Filling leakage detection system for continuous blow-fill-seal integrated machine

Abstract

The present invention relates to the technical fields of pharmaceuticals and packaging devices. Disclosed is a filling leakage detection system for a continuous blow-fill-seal integrated machine. The filling leakage detection system comprises a plurality of filling needles (2) movably inserted through an extrusion die head (1); a jacket (3) is sleeved outside each filling needle (2), and a first channel (4) is formed between the jacket (3) and the filling needle (2); and the first channel (4) is connected to a manifold block (20), the manifold block (20) is connected to a sealed circuit (5), and the sealed circuit (5) is provided with a pressure measurement member (8) and a detection channel for gas charging and venting of the sealed circuit (5). The filling leakage detection system for the continuous blow-fill-seal integrated machine has the advantages of a simple structure and a convenient operation.

Description

A continuous blow-filling-seal integrated machine filling leakage detection system

[0001] Cross-reference to Related Applications

[0002] The present application is based on the Chinese patent application with the application date of "2024-09-20", the application number of "202422301970.7", and the invention name of "A continuous blow-filling-seal integrated machine filling leakage detection system", and claims its priority, the whole text of the Chinese patent application is incorporated into the present application as a part of the present application. TECHNICAL FIELD

[0003] The present application belongs to the technical field of pharmaceutical and packaging equipment, and particularly relates to a continuous blow-filling-seal integrated machine filling leakage detection system. BACKGROUND

[0004] The continuous blow-filling-seal integrated machine comprises a filling device, a mold device arranged below the filling device, and an extrusion die head for supplying a blank to the mold device, and a filling needle passes through the extrusion die head to fill the formed container. When filling, the filling needle needs to pass through the extrusion die head with high temperature. In order to avoid the influence of high temperature on the filling effect and product properties, a cooling system is needed to cool the filling needle. The cooling medium and the filling needle are very close. If there is leakage in the cooling system at the filling needle part, the cooling water enters the product area of the filling needle, which will contaminate the product and make the produced product not meet the requirements.

[0005] The existing leakage detection scheme is to verify whether there is leakage through pressure maintaining test, that is, after a gas is introduced into the filling needle cooling channel and pressure maintaining for a period of time, the value of the pressure detection piece is read, and whether there is leakage is judged by the change of the pressure detection piece data. However, because different products are filled, such as liquid, paste, suspension and the like, because the properties of the products are different, the cooling effect on the filling needle is different, the temperature has different influences on the pressure value and the pressure drop degree, and the pressure detection piece value results obtained by pressure maintaining test are different for different products, so it is impossible to judge whether there is leakage, and the leakage detection result cannot be verified. SUMMARY

[0006] The present application solves the technical problems of overcoming the deficiencies of the prior art, and provides a continuous blow-filling-seal integrated machine filling leakage detection system and method with simple structure and convenient operation.

[0007] To solve the above technical problems, the present application adopts the following technical scheme:

[0008] A continuous blow-filling-sealing integrated machine filling leakage detection system, comprising a plurality of filling needles movably arranged in an extrusion die, a jacket arranged outside the filling needles, a first channel formed between the jacket and the filling needles, a shunt seat connected to the first channel, a closed loop connected to the shunt seat, and a pressure detection member and a detection channel for inflating and deflating the closed loop arranged on the closed loop.

[0009] In some embodiments of the present application, the detection channel comprises a second channel and a third channel, the second channel is provided with a third valve and an air inlet, and the third channel is provided with a fourth valve and a leakage port.

[0010] In some embodiments of the present application, the closed loop is a heat exchange medium loop, the heat exchange medium loop is provided with a first valve and a second valve, and the heat exchange medium loop between the first valve and the second valve is connected to the pressure detection member, the first channel, the second channel and the third channel.

[0011] In some embodiments of the present application, the heat exchange medium loop is connected to a water tank at both ends, and a water pump is arranged on the heat exchange medium loop.

[0012] In some embodiments of the present application, a filter is arranged on the third channel.

[0013] In some embodiments of the present application, a throttle valve and a flow meter are arranged on the heat exchange medium loop, and the throttle valve is arranged between the water pump and the first channel.

[0014] In some embodiments of the present application, the shunt seat is connected to the closed loop through a hose.

[0015] In some embodiments of the present application, the leakage port has a pore size of 50 to 100 microns.

[0016] In some embodiments of the present application, a joint is arranged on the detection channel, and the joint is provided with a leakage port.

[0017] In some embodiments of the present application, the joint is detachably connected to the detection channel.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] The continuous blow-filling-sealing integrated machine filling leakage detection system of the present application inflates and deflates the closed loop through the detection channel connected to the closed loop, reads the value of the pressure detection member arranged on the closed loop, compares the pressure reduction value after inflation with the pressure reduction value after deflation, and determines whether the first channel and the shunt seat of the plurality of filling needles connected to the closed loop have leakage problems, thereby achieving simple structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a first structure schematic diagram of a filling leakage detection system of a continuous blow-filling-seal integrated machine according to the present application;

[0021] Fig. 2 is a second structure schematic diagram of a filling leakage detection system of a continuous blow-filling-seal integrated machine according to the present application;

[0022] Fig. 3 is a third structure schematic diagram of a filling leakage detection system of a continuous blow-filling-seal integrated machine according to the present application;

[0023] Fig. 4 is a sectional view of a filling device of a filling leakage detection system of a continuous blow-filling-seal integrated machine according to the present application;

[0024] Fig. 5 is an enlarged view of area A of Fig. 4;

[0025] Fig. 6 is a structure schematic diagram of a filling device of a filling leakage detection system of a continuous blow-filling-seal integrated machine according to the present application.

[0026] In the drawings, the reference signs of the present application are as follows: 1, extrusion die; 2, filling needle; 3, jacket; 4, first channel; 5, closed loop; 6, first valve; 7, second valve; 8, pressure detection piece; 9, second channel; 10, third channel; 11, third valve; 12, air inlet; 13, fourth valve; 14, leakage port; 15, water tank; 16, water pump; 17, filter; 18, throttle valve; 19, flow meter; 20, shunt seat; 21, hose; 22, filling seat; 23, air inlet seat; 24, sealing seat; 25, cooling medium inlet pipe; 26, cooling medium outlet pipe. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0028] As shown in Figs. 4 to 6, the filling needle mechanism of the continuous blow-filling-seal integrated machine comprises, from top to bottom, a filling seat 22, a shunt seat 20, an air inlet seat 23 and a sealing seat 24, the shunt seat 20 is provided with a cooling medium inlet pipe 25 and a cooling medium outlet pipe 26 for inputting cooling medium into the first channel 4 to cool the filling needle 2 and outputting the cooling medium to realize heat exchange. When the continuous blow-filling-seal integrated machine is running, the filling seat 22 transports products to the inside of the tube blank through the filling needle 2, the air inlet seat 23 transports sterile gas to the inside of the tube blank, the air inlet seat 23 is lifted in the sealing seat 24 to drive the filling needle 2 to be lifted in the extrusion die 1, and a mold (not shown in the drawing) forms the tube blank into a container and seals the liquid of the filling needle 2 in the container.

[0029] As shown in FIG. 1 to FIG. 3, a continuous blow-filling-sealing integrated machine filling leakage detection system comprises a plurality of filling needles 2 movably arranged in an extrusion die 1, a jacket 3 is arranged outside the filling needles 2, a first channel 4 is formed between the jacket 3 and the filling needles 2, the first channel 4 is connected to a flow distribution seat 20, the flow distribution seat 20 is connected to a closed loop 5, the closed loop 5 is provided with a pressure detection piece 8 and a detection channel for inflating and deflating the closed loop 5, the detection channel comprises a second channel 9 and a third channel 10, the second channel 9 is provided with a third valve 11 and an air inlet 12, the third channel 10 is provided with a fourth valve 13 and a leakage port 14, the second channel 9 and the third channel 10 can be respectively connected to the closed loop 5, or the second channel 9 is connected to the third channel 10, and then the third channel 10 is connected to the closed loop 5.

[0030] The closed loop 5 is a heat exchange medium loop, the heat exchange medium loop is provided with a first valve 6 and a second valve 7, the heat exchange medium loop between the first valve 6 and the second valve 7 is connected to the pressure detection piece 8, the first channel 4, the second channel 9 and the third channel 10, both ends of the heat exchange medium loop are connected to a water tank 15, the heat exchange medium loop is provided with a water pump 16 for inputting cooling water to the first channel 4 to cool the filling needles 2, the third channel 10 is provided with a filter 17 for filtering gas to prevent the leaked gas from polluting the environment, the heat exchange medium loop is provided with a throttle valve 18 and a flow meter 19 for controlling the flow of cooling water in the first channel 4, the throttle valve 18 is arranged between the water pump 16 and the first channel 4, and the inflating and deflating detection is performed on the original heat exchange medium loop, which is convenient for connection and can detect the leakage of the heat exchange medium loop. When leakage detection is needed, the first valve 6 and the second valve 7 need to be closed first, and then inflation and deflation are performed.

[0031] The flow distribution seat 20 is connected to the closed loop 5 through a hose 21, and the hose 21 is convenient for disassembly and assembly.

[0032] The aperture of the leakage port 14 is 50 to 100 microns, which can more obviously show the pressure degradation condition and is convenient for comparison.

[0033] The detection channel is provided with a connector, and the leakage port 14 is arranged on the connector, which is convenient for machining the leakage port 14 on the connector.

[0034] The connector is detachably connected to the detection channel, and the inflation and deflation can share the same pipeline by disassembling and assembling the connector. First, the closed loop 5 is inflated through the detection channel, then the valve is closed to maintain pressure and record the value, then the connector with the leakage port 14 is assembled to the detection channel, and the valve is opened to deflate and record the value.

[0035] This embodiment of a continuous blow-fill-seal integrated machine filling leakage detection method employs a continuous blow-fill-seal integrated machine filling leakage detection device, and includes the following steps:

[0036] Step 1: Adjust the temperature of the extrusion die 1 to ensure that the extrusion die 1 is either heated and closed or heated and maintained at a stable temperature. When the extrusion die 1 is heated and closed, the temperature should be below 30 degrees Celsius, preferably 22 degrees Celsius. When the extrusion die 1 is heated and open, the temperature should be stable at 105 degrees Celsius. This completes the environmental preparation for leak detection.

[0037] Step 2: Inject gas and read the value of pressure detection device 8 in closed circuit 5 as the first value. After waiting for the set time, read the value of pressure detection device 8 as the second value.

[0038] Step 3: Release the gas injected into the channel, then inject gas and read the pressure detection value of the pressure sensor 8 as the third value. Release the gas through the leak port 14 to the sealed circuit 5, wait for the set time, and then read the pressure detection value as the fourth value.

[0039] Step 4: Compare the difference 'a' between the first and second values ​​in Step 2 and the difference 'b' between the third and fourth values ​​in Step 3 to determine whether there is a leak in the closed circuit 5.

[0040] Determining whether there is a leak in the sealed circuit 5 includes the following steps: Determine whether the difference b is less than the difference a. If so, the sealed circuit 5 has a leak hole with the same or similar size as the leak outlet 14; otherwise, it does not exist.

[0041] Specifically, when the temperature of the extrusion die 1 is 22 degrees Celsius, leakage detection is performed on the heat exchange medium circuit, the flow divider 20, and the first channel 4. In step 2, the difference between the first value read by the injected gas and the second value read after waiting 10 minutes is 0 to 0.005 bar. In step 3, the difference between the third value read by the injected gas and the fourth value read after waiting 10 minutes varies depending on the aperture of the leak port 14. When the aperture is 50 micrometers, the difference is 0.247 to 0.152 bar; when the aperture is 100 micrometers, the difference is 0.507 to 0.654 bar. The pressure drop value in step 3 with the leak port 14 is much greater than the pressure drop value in step 2 without the leak port 14. This indicates that the first channel 4 of the filling needle 2, the flow divider 20, and the sealed circuit 5 do not have a leak port 14 greater than or equal to 50 micrometers, thus realizing the detection and verification of leakage during filling of the continuous blow-fill-seal machine.

[0042] Although the present application has been described in connection with the preferred embodiment thereof with reference to the drawings, it is not to be limited to the details described therein but can be modified in various ways which will be apparent to one of ordinary skill in the art without departing from the scope of the present application as defined by the appended claims.

Claims

1. A continuous blow-fill-seal machine filling leakage detection system, characterized in that, The application relates to a continuous blow-filling-sealing integrated machine filling leakage detection system which comprises a plurality of movable filling needles (2) arranged in an extrusion die (1), a jacket (3) arranged outside the filling needles (2), a first channel (4) formed between the jacket (3) and the filling needles (2), a shunt seat (20) connected with the first channel (4), a closed loop (5) connected with the shunt seat (20), and a pressure detection element (8) and a detection channel for inflating and deflating the closed loop (5) arranged on the closed loop (5).

2. The filling leak detection system of the continuous blow-fill-seal machine according to claim 1, wherein, The detection channel comprises a second channel (9) and a third channel (10), the second channel (9) is provided with a third valve (11) and an air inlet (12), and the third channel (10) is provided with a fourth valve (13) and a leakage port (14).

3. The filling leak detection system of the continuous blow-fill-seal machine according to claim 2, wherein, The closed loop (5) is a heat exchange medium loop, the heat exchange medium loop is provided with a first valve (6) and a second valve (7), and the heat exchange medium loop between the first valve (6) and the second valve (7) is connected with the pressure detection element (8), the first channel (4), the second channel (9) and the third channel (10).

4. The filling leak detection system of the continuous blow-fill-seal machine according to claim 3, wherein, The heat exchange medium loop is connected with a water tank (15) at two ends, and a water pump (16) is arranged on the heat exchange medium loop.

5. The filling leak detection system of the continuous blow-fill-seal machine according to claim 2, wherein, A filter (17) is arranged on the third channel (10).

6. The filling leak detection system of the continuous blow-fill-seal machine according to claim 3, wherein, A throttle valve (18) and a flowmeter (19) are arranged on the heat exchange medium loop, and the throttle valve (18) is arranged between the water pump (16) and the first channel (4).

7. The system for detecting filling leakage of a continuous blow-fill-seal machine according to claim 1, wherein The shunt seat (20) is connected with the closed loop (5) through a hose (21).

8. The filling leak detection system of the continuous blow-fill-seal machine according to claim 2, wherein, The leakage port (14) has a hole diameter of 50-100 microns.

9. The system for detecting a filling leakage of a continuous blow-fill-seal machine according to claim 1, wherein A joint is arranged on the detection channel, the joint is provided with the leakage port (14), and the joint is detachably connected with the detection channel.

10. A method for detecting filling leakage of a continuous blow-fill-seal machine, characterized in that, The application further discloses a continuous blow-filling-sealing integrated machine filling leakage detection method comprising the following steps: When the temperature of the extrusion die is stable, gas is injected into the closed loop (5), a first value of the pressure detection element (8) is read, a second value of the pressure detection element (8) is read after a set time, and a difference between the first value and the second value is obtained; The gas in the closed loop (5) is discharged, gas is re-injected, a third value of the pressure detection element (8) of the closed loop (5) is read, the closed loop (5) is deflated by assembling the leakage port (14), a fourth value of the pressure detection element (8) is read after a set time, and a difference between the third value and the fourth value is obtained; The two differences are compared to determine whether the closed loop (5) has leakage.

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