper shell and the outer side of the valve body lower shell. The production process comprises the following steps: placing an order; producing the valve body; assembling and welding; airtight testing; and fully inspecting the product. Batch production of the vacuum pressure retaining valves can be carried out through sequential discharging, sequential clamping and assembling, valve body welding, product overturning and vibration detection output, the vacuum pressure retaining valves are stable in structure and good in sealing performance, howling is avoided, the automation degree of the production process is high, the production efficiency is high, and the product yield is good.

Description

Technical Field

[0001] The invention belongs to the technical field of valve body production, and relates to a vacuum pressure-maintaining valve, in particular to a vacuum pressure-maintaining valve and a production process thereof. Background Art

[0002] In the field of fluid control, the performance and quality of valves are crucial to the stable operation of the system. Traditional vacuum pressure-maintaining valves have some shortcomings in practical applications. The existing vacuum pressure-maintaining valve product structure will resonate through the gas. When the resonance reaches a certain frequency, the internal valve core structure will vibrate and produce a harsh whistling sound, which greatly affects the customer's use and experience. In addition, the production process of some vacuum pressure-maintaining valves is relatively complicated, the degree of automation is low, and the production efficiency is low, which makes it difficult to meet the needs of large-scale industrial production.

[0003] Therefore, we propose a vacuum pressure-maintaining valve and its production process, which can perform batch assembly, welding and product detection output of the vacuum pressure-maintaining valve through automated operations such as sequenced discharge, sequential clamping assembly, valve body welding, product flipping and vibration detection output. The vacuum pressure-maintaining valve has a stable structure and good sealing performance, can operate stably under different working conditions, does not generate howling, has a high degree of automation in the production process, high production efficiency and good product yield. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a vacuum pressure-maintaining valve and a production process thereof. The technical problem to be solved by the invention is: how to achieve batch production of vacuum pressure-maintaining valves with stable structure and good sealing performance through sequenced discharge, sequential clamping and assembly, valve body welding, product flipping and vibration detection output.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A vacuum pressure-maintaining valve comprises a valve body upper shell and a valve body lower shell, wherein the valve body upper shell is sleeved on the valve body lower shell, a flexible diaphragm is arranged in the internal space formed by the valve body upper shell and the valve body lower shell, the flexible diaphragm respectively contacts the valve body upper shell and the valve body lower shell, and a welding gasket is arranged between the outer side of the valve body upper shell and the outer side of the valve body lower shell.

[0006] The working principle of the present invention is: when gas is introduced from the lower shell of the valve body, the gas pushes the flexible diaphragm to be squeezed on the upper shell of the valve body, and the flexible diaphragm fits tightly against the upper shell of the valve body to block the passage of gas; when gas is introduced from the upper shell of the valve body and reaches a certain pressure, the gas pushes the flexible diaphragm to squeeze the lower shell of the valve body, and the flexible diaphragm is slightly deformed and leaves the upper shell of the valve body and is no longer in the upper shell of the valve body, and the gas passes through the gap between the flexible diaphragm and the upper shell of the valve body. After the gas is no longer introduced, the flexible diaphragm pushes the welding gasket back to its initial position.

[0007] The valve body upper shell comprises an upper shell body and an upper shell air pipe. The upper shell body is located below the upper shell air pipe. A wedge-shaped sleeve pipe is arranged on the upper shell body. The interior of the wedge-shaped sleeve pipe is communicated with the upper shell air pipe.

[0008] With the above structure, the wedge-shaped sleeve pipe is used to be sleeved in the lower shell of the valve body, and its wedge shape facilitates sleeved fitting.

[0009] The valve body lower shell includes a lower shell body and a lower shell air pipe, the lower shell air pipe is located below the lower shell body, a fitting groove is provided in the lower shell body, the shape and size of the fitting groove match the wedge-shaped fitting pipe, an air duct, a support seat and a plurality of limit columns evenly distributed in a circle are provided in the lower shell body, the support seat is located in the middle position of the plurality of limit columns, the air duct is located between the plurality of limit columns and the fitting groove, a plurality of air holes are provided below the support seat, the air holes are all connected with the air duct, and the air holes are all connected with the lower shell air pipe.

[0010] With the above structure, the fitting groove is used to fit the wedge-shaped fitting tube, which is convenient for assembly and increases the sealing performance. The air duct is used for ventilation and blows evenly to the flexible diaphragm to ensure smooth passage of gas. The support seat is used to support the flexible diaphragm and limit the stroke of the flexible diaphragm to reduce the whistling when the gas passes through. A number of limit columns are used to fix the flexible diaphragm.

[0011] The flexible diaphragm is arranged on the support seat, the top of the flexible diaphragm abuts against the inner top of the upper shell body, the flexible diaphragm is in an inverted skirt shape, and the top of the flexible diaphragm is made of elastic plastic.

[0012] With the above structure, when gas passes through, the flexible diaphragm controls the opening and closing of the valve through slight deformation of the top end.

[0013] The welding gasket is arranged between the outer sides of the lower shell body and the upper shell body, and the welding gasket is made of welding plastic.

[0014] With the above structure, the welding gasket is used to connect the lower shell body and the upper shell body, which facilitates welding sealing and enhances sealing performance.

[0015] A production process of a vacuum pressure-maintaining valve, the production process steps are as follows: Step 1: Place an order; the production order is issued and the production volume is set according to the order quantity; Step 2: valve body production: vulcanization production of flexible diaphragm and welding gasket, injection molding production of shell; Step three, assembling and welding: assembling the produced shell, flexible diaphragm and welding gasket to form a vacuum pressure-maintaining valve, and welding the assembled valve body shell; Step 4: Air tightness test: Check air tightness to ensure that it meets the design requirements; Step 5: Full product inspection: For products that pass the air tightness test, we will conduct appearance inspection and size inspection, and the qualified products will be packaged and shipped.

[0016] The equipment used for assembly and welding in step 3 includes a frame, a conveyor, a vibrating guide plate, a driving motor 1 and a rotating table. The frame is provided with an inclined mounting groove, and a bottom plate is provided at the end of the mounting groove. The vibrating guide plate is tiltedly arranged in the mounting groove. The conveyor is located below the vibrating guide plate, and the conveying direction of the conveyor is parallel to the conveying direction of the vibrating guide plate. The output shaft of the driving motor 1 is connected to the input shaft of the conveyor by transmission. The rotating table is arranged in the middle position of the upper end of the frame. The frame is provided with four moving mechanisms, four vibrating plates, a welding mechanism, four guide plates, and a plurality of guide plates. The discharging mechanism, four moving mechanisms, four vibrating disks, a welding mechanism, a vibrating guide plate and four guide discharging mechanisms are all located outside the rotating table, and the moving mechanisms and the vibrating disks are alternately arranged, the positions of the four moving mechanisms, the welding mechanism and the vibrating guide plates are distributed in a circle, and the four moving mechanisms are respectively provided with a shell clamping mechanism 1, a vertical clamping mechanism 1, a vertical clamping mechanism 2 and a shell clamping mechanism 2, the discharge port ends of the four vibrating disks are fixedly connected to the guide discharging mechanism, and a number of circumferentially evenly distributed flipping clamping mechanisms are hinged on the rotating table.

[0017] With the above structure, the staff will place the valve body lower shell, valve body upper shell, flexible diaphragm and welding gasket in the corresponding positions of the vibration plate, and then the vibration plate will convey the components inside to the guide discharge mechanism at the corresponding position. The guide discharge mechanism will discharge the materials in sequence, and the output shaft of the driving motor will drive the conveyor to move and convey the finished products. The shell clamping mechanism 1 moves under the drive of the moving mechanism at the corresponding position, clamps the five valve body lower shells on the guide discharge mechanism at the corresponding position, and after the clamping is completed, the guide discharge mechanism at the corresponding position moves to discharge the five new valve body lower shells in sequence, and at the same time, the shell clamping mechanism 1 drives the five valve body lower shells to move to the top of the flip clamping mechanism on the rotating table, and continues to move to place the five valve body lower shells on the flip clamping mechanism, and after completing the clamping and placement, returns to the top of the corresponding guide discharge mechanism, waiting for the next clamping of the valve body lower shell, and at the same time, the rotating table rotates to drive the flip clamping mechanism and the five valve body lower shells thereon to move to the position of the vertical clamping mechanism 1, and the rotating table stops moving. At this time, a flip clamping mechanism moves to the position of the shell clamping mechanism 1, and repeats the clamping action of the shell clamping mechanism 1; The vertical clamping mechanism 1 moves under the drive of the moving mechanism at the corresponding position, clamps the five flexible diaphragms on the guide discharge mechanism at the corresponding position, and after the clamping is completed, the guide discharge mechanism at the corresponding position moves to discharge the five new flexible diaphragms in sequence, and at the same time, the vertical clamping mechanism 1 drives the five flexible diaphragms to move to the top of the flip clamping mechanism where the valve body lower shell has been placed, and installs the five flexible diaphragms in the corresponding valve body lower shell, and after the installation and placement is completed, it returns to the top of the corresponding guide discharge mechanism, waiting for the next clamping and installation of the flexible diaphragm, and at the same time, the rotating table rotates to drive the flip clamping mechanism to move to the position of the vertical clamping mechanism 2, and the rotating table stops moving. At this time, a flip clamping mechanism moves to the position of the vertical clamping mechanism 1, and repeats the clamping action of the vertical clamping mechanism 1; The second vertical clamping mechanism moves under the drive of the moving mechanism at the corresponding position, and the second vertical clamping mechanism clamps the five welding gaskets on the guide discharge mechanism at the corresponding position. After the clamping is completed, the guide discharge mechanism at the corresponding position moves to discharge the five new welding gaskets in sequence. At the same time, the second vertical clamping mechanism drives the five welding gaskets to move to the top of the flip clamping mechanism where the flexible diaphragm has been installed, and installs the five welding gaskets on the corresponding lower shell of the valve body. After the installation and placement are completed, it returns to the top of the corresponding guide discharge mechanism, waiting for the next clamping and installation of the welding gasket. At the same time, the rotating table rotates to drive the flip clamping mechanism to move to the position of the second shell clamping mechanism, and the rotating table stops moving. At this time, a flip clamping mechanism moves to the position of the second vertical clamping mechanism, and repeats the clamping action of the second vertical clamping mechanism. The second shell clamping mechanism moves under the drive of the moving mechanism at the corresponding position, clamps the five valve body upper shells on the guide discharge mechanism at the corresponding position, and after the clamping is completed, the guide discharge mechanism at the corresponding position moves to discharge the five new valve body upper shells in sequence, and at the same time, the second shell clamping mechanism drives the five valve body upper shells to move to the top of the flip clamping mechanism where the welding gasket has been installed, and continues to move to install the five valve body upper shells on the valve body lower shell, and after the installation is completed, returns to the top of the corresponding guide discharge mechanism, waiting for the next clamping of the valve body upper shell, and at the same time, the rotating table rotates to drive the flip clamping mechanism and the assembled valve body thereon to move to the position of the welding mechanism, and the rotating table stops moving. At this time, a flip clamping mechanism moves to the position of the second shell clamping mechanism, and repeats the clamping action of the second shell clamping mechanism; The welding mechanism moves to the top of the assembled valve body and welds the valve body together, then returns to the initial position and waits for the next welding. At the same time, the rotating table rotates to drive the flip clamping mechanism and the welded valve body to the position of the vibrating guide plate. The rotating table stops moving. At this time, a flip clamping mechanism moves to the position of the welding mechanism and repeats the welding action of the welding mechanism. Then the flip clamping mechanism moves, and the flip clamping mechanism flips a certain angle, and the welded valve body thereon leaves the flip clamping mechanism and falls on the vibrating guide plate, and after being vibrated and detected by the vibrating guide plate, falls on the conveyor and is transported out; The rotating platform is provided with a supporting plate, and a plurality of turning openings and a plurality of blocking grooves are opened on the outer side of the upper end of the supporting plate, and the blocking grooves are located on the inner side of the turning openings at corresponding positions. The supporting plate is provided with a plurality of wedge-shaped guide plates, and the wedge-shaped guide plates are located on the sides of the turning openings at corresponding positions. The wedge-shaped guide plates are fan-shaped, and the fan shape is hollow.

[0018] With the above structure, the flip opening and the blocking groove are used to install the flip clamping mechanism, and the wedge-shaped guide plate is used to release the flip clamping mechanism from clamping the valve body when the flip clamping mechanism flips.

[0019] The flip clamping mechanism includes a flip plate, an electric push rod, a clamping seat and two symmetrically arranged return springs. The electric push rod is fixed on the frame. The flip plate is hinged in the flip opening of the supporting plate. A limit baffle is provided at the end of the flip plate. The limit baffle matches the size of the blocking groove. A triangular lifting plate is provided in the middle position below the flip plate. One end of the two return springs is fixed below the flip plate, and the two return springs are respectively located on both sides of the lifting plate. The other ends of the two return springs are fixed below the supporting plate. The clamping seat is arranged at the upper end of the flip plate. The clamping seat is provided with five evenly spaced fixed seats, and the clamping seat is provided with five evenly spaced sliding seats. Both the sliding seat and the fixed seat are provided with semicircular clamping openings, and a clamping hole is formed between two corresponding positions, and clamping springs are provided between the side of the sliding seat and the clamping seat. Two symmetrically arranged pull rods are provided between the five sliding seats, and the two pull rods are respectively located at both ends of the sliding seat, and the ends of the two pull rods extend out of the ends of the clamping seat, and a pull plate is provided between the ends of the two pull rods, and a stretching opening is formed between the pull plate, the end of the clamping seat and the two pull rods.

[0020] With the above structure, when the lower shell of the valve body is clamped, the lower shell of the valve body pushes the sliding seat to move, and the sliding seat pushes the clamping spring. After the lower shell of the valve body enters, it is clamped between the sliding seat and the fixed seat under the action of the clamping spring; The telescopic end of the electric push rod 1 pushes the lifting plate, and the lifting plate pushes the flip plate and the clamping seat thereon to flip. During the flipping process, the pull plate moves away from the clamping seat along the wedge-shaped guide plate at the corresponding position. During movement, the pull plate pulls the two pull rods to move, and the two pull rods pull the five sliding seats to slide and squeeze the clamping springs, thereby loosening the clamping of the welded valve body. After the flipping is completed, the telescopic end of the electric push rod 1 returns to the initial position, and the flip plate returns to the initial position under the action of two reset springs, and the limit baffle is used to block the flip plate.

[0021] The guide discharge mechanism comprises a support rod and a support frame, both of which are fixed on the frame, a guide rod is arranged at the upper end of the support rod, the end of the guide rod is connected to the discharge port of the vibration plate at the corresponding position, a feeding trough is provided on the guide rod, two symmetrically arranged limit guide plates 1 are arranged on the guide rod, the two limit guide plates 1 are both located in the feeding trough, a discharge plate is arranged on one side of the upper end of the support frame, five equidistant and evenly distributed discharge ports are arranged on the upper end of the discharge plate, a U-shaped limit guide plate 2 is arranged at the lower end of the discharge plate, and five equidistant and evenly distributed push ports are arranged on one side of the limit guide plate 2. The end of the limiting guide plate 2 is connected to the limiting guide plate 1, and the position and size of the pushing port correspond to the discharge port. An electric push rod 3 is fixed on the other side of the upper end of the support frame, and a pushing plate is provided on the telescopic end of the electric push rod 3, and five equidistant and evenly distributed pushing blocks are provided on the pushing plate, and the pushing blocks correspond to the position and size of the pushing port, and the lower end surface of the pushing block is higher than the upper end surface of the limiting guide plate 2. An electric push rod 2 is fixed under the support frame, and a top plate is fixed on the telescopic end of the electric push rod 2, and five equidistant and evenly distributed top blocks are provided on the top plate, and the top blocks correspond to the position and size of the discharge port.

[0022] With the above structure, the vibration plate transports the valve body components to the guide rod, enters the feeding trough, and is guided by the limit guide plate 1 to the limit guide plate 2. The valve body components are arranged on the limit guide plate 2, and then the telescopic end of the electric push rod 3 drives the push plate to move, and the push plate drives the five push blocks thereon to move, and the five push blocks push the five valve body components to move toward the discharge ports at corresponding positions. When pushing in, the end faces of the push blocks do not enter the discharge ports, and then the telescopic end of the electric push rod 2 drives the ejection plate to move, and the ejection plate drives the five ejection blocks to move, thereby lifting the five valve body components for easy clamping.

[0023] The moving mechanism includes a moving frame, which is fixed on the frame. A moving seat 1 is slidably provided on the upper end of the side of the moving frame. A horizontally arranged electric push rod 4 is fixed on the moving frame. The electric push rod 4 is fixedly connected to the moving seat 1. A moving seat 2 is slidably provided on the moving seat 1. A vertically arranged electric push rod 5 is fixed on the moving seat 1. The telescopic end of the electric push rod 5 is fixedly connected to the moving seat 2.

[0024] With the above structure, the telescopic end of the electric push rod four drives the moving seat one to move and slide on the moving frame, the moving seat one drives the electric push rod five thereon to move, and the telescopic end of the electric push rod five drives the moving seat two to slide on the moving seat one.

[0025] The housing clamping mechanism 1 includes a mounting support plate 1, an electric push rod 6, a fixed plate 1 and a driving motor 2, the mounting support plate 1 is fixed on the moving seat 2 at the corresponding position, the electric push rod 6 is arranged on the mounting support plate 1, the telescopic end of the electric push rod 6 is fixedly connected to the fixed plate 1, the driving motor 2 is fixed to the side of the fixed plate 1, the fixed plate 1 is slidably arranged on the mounting support plate 1, five equidistant and evenly distributed clamping claws 1 are arranged on the fixed plate 1, a transmission shaft 1 is rotatably arranged on the fixed plate 1, the transmission shaft 1 is transmission-connected to the output shaft of the driving motor 2, the transmission shaft 1 is transmission-connected to the five clamping claws 1 respectively, and a clamping claw hole matching the size of the lower shell of the valve body is opened on the clamping claw 1; The second shell clamping mechanism has the same structure as the first shell clamping mechanism.

[0026] With the above structure, the telescopic end of the electric push rod 6 drives the fixed plate 1 to move, the fixed plate 1 drives the five clamping claws 1 to move, the output shaft of the driving motor 2 drives the transmission shaft 1 to move, and the transmission shaft 1 drives the five clamping claws 1 to move, thereby completing the clamping.

[0027] The vertical clamping mechanism 1 includes an installation support plate 2, a driving motor 3, a fixed plate 2 and an electric push rod 7. The installation support plate 2 is fixed on a moving seat 2 at a corresponding position, the electric push rod 7 is fixed on the installation support plate 2, the driving motor 3 is fixed on the side of the fixed plate 2, the fixed plate 2 is slidably arranged on the installation support plate 2, the fixed plate 2 is fixedly connected to the telescopic end of the electric push rod 7, five equidistant and evenly distributed clamping claws 2 are provided on the fixed plate 2, a transmission shaft 2 is rotatably provided on the fixed plate 2, the transmission shaft 2 is transmission-connected to the output shaft of the driving motor 3, and the transmission shaft 2 is transmission-connected to the five clamping claws 2.

[0028] The structure of the second vertical clamping mechanism is the same as that of the first vertical clamping mechanism.

[0029] A plurality of spring connecting rods are arranged between the vibration guide plate and the installation groove, and the end of the vibration guide plate abuts against the bottom plate. A vibration motor is fixed on the vibration guide plate, and a corrugated protrusion is arranged on the upper end of the vibration guide plate.

[0030] With the above structure, the telescopic end of the electric push rod 7 drives the mounting support plate 2 to slide on the fixed plate 2, the mounting support plate 2 drives the five clamping claws 2 to move, the output shaft of the driving motor 3 drives the transmission shaft 2 to move, and the transmission shaft 2 drives the five clamping claws 2 to move, thereby completing the clamping action; The vibration motor drives the vibration guide plate to vibrate, and the welded valve body falling on the vibration guide plate vibrates at the corrugated protrusions on the vibration guide plate, thereby detecting the structural stability of the welded valve body.

[0031] The welding mechanism comprises an electric screw member, which is arranged on a frame, a screw slide is arranged on the electric screw member, a base is fixed on the screw slide, and five ultrasonic welders are evenly distributed at equal distances are arranged on the base.

[0032] With the above structure, the electric screw rod is started, the screw rod slide drives the base and the five ultrasonic welders thereon to move, the welding head contacts the valve body, and then welding begins. Under the action of ultrasonic waves, the lower shell of the valve body, the upper shell of the valve body and the welding gasket are welded together to enhance the sealing effect.

[0033] Compared with the prior art, the vacuum pressure-maintaining valve and its production process have the following advantages: The vacuum pressure-maintaining valve has a stable structure and good sealing performance, and can meet the requirements of stable operation under different working conditions.

[0034] This production process has a high degree of automation, high production efficiency and good product yield. The assembly and welding equipment used in this production process can perform batch assembly, welding and product inspection output of vacuum pressure-maintaining valves through the automated operations of sequenced material arrangement, sequential clamping assembly, valve body welding, product flipping and vibration inspection output.

[0035] The valve body parts are conveyed and discharged in sequence by the cooperation of the vibration plate and the guide discharge mechanism at the corresponding position, which is convenient for clamping and assembly; The moving mechanism cooperates with the shell clamping mechanism 1, the vertical clamping mechanism 1, the shell clamping mechanism 2 and the vertical clamping mechanism 2 respectively to accurately and stably clamp and transport the valve body parts in batches, thereby realizing batch assembly; The welding mechanism cooperates with the flip clamping mechanism to achieve batch welding with high welding efficiency; The clamping mechanism is flipped at a certain angle to loosen the clamping of the welded valve body, and the valve body is automatically output and cooperates with the vibrating material guide plate to achieve preliminary inspection of the welded valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view structural schematic diagram of the vacuum pressure maintaining valve in the present invention.

[0037] Figure 2 It is a schematic diagram of the exploded structure of the vacuum pressure maintaining valve in the present invention.

[0038] Figure 3 It is a schematic diagram of the cross-sectional structure of the upper shell of the valve body in the present invention.

[0039] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower shell of the valve body in the present invention.

[0040] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower shell of the valve body in the present invention.

[0041] Figure 6 It is a three-dimensional structural schematic diagram of the assembly and welding equipment in the present invention.

[0042] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating table in the present invention.

[0043] Figure 8 It is a three-dimensional structural schematic diagram of the flip clamping mechanism in the present invention.

[0044] Fig. 9 It is a three-dimensional structural schematic diagram of the guide and discharge mechanism in the present invention.

[0045] Fig.10 It is a three-dimensional structural schematic diagram of the mobile mechanism in the present invention.

[0046] Fig.11 It is a three-dimensional structural schematic diagram of the shell clamping mechanism 1 in the present invention.

[0047] Fig.12 It is a schematic diagram of the three-dimensional structure of the vertical clamping mechanism 1 in the present invention.

[0048] Fig.13 It is a three-dimensional structural schematic diagram of the welding mechanism in the present invention.

[0049] Fig.14 It is a schematic diagram of the production process of the present invention.

[0050] In the figure, 1, valve body upper shell; 2, valve body lower shell; 3, drive motor 1; 4, welding gasket; 5, flexible diaphragm; 6, wedge-shaped sleeve pipe; 7, upper shell body; 8, upper shell air pipe; 9, support seat; 10, sleeve groove; 11, lower shell body; 12, lower shell air pipe; 13, limit column; 14, vent hole; 15, air duct; 16, frame; 17, vibration plate; 18, guide discharge mechanism; 19, shell clamping mechanism Structure 1; 20, vertical clamping mechanism 1; 21, moving mechanism; 22, flip clamping mechanism; 23, welding mechanism; 24, rotating table; 25, mounting groove; 26, bottom plate; 27, conveyor; 28, supporting plate; 29, wedge-shaped guide plate; 30, flip opening; 31, blocking groove; 32, electric push rod 1; 33, limit baffle; 34, reset spring; 35, clamping seat; 36, pull rod; 37, sliding seat; 38. Fixed seat; 39. Turning plate; 40. Pull plate; 41. Support frame; 42. Support rod; 43. Limiting guide plate 1; 44. Guide rod; 45. Electric push rod 2; 46. Ejector plate; 47. Limiting guide plate 2; 48. Discharge plate; 49. Push plate; 50. Electric push rod 3; 51. Moving frame; 52. Electric push rod 4; 53. Moving seat 1; 54. Electric push rod 5; 55. Moving seat 2; 5 6. Electric push rod six; 57. Mounting support plate one; 58. Fixed plate one; 59. Clamp one; 60. Transmission shaft one; 61. Drive motor two; 62. Electric push rod seven; 63. Mounting support plate two; 64. Drive motor three; 65. Fixed plate two; 66. Transmission shaft two; 67. Clamp two; 68. Electric screw rod; 69. Screw slide; 70. Base; 71. Ultrasonic welder; 72. Vibrating guide plate. DETAILED DESCRIPTION

[0051] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0052] like Figure 1-Figure 5 As shown, the vacuum pressure-maintaining valve comprises a valve body upper shell 1 and a valve body lower shell 2. The valve body upper shell 1 is sleeved on the valve body lower shell 2. A flexible diaphragm 5 is provided in the internal space formed by the valve body upper shell 1 and the valve body lower shell 2. The flexible diaphragm 5 is respectively in contact with the valve body upper shell 1 and the valve body lower shell 2. A welding gasket 4 is provided between the outer side of the valve body upper shell 1 and the outer side of the valve body lower shell 2.

[0053] When gas is introduced from the valve body lower shell 2, the gas pushes the flexible diaphragm 5 to be squeezed on the valve body upper shell 1, and the flexible diaphragm 5 fits tightly against the valve body upper shell 1 to block the passage of gas; when gas is introduced from the valve body upper shell 1 and reaches a certain pressure, the gas pushes the flexible diaphragm 5 to squeeze the valve body lower shell 2, and the flexible diaphragm 5 is slightly deformed and leaves the valve body upper shell 1 and is no longer in the valve body upper shell 1, and the gas passes through the gap between the flexible diaphragm 5 and the valve body upper shell 1. After the gas is no longer introduced, the flexible diaphragm 5 pushes the welding gasket 4 back to its initial position.

[0054] The valve body upper shell 1 includes an upper shell body 7 and an upper shell air pipe 8. The upper shell body 7 is located below the upper shell air pipe 8. A wedge-shaped sleeve pipe 6 is provided on the upper shell body 7. The interior of the wedge-shaped sleeve pipe 6 is connected to the upper shell air pipe 8.

[0055] The wedge-shaped sleeve pipe 6 is used to be sleeved in the lower shell 2 of the valve body, and is wedge-shaped for easy sleeve fitting.

[0056] The valve body lower shell 2 includes a lower shell body 11 and a lower shell air pipe 12. The lower shell air pipe 12 is located below the lower shell body 11. A fitting groove 10 is provided in the lower shell body 11. The shape and size of the fitting groove 10 match the wedge-shaped fitting pipe 6. An air duct 15, a support seat 9 and a plurality of circumferentially evenly distributed limiting columns 13 are provided in the lower shell body 11. The support seat 9 is located in the middle position of the plurality of limiting columns 13. The air duct 15 is located between the plurality of limiting columns 13 and the fitting groove 10. A plurality of air holes 14 are provided below the support seat 9. The air holes 14 are all connected with the air duct 15, and the air holes 14 are all connected with the lower shell air pipe 12.

[0057] The fitting groove 10 is used to fit the wedge-shaped fitting tube 6, which is convenient for assembly and increases the sealing performance. The air duct 15 is used for ventilation and blows evenly toward the flexible diaphragm 5 to ensure smooth passage of gas. The support seat 9 is used to support the flexible diaphragm 5 and limit the stroke of the flexible diaphragm 5 to reduce the whistling when the gas passes through. A number of limit columns 13 are used to fix the flexible diaphragm 5.

[0058] The flexible diaphragm 5 is arranged on the support seat 9, the top of the flexible diaphragm 5 abuts against the inner top of the upper shell body 7, the flexible diaphragm 5 is in an inverted skirt shape, and the top of the flexible diaphragm 5 is made of elastic plastic.

[0059] When the gas passes through, the flexible diaphragm 5 controls the opening and closing of the valve by slightly deforming the top end.

[0060] The welding gasket 4 is arranged between the outer sides of the lower shell body 11 and the upper shell body 7 , and the welding gasket 4 is made of welding plastic.

[0061] The welding gasket 4 is used to connect the lower shell body 11 and the upper shell body 7 to facilitate welding sealing and enhance sealing performance.

[0062] like Figure 6-Figure 14 As shown, the production process of the vacuum pressure maintaining valve, the production process steps are as follows: Step 1: Place an order; the production order is issued and the production volume is set according to the order quantity; Step 2: valve body production: vulcanization production of flexible diaphragm 5 and welding gasket 4, injection molding production of shell; Step three, assembling and welding: assembling the produced housing, flexible diaphragm 5 and welding gasket 4 to form a vacuum pressure-maintaining valve, and welding the assembled valve body shell; Step 4: Air tightness test: Check air tightness to ensure that it meets the design requirements; Step 5: Full product inspection: For products that pass the air tightness test, we will conduct appearance inspection and size inspection, and the qualified products will be packaged and shipped.

[0063] The equipment used for assembly and welding in step three includes a frame 16, a conveyor 27, a vibrating guide plate 72, a drive motor 3 and a rotating table 24. The frame 16 is provided with an inclined mounting groove 25, and a bottom plate 26 is provided at the end of the mounting groove 25. The vibrating guide plate 72 is arranged in the mounting groove 25. The conveyor 27 is located below the vibrating guide plate 72, and the conveying direction of the conveyor 27 is parallel to the conveying direction of the vibrating guide plate 72. The output shaft of the drive motor 3 is connected to the input shaft of the conveyor 27. The rotating table 24 is arranged in the middle position of the upper end of the frame 16. The frame 16 is provided with four moving mechanisms 21, four vibrating plates 17, a welding mechanism 23, and four The guide discharge mechanism 18, four moving mechanisms 21, four vibration disks 17, welding mechanism 23, vibration guide plate 72, and four guide discharge mechanisms 18 are all located on the outside of the rotating table 24, and the moving mechanism 21 and the vibration disk 17 are alternately arranged, the positions of the four moving mechanisms 21, welding mechanism 23 and vibration guide plate 72 are distributed in a circle, and the four moving mechanisms 21 are respectively provided with a shell clamping mechanism 19, a vertical clamping mechanism 1 20, a vertical clamping mechanism 2, and a shell clamping mechanism 2, the discharge port ends of the four vibration disks 17 are fixedly connected to the guide discharge mechanism 18, and a plurality of circumferentially evenly distributed flip clamping mechanisms 22 are hinged on the rotating table 24.

[0064] The staff place the valve body lower shell 2, the valve body upper shell 1, the flexible diaphragm 5 and the welding gasket 4 in the corresponding positions of the vibration plate 17, and then the vibration plate 17 conveys the components therein and enters the guide discharge mechanism 18 in the corresponding position. The guide discharge mechanism 18 discharges the materials in sequence, and the output shaft of the driving motor 3 drives the conveyor 27 to move and transport the materials; The shell clamping mechanism 19 moves under the drive of the moving mechanism 21 at the corresponding position, clamps the five valve body lower shells 2 on the guide discharge mechanism 18 at the corresponding position, and after the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge five new valve body lower shells 2 in sequence, and at the same time, the shell clamping mechanism 19 drives the five valve body lower shells 2 to move to the top of the flip clamping mechanism 22 on the rotating table 24, and continues to move to place the five valve body lower shells 2 on the flip clamping mechanism 22, and after completing the clamping and placement, returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping of the valve body lower shell 2, and at the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 and the five valve body lower shells 2 thereon to move to the position of the vertical clamping mechanism 20, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the shell clamping mechanism 19, and repeats the clamping action of the shell clamping mechanism 19; The vertical clamping mechanism 20 moves under the drive of the moving mechanism 21 at the corresponding position, clamps the five flexible diaphragms 5 on the guide discharge mechanism 18 at the corresponding position, and after the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new flexible diaphragms 5 in sequence, and at the same time, the vertical clamping mechanism 20 drives the five flexible diaphragms 5 to move to the top of the flip clamping mechanism 22 where the valve body lower shell 2 has been placed, and installs the five flexible diaphragms 5 in the corresponding valve body lower shell 2, and after the installation and placement is completed, it returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping and installation of the flexible diaphragm 5, and at the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 to move to the position of the vertical clamping mechanism 2, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the vertical clamping mechanism 20, and the clamping action of the vertical clamping mechanism 20 is repeated; The second vertical clamping mechanism moves under the drive of the moving mechanism 21 at the corresponding position, and the second vertical clamping mechanism clamps the five welding gaskets 4 on the guide discharge mechanism 18 at the corresponding position. After the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new welding gaskets 4 in sequence. At the same time, the second vertical clamping mechanism drives the five welding gaskets 4 to move to the top of the flip clamping mechanism 22 where the flexible diaphragm 5 has been installed, and installs the five welding gaskets 4 on the corresponding valve body lower shell 2. After the installation and placement are completed, it returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping and installation of the welding gasket 4. At the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 to move to the position of the second shell clamping mechanism, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the second vertical clamping mechanism, and the clamping action of the second vertical clamping mechanism is repeated; The second shell clamping mechanism moves under the drive of the moving mechanism 21 at the corresponding position, clamps the five valve body upper shells 1 on the guide discharge mechanism 18 at the corresponding position, and after the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new valve body upper shells 1 in sequence, and at the same time, the second shell clamping mechanism drives the five valve body upper shells 1 to move to the top of the flip clamping mechanism 22 where the welding gasket 4 has been installed, and continues to move to install the five valve body upper shells 1 on the valve body lower shell 2, and after the installation is completed, returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping of the valve body upper shell 1, and at the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 and the assembled valve body thereon to move to the position of the welding mechanism 23, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the second shell clamping mechanism, and repeats the clamping action of the second shell clamping mechanism; The welding mechanism 23 moves to the top of the assembled valve body and welds the valve body together, then returns to the initial position and waits for the next welding. At the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 and the welded valve body to the position of the vibrating guide plate 72. The rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the welding mechanism 23 and repeats the welding action of the welding mechanism 23. Then, the flip clamping mechanism 22 moves and flips a certain angle, and the welded valve body thereon leaves the flip clamping mechanism 22 and falls on the vibrating guide plate 72. After being vibrated and detected by the vibrating guide plate 72, it falls on the conveyor 27 and is transported out.

[0065] A supporting plate 28 is provided on the rotating table 24, and a plurality of flip openings 30 and a plurality of blocking grooves 31 are opened on the outer side of the upper end of the supporting plate 28, and the blocking grooves 31 are located on the inner side of the flip openings 30 at corresponding positions. A plurality of wedge-shaped guide plates 29 are provided on the supporting plate 28, and the wedge-shaped guide plates 29 are located on the sides of the flip openings 30 at corresponding positions. The wedge-shaped guide plates 29 are fan-shaped, and the fan shape is hollow.

[0066] The flip opening 30 and the blocking groove 31 are used to install the flip clamping mechanism 22, and the wedge-shaped guide plate 29 is used to release the flip clamping mechanism 22 from clamping the valve body when the flip clamping mechanism 22 flips.

[0067] The flip clamping mechanism 22 includes a flip plate 39, an electric push rod 32, a clamping seat 35 and two symmetrically arranged return springs 34. The electric push rod 32 is fixed on the frame 16. The flip plate 39 is hinged in the flip opening 30 of the supporting plate 28. A limit baffle 33 is provided at the end of the flip plate 39. The limit baffle 33 matches the size of the blocking groove 31. A triangular lifting plate is provided in the middle position below the flip plate 39. One end of the two return springs 34 are fixed below the flip plate 39, and the two return springs 34 are respectively located on both sides of the lifting plate. The other ends of the two return springs 34 are fixed below the supporting plate 28. The clamping seat 35 is arranged at the upper end of the flip plate 39. At the end, the clamping seat 35 is provided with five equidistant fixed seats 38, and the clamping seat 35 is slidably provided with five equidistant sliding seats 37. Both the sliding seat 37 and the fixed seat 38 are provided with semicircular clamping openings, and a clamping hole is formed between two corresponding positions, and a clamping spring is provided between the side of the sliding seat 37 and the clamping seat 35. Two symmetrically arranged pull rods 36 are provided between the five sliding seats 37, and the two pull rods 36 are respectively located at the two ends of the sliding seat 37. The ends of the two pull rods 36 extend out of the end of the clamping seat 35, and a pull plate 40 is provided between the ends of the two pull rods 36, and a stretching opening is formed between the pull plate 40, the end of the clamping seat 35 and the two pull rods 36.

[0068] When clamping the valve body lower shell 2, the valve body lower shell 2 pushes the sliding seat 37 to move, and the sliding seat 37 pushes the clamping spring. After the valve body lower shell 2 enters, it is clamped between the sliding seat 37 and the fixed seat 38 under the action of the clamping spring; The telescopic end of the electric push rod 32 pushes the lifting plate, and the lifting plate pushes the flip plate 39 and the clamping seat 35 thereon to flip. During the flipping process, the pull plate 40 moves along the wedge-shaped guide plate 29 at the corresponding position away from the clamping seat 35. During the movement, the pull plate 40 pulls the two pull rods 36 to move, and the two pull rods 36 pull the five sliding seats 37 to slide and squeeze the clamping springs, thereby loosening the clamping of the welded valve body. After the flipping is completed, the telescopic end of the electric push rod 32 returns to the initial position, and the flip plate 39 returns to the initial position under the action of the two reset springs 34. The limit baffle 33 is used to block the flip plate 39.

[0069] The guide discharge mechanism 18 includes a support rod 42 and a support frame 41, and the support rod 42 and the support frame 41 are both fixed on the frame 16. A guide rod 44 is provided at the upper end of the support rod 42, and the end of the guide rod 44 is connected to the discharge port of the vibration plate 17 at the corresponding position. A feeding trough is provided on the guide rod 44, and two symmetrically arranged limiting guide plates 43 are provided on the guide rod 44. The two limiting guide plates 43 are both located in the feeding trough, and a discharge plate 48 is provided on one side of the upper end of the support frame 41. Five equidistant and uniformly distributed discharge ports are provided on the upper end of the discharge plate 48, and a U-shaped limiting guide plate 47 is provided at the lower end of the discharge plate 48. One side of the limiting guide plate 47 is provided with five equidistant and uniformly distributed discharge ports. The end of the limiting guide plate 47 is connected to the limiting guide plate 43, the position and size of the pushing port correspond to the discharge port, an electric push rod 3 50 is fixed to the other side of the upper end of the support frame 41, and a pushing plate 49 is provided on the telescopic end of the electric push rod 3 50, and five equidistant and evenly distributed pushing blocks are provided on the pushing plate 49, and the pushing blocks correspond to the position and size of the pushing port, and the lower end surface of the pushing block is higher than the upper end surface of the limiting guide plate 47, an electric push rod 2 45 is fixed under the support frame 41, and a top plate 46 is fixed on the telescopic end of the electric push rod 2 45, and five equidistant and evenly distributed top blocks are provided on the top plate 46, and the top blocks correspond to the position and size of the discharge port.

[0070] The vibration plate 17 conveys the valve body components to the guide rod 44, enters the feeding trough, and is guided and conveyed to the limit guide plate 2 47 through the limit guide plate 1 43. The valve body components are arranged on the limit guide plate 2 47, and then the telescopic end of the electric push rod 3 50 drives the push plate 49 to move, and the push plate 49 drives the five push blocks thereon to move, and the five push blocks push the five valve body components to move toward the discharge port at the corresponding position. When pushing in, the end face of the push block does not enter the discharge port, and then the telescopic end of the electric push rod 2 45 drives the ejection plate 46 to move, and the ejection plate 46 drives the five ejection blocks to move, and lifts the five valve body components for easy clamping.

[0071] The moving mechanism 21 includes a moving frame 51, which is fixed on the frame 16. A moving seat 1 53 is slidably provided on the upper end of the side of the moving frame 51. A horizontally arranged electric push rod 4 52 is fixed on the moving frame 51. The electric push rod 4 52 is fixedly connected to the moving seat 1 53. A moving seat 2 55 is slidably provided on the moving seat 1 53. A vertically arranged electric push rod 5 54 is fixed on the moving seat 1 53. The telescopic end of the electric push rod 5 54 is fixedly connected to the moving seat 2 55.

[0072] The telescopic end of the electric push rod 4 52 drives the moving seat 1 53 to move and slide on the moving frame 51 , and the moving seat 1 53 drives the electric push rod 5 54 thereon to move, and the telescopic end of the electric push rod 5 54 drives the moving seat 2 55 to slide on the moving seat 1 53 .

[0073] The shell clamping mechanism 19 includes a mounting support plate 157, an electric push rod 656, a fixed plate 158 and a drive motor 261. The mounting support plate 157 is fixed on the movable seat 255 at the corresponding position. The electric push rod 656 is arranged on the mounting support plate 157. The telescopic end of the electric push rod 656 is fixedly connected to the fixed plate 158. The drive motor 261 is fixed to the side of the fixed plate 158. The fixed plate 158 is slidably arranged on the mounting support plate 157. Five equidistant and evenly distributed clamping claws 159 are arranged on the fixed plate 158. A transmission shaft 160 is rotatably arranged on the fixed plate 158. The transmission shaft 160 is transmission-connected to the output shaft of the drive motor 261. The transmission shaft 160 is transmission-connected to the five clamping claws 159 respectively. The clamping claw 159 is provided with a clamping claw hole matching the size of the valve body lower shell 2. The shell clamping mechanism 2 has the same structure as the shell clamping mechanism 1 19 .

[0074] The telescopic end of the electric push rod 6 56 drives the fixed plate 1 58 to move, the fixed plate 1 58 drives the five clamping claws 1 59 to move, the output shaft of the driving motor 2 61 drives the transmission shaft 1 60 to move, the transmission shaft 1 60 drives the five clamping claws 1 59 to move, and the clamping is completed.

[0075] The vertical clamping mechanism 20 includes an installation support plate 2 63, a drive motor 3 64, a fixed plate 2 65 and an electric push rod 7 62. The installation support plate 2 63 is fixed on the movable seat 2 55 at the corresponding position, the electric push rod 7 62 is fixed on the installation support plate 2 63, the drive motor 3 64 is fixed on the side of the fixed plate 2 65, the fixed plate 2 65 is slidably set on the installation support plate 2 63, the fixed plate 2 65 is fixedly connected to the telescopic end of the electric push rod 7 62, five equidistant and evenly distributed clamping claws 2 67 are provided on the fixed plate 2 65, and a transmission shaft 2 66 is rotatably provided on the fixed plate 2 65, the transmission shaft 2 66 is transmission-connected to the output shaft of the drive motor 3 64, and the transmission shaft 2 66 is transmission-connected to the five clamping claws 2 67.

[0076] The structure of the vertical clamping mechanism 2 is the same as that of the vertical clamping mechanism 1 20 .

[0077] A plurality of spring connecting rods are provided between the vibration guide plate 72 and the mounting groove 25 , and the end of the vibration guide plate 72 abuts against the bottom plate 26 . A vibration motor is fixed on the vibration guide plate 72 , and a corrugated protrusion is provided on the upper end of the vibration guide plate 72 .

[0078] The telescopic end of the electric push rod 7 62 drives the mounting support plate 2 63 to slide on the fixed plate 2 65 , and the mounting support plate 2 63 drives the five clamping claws 2 67 to move, and the output shaft of the driving motor 3 64 drives the transmission shaft 2 66 to move, and the transmission shaft 2 66 drives the five clamping claws 2 67 to move, thereby completing the clamping action; The vibration motor drives the vibration guide plate 72 to vibrate, and the welded valve body falling on the vibration guide plate 72 causes the corrugated protrusions on the vibration guide plate 72 to vibrate, thereby detecting the structural stability of the welded valve body.

[0079] The welding mechanism 23 includes an electric screw member 68 , which is disposed on the frame 16 . A screw slide 69 is disposed on the electric screw member 68 . A base 70 is fixed on the screw slide 69 . Five ultrasonic welders 71 are evenly spaced and arranged at equal distances from each other.

[0080] The electric screw member 68 is started, and the screw slide 69 drives the base 70 and the five ultrasonic welders 71 thereon to move. The welding head contacts the valve body, and then welding begins. Under the action of ultrasonic waves, the valve body lower shell 2, the valve body upper shell 1 and the welding gasket 4 are welded together to enhance the sealing effect.

[0081] The working principle of the present invention is: an order is placed, a production order is issued, and the production volume is set according to the order volume; Valve body production, vulcanization production of flexible diaphragm 5 and welding gasket 4, injection molding production of shell; Assemble and weld, assemble and weld: assemble and weld according to the process; The staff places the valve body lower shell 2, the valve body upper shell 1, the flexible diaphragm 5 and the welding gasket 4 in the corresponding positions of the vibration plate 17 respectively, and then the vibration plate 17 conveys the components therein out and enters the guide discharge mechanism 18 in the corresponding position, and the guide discharge mechanism 18 discharges the components in sequence, that is, the vibration plate 17 conveys the valve body components to the guide rod 44, enters the feeding trough, and is guided and conveyed to the limit guide plate 2 47 by the limit guide plate 1 43. The valve body components are arranged on the limit guide plate 2 47, and then the telescopic end of the electric push rod 3 50 drives the push plate 49 to move, and the push plate 49 drives the five push blocks thereon to move, and the five push blocks push the five valve body components to move toward the discharge port at the corresponding position. When pushing in, the end face of the push block does not enter the discharge port, and then the telescopic end of the electric push rod 2 45 drives the top plate 46 to move, and the top plate 46 drives the five top blocks to move, and the five valve body components are lifted for easy clamping; The shell clamping mechanism 19 is driven by the moving mechanism 21 at the corresponding position to move, that is, the telescopic end of the electric push rod 4 52 drives the moving seat 1 53 to move and slide on the moving frame 51, and the moving seat 1 53 drives the electric push rod 5 54 thereon to move, and the telescopic end of the electric push rod 54 drives the moving seat 2 55 to slide on the moving seat 1 53, clamping the five valve body lower shells 2 on the guide discharge mechanism 18 at the corresponding position, that is, the telescopic end of the electric push rod 6 56 drives the fixed plate 1 58 to move, and the fixed plate 1 58 drives the five clamping claws 1 59 to move, and the output shaft of the driving motor 2 61 drives the transmission shaft 1 60 to move, and the transmission shaft 1 60 drives the five clamping claws 1 59 to move to complete the clamping. After the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new valve body lower shells 2 in sequence, and at the same time, the shell clamp The holding mechanism 19 drives the five valve body lower shells 2 to move to the top of the clamping seat 35 on the rotating table 24, and continues to move to place the five valve body lower shells 2 on the flip clamping mechanism 22, that is, the valve body lower shell 2 pushes the sliding seat 37 to move, and the sliding seat 37 pushes the clamping spring. After the valve body lower shell 2 enters, it is clamped between the sliding seat 37 and the fixed seat 38 under the action of the clamping spring. After completing the clamping and placement, it returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping of the valve body lower shell 2. At the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 and the five valve body lower shells 2 thereon to move to the position of the vertical clamping mechanism 20, and the rotating table 24 stops moving. At this time, one flip clamping mechanism 22 moves to the position of the shell clamping mechanism 19, and repeats the clamping action of the shell clamping mechanism 19; The vertical clamping mechanism 1 20 moves under the drive of the moving mechanism 21 at the corresponding position, clamping the five flexible diaphragms 5 on the guide discharge mechanism 18 at the corresponding position, that is, the telescopic end of the electric push rod 7 62 drives the mounting support plate 2 63 to slide on the fixed plate 2 65, the mounting support plate 2 63 drives the five clamping claws 2 67 to move, the output shaft of the driving motor 3 64 drives the transmission shaft 2 66 to move, the transmission shaft 2 66 drives the five clamping claws 2 67 to move, and the clamping action is completed. After the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new flexible diaphragms 5 in sequence, and the same At this time, the vertical clamping mechanism 1 20 drives the five flexible diaphragms 5 to move to the top of the flip clamping mechanism 22 where the valve body lower shell 2 has been placed, and installs the five flexible diaphragms 5 in the corresponding valve body lower shell 2. After the installation and placement are completed, they return to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping and installation of the flexible diaphragm 5. At the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 to move to the position of the vertical clamping mechanism 2, and the rotating table 24 stops moving. At this time, one flip clamping mechanism 22 moves to the position of the vertical clamping mechanism 1 20, and the clamping action of the vertical clamping mechanism 1 20 is repeated; The second vertical clamping mechanism moves under the drive of the moving mechanism 21 at the corresponding position, and the second vertical clamping mechanism clamps the five welding gaskets 4 on the guide discharge mechanism 18 at the corresponding position. After the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new welding gaskets 4 in sequence. At the same time, the second vertical clamping mechanism drives the five welding gaskets 4 to move to the top of the flip clamping mechanism 22 where the flexible diaphragm 5 has been installed, and installs the five welding gaskets 4 on the corresponding valve body lower shell 2. After the installation and placement are completed, it returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping and installation of the welding gasket 4. At the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 to move to the position of the second shell clamping mechanism, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the second vertical clamping mechanism, and the clamping action of the second vertical clamping mechanism is repeated; The second shell clamping mechanism moves under the drive of the moving mechanism 21 at the corresponding position, clamps the five valve body upper shells 1 on the guide discharge mechanism 18 at the corresponding position, and after the clamping is completed, the guide discharge mechanism 18 at the corresponding position moves to discharge the five new valve body upper shells 1 in sequence, and at the same time, the second shell clamping mechanism drives the five valve body upper shells 1 to move to the top of the flip clamping mechanism 22 where the welding gasket 4 has been installed, and continues to move to install the five valve body upper shells 1 on the valve body lower shell 2, and after the installation is completed, returns to the top of the corresponding guide discharge mechanism 18, waiting for the next clamping of the valve body upper shell 1, and at the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 and the assembled valve body thereon to move to the position of the welding mechanism 23, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the second shell clamping mechanism, and repeats the clamping action of the second shell clamping mechanism; The welding mechanism 23 moves to the top of the assembled valve body and welds the valve body together, that is, the electric screw rod 68 is started, the screw rod slide 69 drives the base 70 and the five ultrasonic welders 71 thereon to move, the welding head contacts the valve body, and then welding begins. Under the action of ultrasonic waves, the valve body lower shell 2, the valve body upper shell 1 and the welding gasket 4 are welded together, and then return to the initial position, waiting for the next welding. At the same time, the rotating table 24 rotates to drive the flip clamping mechanism 22 and the welding valve body to the position of the vibrating guide plate 72, and the rotating table 24 stops moving. At this time, a flip clamping mechanism 22 moves to the position of the welding mechanism 23, and the welding action of the welding mechanism 23 is repeated; Then the flip clamping mechanism 22 moves, and the flip clamping mechanism 22 flips a certain angle, that is, the telescopic end of the electric push rod 1 32 pushes the lifting plate, and the lifting plate pushes the flip plate 39 and the clamping seat 35 thereon to flip. During the flipping process, the pull plate 40 moves away from the clamping seat 35 along the wedge-shaped guide plate 29 at the corresponding position. During the movement, the pull plate 40 pulls the two pull rods 36 to move, and the two pull rods 36 pull the five sliding seats 37 to slide and squeeze the clamping springs, thereby releasing the clamping of the welding valve body. After the flipping is completed, the telescopic end of the electric push rod 1 32 returns to the initial position, and the flip plate 39 returns to the initial position under the action of the two reset springs 34. The welding valve body thereon leaves the flip clamping mechanism 22 and falls on the vibrating guide plate 72. The vibration motor drives the vibrating guide plate 72 to vibrate, and after the vibration detection of the vibrating guide plate 72, it falls on the conveyor 27 and is transported out. Air tightness test: Check air tightness by introducing 0-5KPa compressed air from the upper shell air pipe 8, and the air intake is smooth; introduce 2KPa compressed air from the lower shell air pipe 12 for 5 seconds, and all parts have no leakage, meeting the design requirements; The products are fully inspected. For products that pass the airtightness test, appearance inspection and size inspection are carried out. The qualified products are packaged and shipped.

[0082] The vacuum pressure-maintaining valve has a stable structure and good sealing performance, and can meet the requirements of stable operation under different working conditions.

[0083] This production process has a high degree of automation, high production efficiency and good product yield. The assembly and welding equipment used in this production process can perform batch assembly, welding and product inspection output of vacuum pressure-maintaining valves through the automated operations of sequenced material arrangement, sequential clamping assembly, valve body welding, product flipping and vibration inspection output.

[0084] The vibration plate 17 cooperates with the guide discharge mechanism 18 at the corresponding position to convey the valve body parts and discharge the valve body parts in sequence, which is convenient for clamping and assembly; The moving mechanism 21 cooperates with the shell clamping mechanism 19, the vertical clamping mechanism 1 20, the shell clamping mechanism 2 and the vertical clamping mechanism 2 respectively to accurately and stably clamp and transport the valve body parts in batches, thereby realizing batch assembly; The welding mechanism 23 cooperates with the flipping and clamping mechanism 22 to achieve batch welding with high welding efficiency; The clamping mechanism 22 is flipped at a certain angle to loosen the clamping of the welded valve body, and the valve body is automatically output and cooperates with the vibrating material guide plate 72 to achieve a preliminary inspection of the welded valve body.

[0085] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vacuum pressure-maintaining valve, comprising a valve body upper shell (1) and a valve body lower shell (2), characterized in that: The valve body upper shell (1) is sleeved on the valve body lower shell (2), a flexible diaphragm (5) is provided in the internal space formed by the valve body upper shell (1) and the valve body lower shell (2), the flexible diaphragm (5) respectively abuts against the valve body upper shell (1) and the valve body lower shell (2), and a welding gasket (4) is provided between the outer side of the valve body upper shell (1) and the outer side of the valve body lower shell (2); The valve body upper shell (1) comprises an upper shell body (7) and an upper shell air pipe (8), the upper shell body (7) is located below the upper shell air pipe (8), a wedge-shaped sleeve pipe (6) is provided on the upper shell body (7), and the interior of the wedge-shaped sleeve pipe (6) is connected to the upper shell air pipe (8); The valve body lower shell (2) comprises a lower shell body (11) and a lower shell air pipe (12), wherein the lower shell air pipe (12) is located below the lower shell body (11), a sleeve groove (10) is provided in the lower shell body (11), and the shape and size of the sleeve groove (10) match the wedge-shaped sleeve pipe (6), and an air passage (15), a support seat (9) and a plurality of circumferentially evenly distributed limiting columns (13) are provided in the lower shell body (11), the support seat (9) is located in the middle of the plurality of limiting columns (13), the air passage (15) is located between the plurality of limiting columns (13) and the sleeve groove (10), and a plurality of air holes (14) are provided below the support seat (9), the air holes (14) are all connected to the air passage (15), and the air holes (14) are all connected to the lower shell air pipe (12).

2. A vacuum pressure maintaining valve according to claim 1, characterized in that: The flexible diaphragm (5) is arranged on the support seat (9), the top of the flexible diaphragm (5) abuts against the inner top of the upper shell body (7), the flexible diaphragm (5) is in an inverted skirt shape, and the top of the flexible diaphragm (5) is made of elastic plastic; The welding gasket (4) is arranged between the outer sides of the lower shell body (11) and the upper shell body (7), and the welding gasket (4) is made of welding plastic.

3. A production process for a vacuum pressure-maintaining valve according to claim 2, characterized in that: The production process steps are as follows: Step 1: Place an order; the production order is issued and the production volume is set according to the order quantity; Step 2, valve body production: vulcanization production of flexible diaphragm (5) and welding gasket (4), injection molding production of shell; Step three, assembling and welding: assembling the produced housing, flexible diaphragm (5) and welding gasket (4) to form a vacuum pressure-maintaining valve, and welding the assembled valve body shell; Step 4: Air tightness test: Check air tightness to ensure that it meets the design requirements; Step 5: Full product inspection: For products that pass the airtightness test, we will conduct appearance inspection and size inspection, and the qualified products will be packaged and shipped; The equipment used for assembly and welding in step 3 includes a frame (16), a conveyor (27), a vibrating guide plate (72), a driving motor (3) and a rotating table (24). The frame (16) is provided with an inclined mounting groove (25), and a bottom plate (26) is provided at the end of the mounting groove (25). The vibrating guide plate (72) is inclinedly arranged in the mounting groove (25). The conveyor (27) is located below the vibrating guide plate (72), and the conveying direction of the conveyor (27) is parallel to the conveying direction of the vibrating guide plate (72). The output shaft of the driving motor (3) is drivingly connected to the input shaft of the conveyor (27). The rotating table (24) is arranged at the middle position of the upper end of the frame (16). The frame (16) is provided with four moving mechanisms (21), four vibrating plates (17), a welding mechanism (2 3), four guide and discharge mechanisms (18), four moving mechanisms (21), four vibration disks (17), welding mechanisms (23), vibration guide plates (72), and four guide and discharge mechanisms (18) are all located outside the rotating table (24), and the moving mechanisms (21) and the vibration disks (17) are alternately arranged. The positions of the four moving mechanisms (21), the welding mechanisms (23) and the vibration guide plates (72) are distributed in a circular pattern. The four moving mechanisms (21) are respectively provided with a shell clamping mechanism 1 (19), a vertical clamping mechanism 1 (20), a vertical clamping mechanism 2, and a shell clamping mechanism 2. The discharge port ends of the four vibration disks (17) are fixedly connected to the guide and discharge mechanisms (18). The rotating table (24) is hinged with a plurality of evenly distributed turning clamping mechanisms (22) in a circular pattern.

4. The production process of a vacuum pressure-maintaining valve according to claim 3, characterized in that: The rotating table (24) is provided with a supporting plate (28), the outer side of the upper end of the supporting plate (28) is provided with a plurality of turning openings (30) and a plurality of blocking grooves (31), and the blocking grooves (31) are located inside the turning openings (30) at corresponding positions. The supporting plate (28) is provided with a plurality of wedge-shaped guide plates (29), and the wedge-shaped guide plates (29) are located on the sides of the turning openings (30) at corresponding positions. The wedge-shaped guide plates (29) are fan-shaped and hollow.

5. The production process of a vacuum pressure-maintaining valve according to claim 4, characterized in that: The flip clamping mechanism (22) comprises a flip plate (39), an electric push rod (32), a clamping seat (35) and two symmetrically arranged return springs (34), wherein the electric push rod (32) is fixed on the frame (16), the flip plate (39) is hinged in the flip opening (30) of the supporting plate (28), a limit baffle (33) is provided at the end of the flip plate (39), and the limit baffle (33) matches the size of the blocking groove (31), a triangular lifting plate is provided in the middle position below the flip plate (39), one end of the two return springs (34) are fixed below the flip plate (39), and the two return springs (34) are respectively located on both sides of the lifting plate, and the other ends of the two return springs (34) are fixed below the supporting plate (28), and the clamping seat (35) is arranged on the flip plate (3 9) At the upper end, the clamping seat (35) is provided with five fixed seats (38) which are evenly spaced, and the clamping seat (35) is slidably provided with five sliding seats (37) which are evenly spaced, and the sliding seat (37) and the fixed seat (38) are both provided with semicircular clamping openings, and a clamping hole is formed between two corresponding positions, and a clamping spring is provided between the side of the sliding seat (37) and the clamping seat (35), and two symmetrically arranged pull rods (36) are provided between the five sliding seats (37), and the two pull rods (36) are respectively located at the two ends of the sliding seat (37), and the ends of the two pull rods (36) extend out of the end of the clamping seat (35), and a pull plate (40) is provided between the ends of the two pull rods (36), and a stretching opening is formed between the pull plate (40), the end of the clamping seat (35) and the two pull rods (36).

6. The production process of a vacuum pressure-maintaining valve according to claim 5, characterized in that: The guide discharge mechanism (18) comprises a support rod (42) and a support frame (41), the support rod (42) and the support frame (41) are both fixed on the frame (16), a guide rod (44) is provided at the upper end of the support rod (42), the end of the guide rod (44) is connected to the discharge port of the vibration plate (17) at the corresponding position, a feeding trough is provided on the guide rod (44), two symmetrically arranged limiting guide plates (43) are provided on the guide rod (44), the two limiting guide plates (43) are both located in the feeding trough, a discharge plate (48) is provided on one side of the upper end of the support frame (41), five equidistant and evenly distributed discharge ports are provided on the upper end of the discharge plate (48), a U-shaped limiting guide plate (47) is provided at the lower end of the discharge plate (48), one side of the limiting guide plate (47) is provided Five equally spaced push openings are provided, the end of the second limiting guide plate (47) is connected to the first limiting guide plate (43), the position and size of the push openings correspond to the discharge openings, an electric push rod (50) is fixed to the other side of the upper end of the support frame (41), a push plate (49) is provided on the telescopic end of the electric push rod (50), and five equally spaced push blocks are provided on the push plate (49), the push blocks correspond to the position and size of the push openings, the lower end surface of the push block is higher than the upper end surface of the second limiting guide plate (47), an electric push rod (45) is fixed below the support frame (41), a push plate (46) is fixed on the telescopic end of the electric push rod (45), and five equally spaced push blocks are provided on the push plate (46), the push blocks correspond to the position and size of the discharge openings.

7. The production process of a vacuum pressure-maintaining valve according to claim 6, characterized in that: The moving mechanism (21) comprises a moving frame (51), the moving frame (51) is fixed on the frame (16), a moving seat 1 (53) is slidably provided on the upper end of the side of the moving frame (51), a horizontally arranged electric push rod 4 (52) is fixed on the moving frame (51), the electric push rod 4 (52) is fixedly connected to the moving seat 1 (53), a moving seat 2 (55) is slidably provided on the moving seat 1 (53), a vertically arranged electric push rod 5 (54) is fixed on the moving seat 1 (53), and the telescopic end of the electric push rod 5 (54) is fixedly connected to the moving seat 2 (55); The housing clamping mechanism (19) comprises a mounting support plate (57), an electric push rod (56), a fixed plate (58) and a drive motor (61). The mounting support plate (57) is fixed on the movable seat (55) at a corresponding position. The electric push rod (56) is arranged on the mounting support plate (57). The telescopic end of the electric push rod (56) is fixedly connected to the fixed plate (58). The drive motor (61) is fixed on the side of the fixed plate (58). The fixing plate (58) is slidably arranged on the mounting support plate (57), and five clamping claws (59) are arranged on the fixing plate (58) and are evenly spaced. A transmission shaft (60) is rotatably arranged on the fixing plate (58), and the transmission shaft (60) is transmission-connected to the output shaft of the driving motor (61). The transmission shaft (60) is transmission-connected to the five clamping claws (59) respectively, and a clamping claw hole matching the size of the valve body lower shell (2) is opened on the clamping claw (59); The shell clamping mechanism 2 has the same structure as the shell clamping mechanism 1 (19).

8. The production process of a vacuum pressure-maintaining valve according to claim 7, characterized in that: The vertical clamping mechanism 1 (20) comprises a mounting support plate 2 (63), a driving motor 3 (64), a fixed plate 2 (65) and an electric push rod 7 (62), wherein the mounting support plate 2 (63) is fixed on a movable seat 2 (55) at a corresponding position, the electric push rod 7 (62) is fixed on the mounting support plate 2 (63), the driving motor 3 (64) is fixed on the side of the fixed plate 2 (65), the fixed plate 2 (65) is slidably arranged on the mounting support plate 2 (63), the fixed plate 2 (65) is fixedly connected to the telescopic end of the electric push rod 7 (62), the fixed plate 2 (65) is provided with five equidistant and evenly distributed clamping claws 2 (67), the fixed plate 2 (65) is rotatably provided with a transmission shaft 2 (66), the transmission shaft 2 (66) is transmission-connected to the output shaft of the driving motor 3 (64), and the transmission shaft 2 (66) is transmission-connected to the five clamping claws 2 (67); The structure of the vertical clamping mechanism 2 is the same as that of the vertical clamping mechanism 1 (20); A plurality of spring connecting rods are provided between the vibration guide plate (72) and the mounting groove (25), and the end of the vibration guide plate (72) abuts against the bottom plate (26). A vibration motor is fixed to the vibration guide plate (72), and a corrugated protrusion is provided at the upper end of the vibration guide plate (72).

9. The production process of a vacuum pressure-maintaining valve according to claim 8, characterized in that: The welding mechanism (23) comprises an electric screw member (68), the electric screw member (68) being arranged on a frame (16), a screw slide (69) being arranged on the electric screw member (68), a base (70) being fixed on the screw slide (69), and five ultrasonic welders (71) being arranged at equal distances from each other on the base (70).

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