Suction force testing device applied to electromagnetic valve

Abstract

The utility model relates to the technical field of medical instrument detection, in particular to an electromagnetic valve suction force detection device, which comprises a fixed frame arranged on a horizontal test bench surface, a lifting cylinder fixedly arranged at the upper end of the fixed frame, a balancing weight and an electronic scale sequentially arranged below the lifting cylinder, the balancing weight is arranged on the electronic scale, and the electronic scale is arranged at the lower part of the fixed frame; the stroke end of the lifting cylinder extends downwards and is provided with an upper fixing mechanism, the upper end of the balancing weight is provided with a lower fixing mechanism located under the upper fixing mechanism, and the upper fixing mechanism and the lower fixing mechanism are used for fixing the upper end and the lower end of the electromagnetic valve respectively. According to the electromagnetic valve suction force detection device, errors caused by human participation in the detection process are reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device testing technology, specifically to a device for testing the pull-in force of electromagnetic valves. Background Technology

[0002] The solenoid valve is a key component of the blood component separator. Its function is to work with the monitoring unit and consumables to control the flow of blood, and to cooperate with other components to complete the blood circulation and separation process within the equipment according to the separator's programmed settings. The solenoid valve contacts the membrane layer of the separator's monitoring unit; outside the membrane layer is flowing blood. The opening and closing of the solenoid valve controls the flow of the liquid. The solenoid valve is installed on the lower layer of the control panel. The solenoid valve consists of an iron core, a return spring, a spring seat, and a housing. When energized, the iron core is attracted by the internal electromagnet; when de-energized, the iron core returns to its original position under the force of the return spring.

[0003] When a solenoid valve is working, the ambient air pressure is low, creating a pressure difference with the positive pressure environment inside the valve. If the solenoid valve's suction force is less than the pressure difference force, the valve contacts will reset, altering the blood flow path and causing the separated blood components to mix again. This can lead to the failure of the blood component separation process and even the risk of hemolysis, endangering the blood donor's safety. Therefore, the suction force of the solenoid valve is of paramount importance.

[0004] Currently, the conventional method for testing the solenoid valve's pull-in force is to manually pull the solenoid valve with a spring balance while it is energized and in the pull-in state, and observe the reading of the spring balance during the process to test whether the solenoid valve's pull-in force meets the requirements.

[0005] It is evident that conventional detection methods still have the following shortcomings:

[0006] 1. There are many interfering factors, the measurement process is unstable, and it is easy to cause errors due to human factors;

[0007] 2. The inspection operation is inefficient, requiring at least two people to operate, and the installation is time-consuming and labor-intensive, resulting in a long inspection cycle. Utility Model Content

[0008] In order to solve the technical problems existing in the background art, this utility model provides a device for testing the pull-in force of solenoid valves, which reduces the error caused by human intervention in the testing process and improves the testing efficiency.

[0009] The technical solution adopted by this utility model is:

[0010] A device for testing the pull-in force of a solenoid valve, comprising:

[0011] A fixed frame is set on a horizontal test platform. A lifting cylinder is fixedly installed at the upper end of the fixed frame. A counterweight and an electronic scale are arranged in sequence below the lifting cylinder. The counterweight is set on the electronic scale, and the electronic scale is set at the lower part of the fixed frame.

[0012] The lifting cylinder extends downwards at its stroke end and is equipped with an upper fixing mechanism. A lower fixing mechanism is located directly below the upper fixing mechanism at the upper end of the counterweight.

[0013] The upper fixing mechanism and the lower fixing mechanism are used to fix the upper and lower ends of the solenoid valve, respectively.

[0014] Furthermore, the fixing bracket is configured in a forward-facing "[" shape.

[0015] Furthermore, a through groove is provided through the upright plate in the middle of the fixing frame. The through groove is arranged in the vertical direction and multiple sets are arranged in the horizontal direction.

[0016] Furthermore, the lifting cylinder is fixedly mounted on the lower end of the upper plate of the "[" shaped fixing frame;

[0017] The electronic scale is placed on the upper end of the lower plate of the "[" shaped fixed frame.

[0018] Furthermore, a control mechanism is provided at the upper end of the upper plate of the fixing frame;

[0019] The control mechanism includes: a power supply and a button group that are electrically connected to each other.

[0020] Furthermore, the lifting cylinder is configured as an electric cylinder and is electrically connected to the button assembly.

[0021] Furthermore, the upper fixing mechanism includes:

[0022] An upper fixed seat is fixedly connected to the stroke end of the lifting cylinder. The upper fixed seat is configured as a "U" shape that opens to one side. An upper fixed plate is fixedly installed at the open end of the upper fixed seat. An upper fixed bolt is threaded through and screwed onto the upper fixed plate. The threaded end of the upper fixed bolt extends into the "U"-shaped opening of the upper fixed seat and is rotatably connected to an upper clamping plate that is slidably connected to the upper fixed seat. The upper clamping plate is configured as a "U" shape opposite to the opening of the upper fixed seat.

[0023] Furthermore, the lower fixing mechanism includes:

[0024] A lower fixing seat is fixedly connected to the upper end of the counterweight. The lower fixing seat is configured as a "U" shape that opens to one side. A lower fixing plate is fixedly installed at the open end of the lower fixing seat. A lower fixing bolt is threaded through and screwed onto the lower fixing plate. The threaded end of the lower fixing bolt extends into the "U"-shaped opening of the lower fixing seat and is rotatably connected to a lower clamping plate that is slidably connected to the lower fixing seat. The lower clamping plate is configured as a "U" shape opposite to the opening of the lower fixing seat.

[0025] The beneficial effects of this utility model on the electromagnetic valve attraction force testing device are as follows:

[0026] The lifting cylinder pulls the solenoid valve, which is reliably fixed by the upper and lower fixing mechanisms. The reading on the electronic scale allows for a direct and accurate determination of the pulling force applied to the solenoid valve by the lifting cylinder, thereby judging whether the solenoid valve's closing force meets the requirements. Attached Figure Description

[0027] Figure 1 This utility model provides a three-dimensional schematic diagram of a device for testing the pull-in force of a solenoid valve;

[0028] Figure 2 This utility model provides a partially enlarged three-dimensional schematic diagram of an application device for testing the pull-in force of a solenoid valve. Figure 1 ;

[0029] Figure 3 This utility model provides a partially enlarged three-dimensional schematic diagram of an application device for testing the pull-in force of a solenoid valve. Figure 2 .

[0030] In the picture:

[0031] 100. Solenoid valve

[0032] 1. Mounting frame, 2. Lifting cylinder, 3. Counterweight, 4. Electronic scale

[0033] 51. Upper fixing mechanism; 510. Upper fixing seat; 511. Upper fixing plate; 512. Upper fixing bolts; 513. Upper clamping plate.

[0034] 52. Lower fixing mechanism; 520. Lower fixing seat; 521. Lower fixing plate; 522. Lower fixing bolt; 523. Lower clamping plate. Detailed Implementation

[0035] To more clearly and explicitly illustrate the specific implementation objectives and methods of this utility model, the technical solution of this utility model will be fully described below. The described embodiments are only some embodiments of this utility model, not all embodiments. Without creative effort, all other embodiments based on the described embodiments of this utility model are within the protection scope of this utility model.

[0036] This utility model relates to a device for testing the pull-in force of a solenoid valve, such as... Figure 1 As shown, it includes:

[0037] A fixed frame 1 is installed on a horizontal test platform. The fixed frame 1 is configured in the shape of a forward-facing "[". A through groove is provided through the vertical plate in the middle of the fixed frame 1. The through groove is arranged in the vertical direction and multiple sets are arranged in the horizontal direction. A control mechanism is provided at the upper end of the upper plate of the "[" shaped fixed frame 1, including: a power supply and a button group that are electrically connected to each other. A lifting cylinder 2 is fixedly installed at the lower end of the upper plate of the "[" shaped fixed frame 1. The lifting cylinder 2 is an electric cylinder and is electrically connected to the button group to realize the lifting and lowering of the stroke end of the lifting cylinder 2. A counterweight 3 and an electronic scale 4 are arranged in sequence below the lifting cylinder 2. The counterweight 3 is set on the electronic scale 4. The electronic scale 4 is a precision electronic scale with positive and negative ranges and is placed at the upper end of the lower plate of the "[" shaped fixed frame 1.

[0038] The stroke end of the lifting cylinder 2 extends downward and is provided with an upper fixing mechanism 51, which is used to fix the upper end of the solenoid valve 100, such as... Figure 2 As shown, it includes:

[0039] An upper fixed seat 510 is fixedly connected to the stroke end of the lifting cylinder 2. The upper fixed seat 510 is configured as a "U" shape that opens to one side. An upper fixed plate 511 is fixedly installed at the open end of the upper fixed seat 510. An upper fixed bolt 512 is threaded through and screwed onto the upper fixed plate 511. The threaded end of the upper fixed bolt 512 extends into the "U"-shaped opening of the upper fixed seat 510. An upper clamping plate 513 is rotatably connected to the upper fixed seat 510. The upper clamping plate 513 is configured as a "U" shape opposite to the opening of the upper fixed seat 510.

[0040] The upper end of the counterweight 3 is provided with a lower fixing mechanism 52 located directly below the upper fixing mechanism 51. The lower fixing mechanism 52 is used to fix the lower end of the solenoid valve 100, such as... Figure 3 As shown, it includes:

[0041] A lower fixing seat 520 is fixedly connected to the upper end of the counterweight 3. The lower fixing seat 520 is configured as a "U" shape that opens to one side. A lower fixing plate 521 is fixedly installed at the open end of the lower fixing seat 520. A lower fixing bolt 522 is threaded through and screwed onto the lower fixing plate 521. The threaded end of the lower fixing bolt 522 extends into the "U"-shaped opening of the lower fixing seat 520 and is rotatably connected to a lower clamping plate 523 that is slidably connected to the lower fixing seat 520. The lower clamping plate 523 is configured as a "U" shape opposite to the opening of the lower fixing seat 520.

[0042] Anti-slip textures are provided on the "U"-shaped inner walls of the upper fixing seat 510, upper clamping plate 513, fixing seat 520, and lower clamping plate 523.

[0043] Based on the specific structure of the solenoid valve pull-in force testing device in the above embodiments, its testing process will be further explained below:

[0044] A. Installation:

[0045] The accuracy of electronic scale 4 is checked using standard weights;

[0046] Insert the lower end of the solenoid valve 100 to be tested between the "U"-shaped opening of the lower fixed seat 520 and the lower clamping plate 523, tighten the lower fixing bolt 522, so that the lower clamping plate 523 is close to the lower fixed seat 520 and clamps the lower end of the solenoid valve 100.

[0047] The solenoid valve 100 is electrically connected to the control mechanism and is in the activated state.

[0048] Adjust the stroke end of the lifting cylinder 2 downward by adjusting the button group, so that the upper end of the solenoid valve 100 is inserted between the "U"-shaped opening of the upper fixed seat 510 and the upper clamping plate 513. Tighten the upper fixing bolt 512 so that the upper clamping plate 513 is close to the upper fixed seat 510 and clamps the upper end of the solenoid valve 100.

[0049] Zero the reading on electronic scale 4.

[0050] B. Testing:

[0051] The lifting cylinder 2 is moved upward by adjusting the stroke end of the button group, so that the combination of the upper fixing mechanism 51, the solenoid valve, the lower fixing mechanism 52, and the counterweight 3 is subjected to an upward pulling force.

[0052] If the reading of electronic scale 4 is negative: when the reading of electronic scale 4 is ≤-18N and no solenoid valve reset sound is heard, it is judged that the solenoid valve's pull-in force meets the requirements; conversely, when the reading of electronic scale 4 is >-18N and a solenoid valve reset sound is heard, it is judged that the solenoid valve's pull-in force does not meet the requirements.

[0053] Test complete.

[0054] In summary, the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification. All equivalent variations and modifications of the shape, structure, features, and spirit described in the claims of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A kind of applied to solenoid valve attraction force testing device, it is characterized by comprising: Fixed frame (1) is set on horizontal test bed surface, the upper end of the fixed frame (1) is fixedly provided with lifting cylinder (2), the lower of the lifting cylinder (2) is sequentially provided with counterweight (3), electronic scale (4), the counterweight (3) is set on electronic scale (4), the electronic scale (4) is set in the lower part of fixed frame (1); The stroke end of lifting cylinder (2) extends downward, and is provided with upper fixed mechanism (51), the upper end of counterweight (3) is provided with lower fixed mechanism (52) located directly below upper fixed mechanism (51), The upper fixed mechanism (51), lower fixed mechanism (52) are used to fix the upper and lower ends of solenoid valve (100) respectively.

2. The solenoid valve attraction force testing device according to claim 1, wherein: The fixed frame (1) is arranged as a "[” shape with the buckle facing forward.

3. The solenoid valve attraction force testing device according to claim 2, wherein: A through slot is provided through the vertical plate in the middle of the fixed frame (1), the through slot is arranged in the up-down direction and is provided with multiple groups in the left-right direction.

4. The solenoid valve attraction force testing device according to claim 2, wherein: The lifting cylinder (2) is fixedly arranged on the lower end of the upper plate of the "[” shaped fixed frame (1); The electronic scale (4) is placed on the upper end of the lower plate of the "[” shaped fixed frame (1).

5. The solenoid valve attraction force testing device according to claim 2 or 3, wherein: A control mechanism is arranged on the upper end of the upper plate of the fixed frame (1); The control mechanism includes a power supply and a button group that are electrically connected to each other.

6. The solenoid valve attraction force testing device according to claim 4, wherein: The lifting cylinder (2) is arranged as an electric cylinder and is electrically connected to the button group.

7. The solenoid valve attraction force testing device according to claim 1 or 2 or 3 or 4 or 6, wherein: The upper fixed mechanism (51) includes: An upper fixing seat (510) fixedly connected to the stroke end of the lifting cylinder (2), the upper fixing seat (510) is arranged as a "U” shape with one side open, an upper fixing plate (511) is fixedly arranged on the open end of the upper fixing seat (510), an upper fixing bolt (512) is arranged through and screwed on the upper fixing plate (511), the threaded end of the upper fixing bolt (512) extends into the "U” shaped opening of the upper fixing seat (510) and is rotatably arranged with an upper clamping plate (513) slidingly connected to the upper fixing seat (510), the upper clamping plate (513) is arranged as a "U” shape opposite to the opening of the upper fixing seat (510).

8. The solenoid valve attraction force testing device according to claim 1 or 2 or 3 or 4 or 6, wherein: The lower fixed mechanism (52) includes: ​ The lower fixed seat (520) fixedly connected with the upper end of the counterweight (3) is arranged in a "U" shape with one side open, and the opening end of the lower fixed seat (520) is fixedly provided with a lower fixed plate (521). A lower fixed bolt (522) is penetratingly and screwingly arranged on the lower fixed plate (521), the threaded end of the lower fixed bolt (522) extends into the "U" shaped opening of the lower fixed seat (520), and a lower clamping plate (523) in sliding connection with the lower fixed seat (520) is rotationally arranged. The lower clamping plate (523) is arranged in a "U" shape opposite to the opening of the lower fixed seat (520).

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