A vacuum pressure holding valve and its production process

Abstract

The present invention provides a vacuum pressure-holding valve and its production process, belonging to the technical field of valve body production. It solves the technical problems such as poor sealing performance, easy generation of whistling, and low production automation degree of the existing vacuum pressure-holding valve. This vacuum pressure-holding valve includes an upper valve body shell and a lower valve body shell. The upper valve body shell is sleeved on the lower valve body shell. A flexible diaphragm is arranged in the internal space formed by the upper valve body shell and the lower valve body shell. The flexible diaphragm abuts against the upper valve body shell and the lower valve body shell respectively. A welding gasket is arranged between the outer side of the upper valve body shell and the outer side of the lower valve body shell. This production process includes the following steps: placing an order; valve body production; assembly and welding; airtight test; full inspection of products. The present invention can carry out batch production of the vacuum pressure-holding valve through sequencing and discharging, clamping and assembling in sequence, valve body welding, product flipping, and vibration detection and output. The vacuum pressure-holding valve has a stable structure, good sealing performance, no whistling, high production process automation degree, high production efficiency, and good product yield.

Description

Technical Field

[0001] The present 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 its production process. Background Art

[0002] In the field of fluid control, the performance and quality of valves are crucial for the stable operation of the system. Traditional vacuum pressure maintaining valves have some deficiencies in practical applications. The existing structure of vacuum pressure maintaining valve products will generate resonance through gases. When the resonance reaches a certain frequency, the internal valve core structure will vibrate and produce harsh whistling sounds, which greatly affects the use and experience of customers. Moreover, the production processes of some vacuum pressure maintaining valves are relatively complex, with low automation and low production efficiency, making it difficult to meet the requirements 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 inspection and output of vacuum pressure maintaining valves through automated operations such as sequencing and discharging materials, clamping and assembling in sequence, valve body welding, product flipping, and vibration detection and output. The vacuum pressure maintaining valve has a stable structure, good sealing performance, can operate stably under different working conditions without generating whistling, 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 problems existing in the prior art and propose a vacuum pressure maintaining valve and its production process. The technical problem to be solved by this invention is: how to achieve batch production of a vacuum pressure maintaining valve with a stable structure and good sealing performance through sequencing and discharging materials, clamping and assembling in sequence, valve body welding, product flipping, and vibration detection and output.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A vacuum pressure maintaining valve includes an upper valve body shell and a lower valve body shell. The upper valve body shell is sleeved on the lower valve body shell. A flexible diaphragm is provided in the internal space formed by the upper valve body shell and the lower valve body shell. The flexible diaphragm abuts against the upper valve body shell and the lower valve body shell respectively. A welding gasket is provided between the outer side of the upper valve body shell and the outer side of the lower valve body shell.

[0007] The working principle of the present invention is as follows: When gas is introduced from the lower valve body shell, the gas pushes the flexible diaphragm to squeeze against the upper valve body shell, and the flexible diaphragm fits tightly with the upper valve body shell to block the passage of gas. When gas is introduced from the upper valve body shell and reaches a certain pressure, the gas pushes the flexible diaphragm to squeeze the lower valve body shell, and the flexible diaphragm is slightly deformed and leaves the upper valve body shell. The gas passes through the gap between the flexible diaphragm and the upper valve body shell. After the gas is no longer introduced, the flexible diaphragm pushes the welding gasket back to its initial position.

[0008] The valve body upper shell includes 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 fitting pipe is provided on the upper shell body, and the inside of the wedge-shaped fitting pipe is communicated with the upper shell air pipe.

[0009] With the above structure, the wedge-shaped fitting pipe is used to fit inside the valve body lower shell, and the wedge shape is convenient for fitting.

[0010] 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 inside the lower shell body. The shape and size of the fitting groove match those of the wedge-shaped fitting pipe. An air passage, a support seat, and a number of limiting columns evenly distributed in a circle are provided inside the lower shell body. The support seat is located in the middle of the number of limiting columns. The air passage is located between the number of limiting columns and the fitting groove. A number of air vents are provided below the support seat. The air vents are all communicated with the air passage and are all communicated with the lower shell air pipe.

[0011] With the above structure, the fitting groove is used to fit the wedge-shaped fitting pipe, which is convenient for assembly and increases the sealing performance at the same time. The air passage is used for ventilation and evenly blows towards the flexible diaphragm to ensure smooth gas passage. The support seat is used to support the flexible diaphragm and limit the stroke of the flexible diaphragm at the same time, reducing the whistling when the gas passes. The number of limiting columns is used to fix the flexible diaphragm.

[0012] The flexible diaphragm is arranged on the support seat. The top of the flexible diaphragm abuts against the inner top end 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.

[0013] With the above structure, when the gas passes, the flexible diaphragm controls the opening and closing of the valve through slight deformation at the top.

[0014] 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.

[0015] With the above structure, the welding gasket is used to connect the lower shell body and the upper shell body, which is convenient for welding and sealing and enhances the sealing performance.

[0016] A production process of a vacuum pressure maintaining valve is as follows:

[0017] Step 1, placing an order; The production order is issued, and the production quantity is set according to the order quantity;

[0018] Step 2, valve body production; The flexible diaphragm and the welding gasket are produced by vulcanization, and the housing is produced by injection molding;

[0019] Step 3, assembly and welding; The produced housing, flexible diaphragm, and welding gasket are assembled to form a vacuum pressure maintaining valve, and the assembled valve body shell is welded;

[0020] Step 4, airtightness test; Detect the airtightness to ensure that it meets the design requirements;

[0021] Step Five, full inspection of products: For the products that have passed the airtightness test, perform appearance inspection and dimensional inspection. The qualified products will be packaged and shipped.

[0022] The equipment used for assembly and welding in the third step includes a frame, a conveyor, a vibrating feeding plate, a driving motor 1, and a rotating table. An inclined installation groove is provided on the frame, and a bottom plate is provided at the end of the installation groove. The vibrating feeding plate is inclined and arranged in the installation groove. The conveyor is located below the vibrating feeding plate, and the conveying direction of the conveyor is parallel to the conveying direction of the vibrating feeding plate. The output shaft of the driving motor 1 is in transmission connection with the input shaft of the conveyor. The rotating table is arranged at the middle position of the upper end of the frame. Four moving mechanisms, four vibrating discs, a welding mechanism, and four guiding and discharging mechanisms are provided on the frame. The four moving mechanisms, four vibrating discs, the welding mechanism, the vibrating feeding plate, and the four guiding and discharging mechanisms are all located outside the rotating table, and the moving mechanisms and vibrating discs are arranged alternately. The positions of the four moving mechanisms, the welding mechanism, and the vibrating feeding plate are distributed in a circular pattern. A housing clamping mechanism 1, a vertical clamping mechanism 1, a vertical clamping mechanism 2, and a housing clamping mechanism 2 are successively provided on the four moving mechanisms. The discharge ports of the four vibrating discs are fixedly connected to the guiding and discharging mechanisms at the corresponding positions. A number of turnover clamping mechanisms evenly distributed in a circular pattern are hinged on the rotating table.

[0023] With the above structure, the staff places the valve body lower shell, valve body upper shell, flexible diaphragm, and welding gasket in the vibrating discs at the corresponding positions respectively. Subsequently, the vibrating discs convey the components therein and feed them into the guiding and discharging mechanisms at the corresponding positions. After the components are sequenced and discharged by the guiding and discharging mechanisms, the output shaft of the driving motor 1 drives the conveyor to move and convey the finished products.

[0024] The housing clamping mechanism 1 moves driven by the moving mechanism at the corresponding position, clamps five valve body lower shells on the guiding and discharging mechanism at the corresponding position. After the clamping is completed, the guiding and discharging mechanism at the corresponding position moves to sequence and discharge five new valve body lower shells. At the same time, the housing clamping mechanism 1 drives the five valve body lower shells to move to the position directly above the turnover clamping mechanism on the rotating table and continues to move to place the five valve body lower shells on the turnover clamping mechanism. After the clamping and placement are completed, it returns above the corresponding guiding and discharging mechanism, waiting to clamp the valve body lower shell next time. At the same time, the rotating table rotates to drive the turnover clamping mechanism and the five valve body lower shells thereon to move to the position of the vertical clamping mechanism 1. The rotating table pauses. At this time, a turnover clamping mechanism moves to the position of the housing clamping mechanism 1 and repeats the clamping action of the housing clamping mechanism 1.

[0025] The vertical clamping mechanism 1 moves driven by the moving mechanism at the corresponding position, clamps five flexible diaphragms on the guiding and discharging mechanism at the corresponding position. After the clamping is completed, the guiding and discharging mechanism at the corresponding position moves to sequence and discharge five new flexible diaphragms. At the same time, the vertical clamping mechanism 1 drives the five flexible diaphragms to move above the flipping and clamping mechanism where the valve body lower shell has been placed, and installs the five flexible diaphragms into the corresponding valve body lower shell. After the installation and placement are completed, it returns above the corresponding guiding and discharging mechanism, waiting for the next clamping and installation of flexible diaphragms. At the same time, the rotating table rotates to drive the flipping and clamping mechanism to move to the position of the vertical clamping mechanism 2. The rotating table pauses. At this time, one flipping and clamping mechanism moves to the position of the vertical clamping mechanism 1, repeating the clamping action of the vertical clamping mechanism 1;

[0026] The vertical clamping mechanism 2 moves driven by the moving mechanism at the corresponding position, clamps five welding gaskets on the guiding and discharging mechanism at the corresponding position. After the clamping is completed, the guiding and discharging mechanism at the corresponding position moves to sequence and discharge five new welding gaskets. At the same time, the vertical clamping mechanism 2 drives the five welding gaskets to move above the flipping and clamping mechanism where the flexible diaphragms have been installed and placed, and installs the five welding gaskets on the corresponding valve body lower shell. After the installation and placement are completed, it returns above the corresponding guiding and discharging mechanism, waiting for the next clamping and installation of welding gaskets. At the same time, the rotating table rotates to drive the flipping and clamping mechanism to move to the position of the housing clamping mechanism 2. The rotating table pauses. At this time, one flipping and clamping mechanism moves to the position of the vertical clamping mechanism 2, repeating the clamping action of the vertical clamping mechanism 2;

[0027] The housing clamping mechanism 2 moves driven by the moving mechanism at the corresponding position, clamps five valve body upper shells on the guiding and discharging mechanism at the corresponding position. After the clamping is completed, the guiding and discharging mechanism at the corresponding position moves to sequence and discharge five new valve body upper shells. At the same time, the housing clamping mechanism 2 drives the five valve body upper shells to move above the flipping and clamping mechanism where the welding gaskets have been installed and placed, and continues to move to install the five valve body upper shells on the valve body lower shell. After the installation is completed, it returns above the corresponding guiding and discharging mechanism, waiting for the next clamping of the valve body upper shell. At the same time, the rotating table rotates to drive the flipping and clamping mechanism and the assembled valve body on it to move to the position of the welding mechanism. The rotating table pauses. At this time, one flipping and clamping mechanism moves to the position of the housing clamping mechanism 2, repeating the clamping action of the housing clamping mechanism 2;

[0028] The welding mechanism moves above the assembled valve body and welds the valve bodies together, then returns to the initial position, waiting for the next welding. At the same time, the rotating table rotates to drive the flipping and clamping mechanism and the welded valve body to move to the position of the vibrating feeding plate. The rotating table pauses. At this time, one flipping and clamping mechanism moves to the position of the welding mechanism, repeating the welding action of the welding mechanism;

[0029] Subsequently, the flipping and clamping mechanism moves, the flipping and clamping mechanism flips by a certain angle, the welded valve body thereon leaves the flipping and clamping mechanism and falls onto the vibrating feeding plate. After being detected by the vibrating feeding plate, it falls onto the conveyor and is conveyed out;

[0030] A supporting plate is provided on the rotating table. A plurality of flipping openings and a plurality of blocking grooves are provided on the outer side of the upper end of the supporting plate, and the blocking grooves are located inside the flipping openings at corresponding positions. A plurality of wedge-shaped guiding plates are provided on the supporting plate. The wedge-shaped guiding plates are located on the side parts of the flipping openings at corresponding positions. The wedge-shaped guiding plates are fan-shaped and hollow in the middle.

[0031] With the above structure, the flipping openings and the blocking grooves are used to install the flipping and clamping mechanism, and the wedge-shaped guiding plates are used to loosen the clamping of the valve body by the flipping and clamping mechanism when the flipping and clamping mechanism flips.

[0032] The flipping and clamping mechanism includes a flipping plate, an electric push rod I, a clamping seat, and two symmetrically arranged reset springs. The electric push rod I is fixed on the frame. The flipping plate is hinged in the flipping opening of the supporting plate. A limiting baffle is provided at the end of the flipping plate, and the limiting baffle matches the size of the blocking groove. A triangular lifting plate is provided at the middle position below the flipping plate. One end of each of the two reset springs is fixed below the flipping plate, and the two reset springs are respectively located on both sides of the lifting plate. The other end of each of the two reset springs is fixed below the supporting plate. The clamping seat is arranged at the upper end of the flipping plate. Five equally spaced fixed seats are provided on the clamping seat. Five equally spaced sliding seats are slidably arranged on the clamping seat. Semi-circular clamping openings are provided on both the sliding seats and the fixed seats. Clamping holes are formed between two corresponding ones. A clamping spring is provided between the side part of the sliding seat and the clamping seat. Two symmetrically arranged pull rods are provided between the five sliding seats. The two pull rods are respectively located at both ends of the sliding seats. The ends of the two pull rods extend out of the end of the clamping seat, and a pull plate is provided between the ends of the two pull rods. A stretching opening is formed among the pull plate, the end of the clamping seat, and the two pull rods.

[0033] With the above structure, when clamping the lower shell of the valve body, the lower shell of the valve body pushes the sliding seat to move, 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;

[0034] The telescopic end of the electric push rod I pushes the lifting plate, the lifting plate pushes the flipping plate and the clamping seat thereon to flip. During the flipping process, the pull plate moves along the corresponding wedge-shaped guiding plate away from the clamping seat. During the movement, the pull plate pulls the two pull rods to move, the two pull rods pull the five sliding seats to slide, and squeeze the clamping spring, so as to loosen the clamping of the welded valve body. After the flipping is completed, the telescopic end of the electric push rod I returns to the initial position, and the flipping plate returns to the initial position under the action of the two reset springs. The limiting baffle is used to block the flipping plate.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] The first housing clamping mechanism includes a first mounting support plate, a sixth electric push rod, a first fixing plate, and a second driving motor. The first mounting support plate is fixed on the second moving seat at the corresponding position. The sixth electric push rod is arranged on the first mounting support plate. The telescopic end of the sixth electric push rod is fixedly connected to the first fixing plate. The second driving motor is fixed on the side of the first fixing plate. The first fixing plate is slidably arranged on the first mounting support plate. Five equally spaced and uniformly distributed first clamping jaws are provided on the first fixing plate. A first transmission shaft is rotatably arranged on the first fixing plate. The first transmission shaft is in transmission connection with the output shaft of the second driving motor. The first transmission shaft is respectively in transmission connection with the five first clamping jaws. A clamping jaw hole matching the size of the lower housing of the valve body is formed on the first clamping jaw.

[0040] The second housing clamping mechanism has the same structure as the first housing clamping mechanism.

[0041] With the above structure, the telescopic end of the sixth electric push rod drives the first fixing plate to move. The first fixing plate drives the five first clamping jaws to move. The output shaft of the second driving motor drives the first transmission shaft to move. The first transmission shaft drives the five first clamping jaws to move to complete the clamping.

[0042] The first vertical clamping mechanism includes a second mounting support plate, a third driving motor, a second fixing plate, and a seventh electric push rod. The second mounting support plate is fixed on the second moving seat at the corresponding position. The seventh electric push rod is fixed on the second mounting support plate. The third driving motor is fixed on the side of the second fixing plate. The second fixing plate is slidably arranged on the second mounting support plate. The second fixing plate is fixedly connected to the telescopic end of the seventh electric push rod. Five equally spaced and uniformly distributed second clamping jaws are provided on the second fixing plate. A second transmission shaft is rotatably arranged on the second fixing plate. The second transmission shaft is in transmission connection with the output shaft of the third driving motor. The second transmission shaft is in transmission connection with the five second clamping jaws.

[0043] The second vertical clamping mechanism has the same structure as the first vertical clamping mechanism.

[0044] A number of spring link rods are provided between the vibrating feeding plate and the installation groove. And the end of the vibrating feeding plate abuts against the bottom plate. A vibrating motor is fixed on the vibrating feeding plate. A corrugated protrusion is provided at the upper end of the vibrating feeding plate.

[0045] With the above structure, the telescopic end of the seventh electric push rod drives the second mounting support plate to slide on the second fixing plate. The second mounting support plate drives the five second clamping jaws to move. The output shaft of the third driving motor drives the second transmission shaft to move. The second transmission shaft drives the five second clamping jaws to move to complete the clamping action.

[0046] The vibrating motor drives the vibrating feeding plate to vibrate. The welded valve body falling on the vibrating feeding plate vibrates on the corrugated protrusion of the vibrating feeding plate to detect the structural stability of the welded valve body.

[0047] The welding mechanism includes an electric lead screw component, which is arranged on the frame. A lead screw slider is provided on the electric lead screw component, and a base is fixed on the lead screw slider. Five equally spaced and evenly distributed ultrasonic welders are provided on the base.

[0048] With the above structure, when the electric lead screw component starts, the lead screw slider drives the base and the five ultrasonic welders thereon to move. The welding head abuts against the valve body, and then welding starts. 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.

[0049] Compared with the prior art, the vacuum pressure maintaining valve and its production process have the following advantages:

[0050] The vacuum pressure maintaining valve has a stable structure and good sealing performance, and can operate stably under different working conditions.

[0051] This production process has a high degree of automation, high production efficiency and good product yield. The assembly and welding equipment adopted in this production process can carry out batch assembly, welding and product detection output of the vacuum pressure maintaining valve through automated operations such as sequencing and discharging, clamping and assembling in sequence, valve body welding, product flipping and vibration detection output.

[0052] Through the cooperation of the vibrating bowl and the guiding and discharging mechanism at the corresponding position, the valve body components are conveyed and sequenced for discharging, which is convenient for clamping and assembling;

[0053] Through the cooperation of the moving mechanism with the housing clamping mechanism one, the vertical clamping mechanism one, the housing clamping mechanism two and the vertical clamping mechanism two, the valve body components are accurately and stably clamped and transported in batches to achieve batch assembly;

[0054] The welding mechanism cooperates with the flipping and clamping mechanism for batch welding, and the welding efficiency is high;

[0055] Through the flipping and clamping mechanism to flip a certain angle to release the clamping of the welded valve body, and automatically output, and cooperate with the vibrating guide plate to realize the preliminary detection of the welded valve body. Description of the Drawings

[0056] Figure 1 It is a front view structural schematic diagram of the vacuum pressure maintaining valve in the present invention.

[0057] Figure 2 It is an exploded structural schematic diagram of the vacuum pressure maintaining valve in the present invention.

[0058] Figure 3 It is a sectional structural schematic diagram of the upper shell of the valve body in the present invention.

[0059] Figure 4 It is a three-dimensional structural schematic diagram of the lower shell of the valve body in the present invention.

[0060] Figure 5It is a schematic cross-sectional structure diagram of the lower housing of the valve body in the present invention.

[0061] Figure 6 It is a schematic three-dimensional structure diagram of the assembly and welding equipment in the present invention.

[0062] Figure 7 It is a schematic three-dimensional structure diagram of the rotating table in the present invention.

[0063] Figure 8 It is a schematic three-dimensional structure diagram of the flipping and clamping mechanism in the present invention.

[0064] Figure 9 It is a schematic three-dimensional structure diagram of the guiding and discharging mechanism in the present invention.

[0065] Figure 10 It is a schematic three-dimensional structure diagram of the moving mechanism in the present invention.

[0066] Figure 11 It is a schematic three-dimensional structure diagram of the first housing clamping mechanism in the present invention.

[0067] Figure 12 It is a schematic three-dimensional structure diagram of the first vertical clamping mechanism in the present invention.

[0068] Figure 13 It is a schematic three-dimensional structure diagram of the welding mechanism in the present invention.

[0069] Figure 14 It is a schematic diagram of the production process in the present invention.

[0070] In the figure, 1 is the upper housing of the valve body; 2 is the lower housing of the valve body; 3 is the first driving motor; 4 is the welding gasket; 5 is the flexible diaphragm; 6 is the wedge-shaped sleeve pipe; 7 is the upper housing body; 8 is the upper housing air pipe; 9 is the support seat; 10 is the fitting groove; 11 is the lower housing body; 12 is the lower housing air pipe; 13 is the limit post; 14 is the ventilation hole; 15 is the ventilation channel; 16 is the frame; 17 is the vibrating bowl feeder; 18 is the guiding discharging mechanism; 19 is the first housing clamping mechanism; 20 is the first vertical clamping mechanism; 21 is the moving mechanism; 22 is the flipping clamping mechanism; 23 is the welding mechanism; 24 is the rotating table; 25 is the installation groove; 26 is the bottom plate; 27 is the conveyor; 28 is the supporting plate; 29 is the wedge-shaped guiding plate; 30 is the flipping opening; 31 is the blocking groove; 32 is the first electric push rod; 33 is the limit baffle; 34 is the return spring; 35 is the clamping seat; 36 is the pull rod; 37 is the sliding seat; 38 is the fixed seat; 39 is the flipping plate; 40 is the pulling plate; 41 is the support frame; 42 is the support rod; 43 is the first limit guiding plate; 44 is the guiding rod; 45 is the second electric push rod; 46 is the ejector plate; 47 is the second limit guiding plate; 48 is the discharging plate; 49 is the pushing plate; 50 is the third electric push rod; 51 is the moving frame; 52 is the fourth electric push rod; 53 is the first moving seat; 54 is the fifth electric push rod; 55 is the second moving seat; 56 is the sixth electric push rod; 57 is the first installation and supporting plate; 58 is the first fixing plate; 59 is the first jaw; 60 is the first transmission shaft; 61 is the second driving motor; 62 is the seventh electric push rod; 63 is the second installation and supporting plate; 64 is the third driving motor; 65 is the second fixing plate; 66 is the second transmission shaft; 67 is the second jaw; 68 is the electric screw member; 69 is the screw sliding seat; 70 is the base; 71 is the ultrasonic welder; 72 is the vibrating guiding plate. Detailed implementation manners

[0071] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0072] As Figures 1 - 5 shown, this vacuum pressure maintaining valve includes the upper housing 1 of the valve body and the lower housing 2 of the valve body. The upper housing 1 of the valve body is sleeved on the lower housing 2 of the valve body. A flexible diaphragm 5 is arranged in the internal space formed by the upper housing 1 of the valve body and the lower housing 2 of the valve body. The flexible diaphragm 5 abuts against the upper housing 1 of the valve body and the lower housing 2 of the valve body respectively. A welding gasket 4 is arranged between the outer side of the upper housing 1 of the valve body and the outer side of the lower housing 2 of the valve body.

[0073] When gas is introduced from the lower housing 2 of the valve body, the gas pushes the flexible diaphragm 5 to squeeze against the upper housing 1 of the valve body. The flexible diaphragm 5 fits tightly against the upper housing 1 of the valve body, blocking the passage of gas. When gas is introduced from the upper housing 1 of the valve body and reaches a certain pressure, the gas pushes the flexible diaphragm 5 to squeeze the lower housing 2 of the valve body, and the flexible diaphragm 5 is slightly deformed and leaves the upper housing 1 of the valve body. The gas passes through the gap between the flexible diaphragm 5 and the upper housing 1 of the valve body. After the gas is no longer introduced, the flexible diaphragm 5 pushes the welding gasket 4 back to its initial position.

[0074] The upper housing 1 of the valve body includes an upper housing body 7 and an upper housing gas pipe 8. The upper housing body 7 is located below the upper housing gas pipe 8. A wedge-shaped fitting pipe 6 is provided on the upper housing body 7, and the inside of the wedge-shaped fitting pipe 6 is connected to the upper housing gas pipe 8.

[0075] The wedge-shaped fitting pipe 6 is used to fit inside the lower housing 2 of the valve body and is wedge-shaped for easy fitting.

[0076] The lower housing 2 of the valve body includes a lower housing body 11 and a lower housing gas pipe 12. The lower housing gas pipe 12 is located below the lower housing body 11. A fitting groove 10 is provided inside the lower housing body 11. The shape and size of the fitting groove 10 match those of the wedge-shaped fitting pipe 6. An air passage 15, a support seat 9, and a number of limit posts 13 evenly distributed in a circle are provided inside the lower housing body 11. The support seat 9 is located in the middle of the number of limit posts 13. The air passage 15 is located between the number of limit posts 13 and the fitting groove 10. A number of air holes 14 are provided below the support seat 9, and the air holes 14 are all connected to the air passage 15 and are all connected to the lower housing gas pipe 12.

[0077] The fitting groove 10 is used to fit the wedge-shaped fitting pipe 6, facilitating assembly and increasing the sealing performance at the same time. The air passage 15 is used for ventilation and evenly blowing towards 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 at the same time, reducing the whistling when gas passes through. The number of limit posts 13 is used to fix the flexible diaphragm 5.

[0078] The flexible diaphragm 5 is arranged on the support seat 9. The top of the flexible diaphragm 5 abuts against the inner top end of the upper housing 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.

[0079] When gas passes through, the flexible diaphragm 5 controls the opening and closing of the valve through slight deformation at the top.

[0080] The welding gasket 4 is arranged between the outside of the lower housing body 11 and the upper housing body 7. The welding gasket 4 is made of welding plastic.

[0081] The welding gasket 4 is used to connect the lower housing body 11 and the upper housing body 7, facilitating welding and sealing and enhancing the sealing performance.

[0082] Such as Figures 6 - 14As shown, the production process of this vacuum pressure maintaining valve is as follows:

[0083] Step 1: Place an order. The production order is issued, and the production quantity is set according to the order quantity.

[0084] Step 2: Produce the valve body. Vulcanize and produce the flexible diaphragm 5 and the welding gasket 4, and injection mold the housing.

[0085] Step 3: Assemble and weld. Assemble the produced housing, flexible diaphragm 5, and welding gasket 4 to form the vacuum pressure maintaining valve, and weld the assembled valve body housing.

[0086] Step 4: Air tightness test. Detect the air tightness to ensure that it meets the design requirements.

[0087] Step 5: Full inspection of the product. For the products that pass the air tightness test, conduct appearance inspection and dimensional inspection, and package and ship the products that pass the inspection.

[0088] 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 1 3, and a rotating table 24. An inclined installation groove 25 is provided on the frame 16, and a bottom plate 26 is provided at the end of the installation groove 25. The vibrating guide plate 72 is arranged in the installation 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 1 3 is in transmission connection with 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. Four moving mechanisms 21, four vibrating discs 17, a welding mechanism 23, and four guiding and discharging mechanisms 18 are provided on the frame 16. The four moving mechanisms 21, the four vibrating discs 17, the welding mechanism 23, the vibrating guide plate 72, and the four guiding and discharging mechanisms 18 are all located outside the rotating table 24, and the moving mechanisms 21 and the vibrating discs 17 are arranged alternately. The positions of the four moving mechanisms 21, the welding mechanism 23, and the vibrating guide plate 72 are distributed in a circular pattern. A housing clamping mechanism 1 19, a vertical clamping mechanism 1 20, a vertical clamping mechanism 2, and a housing clamping mechanism 2 are successively provided on the four moving mechanisms 21. The discharging ends of the four vibrating discs 17 are fixedly connected to the guiding and discharging mechanisms 18. A number of turnover clamping mechanisms 22 are articulated on the rotating table 24 and are evenly distributed in a circular pattern.

[0089] The staff respectively place the valve body lower shell 2, valve body upper shell 1, flexible diaphragm 5, and welding gasket 4 into the vibrating discs 17 at corresponding positions. Subsequently, the vibrating discs 17 convey the components therein out and into the guiding and discharging mechanisms 18 at corresponding positions. After the components are sorted and discharged by the guiding and discharging mechanisms 18, the output shaft of the driving motor 1 3 drives the conveyor 27 to move and convey the materials.

[0090] The housing clamping mechanism 19 moves driven by the moving mechanism 21 at the corresponding position, clamps the five valve body lower shells 2 on the guiding and discharging mechanism 18 at the corresponding position. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to sequentially discharge five new valve body lower shells 2. At the same time, the housing clamping mechanism 19 drives the five valve body lower shells 2 to move to directly above the flipping and clamping mechanism 22 on the rotating table 24, and continues to move to place the five valve body lower shells 2 on the flipping and clamping mechanism 22. After the clamping and placement are completed, it returns to directly above the corresponding guiding and discharging mechanism 18, waiting to clamp the valve body lower shells 2 next time. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 and the five valve body lower shells 2 thereon to move to the position of the vertical clamping mechanism 1. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the housing clamping mechanism 19, repeating the clamping action of the housing clamping mechanism 19;

[0091] The vertical clamping mechanism 1 moves driven by the moving mechanism 21 at the corresponding position, clamps the five flexible diaphragms 5 on the guiding and discharging mechanism 18 at the corresponding position. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to sequentially discharge five new flexible diaphragms 5. At the same time, the vertical clamping mechanism 1 drives the five flexible diaphragms 5 to move to directly above the flipping and clamping mechanism 22 where the valve body lower shell 2 has been placed, and installs the five flexible diaphragms 5 into the corresponding valve body lower shells 2. After the installation and placement are completed, it returns to directly above the corresponding guiding and discharging mechanism 18, waiting to clamp and install the flexible diaphragms 5 next time. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 to move to the position of the second vertical clamping mechanism. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the vertical clamping mechanism 1, repeating the clamping action of the vertical clamping mechanism 1;

[0092] The second vertical clamping mechanism moves driven by the moving mechanism 21 at the corresponding position. The second vertical clamping mechanism clamps the five welding gaskets 4 on the guiding and discharging mechanism 18 at the corresponding position. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to sequentially discharge five new welding gaskets 4. At the same time, the second vertical clamping mechanism drives the five welding gaskets 4 to move to directly above the flipping and clamping mechanism 22 where the flexible diaphragm 5 has been installed and placed, and installs the five welding gaskets 4 on the corresponding valve body lower shells 2. After the installation and placement are completed, it returns to directly above the corresponding guiding and discharging mechanism 18, waiting to clamp and install the welding gaskets 4 next time. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 to move to the position of the second housing clamping mechanism. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the second vertical clamping mechanism, repeating the clamping action of the second vertical clamping mechanism;

[0093] The second housing 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 guiding and discharging mechanism 18 at the corresponding position. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to orderly discharge five new valve body upper shells 1. At the same time, the second housing clamping mechanism drives the five valve body upper shells 1 to move above the flipping and clamping mechanism 22 where the welding gaskets 4 have been installed and placed, and continues to move to install the five valve body upper shells 1 on the valve body lower shells 2. After the installation is completed, it returns above the corresponding guiding and discharging mechanism 18, waiting to clamp the valve body upper shells 1 next time. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 and the assembled valve body on it to move to the position of the welding mechanism 23. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the second housing clamping mechanism and repeats the clamping action of the second housing clamping mechanism;

[0094] The welding mechanism 23 moves above the assembled valve body and welds the valve bodies together, and then returns to the initial position, waiting for the next welding. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 and the welded valve body to move to the position of the vibrating guiding plate 72. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the welding mechanism 23 and repeats the welding action of the welding mechanism 23;

[0095] Subsequently, the flipping and clamping mechanism 22 moves, the flipping and clamping mechanism 22 flips by a certain angle, the welded valve body on it leaves the flipping and clamping mechanism 22 and falls on the vibrating guiding plate 72. After being vibrationally detected by the vibrating guiding plate 72, it falls on the conveyor 27 and is conveyed out.

[0096] 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 number of flipping openings 30 and a number of blocking grooves 31, and the blocking grooves 31 are located inside the flipping openings 30 at the corresponding positions. The supporting plate 28 is provided with a number of wedge-shaped guiding plates 29. The wedge-shaped guiding plates 29 are located at the sides of the flipping openings 30 at the corresponding positions. The wedge-shaped guiding plates 29 are fan-shaped and the fan shape is hollow.

[0097] The flipping openings 30 and the blocking grooves 31 are used to install the flipping and clamping mechanism 22. The wedge-shaped guiding plates 29 are used to release the clamping of the flipping and clamping mechanism 22 on the valve body when the flipping and clamping mechanism 22 flips.

[0098] The flipping and clamping mechanism 22 includes a flipping plate 39, a first electric push rod 32, a clamping seat 35, and two symmetrically arranged reset springs 34. The first electric push rod 32 is fixed on the frame 16. The flipping plate 39 is hinged in the flipping opening 30 of the supporting plate 28. A limit baffle 33 is provided at the end of the flipping plate 39, and the limit baffle 33 matches the size of the blocking groove 31. A triangular lifting plate is provided at the middle position below the flipping plate 39. One end of each of the two reset springs 34 is fixed below the flipping plate 39, and the two reset springs 34 are respectively located on both sides of the lifting plate. The other end of each of the two reset springs 34 is fixed below the supporting plate 28. The clamping seat 35 is arranged at the upper end of the flipping plate 39. Five equally spaced and evenly distributed fixing seats 38 are provided on the clamping seat 35. Five equally spaced and evenly distributed sliding seats 37 are slidably arranged on the clamping seat 35. Semi-circular clamping openings are provided on both the sliding seat 37 and the fixing seat 38, and clamping holes are formed between two corresponding ones. 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. The two pull rods 36 are respectively located at both 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. A stretching opening is formed among the pull plate 40, the end of the clamping seat 35, and the two pull rods 36.

[0099] When clamping the lower shell 2 of the valve body, the lower shell 2 of the valve body pushes the sliding seat 37 to move. The sliding seat 37 pushes the clamping spring. After the lower shell 2 of the valve body enters, it is clamped between the sliding seat 37 and the fixing seat 38 under the action of the clamping spring.

[0100] The telescopic end of the first electric push rod 32 pushes the lifting plate, and the lifting plate pushes the flipping plate 39 and the clamping seat 35 thereon to flip. During the flipping process, the pull plate 40 moves along the corresponding wedge-shaped guide plate 29 away from the clamping seat 35. When moving, 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 first electric push rod 32 returns to the initial position, and the flipping 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 flipping plate 39.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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 .

[0105] The first housing clamping mechanism 19 includes a first mounting support plate 57, a sixth electric push rod 56, a first fixing plate 58, and a second driving motor 61. The first mounting support plate 57 is fixed on the second moving seat 55 at the corresponding position. The sixth electric push rod 56 is arranged on the first mounting support plate 57. The telescopic end of the sixth electric push rod 56 is fixedly connected to the first fixing plate 58. The second driving motor 61 is fixed on the side of the first fixing plate 58. The first fixing plate 58 is slidably arranged on the first mounting support plate 57. Five equally spaced and uniformly distributed first clamping jaws 59 are provided on the first fixing plate 58. A first transmission shaft 60 is rotatably arranged on the first fixing plate 58. The first transmission shaft 60 is in transmission connection with the output shaft of the second driving motor 61. The first transmission shaft 60 is respectively in transmission connection with the five first clamping jaws 59. A clamping jaw hole matching the size of the lower housing 2 of the valve body is formed on the first clamping jaw 59;

[0106] The second housing clamping mechanism has the same structure as the first housing clamping mechanism 19.

[0107] The telescopic end of the sixth electric push rod 56 drives the first fixing plate 58 to move. The first fixing plate 58 drives the five first clamping jaws 59 to move. The output shaft of the second driving motor 61 drives the first transmission shaft 60 to move. The first transmission shaft 60 drives the five first clamping jaws 59 to move to complete the clamping.

[0108] The first vertical clamping mechanism 20 includes a second mounting support plate 63, a third driving motor 64, a second fixing plate 65, and a seventh electric push rod 62. The second mounting support plate 63 is fixed on the second moving seat 55 at the corresponding position. The seventh electric push rod 62 is fixed on the second mounting support plate 63. The third driving motor 64 is fixed on the side of the second fixing plate 65. The second fixing plate 65 is slidably arranged on the second mounting support plate 63. The second fixing plate 65 is fixedly connected to the telescopic end of the seventh electric push rod 62. Five equally spaced and uniformly distributed second clamping jaws 67 are provided on the second fixing plate 65. A second transmission shaft 66 is rotatably arranged on the second fixing plate 65. The second transmission shaft 66 is in transmission connection with the output shaft of the third driving motor 64. The second transmission shaft 66 is in transmission connection with the five second clamping jaws 67.

[0109] The second vertical clamping mechanism has the same structure as the first vertical clamping mechanism 20.

[0110] A number of spring link rods are provided between the vibrating material guiding plate 72 and the installation groove 25. And the end of the vibrating material guiding plate 72 abuts against the bottom plate 26. A vibrating motor is fixed on the vibrating material guiding plate 72. A corrugated protrusion is provided at the upper end of the vibrating material guiding plate 72.

[0111] The telescopic end of the seventh electric push rod 62 drives the second mounting support plate 63 to slide on the second fixing plate 65. The second mounting support plate 63 drives the five second clamping jaws 67 to move. The output shaft of the third driving motor 64 drives the second transmission shaft 66 to move. The second transmission shaft 66 drives the five second clamping jaws 67 to move to complete the clamping action;

[0112] The vibrating motor drives the vibrating material guiding plate 72 to vibrate. The welded valve body that falls on the vibrating material guiding plate 72 vibrates on the corrugated protrusions of the vibrating material guiding plate 72, and the structural stability of the welded valve body is detected.

[0113] The welding mechanism 23 includes an electric lead screw member 68. The electric lead screw member 68 is arranged on the frame 16. A lead screw slider 69 is arranged on the electric lead screw member 68. A base 70 is fixed on the lead screw slider 69. Five equally spaced ultrasonic welders 71 are arranged on the base 70.

[0114] When the electric lead screw member 68 is started, the lead screw slider 69 drives the base 70 and the five ultrasonic welders 71 thereon to move. The welding head abuts against the valve body, and then welding starts. 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.

[0115] The working principle of the present invention: placing an order, the production order is issued, and the production quantity is set according to the order quantity;

[0116] Valve body production, vulcanizing and producing the flexible diaphragm 5 and the welding gasket 4, and injection molding the housing;

[0117] Assembly and welding, assembly and welding: assembly and welding are carried out according to the process;

[0118] The staff respectively place the valve body lower shell 2, the valve body upper shell 1, the flexible diaphragm 5 and the welding gasket 4 in the vibrating discs 17 at corresponding positions. Then the vibrating discs 17 convey the components therein out and into the guiding and discharging mechanism 18 at the corresponding positions. After being sequenced and discharged by the guiding and discharging mechanism 18, that is, the vibrating discs 17 convey the valve body components to the guiding rod 44, enter the feeding groove, and are guided and conveyed to the second limiting guiding plate 47 through the first limiting guiding plate 43. The valve body components are arranged on the second limiting guiding plate 47. Then the telescopic end of the electric push rod three 50 drives the pushing plate 49 to move. The pushing plate 49 drives the five pushing blocks thereon to move. The five pushing blocks push the five valve body components towards the discharging ports at the corresponding positions. When being pushed in, the end faces of the pushing blocks do not enter the discharging ports. Then the telescopic end of the electric push rod two 45 drives the ejecting plate 46 to move. The ejecting plate 46 drives the five ejecting blocks to move, jacking up the five valve body components for easy clamping;

[0119] The housing clamping mechanism 19 moves under the drive of the moving mechanism 21 at the corresponding position, that is, the telescopic end of the electric push rod four 52 drives the moving seat one 53 to move and slide on the moving frame 51. The moving seat one 53 drives the electric push rod five 54 thereon to move. The telescopic end of the electric push rod five 54 drives the moving seat two 55 to slide on the moving seat one 53, and clamps the five valve body lower shells 2 on the guiding and discharging mechanism 18 at the corresponding position. That is, the telescopic end of the electric push rod six 56 drives the fixing plate one 58 to move. The fixing plate one 58 drives the five clamping claws one 59 to move. The output shaft of the drive motor two 61 drives the transmission shaft one 60 to move. The transmission shaft one 60 drives the five clamping claws one 59 to move to complete the clamping. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to orderly discharge the five new valve body lower shells 2. At the same time, the housing clamping mechanism 19 drives the five valve body lower shells 2 to move to directly above the clamping seat 35 on the rotating table 24 and continues to move to place the five valve body lower shells 2 on the flipping and clamping mechanism 22. That is, the valve body lower shell 2 pushes the sliding seat 37 to move. The sliding seat 37 pushes the clamping spring. After the valve body lower shell 2 enters, under the action of the clamping spring, it is clamped between the sliding seat 37 and the fixed seat 38. After the clamping and placement are completed, it returns to directly above the corresponding guiding and discharging 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 flipping and clamping mechanism 22 and the five valve body lower shells 2 thereon to move to the position of the vertical clamping mechanism one 20. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the housing clamping mechanism 19 and repeats the clamping action of the housing clamping mechanism 19;

[0120] The vertical clamping mechanism one 20 moves under the drive of the moving mechanism 21 at the corresponding position and clamps the five flexible diaphragms 5 on the guiding and discharging mechanism 18 at the corresponding position. That is, the telescopic end of the electric push rod seven 62 drives the mounting support plate two 63 to slide on the fixing plate two 65. The mounting support plate two 63 drives the five clamping claws two 67 to move. The output shaft of the drive motor three 64 drives the transmission shaft two 66 to move. The transmission shaft two 66 drives the five clamping claws two 67 to move to complete the clamping action. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to orderly discharge the five new flexible diaphragms 5. At the same time, the vertical clamping mechanism one 20 drives the five flexible diaphragms 5 to move to directly above the flipping and clamping mechanism 22 where the valve body lower shell 2 has been placed and installs the five flexible diaphragms 5 into the corresponding valve body lower shells 2. After the installation and placement are completed, it returns to directly above the corresponding guiding and discharging mechanism 18, waiting for the next clamping and installation of the flexible diaphragms 5. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 to move to the position of the vertical clamping mechanism two. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the vertical clamping mechanism one 20 and repeats the clamping action of the vertical clamping mechanism one 20;

[0121] The second vertical clamping mechanism moves driven by the moving mechanism 21 at the corresponding position. The second vertical clamping mechanism clamps five welding gaskets 4 on the guiding and discharging mechanism 18 at the corresponding position. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to orderly discharge five new welding gaskets 4. At the same time, the second vertical clamping mechanism drives the five welding gaskets 4 to move above the flipping and clamping mechanism 22 where the flexible diaphragm 5 has been installed and placed, and installs the five welding gaskets 4 on the corresponding valve body lower shell 2. After the installation and placement are completed, it returns above the corresponding guiding and discharging mechanism 18, waiting for the next clamping and installation of the welding gaskets 4. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 to move to the position of the second shell clamping mechanism. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the second vertical clamping mechanism and repeats the clamping action of the second vertical clamping mechanism;

[0122] The second shell clamping mechanism moves driven by the moving mechanism 21 at the corresponding position. It clamps five valve body upper shells 1 on the guiding and discharging mechanism 18 at the corresponding position. After the clamping is completed, the guiding and discharging mechanism 18 at the corresponding position moves to orderly discharge five new valve body upper shells 1. At the same time, the second shell clamping mechanism drives the five valve body upper shells 1 to move above the flipping and clamping mechanism 22 where the welding gaskets 4 have been installed and placed, and continues to move to install the five valve body upper shells 1 on the valve body lower shell 2. After the installation is completed, it returns above the corresponding guiding and discharging mechanism 18, waiting for the next clamping of the valve body upper shells 1. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 and the assembled valve body on it to move to the position of the welding mechanism 23. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the second shell clamping mechanism and repeats the clamping action of the second shell clamping mechanism;

[0123] The welding mechanism 23 moves above the assembled valve body and welds the valve bodies together. That is, the electric lead screw part 68 starts, the lead screw slider 69 drives the base 70 and the five ultrasonic welders 71 on it to move, the welding head abuts against the valve body, and then starts welding. 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. Then it returns to the initial position, waiting for the next welding. At the same time, the rotating table 24 rotates to drive the flipping and clamping mechanism 22 and the welded valve body to move to the position of the vibrating feeding plate 72. The rotating table 24 pauses. At this time, one flipping and clamping mechanism 22 moves to the position of the welding mechanism 23 and repeats the welding action of the welding mechanism 23;

[0124] Subsequently, the flipping and clamping mechanism 22 moves, and the flipping and clamping mechanism 22 flips by a certain angle. That is, the telescopic end of the electric push rod 32 pushes the lifting plate, and the lifting plate pushes the flipping plate 39 and the clamping seat 35 thereon to flip. During the flipping process, the pulling plate 40 moves along the wedge-shaped guide plate 29 at the corresponding position away from the clamping seat 35. When moving, the pulling 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 flipping plate 39 returns to the initial position under the action of the two return springs 34. The welded valve body thereon leaves the flipping and clamping mechanism 22 and falls onto the vibrating feeding plate 72. The vibrating motor drives the vibrating feeding plate 72 to vibrate. After being detected by the vibrating feeding plate 72, it falls onto the conveyor 27 and is conveyed out;

[0125] Air tightness test, detect air tightness. Inject 0 - 5KPa compressed air through the upper shell air pipe 8, and the air intake is unobstructed; Inject 2KPa compressed air through the lower shell air pipe 12, and all components have no leakage for 5 seconds, meeting the design requirements;

[0126] Full inspection of products. For the products that pass the air tightness test, conduct appearance inspection and dimensional inspection. The qualified products are packaged and shipped.

[0127] This vacuum pressure retaining valve has a stable structure and good sealing performance, and can operate stably under different working conditions.

[0128] This production process has a high degree of automation, high production efficiency, and good product yield. The assembly and welding equipment adopted in this production process can perform batch assembly, welding, and product inspection output of the vacuum pressure retaining valve through automated operations such as sequencing and discharging, clamping and assembling in sequence, valve body welding, product flipping, and vibration detection output.

[0129] Through the cooperation of the vibrating disk 17 and the guiding and discharging mechanism 18 at the corresponding position, convey the valve body components and perform sequencing and discharging of the valve body components for easy clamping and assembling;

[0130] Through the cooperation of the moving mechanism 21 with the housing clamping mechanism 19, the vertical clamping mechanism 20, the housing clamping mechanism 2, and the vertical clamping mechanism 2, accurately and stably batch clamp and transport the valve body components to achieve batch assembly;

[0131] The welding mechanism 23 cooperates with the flipping and clamping mechanism 22 for batch welding, with high welding efficiency;

[0132] Through the flipping and clamping mechanism 22 flipping by a certain angle to loosen the clamping of the welded valve body, automatically output, and cooperate with the vibrating feeding plate 72 to achieve the preliminary detection of the welded valve body.

[0133] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A production process for a vacuum pressure-maintaining valve, 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 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 respectively connected to the output shaft of the vibrating guide plate (72) and 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) and four vibrating plates (17). , a welding mechanism (23), four guide and discharge mechanisms (18), four moving mechanisms (21), four vibrating disks (17), a welding mechanism (23), a vibrating guide plate (72), and four guide and discharge mechanisms (18) are all located outside the rotating table (24), and the moving mechanisms (21) and the vibrating disks (17) are alternately arranged, the positions of the four moving mechanisms (21), the welding mechanism (23), and the vibrating guide plate (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 vibrating disks (17) are all fixedly connected to the guide and discharge mechanisms (18), and a plurality of circumferentially evenly distributed flip clamping mechanisms (22) are hingedly connected to the rotating table (24); The rotating table (24) is provided with a supporting plate (28), and a plurality of turning openings (30) and a plurality of blocking grooves (31) are formed 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 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 side of the turning openings (30) at corresponding positions, and the wedge-shaped guide plates (29) are fan-shaped and hollow in the fan shape. 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).

2. The production process of a vacuum pressure-maintaining valve according to claim 1, 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.

3. The production process of a vacuum pressure-maintaining valve according to claim 2, 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).

4. The production process of a vacuum pressure-maintaining valve according to claim 3, 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); The vibrating material guide plate (72) is arranged in the mounting groove (25), and the end of the vibrating material guide plate (72) abuts against the bottom plate (26). The input shaft of the vibrating material guide plate (72) is drivingly connected to the output shaft of the driving motor 1 (3). The upper end of the vibrating material guide plate (72) is provided with a corrugated protrusion.

5. The production process of a vacuum pressure-maintaining valve according to claim 4, 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).

6. The production process of a vacuum pressure-maintaining valve according to claim 5, characterized in that: The vacuum pressure-maintaining valve comprises a valve body upper shell (1) and a valve body lower shell (2), and is 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) is respectively in contact with 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).

7. The production process of a vacuum pressure-maintaining valve according to claim 6, 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.

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