Differential pressure control system for washing, filling and sealing linkage production line

Abstract

The pressure difference control system comprises an air inlet pipe, two air outlet pipes, an air return pipe and a control assembly, the air inlet pipe is communicated with a plant, the two air outlet pipes are communicated with a bottle washing machine and a tunnel drying oven in the plant respectively, the air outlet pipes penetrate out of the plant, the air return pipe is communicated with the plant, and the control assembly is arranged in the plant. The air return pipe is used for sending excessive air in a plant back into an air conditioning system used for generating air, the control assembly comprises a variable air volume valve and a control valve, the variable air volume valve is arranged on the air return pipe, and the control valve is arranged on the air return pipe and used for controlling the variable air volume valve. The method has the effect of reducing the pressure difference fluctuation in the room in the washing and drying stage of the production line.

Description

Technical Field

[0001] The present application relates to the field of differential pressure control systems, and in particular to a differential pressure control system for a washing, filling and sealing linkage production line. Background Art

[0002] In the pharmaceutical production process, the production line of vials or ampoules uses a washing, drying, filling, and sealing (or capping) linkage line. During the washing and drying stages, the bottle washing machine and tunnel oven discharge heat and moisture, take clean air from the room, and circulate it to the outside. Due to the discontinuous operation of the equipment, the pressure difference in the room and the operation of the air conditioning system cause large fluctuations, which in turn affect the stability of production. The usual practice is to start and stop the equipment and the corresponding associated fans at the same time, and switch the return air branch duct to match the air volume in the room. That is, when the equipment and exhaust fan are running, the electric air valve on the corresponding return air branch duct is closed and exhausts to the outside; conversely, when the equipment and exhaust fan are stopped, the electric air valve on the return air branch duct opens and returns air to the original air conditioning system; due to the frequent return and exhaust actions, in a system using a purely manual regulating valve, the pressure difference in the room will fluctuate greatly, and there is a high risk of stable operation of the system. Utility Model Content

[0003] In order to reduce the pressure difference fluctuation in the room during the washing and drying stage of the production line, the present application provides a pressure difference control system for a washing, filling and sealing linkage production line.

[0004] The present application provides a pressure difference control system for a washing, filling and sealing linkage production line, which adopts the following technical solution:

[0005] A pressure difference control system for a washing, filling and sealing linkage production line, comprising an air inlet duct, two air outlet ducts, a return air duct and a control component, wherein the air inlet duct is connected to a factory building, the two air outlet ducts are respectively connected to a bottle washing machine and a tunnel oven in the factory building, the air outlet duct passes through the factory building, the return air duct is connected to the factory building, the return air duct is used to send excess air in the factory building back to an air conditioning system for generating air, the control component comprises a variable air volume valve and a control valve, the variable air volume valve is arranged on the return air duct, the control valve is arranged on the return air duct, and the control valve is used to control the variable air volume valve.

[0006] By adopting the above technical solution, the return air duct conveys the newly generated air from the air-conditioning system into the factory building. The bottle washing machine and the tunnel drying oven both need to take air from the factory building during operation to ensure the stable operation of the equipment. The bottle washing machine and the tunnel drying oven will discharge the used air out of the factory building. Since the air from the air-conditioning system not only provides air for the bottle washing machine and the tunnel drying oven, but also needs to ensure the stability of the temperature and humidity in the factory building, the air volume of the air-conditioning system entering the factory building is much larger than the air volume taken by the bottle washing machine and the tunnel drying oven. The excess air volume will enter the air-conditioning system again through the return air duct, reducing energy consumption. The return air will bring the heat in the factory building and maintain the humidity in the factory building at the same time. In actual production, the working hours of the bottle washing machine and the tunnel oven are different. The bottle washing machine needs to work with the tunnel oven first and then pause with the tunnel oven. Therefore, there are three different air intake states in the factory. The first is that the bottle washing machine takes air alone, the second is that the bottle washing machine and the tunnel oven take air at the same time, and the third is that the tunnel oven takes air. Since the air volume required by the bottle washing machine and the tunnel oven is certain, when the air volume entering the air inlet pipe remains unchanged, according to different conditions, the electric regulating valve can control the variable air volume valve to change the size of the air volume, thereby controlling the return air volume of the factory, keeping the temperature in the factory stable, and reducing the pressure difference fluctuation in the room during the washing and drying stage of the production line.

[0007] Optionally, a retaining assembly is provided on both the air inlet pipe and the air outlet pipe, and the retaining assembly includes a constant air volume valve and a regulating valve, the constant air volume valve is provided on the corresponding pipeline, the regulating valve is provided on the corresponding pipeline, and the regulating valve is used to control the constant air volume valve.

[0008] By adopting the above technical scheme, since the air outlet in the factory will change with the air intake status in the factory, the change of the air intake status will affect the instantaneous air volume of the air inlet duct and the air outlet duct. The constant air volume valve can ensure that the air volume of the air inlet duct and the air outlet duct remains stable, thereby improving the stability of the equipment on the production line and the production quality of the product. The regulating valve can adjust the constant air volume valve, so that the constant air volume valve can be applied to equipment production lines of different models, thereby improving the scope of application of the control system.

[0009] Optionally, a filter assembly for filtering impurities is provided at the connection point between the air inlet pipe and the factory building, and the filter assembly includes a filter box, a frame, a filter screen and a seal. The filter box is set on the factory building, the filter box is opened, the filter screen is set on the frame, the frame is slidably connected in the filter box, and the seal is used to seal the opening of the filter box.

[0010] By adopting the above technical solution, the filter component reduces the amount of impurities in the air-conditioning system that enter the factory building. When the impurities in the air system move toward the factory building with the wind in the air inlet pipe, the impurities enter the filter box and are blocked by the filter net. When the staff needs to centrally process the impurities, the staff can first control the regulating valve corresponding to the air inlet pipe, and the regulating valve will close the constant air volume valve. Then the staff will slide the frame out of the opening of the filter box, process the impurities on the filter net, and then slide the frame into the filter box. The opening of the filter box is sealed by the sealing component, and then the constant air volume valve is opened by the regulating valve. The filter component has a simple structure and is easy for the staff to operate.

[0011] Optionally, the seal includes a sealing plate, a sealing rod and a sealing spring, the sealing plate is arranged on the frame, the sealing plate is used to abut the side wall of the filter box and seal the bayonet of the filter box, the sealing rod is slidably connected to the side wall of the filter box, the sealing rod passes through the filter box, the side wall of the frame is provided with a snap-in groove, and the sealing spring is used to keep one end of the sealing rod snap-in in the snap-in groove.

[0012] By adopting the above technical solution, after the staff clears the impurities on the filter screen, the staff slides the frame into the filter box until the sealing plate abuts against the outer wall of the filter box. The sealing plate seals the bayonet of the filter box until the sealing rod abuts against the bayonet groove under the action of the sealing spring. The sealing structure is simple and easy for the staff to operate.

[0013] Optionally, the sealing rod is provided with a guiding inclined surface for guiding the sealing rod to move away from the frame.

[0014] By adopting the above technical solution, when the staff slides the frame in the filter box, the frame will abut against the guide slope, and the guide slope will drive the sealing rod to slide in the direction away from the frame and connect to the filter box. When the sealing rod moves, the elastic potential energy of the sealing spring gradually increases until one end of the sealing rod is facing the snap-in groove, and the elastic potential energy of the sealing spring is released, and the sealing rod is snapped into the snap-in groove.

[0015] Optionally, a louver return air assembly is provided at the connection between the return air duct and the factory building, and the louver return air assembly includes a return air frame and a plurality of louver rods. The return air frame is provided on the factory building, the return air frame is connected to the return air duct, and the plurality of louver rods are evenly distributed on the return air frame, and the louver rods are provided on the return air frame.

[0016] By adopting the above technical solution, since the return air volume of the return air duct is large, the wind in the factory is likely to produce whistling when entering the return air duct, affecting the staff in the factory. The louver return air assembly is used to reduce the whistling sound generated when the return air is returned. The louver rod has a small resistance to the airflow, a large sound absorption capacity, and an aesthetic effect.

[0017] Optionally, the cross-section of the louver rod along the length direction is in a broken line shape, and a sound-absorbing layer is provided on the louver rod.

[0018] By adopting the above technical solution, the broken line shape is used to improve the structural strength of the louver rod and reduce the vibration of the louver rod when the wind moves at high speed on the edge of the louver rod, and the sound-absorbing layer is used to further absorb the whistling sound generated by the return air.

[0019] Optionally, the louver rod is provided with reinforcing ribs.

[0020] By adopting the above technical solution, the reinforcing ribs further improve the strength of the shutter rod.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The control component is used to control the return air volume, so that the return air duct can adapt to the return air in the factory under different working conditions, reducing the pressure difference fluctuation in the room during the washing and drying stage of the production line;

[0023] 2. The filter assembly is used to filter impurities entering the pipe and reduce the amount of impurities entering the plant;

[0024] 3. The louver return air assembly is used to reduce the whistling sound in the factory during return air. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a pressure difference control system used in washing, filling and sealing linkage production lines.

[0026] Figure 2 It is an exploded view of the filter assembly, used to show the matching relationship between the frame and the filter box.

[0027] Figure 3 yes Figure 2 The enlarged view of point A in the middle is used to show the structure of the seal.

[0028] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle louver return air assembly.

[0029] Figure 5 yes Figure 4 Schematic diagram of the structure of the middle louver rod.

[0030] Figure numerals: 1. air inlet duct; 2. air outlet duct; 3. return air duct; 4. control assembly; 41. variable air volume valve; 42. control valve; 5. holding assembly; 51. constant air volume valve; 52. regulating valve; 53. manual closed regulating valve; 6. filter assembly; 61. filter box; 611. guide groove; 612. sealing groove; 62. frame; 621. snap-in groove; 63. filter net; 64. seal; 641. sealing plate; 642. sealing rod; 643. sealing spring; 644. sealing ring; 645. abutment sheet; 646. guide slope; 65. handle; 7. louver return air assembly; 71. return air frame; 72. louver rod; 73. reinforcing rib; 74. sound-absorbing cotton. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] The present application embodiment discloses a pressure difference control system for a washing, filling and sealing linkage production line. Figure 1 A pressure difference control system for a washing, filling and sealing linkage production line includes an air inlet pipe 1, two air outlet pipes 2, a return air pipe 3, a control component 4, three holding components 5, a filter component 6 and a louver return air component 7. The filter component 6 is arranged on the upper end surface of the factory building, one end of the air inlet pipe 1 is arranged on the filter component 6, the filter component 6 filters the wind in the air inlet pipe 1 and passes it into the factory building, a bottle washing machine and a tunnel oven are arranged in the factory building, two air outlet pipes 2 correspond to the bottle washing machine and the tunnel oven respectively, one end of the air outlet pipe 2 is fixedly arranged on the corresponding equipment, the air outlet pipe 2 runs through the factory building, the louver return air component 7 is arranged on the side wall of the factory building, the return air pipe 3 is connected with the louver return air component 7, and the return air pipe 3 is used to send excess air in the factory building back to the air conditioning system.

[0033] Reference Figure 1 The three retaining components 5 correspond to the two air outlet pipes 2 and the air inlet pipe 1 respectively. The retaining components 5 include a constant air volume valve 51 and a regulating valve 52. The constant air volume valve 51 is fixedly arranged on the corresponding pipeline, and the regulating valve 52 is fixedly arranged on the corresponding pipeline. The constant air volume valve 51 is a pressure-independent constant air volume valve 51, and the regulating valve 52 is an electric closed regulating valve 52. The regulating valve 52 is used to control the corresponding constant air volume valve 51. Manual closed regulating valves 53 are arranged on the two air outlet pipes 2.

[0034] Reference Figure 1 and Figure 2The filter assembly 6 includes a filter box 61, a frame 62, a filter screen 63 and a seal 64. The filter box 61 is fixedly arranged on the upper end surface of the factory building. The air inlet pipe 1 is connected to the upper end surface of the filter box 61. The side wall of the filter box 61 is opened. Guide grooves 611 are opened on two opposite side walls of the filter box 61. The length direction of the guide grooves 611 is parallel to the length direction of the filter box 61. The frame 62 is horizontally arranged, and the frame 62 is slidably connected in the guide grooves 611. The filter screen 63 is horizontally arranged, and the filter screen 63 is arranged on the frame 62.

[0035] Reference Figure 2 and Figure 3 The sealing member 64 includes a sealing plate 641, a sealing rod 642, a sealing spring 643, a sealing ring 644 and an abutting piece 645. The sealing plate 641 is vertically arranged, and the sealing plate 641 is fixedly arranged on one end of the frame 62. The sealing ring 644 is fixedly arranged on the sealing plate 641. The side wall of the filter box 61 is provided with an opening and a sealing groove 612 is provided. The sealing groove 612 is used to clamp the sealing ring 644. The side wall of the frame 62 along the length direction of the frame 62 is provided with a clamping groove 621. The clamping groove 621 extends along the width direction of the frame 62. The length direction of the sealing rod 642 is parallel to the width direction of the filter box 61. The sealing rod 642 is slidably connected to the side wall of the filter box 61, the abutment sheet 645 is vertically arranged, and the abutment sheet 645 is fixedly arranged on the end of the sealing rod 642 away from the frame 62, the sealing spring 643 is sleeved on the sealing rod 642, one end of the sealing spring 643 is fixedly arranged on the outer wall of the filter box 61, and the other end of the sealing spring 643 is fixedly arranged on the abutment sheet 645, a guide slope 646 is provided between the end of the sealing rod 642 facing the clamping groove 621 and the side wall of the sealing rod 642 facing the sealing plate 641, and a handle 65 is fixedly arranged on the end of the sealing plate 641 away from the frame 62.

[0036] Reference Figure 4 and Figure 5 The louver return air assembly 7 includes a return air frame 71 and a plurality of louver rods 72. The return air frame 71 is fixedly arranged on the side wall of the factory building. The plurality of louver rods 72 are evenly distributed along the length direction of the return air frame 71. The louver rod 72 is vertically arranged. The louver rod 72 is fixedly arranged on the return air frame 71. The cross-section of the louver rod 72 along the vertical direction is a broken line shape. The louver rod 72 is provided with a plurality of reinforcing ribs 73 along the length direction of the louver rod 72. The reinforcing ribs 73 are horizontally arranged. The plurality of reinforcing ribs 73 are evenly distributed along the vertical direction. The reinforcing ribs 73 are fixedly arranged on the louver rod 72. Sound-absorbing cotton 74 is fixedly arranged on the louver rod 72.

[0037] Reference Figure 1 and Figure 4One end of the return air duct 3 is fixedly arranged on the return air frame 71, and the return air duct 3 is connected to the inside of the factory building. The control component 4 includes a variable air volume valve 41 and a control valve 42. The variable air volume valve 41 is fixedly arranged on the return air duct 3, and the control valve 42 is fixedly arranged on the return air duct 3. The control valve 42 is an electric closed regulating valve 52. The variable air volume valve 41 is a pressure-independent variable air volume valve 41. The control valve 42 is used to control the variable air volume valve 41.

[0038] The implementation principle of a pressure difference control system for a washing, filling and sealing linkage production line in an embodiment of the present application is as follows: during the operation of the production line, since the air volumes required by the bottle washing machine and the tunnel oven are different and the working hours may vary, three working states are provided for alternating conversion, the first being the bottle washing machine working alone, the second being the bottle washing machine and the tunnel oven working simultaneously, and the third being the tunnel oven working alone. Since the air volume of the air inlet pipe 1 remains unchanged under the control of the quantitative air valve, and the heat required by the bottle washing machine and the tunnel oven remains unchanged, when changing the working state, the control valve 42 controls the return air volume of the variable air volume valve 41 to change. By changing the return air volume, the pressure difference change inside the factory building is greatly reduced, and the operating stability of the air conditioning system is reduced. The louver return air structure reduces the whistling sound generated during the return air process and reduces the discomfort of the factory workers. The filter component 6 is used to isolate impurities in the air inlet pipe 1, thereby reducing the pollution of the factory building caused by impurities entering the factory building through the air inlet pipe 1.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pressure difference control system for a washing, filling and sealing linkage production line, characterized in that: The invention comprises an air inlet pipe (1), two air outlet pipes (2), a return air pipe (3) and a control component (4), wherein the air inlet pipe (1) is connected to a factory building, the two air outlet pipes (2) are respectively connected to a bottle washing machine and a tunnel oven in the factory building, the air outlet pipe (2) passes through the factory building, the return air pipe (3) is connected to the factory building, the return air pipe (3) is used to send excess air in the factory building back to an air conditioning system for generating air, and the control component (4) comprises a variable air volume valve (41) and a control valve (42), the variable air volume valve (41) is arranged on the return air pipe (3), the control valve (42) is arranged on the return air pipe (3), and the control valve (42) is used to control the variable air volume valve (41).

2. A pressure difference control system for a washing, filling and sealing linkage production line according to claim 1, characterized in that: The air inlet pipe (1) and the air outlet pipe (2) are both provided with a retaining assembly (5), the retaining assembly (5) comprising a constant air volume valve (51) and a regulating valve (52), the constant air volume valve (51) being provided on a corresponding pipe, the regulating valve (52) being provided on a corresponding pipe, the regulating valve (52) being used to control the constant air volume valve (51).

3. A pressure difference control system for a washing, filling and sealing linkage production line according to claim 1, characterized in that: A filter assembly (6) for filtering impurities is provided at the connection point between the air inlet pipe (1) and the factory building. The filter assembly (6) comprises a filter box (61), a frame (62), a filter screen (63) and a sealing member (64). The filter box (61) is provided on the factory building. The filter box (61) is provided with an opening. The filter screen (63) is provided on the frame (62). The frame (62) is slidably connected inside the filter box (61). The sealing member (64) is used to seal the opening of the filter box (61).

4. A pressure difference control system for a washing, filling and sealing linkage production line according to claim 3, characterized in that: The sealing member (64) comprises a sealing plate (641), a sealing rod (642) and a sealing spring (643); the sealing plate (641) is arranged on the frame (62); the sealing plate (641) is used to abut against the side wall of the filter box (61) and block the bayonet of the filter box (61); the sealing rod (642) is slidably connected to the side wall of the filter box (61); the sealing rod (642) passes through the filter box (61); a clamping groove (621) is provided on the side wall of the frame (62); and the sealing spring (643) is used to keep one end of the sealing rod (642) clamped in the clamping groove (621).

5. A pressure difference control system for a washing, filling and sealing linkage production line according to claim 4, characterized in that: The sealing rod (642) is provided with a guiding inclined surface (646) for facilitating the sealing rod (642) to move in a direction away from the frame (62).

6. The pressure difference control system for a washing, filling and sealing linkage production line according to claim 1, characterized in that: A shutter return air assembly (7) is provided at the connection between the return air duct (3) and the factory building. The shutter return air assembly (7) comprises a return air frame (71) and a plurality of shutter rods (72). The return air frame (71) is provided on the factory building. The return air frame (71) is connected to the return air duct (3). The plurality of shutter rods (72) are evenly distributed on the return air frame (71). The shutter rods (72) are provided on the return air frame (71).

7. A pressure difference control system for a washing, filling and sealing linkage production line according to claim 6, characterized in that: The cross section of the louver rod (72) along the length direction is in a broken line shape, and a sound absorbing layer is provided on the louver rod (72).

8. A pressure difference control system for a washing, filling and sealing linkage production line according to claim 7, characterized in that: The shutter rod (72) is provided with a reinforcing rib (73).

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