Water injection device for insulated safety tools and instruments

Abstract

The utility model discloses a water injection device for an insulated safety tool. The water injection device comprises an inner pipe, a water injection nozzle, an outer pipe, a metal electrode plate, a signal line and a liquid level signal processing unit, the water injection nozzle is communicated with the bottom of the inner pipe, the inner diameter of the inner pipe is matched with the inner diameter of the water injection nozzle, a flange is arranged at the top of the water injection nozzle, the outer diameter of the inner pipe is smaller than the outer diameter of the flange, the metal electrode slice is vertically embedded in the length direction of the inner pipe, and the bottom of the metal electrode slice abuts against the flange; one end is connected to the metal electrode plate, and the other end is connected to the liquid level signal processing unit. On the basis of a water injection structure integrally formed by injection molding of the inner pipe, the water injection nozzle and the outer pipe, the embedded metal electrode slice and the hidden signal line are connected with the external liquid level signal processing unit, so that the risk of mistaken touch and misjudgment caused by liquid splashing and hanging or contact between a sample to be detected and the water injection device in the water injection operation is reduced; and the detection is more accurate and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid level detection technical field, concretely relates to a kind of insulating safety tool water injection device. BACKGROUND

[0002] Regarding the liquid level detection of optical or electronic instrument, under the premise of safe operation, use specification, it should ensure its detection accurate and reliable, in prior art, there is still the situation influencing detection accuracy, such as liquid level false triggering problem caused by liquid hanging liquid or sample to be measured contact. SUMMARY

[0003] The insulating safety tool water injection device provided by the utility model can at least solve one of the above technical problems.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: an insulating safety tool water injection device, comprising an inner tube, a water injection nozzle, an outer tube, a metal electrode sheet, a signal line and a liquid level signal processing unit.

[0005] The water injection nozzle is connected to the bottom of the inner tube, the inner diameter of the inner tube matches the inner diameter of the water injection nozzle, the top of the water injection nozzle is provided with a flange, the outer diameter of the inner tube is smaller than the outer diameter of the flange, the metal electrode sheet is vertically embedded along the length direction of the inner tube, and the bottom abuts against the flange, the outer tube is sleeved outside the inner tube, the signal line passes through the hollow interlayer between the outer tube and the inner tube, one end is connected to the metal electrode sheet, and the other end is connected to the liquid level signal processing unit.

[0006] Further, the length of the outer tube is smaller than the length of the inner tube, the bottom of the outer tube is in the shape of a tapered bucket, extends inward and abuts against the outer wall of the inner tube, and is integrally injection molded with the inner tube, the bottom of the outer tube is arranged on the top of the metal electrode sheet and is provided with a through hole, the inner diameter of the outer tube is larger than the outer diameter of the inner tube, and a hollow interlayer is formed therebetween, and the signal line passes through the through hole to connect to the metal electrode sheet from the hollow interlayer.

[0007] Further, the inner tube and the water injection nozzle are integrally injection molded, and the water injection nozzle is in the shape of a cone.

[0008] Further, the bottom of the outer wall of the inner tube is provided with a groove, the groove is distributed along the length direction of the inner tube and extends to the water injection nozzle, and the metal electrode sheet is embedded and matched with the groove.

[0009] Further, the metal electrode sheet and the signal line have two, respectively symmetrically and parallelly arranged on both sides of the inner tube.

[0010] Further, the liquid level signal processing unit comprises a signal switching circuit (601), a conduction level detection circuit (602) and a capacitance detection circuit (603), the conduction level detection circuit (602) and the capacitance detection circuit (603) are connected via the signal switching circuit (601), the conduction level detection circuit (602) is used for detecting whether the metal electrode sheet (4) is in conduction, and the capacitance detection circuit (603) is used for detecting capacitance change to verify the conduction state of the metal electrode sheet (4).

[0011] The beneficial effects of the utility model are shown in:

[0012] The utility model discloses a water injection structure that is integrally formed by injection molding of an inner tube, a water injection nozzle and an outer tube, plus a metal electrode sheet that is embedded and a signal wire that is installed in a hidden manner, and is connected with a liquid level signal processing unit of an external device to determine the water injection liquid level, reduce the risk of false touch and misjudgment caused by liquid splashing and hanging liquid or contact between the sample to be detected and the water injection device in water injection operation, make detection more accurate and reliable, and the overall structure of the water injection device is simple, easy to produce and control cost, has good economic benefits and popularization prospect. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0014] Figure 1 It is the overall structure schematic diagram of the utility model embodiment.

[0015] Figure 2 It is the connection schematic diagram between the metal electrode sheet and the liquid level signal processing unit of the utility model embodiment.

[0016] Figure 3 It is the conduction level detection circuit schematic diagram of the utility model embodiment.

[0017] Figure 4 It is the capacitance detection circuit schematic diagram of the utility model embodiment.

[0018] The marks of components in the drawings are as follows: 1, inner tube;2, water injection nozzle;201, flange;3, outer tube;4, metal electrode sheet;5, signal wire;6, liquid level signal processing unit;601, signal switching circuit;602, conduction level detection circuit;603, capacitance detection circuit. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0020] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, …), the directional indications are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, "multiple" means more than two.

[0021] Referring to Figures 1-2 The embodiments of the present application provide an insulating safety tool water injection device, which comprises an inner pipe 1, a water injection nozzle 2, an outer pipe 3, a metal electrode sheet 4, a signal line 5 and a liquid level signal processing unit 6.

[0022] The water injection nozzle 2 is communicated at the bottom of the inner pipe 1, the inner diameter of the inner pipe 1 matches the inner diameter of the water injection nozzle 2, the top of the water injection nozzle 2 is provided with a flange 201, the outer diameter of the inner pipe 1 is smaller than the outer diameter of the flange 201, the metal electrode sheet 4 is vertically embedded along the length direction of the inner pipe 1 and the bottom abuts against the flange 201, the outer pipe 3 is sleeved outside the inner pipe 1, the signal line 5 passes through the hollow interlayer between the outer pipe 3 and the inner pipe 1, one end is connected to the metal electrode sheet 4 and the other end is connected to the liquid level signal processing unit 6.

[0023] Referring to Figure 1In the embodiment, the length of the outer tube 3 is less than that of the inner tube 1, the bottom of the outer tube 3 is in the shape of a cone barrel, extends inwardly and abuts against the outer wall of the inner tube 1, and is integrally formed with the inner tube 1 by injection molding, the bottom of the outer tube 3 is placed on the top of the metal electrode sheet 4, and a through hole is formed therein, the inner diameter of the outer tube 3 is greater than the outer diameter of the inner tube 1, and a hollow interlayer is formed therebetween, and the signal line 5 is connected to the metal electrode sheet 4 through the through hole from the hollow interlayer. In this way, the outer tube 3 protects the signal line 5, the hollow interlayer limits the activity range of the signal line 5, the position of the through hole can be sealed and waterproofed, and the inner tube 1 vertically extends into the water container. During the injection of liquid into the water container through the water injection nozzle 2, since the bottom of the outer tube 3 is fixedly connected to the outer wall of the inner tube 1, liquid cannot splash into the hollow interlayer, thereby greatly reducing the damage to the signal line 5.

[0024] Referring to Figure 1 In the embodiment, the inner tube 1 is integrally formed with the water injection nozzle 2 by injection molding, and the water injection nozzle 2 is in the shape of a cone. In this way, liquid is injected from the inner tube 1 and flows along the water injection nozzle 2 to the water container. Since the water injection nozzle 2 is in the shape of an inverted cone, the outlet is small, which can effectively suppress the splashing of liquid during injection. At the same time, since the outer diameter of the water injection nozzle 2 is greater than the outer diameter of the inner tube 1, the splashing of liquid onto the metal electrode sheet 4 during the injection of liquid into the water container through the water injection nozzle 2 can be effectively prevented, thereby avoiding the false touch and false judgment.

[0025] Referring to Figure 1 In the embodiment, a groove is formed in the bottom of the outer wall of the inner tube 1, the groove is distributed along the length direction of the inner tube 1 and extends to the water injection nozzle 2, and the metal electrode sheet 4 is embedded and matched with the groove. In this way, the metal electrode sheet 4 is embedded in the outer wall of the inner tube 1 and abuts against the water injection nozzle 2. During the water injection of the water injection nozzle 2, the liquid level in the water container gradually rises until the liquid level reaches the position of the metal electrode sheet 4, and it is determined that the liquid level threshold has been reached, and then the water injection is stopped.

[0026] The water injection device can not only be used alone to determine whether the liquid level of the water container meets the standard, but also can be assembled with other devices to achieve more functions, for example, assembled with a motor device. Under the linear driving action of the motor, the water injection device can be lifted up and down in the water container. If different liquid level lines are marked on the wall surface of the water container, the water injection device can be converted into a liquid level measuring device. The water injection device can also be assembled with other devices other than the motor device to achieve other more functions, which will not be described here.

[0027] It should be noted that any technical solution achieved based on the water injection device without any creative labor and / or used in cooperation with other devices is a routine technical selection made by the person skilled in the art according to actual needs, which falls within the protection scope of the present application.

[0028] Referring to Figure 1 In the embodiment, the metal electrode sheet 4 and the signal line 5 are two, which are symmetrically and parallelly arranged on both sides of the inner tube 1. In this way, the two metal electrode sheets 4 arranged on both sides of the inner tube 1 can help to improve and calibrate the accuracy of liquid level detection.

[0029] Referring to Figures 2-4 In the embodiment, the liquid level signal processing unit 6 includes a signal switching circuit 601, a conduction level detection circuit 602 and a capacitance detection circuit 603, the conduction level detection circuit 602 and the capacitance detection circuit 603 are connected through the signal switching circuit 601, the conduction level detection circuit 602 is used to detect whether the metal electrode sheet 4 is conductive, and the capacitance detection circuit 603 is used to detect capacitance change to verify the conduction state of the metal electrode sheet 4. In this way, the liquid level signal processing unit 6 is an external device independent of the water injection device, and uses an existing signal processing device that can be obtained by purchase, such as a microprocessor or an electronic chip, which is connected with the water injection device through the signal line 5. The length of the signal line 5 is sufficient by default. During the water injection detection of the liquid level, the conduction level detection circuit 602 is used to determine whether the metal electrode sheet 4 is conductive. If it is conductive, it is preliminarily judged that there is liquid connected to the metal electrode sheet 4. In order to avoid misjudgment, the liquid level signal processing unit 6 is switched to the capacitance detection mode through the signal switching circuit 601, that is, the capacitance detection circuit 603 is used to detect the change of capacitance. If the capacitance changes, it is judged that the liquid conduction actually occurs, and the water injection operation is stopped.

[0030] In summary, the utility model provides a kind of insulated safety tool water injection device to solve the problem of liquid level false triggering caused by liquid hanging or sample contact in prior art, which is based on the water injection structure of inner tube, water injection nozzle and outer tube injection molding integrated, plus the metal electrode sheet of embedded setting and the signal line of hidden installation, connect with the liquid level signal processing unit of external device to judge water injection liquid level, reduce the risk of false triggering caused by liquid splashing in water injection operation, make detection more accurate and reliable, at the same time, the overall structure of the device is simple, easy to produce and control cost, with good economic benefit and popularization prospect.

[0031] It should be understood that the examples and embodiments described herein are merely illustrative and not intended to limit the present application, and those skilled in the art can make various modifications or changes according to it, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An insulated safety tool water injection device, characterized by, It comprises an inner tube (1), a water injection nozzle (2), an outer tube (3), a metal electrode sheet (4), a signal line (5) and a liquid level signal processing unit (6). The water injection nozzle (2) is communicated at the bottom of the inner tube (1), the inner diameter of the inner tube (1) matches the inner diameter of the water injection nozzle (2), the top of the water injection nozzle (2) is provided with a flange (201), the outer diameter of the inner tube (1) is smaller than the outer diameter of the flange (201), the metal electrode sheet (4) is vertically embedded along the length direction of the inner tube (1) and the bottom is in contact with the flange (201), the outer tube (3) is sleeved outside the inner tube (1), the signal line (5) passes through the hollow interlayer between the outer tube (3) and the inner tube (1), one end is connected to the metal electrode sheet (4) and the other end is connected to the liquid level signal processing unit (6).

2. The insulated safety tool water injection device of claim 1, wherein, The length of the outer tube (3) is smaller than the length of the inner tube (1), the bottom of the outer tube (3) is in the shape of a tapered bucket, extends inward and is in contact with the outer wall of the inner tube (1), and is integrally injection molded with the inner tube (1), the bottom of the outer tube (3) is placed on the top of the metal electrode sheet (4) and is provided with a through hole, the inner diameter of the outer tube (3) is larger than the outer diameter of the inner tube (1), forming a hollow interlayer therebetween, and the signal line (5) passes through the through hole to connect to the metal electrode sheet (4) from the hollow interlayer.

3. The insulated safety tool water injection device of claim 1, wherein, The inner tube (1) is integrally injection molded with the water injection nozzle (2), and the water injection nozzle (2) is in the shape of a cone.

4. The insulated safety tool water injection device of claim 1, wherein, The bottom of the outer wall of the inner tube (1) is provided with a groove, the groove is distributed along the length direction of the inner tube (1) and extends to the water injection nozzle (2), and the metal electrode sheet (4) is embedded and matched with the groove.

5. The insulated safety tool water injection device of claim 1, wherein, The metal electrode sheet (4) and the signal line (5) have two, respectively symmetrically and parallelly arranged on both sides of the inner tube (1).

6. The insulated safety tool water injection device of claim 1, wherein, The liquid level signal processing unit (6) comprises a signal switching circuit (601), a conduction level detection circuit (602) and a capacitance detection circuit (603), the conduction level detection circuit (602) and the capacitance detection circuit (603) are connected through the signal switching circuit (601), the conduction level detection circuit (602) is used for detecting whether the metal electrode sheet (4) is conductive or not, and the capacitance detection circuit (603) is used for detecting capacitance change to verify the conduction state of the metal electrode sheet (4).

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