Liquid leakage detection device

Abstract

The utility model discloses a liquid leakage detection device, which belongs to the technical field of seepage detection and comprises a detection cylinder shell and a detection main body structure, the detection main body structure comprises a plurality of groups of liquid drop receiving sensitive elements, and each liquid drop receiving sensitive element comprises a pair of gold-plated copper pole pieces fixed on the inner wall of the detection cylinder shell; a plurality of groups of liquid drop receiving sensitive elements are arranged on the inner wall of the detection cylinder shell, a centrifugal cup storage seat is movably arranged at the bottom of an inner cavity of the detection cylinder shell, and driving equipment for driving the centrifugal cup storage seat is fixed at the bottom of the detection cylinder shell. Whether liquid drops seep from the centrifugal cup or not is detected by utilizing the change of a resistance value between the two groups of gold-plated copper pole pieces, so that whether the centrifugal cup leaks liquid or not is quickly detected, meanwhile, signals are transmitted out through the signal processing unit and the microprocessor unit, the host controls the equipment to stop, continuous leakage of liquid is avoided, and the detection accuracy is high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid leakage detection, in particular to a liquid leakage detection device. Background Art

[0002] With the development of medical treatment and the promotion of autologous blood transfusion technology, the use of autologous blood recovery and separation equipment is becoming more and more frequent. However, during the operation of blood recovery and separation equipment, the consumable separation cup (containing the blood to be cleaned and separated) is at risk of leakage or rupture during high-speed operation. If the operation is not stopped in time, the blood inside will splatter everywhere, and the centrifugal cup will lose balance and collide with the inner wall of the equipment at high speed, which will not only pollute and seriously damage the recovery and separation equipment, but also threaten the personal safety of the operator.

[0003] Based on the above situation, we designed a liquid leakage detection device that can sensitively detect tiny droplets thrown out of the centrifuge cup and immediately perform emergency shutdown to minimize the impact or risk as much as possible. Utility Model Content

[0004] The purpose of the utility model is to provide a liquid leakage detection device. When a conductive liquid drop falls between the gold-plated copper electrodes in a receiving sensitive element, the resistance value between the two gold-plated copper electrodes is reduced, which is equivalent to a humidity-sensitive resistor. The signal processing unit processes and amplifies the signal into a high- and low-level signal output. After the microprocessor unit collects the high- and low-level signals, the signals are uploaded to the host via the RS485 signal. The host executes corresponding measures to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a liquid leakage detection device, comprising:

[0006] Detection tube shell and detection main body structure;

[0007] The detection main structure includes multiple groups of droplet receiving sensitive elements, and the droplet receiving sensitive elements include a pair of gold-plated copper electrodes fixed on the inner wall of the detection tube shell;

[0008] A centrifugal cup storage seat is movably provided at the bottom of the inner cavity of the detection cylinder shell, and a driving device for driving the centrifugal cup storage seat is fixed at the bottom of the detection cylinder shell;

[0009] The invention also includes a controller which is fixed on the outer side of the detection tube shell.

[0010] Preferably, the two groups of gold-plated copper pole pieces are symmetrically arranged, and the gold-plated copper pole pieces include a first horizontal segment and a second horizontal segment, and an elastic inclined segment is connected between the first horizontal segment and the second horizontal segment.

[0011] Preferably, an insulating isolation ring is filled between the first horizontal sections, and a support ring is provided between the two groups of the droplet receiving sensitive elements, and the support ring is attached to the outer side of the second horizontal section on the gold-plated copper electrode.

[0012] Preferably, an arc segment is provided at one end of the second horizontal segment away from the elastic inclined segment, and the arc segments on adjacent droplet receiving sensitive elements are butted against each other.

[0013] Preferably, the controller comprises a signal processing unit and a microprocessor unit, and the signal processing unit is electrically connected to the droplet receiving sensitive element and the microprocessor unit respectively.

[0014] Preferably, a barrel cover for sealing is installed on the top of the detection cylinder housing, and supporting legs are fixed on the bottom of the detection cylinder housing.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model sets multiple groups of droplet receiving sensitive elements on the inner wall of the detection tube shell, and uses the change of the resistance value between two groups of gold-plated copper electrodes to detect whether there are droplets seeping out of the centrifuge cup, thereby quickly detecting whether the centrifuge cup has leakage. At the same time, the signal is transmitted through the signal processing unit and the microprocessor unit, and the host controls the shutdown of the equipment to avoid continuous leakage of liquid, and the detection accuracy is high.

[0017] 2. The utility model arranges the gold-plated copper electrode structure so that the first horizontal section can be conveniently installed on the inner wall of the detection tube shell. At the same time, the two groups of gold-plated copper electrode pieces are separated by the insulating isolation ring. The elastic inclined section can support the second horizontal section to maintain the distance between the two groups of second horizontal sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the gold-plated copper electrode of the utility model;

[0022] Figure 5 This is a system diagram of the droplet receiving sensitive element, signal processing unit and microprocessor unit of the utility model;

[0023] Figure 6 This is a schematic diagram of the internal circuit of the signal processing unit of the present invention.

[0024] Numbers in the figure: 1. Detection tube housing; 2. Droplet receiving sensitive element; 21. Gold-plated copper electrode; 211. First horizontal section; 212. Second horizontal section; 213. Elastic inclined section; 214. Arc section; 3. Centrifugal cup storage seat; 4. Driving device; 5. Controller; 6. Insulating isolation ring; 7. Support ring; 8. Barrel cover; 9. Support leg. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The utility model provides Figures 1 to 4 A liquid leakage detection device shown includes:

[0027] Detection tube housing 1 and detection main body structure;

[0028] The detection main structure includes multiple groups of droplet receiving sensitive elements 2, and the droplet receiving sensitive elements 2 include a pair of gold-plated copper electrodes 21 fixed on the inner wall of the detection tube housing 1;

[0029] A centrifugal cup storage seat 3 is movably provided at the bottom of the inner cavity of the detection tube housing 1, and a driving device 4 for driving the centrifugal cup storage seat 3 is fixed at the bottom of the detection tube housing 1;

[0030] It also includes a controller 5 fixed on the outside of the detection tube housing 1;

[0031] By arranging multiple groups of droplet receiving sensitive elements 2 on the inner wall of the detection tube housing 1, the change in the resistance value between the two groups of gold-plated copper electrodes 21 is used to detect whether there are droplets seeping out of the centrifuge cup, thereby quickly detecting whether the centrifuge cup has leakage. At the same time, the signal is transmitted through the signal processing unit and the microprocessor unit, and the host controls the shutdown of the equipment to avoid continuous liquid leakage, and the detection accuracy is high.

[0032] Among them, such as Figure 4 As shown:

[0033] The two groups of gold-plated copper pole pieces 21 are symmetrically arranged. The gold-plated copper pole pieces 21 include a first horizontal section 211 and a second horizontal section 212. An elastic inclined section 213 is connected between the first horizontal section 211 and the second horizontal section 212. Through the arrangement of the structure of the gold-plated copper pole pieces 21, the first horizontal section 211 is conveniently installed on the inner wall of the detection tube housing 1. At the same time, the two groups of gold-plated copper pole pieces 21 are isolated and separated by the insulating isolation ring 6. The elastic inclined section 213 can support the second horizontal section 212 to maintain the distance between the two groups of second horizontal sections 212.

[0034] Further, such as Figure 3 As shown:

[0035] An insulating isolation ring 6 is filled between the first horizontal sections 211, and a support ring 7 is provided between the two groups of droplet receiving sensitive elements 2. The support ring 7 is attached to the outer side of the second horizontal section 212 on the gold-plated copper electrode 21. The provision of the insulating isolation ring 6 not only facilitates the support and fixation of the two groups of gold-plated copper electrode pieces 21, but also plays an isolation role. Then, the support ring 7 is used to support the two groups of droplet receiving sensitive elements 2 to prevent droplets from falling between the two groups of droplet receiving sensitive elements 2 and being unable to be detected.

[0036] Preferably, Figure 4 As shown:

[0037] An arc segment 214 is provided at one end of the second horizontal segment 212 away from the elastic inclined segment 213. The arc segments 214 on adjacent droplet receiving sensitive elements 2 are connected to each other. The arrangement of the arc segments 214 facilitates the diversion of droplets, so that the droplets slide toward the middle along the gold-plated copper electrode 21, and the droplets contact the gold-plated copper electrode 21 on both sides of the insulating isolation ring 6, so that the resistance value between the two groups of gold-plated copper electrode 21 changes, and leakage is detected by detecting the change in resistance value.

[0038] It is worth noting that if Figure 5 As shown:

[0039] The controller 5 includes a signal processing unit and a microprocessor unit. The signal processing unit is electrically connected to the droplet receiving sensitive element 2 and the microprocessor unit respectively. Through the signal processing unit and the microprocessor unit, the change in the resistance value between the two sets of gold-plated copper electrodes 21 is conveniently processed and separated, and then transmitted to the host, and then the drive device 4 is shut down through the host.

[0040] In a further preferred embodiment, Figure 1 As shown:

[0041] A barrel cover 8 for sealing is installed on the top of the detection barrel housing 1, and a supporting leg 9 is fixed to the bottom of the detection barrel housing 1. The barrel cover ensures the sealing of the interior of the detection barrel housing 1, and the supporting leg 9 plays a supporting role.

[0042] A liquid leakage detection device consists of a liquid droplet receiving sensitive element 2 composed of a pair of copper electrode plates, a signal processing unit, and a microprocessor unit. When there is conductive liquid attached to the sensitive element, its resistance value will change. After being processed and amplified by the signal processing unit into a high and low level signal for output, after the microprocessor unit collects the high and low level signals, it uploads them to the host through the RS485 signal, and the host takes corresponding measures.

[0043] The liquid droplet receiving sensitive element 2 is composed of two electrode plates made of bare gold-plated copper sheets, and the distance between the electrode plates is within 0.2 mm. In a normal dry environment, the resistance value between the two plates is infinite. When there is conductive liquid attached to them, the resistance value between the two plates will decrease significantly, equivalent to a humidity-sensitive resistor.

[0044] The signal processing unit is as Figure 6 shown, and is composed of R1, R2, R3, U1, C1, C2, C3, C4, P1, and FPC. Among them, C1, C2, C3, and C4 play a role in signal or power supply voltage stabilization and filtering, filtering out interference and stabilizing the circuit. FPC is both a sensitive device and can be used as a humidity-sensitive resistor represented by RH, forming a series voltage division with R3 to obtain VIN-. R1 and R2 form a series voltage division to obtain VIN+. P1 is the power supply input port and the OUT signal output port. According to the principle of series voltage division, we can get: VIN- = 5V * RX / (R3 + RH), VIN+ = 5V * R1 / (R1 + R2). U1 is a conventional operational amplifier chip. VIN- and VIN+ are respectively connected to the inverting input terminal and the non-inverting input port of U1 to form a comparator. When VIN- > VIN+, OUT is at a low level, and when VIN- < VIN+, OUT is at a low level. Normally, due to the infinite resistance value RH of FPC, the value of VIN- is close to the power supply voltage of 5V, greater than VIN+, and OUT outputs a low level signal. When the surface of FPC is affected by moisture or there are liquid droplets, the resistance value of RH will decrease, and the value of VIN- will slowly decrease. When it is lower than VIN+, the OUT level triggers a conversion to a high level and is output through the P1 port. When VIN- < VIN+ is the liquid leakage situation, we can get 5V * RH / (R3 + RH) < 5V * R1 / (R1 + R2), that is, when RH < R1 * R3 / R2, it is liquid leakage. From this formula, it can be concluded that if the change in the resistance value of the sensitive element when encountering liquid is not obvious, the detection sensitivity can be improved by increasing the resistance values of R1 and R3 and decreasing the resistance value of R2. If the change in the resistance value is obvious, the detection sensitivity can be reduced by decreasing the resistance values of R1 and R3 and increasing the resistance value of R2. By adjusting the detection sensitivity in this way, the leakage detection of tap water, normal saline, and blood can be realized according to the actual situation.

[0045] The microprocessor unit is a small system board composed of a single chip microcomputer. It collects the high and low levels of OUT through the P1 port and transmits this high and low level signal to the host through the RS485 interface. The host makes a stop or other processing according to the obtained OUT level signal.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid leakage detection device, characterized in that: include: Detection tube housing (1) and detection main body structure; The detection main structure includes multiple groups of droplet receiving sensitive elements (2), and the droplet receiving sensitive elements (2) include a pair of gold-plated copper electrodes (21) fixed on the inner wall of the detection tube housing (1); A centrifugal cup storage seat (3) is movably provided at the bottom of the inner cavity of the detection cylinder housing (1), and a driving device (4) for driving the centrifugal cup storage seat (3) is fixed at the bottom of the detection cylinder housing (1); It also includes a controller (5) fixed on the outside of the detection tube housing (1).

2. The liquid leakage detection device according to claim 1, characterized in that: The two groups of gold-plated copper pole pieces (21) are symmetrically arranged, and the gold-plated copper pole pieces (21) include a first horizontal section (211) and a second horizontal section (212), and an elastic inclined section (213) is connected between the first horizontal section (211) and the second horizontal section (212).

3. The liquid leakage detection device according to claim 2, characterized in that: An insulating isolation ring (6) is filled between the first horizontal sections (211), a support ring (7) is provided between the two groups of droplet receiving sensitive elements (2), and the support ring (7) is attached to the outer side of the second horizontal section (212) on the gold-plated copper electrode (21).

4. The liquid leakage detection device according to claim 2, characterized in that: An arc segment (214) is provided at one end of the second horizontal segment (212) away from the elastic inclined segment (213), and the arc segments (214) on adjacent droplet receiving sensitive elements (2) are butted against each other.

5. The liquid leakage detection device according to claim 1, characterized in that: The controller (5) includes a signal processing unit and a microprocessor unit, and the signal processing unit is electrically connected to the droplet receiving sensitive element (2) and the microprocessor unit respectively.

6. The liquid leakage detection device according to claim 1, characterized in that: A barrel cover (8) for sealing is installed on the top of the detection barrel housing (1), and a supporting leg (9) is fixed on the bottom of the detection barrel housing (1).

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