Membrane feeding device for membrane type gas meter

Abstract

The utility model discloses a membrane type fuel gas surface membrane feeding device which comprises a long-strip-shaped bearing platform, the upper surface of the bearing platform is horizontal, and the width of the bearing platform is smaller than that of a membrane belt; a cutting area is arranged in the middle of the bearing platform; the quantitative transfer mechanism is arranged at the head end of the bearing platform, and the moving direction of the moving end of the quantitative transfer mechanism is parallel to the length direction of the bearing platform; the rear tightening control mechanism is arranged at the rear end of the bearing platform; the moving direction of the moving end is parallel to the length direction of the bearing platform; the cutting area is located between the quantitative transferring mechanism and the back tightening control mechanism. And the two flattening mechanisms are respectively arranged on the quantitative transfer mechanism and the back tightening control mechanism. According to the utility model, in the feeding and cutting process, the tension smoothness of a film belt is kept, the cutting quality is ensured, meanwhile, due to high-precision positioning feeding, the cut film can be directly used without subsequent shaping treatment, the treatment process of fine trimming and shaping is reduced, the cost is reduced, and the production efficiency is improved at the same time.

Description

Technical Field

[0001] The utility model relates to the field of gas meter diaphragm cutting, in particular to a diaphragm feeding device for diaphragm gas meters. Background Art

[0002] A diaphragm gas meter is a metering device for measuring gas usage. The working principle of a diaphragm gas meter is mainly based on the volumetric method, that is, cumulative metering is carried out by measuring the gas volume flow rate. Its working process is as follows: When gas enters the gas meter, a pressure difference is generated at both ends of the gas meter inlet and outlet. This pressure difference pushes the diaphragm to reciprocate in the metering chamber, and at the same time drives the gas distribution mechanism to coordinate gas distribution. Each reciprocating movement of the diaphragm discharges a certain amount of gas. When the roller rotates through a counting unit, a roller rotation metering display is realized, thereby realizing the cumulative metering of gas. In addition, the driving force for the diaphragm movement depends on the gas pressure difference at the inlet and outlet of the gas meter. When the diaphragm is moved to the extreme position on one side, another diaphragm is required to generate the same driving force to drive the first diaphragm to return, realizing continuous automatic metering.

[0003] Therefore, the diaphragm in the diaphragm gas meter is a very important component, and its manufacturing process includes processes such as film belt cutting and diaphragm vulcanization. The cutting of the film belt requires stretching the film belt and cutting it according to a given length, followed by vulcanization and shaping. Due to the high elasticity of the film belt, during the cutting process, if the tension of the film belt is not in place, it is easy to cause deformation of the cut diaphragm. At the same time, due to the elastic characteristics of the diaphragm, the dimensional accuracy of the cut diaphragm is not high, and its shape needs to be processed separately during the post-vulcanization shaping process. Summary of the Utility Model

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a diaphragm feeding device for diaphragm gas meters, which keeps the film belt stretched and flat during the feeding and cutting process, ensures the cutting quality, and at the same time, the high-precision positioning feeding enables the cut diaphragm to be directly used without subsequent shaping treatment, reducing the fine repair and shaping treatment process, reducing costs and improving production efficiency.

[0005] The purpose of the present utility model is achieved through the following technical solutions:

[0006] A diaphragm feeding device for diaphragm gas meters, comprising:

[0007] A bearing platform, which is strip-shaped and has a horizontal upper surface. The width of the bearing platform is smaller than the width of the film belt; a cutting area is provided in the middle of the bearing platform;

[0008] A quantitative transfer mechanism, which is arranged at the head end of the bearing platform, and the moving direction of its moving end is parallel to the length direction of the bearing platform;

[0009] The rear tension control mechanism is arranged at the rear end of the bearing platform; the moving direction of its moving end is parallel to the length direction of the bearing platform; the cutting area is located between the quantitative transfer mechanism and the rear tension control mechanism;

[0010] Two flattening mechanisms are respectively arranged on the quantitative transfer mechanism and the rear tension control mechanism; the flattening mechanism on the quantitative transfer mechanism fixes and flattens the head end of the film belt; the flattening mechanism on the rear tension control mechanism flattens the middle part of the film belt and fixes it on the bearing platform.

[0011] Further, the flattening mechanism located on the quantitative transfer mechanism includes:

[0012] The flattening plate is arranged on the moving end of the quantitative transfer mechanism;

[0013] At least one flattening slide rail is horizontally arranged on the flattening plate; the axis of the flattening slide rail is perpendicular to the length direction of the bearing platform;

[0014] The lead screw has threaded parts with opposite thread directions at both ends; the lead screw is arranged on the flattening plate parallel to the flattening slide rail;

[0015] The servo motor is arranged on the flattening plate and is connected to one end of the lead screw;

[0016] Two clamping mechanisms are respectively slidably connected to the horizontal slide rail and are threadedly connected to the two threaded parts of the lead screw; the clamping mechanisms move away from or close to each other under the forward or reverse rotation of the servo motor.

[0017] Further, the servo motor is connected to the end face of the lead screw through a coaxially arranged tension torsion spring.

[0018] Further, the clamping mechanism includes:

[0019] The jaw cylinder is provided with a clamping chute matching the flattening slide rail and a threaded hole matching the threaded part on the lead screw;

[0020] Two clamping plates are respectively connected to the two moving parts of the jaw cylinder; the length direction of the clamping plates is parallel to the length direction of the bearing platform; the lower clamping surfaces of the two clamping plates are flush with the surface of the bearing platform under the control of the jaw cylinder.

[0021] Further, it further includes an end pressing mechanism, and the end pressing mechanism includes:

[0022] Two end pressing cylinders are vertically arranged on the flattening plate and are located at the front end of the flattening slide rail;

[0023] The end pressing plate is connected to the telescopic ends of the two end pressing cylinders; the lower surface of the end pressing plate is parallel to the upper surface of the bearing platform.

[0024] Further, the end pressing mechanism further includes:

[0025] Two pressure-bearing cylinders are arranged on the tension plate and are located directly below the end pressure plate;

[0026] A pressure plate connected to two pressure cylinders, wherein the upper plate surface of the pressure plate is parallel to the upper surface of the support platform; the width of the extrusion surface of the pressure plate and the end pressure plate is greater than the width of the membrane strip;

[0027] The area corresponding to the pressure-bearing cylinder and the pressure-bearing plate on the back tension control mechanism of the support platform is provided with a notch for displacement of the pressure-bearing cylinder and the pressure-bearing plate.

[0028] Furthermore, it also includes a top pressing and fixing device, which is located upstream of the cutting area on the platform; the top pressing and fixing device includes:

[0029] The top pressure cylinder is set vertically downward;

[0030] The top pressure plate is connected to the telescopic end of the top pressure cylinder, and its lower plate surface is parallel to the upper surface of the support platform; the width of the top pressure plate is greater than the width of the support platform.

[0031] Furthermore, the rear tension control mechanism is a screw rod translation structure; the servo motor of the rear tension control mechanism is also connected to its screw rod through a rear tension torsion spring.

[0032] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0033] 1. The quantitative moving mechanism can quantitatively transfer the film tape to the cutting station after each cutting, and carry out quantitative cutting to ensure that there will be no large deviation in the cutting size each time, and the precise cutting amount can be ensured by the back tension control mechanism and the flattening mechanism.

[0034] 2. The rear tension control device can apply longitudinal pulling force to the film to be cut to ensure that it is stretched flat in the longitudinal direction. The film strip is stretched horizontally through the tensioning mechanism. In this way, the entire film to be cut is stressed in the horizontal two-dimensional direction, so that it is stretched flat, providing a basis for accurate cutting.

[0035] 3. The pedestal serves as a receiving platform for the movement of the diaphragm. At the same time, it provides support for the longitudinal gravity of the diaphragm during the tensioning process, reducing and avoiding the deformation and stress of the diaphragm due to gravity.

[0036] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings of the present utility model are as follows:

[0038] Figure 1 It is a schematic top view (after hiding the bearing platform) structure diagram of the membrane type gas skin membrane feeding device in the embodiment.

[0039] Figure 2 It is Figure 1 the schematic structure diagram at the A-A section in

[0040] Figure 3 It is Figure 1 the schematic structure diagram at the B-B section in

[0041] Figure 4 It is a schematic top view structure diagram of the flattening mechanism after hiding the bearing platform in the embodiment.

[0042] Figure 5 It is a schematic top view structure diagram of the membrane type gas skin membrane feeding device in the embodiment.

[0043] In the figure: 1. Bearing platform; 11. Cutting area; 2. Quantitative transfer mechanism; 3. Rear tension control mechanism; 31. Rear tension torsion spring; 4. Flattening mechanism; 41. Flattening plate; 42. Flattening slide rail; 43. Lead screw; 431. Thread part; 44. Servo motor; 451. Claw cylinder; 452. Clamping plate; 46. Tension torsion spring; 47. End pressure cylinder; 48. End pressure plate; 49. Bearing pressure cylinder; 50. Bearing pressure plate; 61. Top pressure cylinder; 62. Top pressure plate. Specific embodiments

[0044] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0045] Embodiment:

[0046] As Figures 1 to 5 shown, a membrane type gas skin membrane feeding device includes:

[0047] A bearing platform 1, which is strip-shaped and has a horizontal upper surface, and the width of the bearing platform 1 is smaller than the width of the film strip; a cutting area 11 is provided in the middle of the bearing platform 1;

[0048] A quantitative transfer mechanism 2, which is arranged at the head end of the bearing platform 1, and the moving direction of its moving end is parallel to the length direction of the bearing platform 1;

[0049] A rear tension control mechanism 3, which is arranged at the rear end of the bearing platform 1; the moving direction of its moving end is parallel to the length direction of the bearing platform 1; the cutting area 11 is located between the quantitative transfer mechanism 2 and the rear tension control mechanism 3;

[0050] Two flattening mechanisms, which are respectively arranged on the quantitative transfer mechanism 2 and the rear tension control mechanism 3; the flattening mechanism on the quantitative transfer mechanism 2 fixes and flattens the head end of the film; the flattening mechanism on the rear tension control mechanism 3 flattens and fixes the middle part of the film on the bearing platform 1.

[0051] Through the quantitative moving mechanism, the film strip can be quantitatively transferred to the cutting station after each cutting, and quantitative cutting can be carried out to ensure that there will be no large deviation in the cutting size each time, and the precise cutting amount can be ensured through the back-stretching control mechanism and the flattening mechanism. The back-stretching control device can apply a longitudinal pulling force to the film to be cut to ensure that it is stretched flat in the longitudinal direction, and the film strip is stretched and stressed in the transverse direction through the flattening mechanism, so that the entire film to be cut is stressed in the horizontal two-dimensional direction, so that it is stretched flat, providing a basis for precise cutting. The support platform 1 serves as a receiving platform for the movement of the film, and at the same time provides support for the gravity of the film in the longitudinal direction during the tensioning process, reducing and avoiding deformation and stress of the film due to gravity.

[0052] In this embodiment, the leveling mechanism located on the quantitative transfer mechanism 2 includes:

[0053] A flat plate 41 is provided on the moving end of the quantitative transfer mechanism 2;

[0054] Two flat rails 42 are horizontally arranged on the flat plate 41; the axis of the flat rails 42 is perpendicular to the length direction of the support platform 1;

[0055] The screw rod 43 has threaded parts 431 with opposite thread directions at both ends; the screw rod 43 is arranged on the flat plate 41 in parallel with the flat rail 42;

[0056] A servo motor 44 is disposed on the flat plate 41 and connected to one end of the screw rod 43;

[0057] The two clamping mechanisms are respectively slidably connected to the horizontal slide rail and are threadedly connected to the two threaded portions 431 of the screw rod 43 ; the clamping mechanisms move away from or closer to each other under the forward or reverse rotation of the servo motor 44 .

[0058] The movement of the clamping mechanism is achieved by displacement of the screw rod 43 , and two threaded portions 431 in opposite directions are provided in the screw rod 43 to control the separation and approach of the two clamping mechanisms, thereby pulling the film strip apart laterally.

[0059] In this embodiment, the servo motor 44 is connected to the end surface of the screw rod 43 through a tension torsion spring 46 coaxially arranged thereon.

[0060] Since the membrane tape is elastic and in order to prevent the membrane tape from being pulled apart with excessive force, a tensioning torsion spring 46, i.e., an ordinary torsion spring, is designed so that the torsion spring can transfer the accumulated torque of the servo motor 44 to the screw rod 43, so that the two supporting mechanisms on the screw rod 43 have a certain separation force, thereby ensuring that the membrane tape is tensioned without being torn.

[0061] In this embodiment, the clamping mechanism includes:

[0062] The jaw cylinder 451 is provided with a clamping chute matching the smooth tensioning rail 42 and a threaded hole matching the threaded part 431 on the lead screw 43;

[0063] Two clamping plates 452 are respectively connected to two moving parts of the jaw cylinder 451; the length direction of the clamping plate 452 is parallel to the length direction of the bearing platform 1; the lower clamping surfaces of the two clamping plates 452 are flush with the surface of the bearing platform 1 under the control of the jaw cylinder 451.

[0064] The clamping plate 452 can evenly distribute the clamping force over a larger area, achieving a better tensioning effect and reducing the waves formed due to uneven tension.

[0065] In this embodiment, it further includes an end pressing mechanism, and the end pressing mechanism includes:

[0066] Two end pressing cylinders 47 are vertically arranged on the tensioning plate 41 and are located at the front end of the smooth tensioning rail 42;

[0067] An end pressing plate 48 is connected to the telescopic ends of the two end pressing cylinders 47; the lower surface of the end pressing plate 48 is parallel to the upper surface of the bearing platform 1.

[0068] The end pressing mechanism further includes:

[0069] Two pressure-bearing cylinders 49 are arranged on the tensioning plate 41 and are located directly below the end pressing plate 48;

[0070] A pressure-bearing plate 50 is connected to the two pressure-bearing cylinders 49, and the upper plate surface of the pressure-bearing plate 50 is parallel to the upper surface of the bearing platform 1; the widths of the pressing surfaces of the pressure-bearing plate 50 and the end pressing plate 48 are greater than the width of the film strip.

[0071] The rear tensioning mechanism may not be provided with the pressure-bearing cylinders 49 and the pressure-bearing plate 50, and the film strip can be directly pressed on the bearing platform 1 through the end pressing cylinders 47 and the end pressing plate 48, or the bearing platform 1 can be set to be disconnected here to provide space for the pressure-bearing cylinders 49 and the pressure-bearing plate 50.

[0072] The end of the film strip can be fixed through the pressure-bearing plate 50 and the end pressing plate 48, and in this way, in cooperation with the rear tensioning control mechanism 3, the film strip can be tensioned in the length direction.

[0073] In this embodiment, it further includes a top pressing and fixing device, and the top pressing and fixing device is located upstream of the cutting area 11 on the bearing platform 1; the top pressing and fixing device includes:

[0074] A top pressing cylinder 61 is vertically arranged downward;

[0075] A top pressing plate 62 is connected to the telescopic end of the top pressing cylinder 61, and its lower plate surface is parallel to the upper surface of the bearing platform 1; the width of the top pressing plate 62 is greater than the width of the bearing platform 1.

[0076] After cutting, when the film belt at the rear of the cutting area 11 is stretched and fixed at its end by the flattening mechanism on the quantitative transfer mechanism 2, it will undergo deformation displacement under the elastic force of the film belt, resulting in uneven force when the flattening mechanism on the subsequent quantitative transfer mechanism 2 grabs and fixes it, and factors such as changes in the pressing area cause the film belt to form waves. Setting the top pressing plate 62 can limit it to a certain extent before cutting, and then release it after being clamped by the flattening mechanism on the quantitative transfer mechanism 2.

[0077] In this embodiment, the rear tension control mechanism 3 is a translation structure of the lead screw 43; the servo motor 44 of the rear tension control mechanism 3 is also connected to its lead screw 43 through the rear tension torsion spring 31.

[0078] The force of the rear tension is accumulated through the torsion spring of the rear tension torsion spring 31, so as to apply a longitudinal force to the film belt.

[0079] In this embodiment, the membrane type gas skin membrane feeding device works as follows. First, the film belt is successively pulled onto the bearing plate 50 and the top pressing plate 62 of the flattening mechanism of the quantitative transfer mechanism 2. Then, control the two flattening mechanisms to work, tighten the side end faces, the head end and the tail end of the film belt, and then control the top pressing cylinder 61 to extend to fix the film belt behind the cutting area 11.

[0080] After cutting, other equipment removes the cut film pieces. At the same time, control the forging cylinder and the bearing cylinder 49 to shorten, expand the gap between the bearing plate 50 and the end pressing plate 48, and ensure that the bearing platform 1 can pass through the gap smoothly. Then control the quantitative transfer mechanism 2 to move so that the flattening mechanism on it comes to the end of the cut film belt, control the clamping jaw cylinder 451 to clamp, clamp the two ends of the film belt, and then control the top pressing cylinder 61 to extend to release the control of the film belt. At the same time, also control the flattening mechanism on the rear tension control mechanism 3 to release the control of the film belt.

[0081] Control the quantitative transfer mechanism 2 to transport, pull the film belt forward. After pulling in place, control the end pressing cylinder 47 and the bearing cylinder 49 to extend to clamp and fix the end face of the film belt. At the same time, control the servo motor 44 on the flattening mechanism of the quantitative transfer mechanism 2 to work, control the two clamping jaw cylinders 451 to separate, and tighten the film piece. Similarly, for the rear tension control mechanism, also operate in the same way to tension and tighten both sides of the film belt, and then control its corresponding end pressing cylinder 47 and bearing cylinder 49 to work to fix the rear part of the film belt. Then control the servo motor 44 of the rear tension control mechanism 3 to work to slightly tighten the film belt backward.

[0082] Finally, control the top pressing cylinder 61 to extend, and then cut. After cutting is completed, repeat the above operations to complete continuous feeding.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A membrane type gas surface membrane feeding device, characterized in that: include: The support platform is in the shape of a long strip, with a horizontal upper surface, and the width of the support platform is smaller than the width of the membrane strip; a cutting area is provided in the middle of the support platform; The quantitative transfer mechanism is arranged at the head end of the support platform, and the moving direction of the moving end thereof is parallel to the length direction of the support platform; The rear stretch control mechanism is arranged at the rear end of the support platform; the moving direction of its moving end is parallel to the length direction of the support platform; the cutting area is located between the quantitative transfer mechanism and the rear stretch control mechanism; Two stretching mechanisms are respectively arranged on the quantitative transfer mechanism and the rear stretching control mechanism; the stretching mechanism on the quantitative transfer mechanism fixes and stretches the head end of the film strip; the stretching mechanism on the rear stretching control mechanism stretches and flattens the middle part of the film strip and fixes it on the support platform.

2. The membrane type gas surface membrane feeding device according to claim 1 is characterized in that: The leveling mechanism located on the quantitative transfer mechanism includes: A flat plate, arranged on the moving end of the quantitative transfer mechanism; At least one flat rail is horizontally arranged on the flat plate; the axis of the flat rail is perpendicular to the length direction of the support platform; The screw rod has threaded parts with opposite thread directions at both ends; the screw rod is arranged on the flat plate in parallel with the flat rail; A servo motor is arranged on a flat plate and connected to one end of a lead screw; The two clamping mechanisms are respectively connected in sliding manner to the horizontal slide rail and are threadedly connected to the two threaded parts of the lead screw; the clamping mechanisms move away from or close to each other under the forward or reverse rotation of the servo motor.

3. The membrane type gas surface membrane feeding device according to claim 2 is characterized in that: The servo motor is connected to the end face of the lead screw through a coaxially arranged tension torsion spring.

4. The membrane type gas surface membrane feeding device according to claim 2 is characterized in that: The clamping mechanism comprises: The clamping claw cylinder is provided with a clamping groove matching with the tensioning smooth rail and a threaded hole matching with the threaded part on the screw rod; Two clamping plates are respectively connected with two moving parts of the clamping claw cylinder; the length direction of the clamping plates is parallel to the length direction of the supporting platform; under the control of the clamping claw cylinder, the lower clamping surfaces of the two clamping plates are flush with the surface of the supporting platform.

5. The membrane type gas surface membrane feeding device according to claim 2 is characterized in that: It also includes an end pressure mechanism, the end pressure mechanism includes: Two end pressure cylinders are vertically arranged on the flat plate and located at the front end of the flat slide rail; The end pressure plate is connected to the telescopic ends of the two end pressure cylinders; the lower surface of the end pressure plate is parallel to the upper surface of the support platform.

6. The membrane type gas surface membrane feeding device according to claim 5 is characterized in that: The end pressure mechanism also includes: Two pressure-bearing cylinders are arranged on the tension plate and are located directly below the end pressure plate; A pressure plate connected to two pressure cylinders, wherein the upper plate surface of the pressure plate is parallel to the upper surface of the support platform; the width of the extrusion surface of the pressure plate and the end pressure plate is greater than the width of the membrane strip; The area corresponding to the pressure-bearing cylinder and the pressure-bearing plate on the back tension control mechanism of the support platform is provided with a notch for displacement of the pressure-bearing cylinder and the pressure-bearing plate.

7. The membrane type gas surface membrane feeding device according to claim 5, characterized in that: It also includes a top pressing and fixing device, which is located upstream of the cutting area on the platform; the top pressing and fixing device includes: The top pressure cylinder is set vertically downward; The top pressure plate is connected to the telescopic end of the top pressure cylinder, and its lower plate surface is parallel to the upper surface of the support platform; the width of the top pressure plate is greater than the width of the support platform.

8. The membrane type gas surface membrane feeding device according to claim 1 is characterized in that: The rear tension control mechanism is a screw rod translation structure; the servo motor of the rear tension control mechanism is also connected to its screw rod through a rear tension torsion spring.

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