Filter element integrity testing device

Abstract

The utility model provides a filter element integrity testing device. The filter element integrity testing device comprises a rack, a clamping assembly and a rotating assembly, wherein the clamping assembly and the rotating assembly are arranged on the rack; a liquid storage tank suitable for placing a filter element is arranged on the rack; the clamping assembly is used for clamping a filter element located in the liquid storage tank, the rotating assembly is located at one end of the liquid storage tank and comprises a motor and a rotating shaft driven by the motor to rotate, and the output end of the rotating shaft is in transmission connection with the filter element and used for driving the filter element to rotate in the liquid storage tank; the rotating shaft is a hollow shaft internally provided with an air inlet channel, one end of the air inlet channel is communicated with a filter element cavity in the filter element, the other end of the air inlet channel is communicated with an air supply pipeline, and a pressure regulating valve is arranged on the air supply pipeline. The clamping assembly and the rotating assembly are connected to the liquid storage tank, so that the connection stability of the filter element and the reliability of a test result are ensured. And the test effect of the filter element is improved through the connection of the pressure regulating valve, and the labor investment is reduced.

Description

Technical Field

[0001] The utility model relates to the field of filter element testing, and particularly relates to a filter element integrity testing device. Background Art

[0002] A filter element is a porous element that actually performs the filtering function during filtration. Usually, after the production and processing of the filter element are completed, an integrity test needs to be carried out on the filter element. In the field of filter elements, the role of the integrity test is to test the performance of the filter element. As the requirements for the performance of filter elements in various industries are getting higher and higher, the requirements for the integrity test of filter elements are also getting higher and higher. The filter element requires a more efficient, safe, and reliable integrity testing device to ensure the quality of the filter element.

[0003] The bubble point test is a test based on the physical phenomenon of capillary pressure. After the porous membrane material is completely wetted by the corresponding wetting liquid, due to the action of the surface tension and capillary tension of the liquid, the wetting liquid fills the membrane pores and stays in the pores. A certain pressure is applied on one side of the filter layer. When the pressure reaches a certain level, the gas overcomes the capillary tension and surface tension in the membrane pores to generate bubbles. At this time, the pressure value is the bubble point value. The larger the bubble point value, the higher the precision of the product, and vice versa. The calculation formula for the bubble point value is as follows: P = 4kγcosθ / d. Where: p = the pressure difference when the specific filter pores will open; k = the shape correction coefficient of the largest filter pores; γ = the surface tension of the wetting liquid; θ = the contact (wetting) angle between the liquid and the filter membrane; d = the pore diameter of the filter membrane.

[0004] Existing filter elements usually use the principle of the bubble point test for integrity testing, and the pressure range of the filter bubble point is tested through an integrity tester. However, in the prior art, usually, the filter element is manually placed into the test tank and fully soaked with the wetting liquid, and then the soaked filter element is manually placed into the sealing fixture to test the bubble point, which has the problems of cumbersome steps, low efficiency, and low automation. Summary of the Utility Model

[0005] Aiming at the problem of low working efficiency of manual operation in the prior art, the utility model provides a filter element integrity testing device. By connecting a clamping component and a rotating component on the liquid storage tank, the connection stability of the filter element and the reliability of the test result are ensured. And by connecting a pressure regulating valve, the test effect of the filter element is improved, and the manual input is reduced.

[0006] To solve the above technical problems, the technical solution of the utility model is as follows:

[0007] A filter element integrity testing device includes a frame, a clamping assembly and a rotating assembly arranged on the frame; a liquid storage tank adapted to place the filter element is provided on the frame; the clamping assembly is used to clamp the filter element located in the liquid storage tank, the rotating assembly is located at one end of the liquid storage tank, the rotating assembly includes a motor and a rotating shaft driven by the motor to rotate, and the output end of the rotating shaft is in transmission connection with the filter element and is used to drive the filter element to rotate in the liquid storage tank; the rotating shaft is a hollow shaft with an air inlet channel inside, one end of the air inlet channel is communicated with the filter element cavity inside the filter element, and the other end of the air inlet channel is communicated with a gas supply pipe, and a pressure regulating valve is provided on the gas supply pipe.

[0008] Further, a pressure gauge for indicating the pressure magnitude in the gas supply pipe is also provided on the gas supply pipe.

[0009] Further, one end of the rotating shaft extending into the liquid storage tank is connected with a chuck, and a plurality of jaws for clamping and fixing the filter element are provided on the chuck.

[0010] Further, a boss is fixed on one side of the frame, the boss is located at one end of the liquid storage tank, the motor is fixed on the boss, a vertical bearing seat is fixed on the boss, and the rotating shaft is installed on the vertical bearing seat through a bearing.

[0011] Further, the clamping assembly includes a fastener, a seal and a cylinder; the seal is arranged in the liquid storage tank, two parallel chutes are provided on the frame on both sides of the liquid storage tank, and the seal is fixed on the liquid storage tank through the fastener; a silica gel disc is provided on one side of the seal close to the filter element, and the output shaft of the cylinder passes through the seal and is connected with the silica gel disc, and the cylinder is used to drive the silica gel disc to move along the length direction of the liquid storage tank so that the seal clamps the filter element.

[0012] Further, a buffer tank communicated with the liquid storage tank is also provided on the frame.

[0013] Further, the pressure range of the pressure gauge is 0 - 25Kpa.

[0014] Further, an exhaust assembly is arranged above the liquid storage tank, and the air suction port of the exhaust assembly faces the liquid storage tank.

[0015] Further, the pressure regulating valve is an electric control pressure regulating valve or a manual pressure regulating valve.

[0016] Further, a sealing strip is arranged around the outer circle of the seal, and the sealing strip is fixedly arranged on the seal and is in close contact with the inner wall surface of the liquid storage tank.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The present invention provides a filter element integrity testing device. By arranging a liquid storage tank for placing the filter element on a frame, after the filter element is placed in the liquid storage tank, it can sink below the liquid level in the liquid storage tank. At the same time, through the cooperation of a clamping assembly and a rotating assembly on the frame, clamping and rotation of the filter element in the liquid storage tank are achieved. By setting the rotating shaft of the rotating assembly as a hollow shaft with an air inlet channel inside, the air inlet channel is communicated with the filter element cavity inside the filter element, and the gas provided by the air supply pipeline can enter the filter element cavity inside the filter element through the air inlet channel. By observing the bubbling situation on the surface of the filter element, the automation of the filter element integrity test is realized, and the automation degree of the filter element integrity testing device is improved. In addition, the setting of a pressure regulating valve on the air supply pipeline enables the stable adjustment of the air supply pressure magnitude. This filter element integrity testing device can conduct tests within a pressure range of 0 - 25 KPa, overcoming the problem in the prior art that the integrity testing device cannot conduct a bubbling test at a pressure less than 20 kPa. The filter element sets the liquid storage tank, the clamping assembly, and the rotating assembly on the same frame, which is convenient for operation through an integrated structure, reduces the manual participation rate, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of a filter element integrity testing device provided by the present utility model.

[0021] Description of the reference numerals: 1. Liquid storage tank; 2. Pressure gauge; 3. Pressure regulating valve; 40. Motor; 41. Chuck; 42. Rotating shaft; 50. Boss; 51. Belt vertical bearing; 60. Fastener; 61. Fixed rod; 62. Card slot; 63. Cylinder; 64. Sealing member; 65. Silicone disc; 70. Buffer tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all of them. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0025] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1:

[0027] As Figure 1 shown, the present utility model provides a filter element integrity testing device, which includes a frame, a liquid storage tank 1, a clamping assembly, and a rotating assembly. The liquid storage tank 1 is arranged on the top of the frame, and the inside of the liquid storage tank 1 is used to place the filter element; the clamping assembly is arranged inside the liquid storage tank 1, the rotating assembly is arranged at one end of the liquid storage tank 1, the output end of the rotating assembly and the clamping position of the clamping assembly are both located inside the liquid storage tank 1, the clamping assembly clamps one end of the filter element, the output end of the rotating assembly is connected to the other end of the filter element, the clamping assembly and the rotating assembly cooperate to clamp the filter element, and the rotating assembly is used to drive the filter element to rotate around its own axis.

[0028] In this embodiment, the liquid storage tank 1 is a long cylindrical cavity. The rotating assembly includes a motor 40 and a rotating shaft 42. The input end of the rotating shaft 42 is connected to the motor 40, and the output end of the rotating shaft 42 is connected to the filter element. The motor 40 drives the filter element to rotate through the rotating shaft 42; the rotating shaft 42 is arranged as a hollow shaft, and the internal channel of the hollow shaft provides an air inlet channel for the filter element. The output end of the hollow shaft is connected to the filter element cavity inside the filter element. One end of the hollow shaft is connected to the filter element through the air inlet channel, and the other end of the hollow shaft is provided with a gas supply channel, and a pressure regulating valve 3 is arranged on the gas supply channel. External air enters the filter element cavity inside the filter element through the gas supply channel and the air inlet channel of the hollow shaft, realizing the gas supply for the filter element test. The pressure regulating valve 3 can control the air flow parameters, including controlling the air flow pressure and the pressurization rate, ensuring the uniform pressurization effect and improving the automation performance. A pressure gauge 2 for indicating the pressure inside the gas supply pipeline is also arranged on the gas supply pipeline, and the pressure detection during the filter element test is realized through the pressure gauge.

[0029] For the filter element integrity test device provided by the present utility model, by arranging the rotating shaft of the rotating assembly as a hollow shaft with an air inlet channel inside, the air inlet channel is communicated with the filter element cavity inside the filter element, and the gas provided by the gas supply pipeline can enter the filter element cavity inside the filter element through the air inlet channel. By observing the bubbling situation on the surface of the filter element, the automation of the filter element integrity test is realized, and the automation degree of the filter element integrity test device is improved. In addition, the liquid storage tank 1, the clamping assembly and the rotating assembly are arranged on the same frame, which is convenient for operation through an integrated structure, reduces the manual participation rate, and improves the test efficiency.

[0030] In this embodiment, one end of the rotating shaft 42 extending into the liquid storage tank 1 is connected with a chuck 41. A plurality of jaws are arranged on the chuck 41, and the stable clamping of the filter element is realized through the jaws. The chuck 41 adopts a three-jaw chuck; the three-jaw chuck can realize the automatic clamping of the filter element. When the filter element integrity test device is started, the motor 40 is automatically started to drive the filter element to rotate and soak automatically through the rotating shaft 42 and the chuck 41.

[0031] In this embodiment, a boss 50 is arranged on one side of the frame. The boss 50 is arranged below the rotating shaft 42 and is fixedly connected to the frame. The input end of the rotating shaft 42 is connected to the motor 40; the motor 40 is fixedly arranged on the boss 50, and a vertical bearing seat 51 is arranged on the boss 50, and the rotating shaft 42 is connected through the vertical bearing seat 51. By the setting method of fixing the motor 40 and the rotating shaft 42 on the boss 50 on one side of the frame, the overall structure of the filter element integrity test device is more compact, which is convenient for the unified operation of the test device, shortens the operation time and thus improves the work efficiency, and at the same time realizes the integrated test effect.

[0032] In this embodiment, the clamping assembly includes a fastener 60, a seal 64 and a cylinder 63. The clamping assembly is installed on the frame. Slots 62 are provided on both sides of the frame arranged along the axis direction of the filter element. The two slots 62 are parallel to each other. One end of the fastener 60 is arranged in the slot 62, and the other end of the fastener 60 extends out of the slot 62 and is connected to the seal 64. A cylinder 63 is arranged on the side of the seal 64 away from the filter element. A silica gel disc 65 is provided on the side of the seal 64 close to the filter element. The output shaft of the cylinder 63 passes through the seal 64 and is connected to the silica gel disc 65. When the cylinder 63 is started, the silica gel disc 65 moves in the axial direction of the liquid storage tank 1. The seal 64 is fixed on the liquid storage tank 1 through the fastener 60.

[0033] In this embodiment, the cooperation between the fastener 60 and the seal 64 and the slot 62 facilitates the disassembly of the seal 64. Specifically, the clamping assembly is connected through the cooperation between the slot 62 and the fastener 60 to achieve the clamping effect on the filter element at different positions in the liquid storage tank 1. The silica gel disc 65 provides a stable point for the position setting of the filter element, effectively ensuring the test effect of the integrity test device. When the filter element integrity test device is started, the cylinder 63 can automatically drive the silica gel disc 65 to slide to clamp one end of the filter element.

[0034] In this embodiment, the fastener 60 is connected to the seal 64 through a fixing rod 61. The seal 64 is arranged inside the liquid storage tank 1. A sealing strip is provided around the outer circle of the seal 64. The sealing strip is fixedly arranged on the seal 64 and is in close contact with the inner wall surface of the liquid storage tank 1. The sealing strip is selected as an elastic member. In this embodiment, the sealing strip is made of silica gel. The sealing effect on both sides of the seal 64 is achieved by manually sleeving it around the outer circle of the seal 64. The cross-sectional sizes and shapes of the seal 64 and the liquid storage tank 1 are the same. The seal 64 ensures the sealing effect at the end of the filter element.

[0035] In this embodiment, a silica gel disc 65 is provided on the side of the seal 64 close to the rotating assembly. The silica gel disc 65 is connected to the output end of the cylinder 63. The shape of the silica gel disc 65 is a circular bowl-shaped structure, which realizes buffering for clamping the filter element.

[0036] In this embodiment, a buffer tank 70 is further arranged inside the frame. One end of the liquid storage tank 1 is provided with a liquid inlet, and the liquid inlets of the buffer tank 70 and the liquid storage tank 1 are communicated. The liquid is transported to the liquid storage tank 1 through the buffer tank 70 to test the filter element; isopropyl alcohol is used as the liquid. A recovery tank is also arranged inside the frame. The recovery tank is connected to the liquid outlet of the liquid storage tank 1. Through the arrangement of connecting the liquid storage tank 1 to the recovery tank, the liquid is transported to the recovery tank after the test is completed. The arrangement of the recovery tank can realize the multiple recycling of the liquid. When the filter element integrity testing device is started, the liquid can be automatically transported from the buffer tank 70 to the liquid storage tank 1. After the filter element integrity testing device is completed, the liquid in the liquid storage tank 1 can automatically flow back to the buffer tank 70, improving the automation degree of the device.

[0037] In this embodiment, the pressure regulating valve 3 selects the model SMC-IR3020-04BG-A, and the pressure regulating range of the pressure regulating valve 3 is 0-25 Kpa; the pressure regulating valve 3 can uniformly regulate the air supply pressure within the pressure range of 0-25 Kpa, and the pressurizing regulation rate can be set. With such a setting, the filter element can be subjected to a bubble point test within the pressure range of 0-25 KPa, overcoming the problem in the prior art that the bubble point of the filter element cannot be tested at a pressure less than 20 kPa; the integrity data of the filter element bubble point test can be obtained, and the performance of the filter element can be better evaluated.

[0038] In this embodiment, an exhaust component is arranged above the liquid storage tank 1, and the air suction port of the exhaust component faces the liquid storage tank 1. By arranging the exhaust component above the liquid storage tank, when the test liquid for detecting the filter element has an odor, arranging the exhaust component above the liquid storage tank can reduce air pollution and ensure the safety of the working environment.

[0039] In this embodiment, the pressure regulating valve 3 is an electric control pressure regulating valve or a manual pressure regulating valve. The rotating component and the clamping component are electrically connected to realize the adjustment of different filter elements, input the wetting liquid, end the collection of the wetting liquid and record the pore diameter value of the filter element, effectively reducing the manual participation rate and improving the production efficiency.

[0040] In this embodiment, another branch pipe is connected to the input end of the rotating shaft 42. The other branch pipe is set as a backflush air inlet pipe, and the air inlet pressure range of the backflush air inlet pipe is 15000 kpa-20000 kpa. The backflush effect is realized through the setting of the backflush air inlet pipe. When the test is completed, the test environment is cleaned through backflush.

[0041] A filter element integrity testing device provided in this embodiment, during actual use, after the filter element integrity testing device is powered on and ventilated, it is turned on. The filter element is set in the liquid storage tank 1. Only by pressing one button, the liquid can be automatically input into the liquid storage tank 1, and the clamping assembly automatically clamps the filter element. When the liquid level in the liquid storage tank 1 submerges the filter element and the distance from the highest point of the filter element is 13 mm, the automatic liquid infusion stops; the rotating assembly automatically drives the filter element to rotate, and the filter element is fully wetted; the pressure regulating valve 3 automatically and slowly pressurizes at a constant speed or manually pressurizes by setting a pressure value, and observes whether there are continuous bubbles in strings generated by the filter element. After finding continuous bubbles in strings, press the button and automatically record the pressure value. This kind of filter element integrity testing device can realize the full automation of the filter element testing process with only one-key operation, has a high degree of automation, effectively reduces the manual participation rate, and improves the filter element integrity testing efficiency.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0043] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. Based on the above description, other different forms of changes or modifications can also be made. It is not necessary and impossible to enumerate all embodiments here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A filter element integrity testing device, characterized in that: The invention comprises a frame and a clamping assembly and a rotating assembly arranged on the frame; the frame is provided with a liquid storage tank (1) suitable for placing a filter element; the clamping assembly is used to clamp the filter element located in the liquid storage tank (1); the rotating assembly is located at one end of the liquid storage tank (1); the rotating assembly comprises a motor (40) and a rotating shaft (42) driven to rotate by the motor (40); the output end of the rotating shaft (42) is transmission-connected to the filter element and is used to drive the filter element to rotate in the liquid storage tank (1); the rotating shaft (42) is a hollow shaft having an air intake channel inside, one end of the air intake channel is connected to the filter element cavity inside the filter element, the other end of the air intake channel is connected to an air supply pipeline, and a pressure regulating valve (3) is provided on the air supply pipeline.

2. A filter element integrity testing device according to claim 1, characterized in that: The air supply pipeline is also provided with a pressure gauge (2) for indicating the pressure in the air supply pipeline.

3. A filter element integrity testing device according to claim 1, characterized in that: One end of the rotating shaft (42) extending into the liquid storage tank (1) is connected to a chuck (41), and the chuck (41) is provided with a plurality of claws for clamping and fixing the filter element.

4. A filter element integrity testing device according to claim 1, characterized in that: A boss (50) is fixed on one side of the frame, the boss (50) is located at one end of the liquid storage tank (1), the motor (40) is fixed on the boss (50), a vertical bearing seat (51) is fixed on the boss (50), and the rotating shaft (42) is mounted on the vertical bearing seat (51) via a bearing.

5. A filter element integrity testing device according to claim 1, characterized in that: The clamping assembly comprises a fastener (60), a sealing member (64) and a cylinder (63); the sealing member (64) is arranged in the liquid storage tank (1); the frame is provided with two mutually parallel clamping grooves (62) located on both sides of the liquid storage tank (1); the sealing member (64) is fixed to the liquid storage tank (1) through the fastener (60); a silicone plate (65) is provided on the side of the sealing member (64) close to the filter element; the output shaft of the cylinder (63) passes through the sealing member (64) and is connected to the silicone plate (65); the cylinder (63) is used to drive the silicone plate (65) to move along the length direction of the liquid storage tank (1) so that the sealing member (64) clamps the filter element.

6. A filter element integrity testing device according to claim 1, characterized in that: The frame is also provided with a buffer tank (70) which is in communication with the liquid storage tank (1).

7. A filter element integrity testing device according to claim 2, characterized in that: The pressure range of the pressure gauge (2) is 0-25Kpa.

8. A filter element integrity testing device according to claim 1, characterized in that: An exhaust component is arranged above the liquid storage tank (1), and an air suction port of the exhaust component faces the liquid storage tank (1).

9. A filter element integrity testing device according to claim 1, characterized in that: The pressure regulating valve (3) is an electrically controlled pressure regulating valve or a manual pressure regulating valve.

10. A filter element integrity testing device according to claim 5, characterized in that: The outer ring of the sealing member (64) is surrounded by a sealing strip, which is fixedly arranged on the sealing member (64) and is in close contact with the inner wall surface of the liquid storage tank (1).

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