Anti-electric plug

Abstract

The present invention relates to an anti-electricity plug, which comprises a core tube and an outer blind tube, wherein the core tube is a through tube with two ends open, and the outer blind tube is a blind tube with one end open and the other end closed, wherein the outer blind tube is sleeved on the periphery of the core tube and a gap is formed between the outer blind tube and the core tube, wherein the tube mouth of the outer blind tube is sealed and connected with the first end of the core tube, and the second end of the core tube is suspended and inserted in the outer blind tube and connected with the gap, and the tube section of the outer blind tube close to the first end is provided with a water distribution hole connected with the gap, and the outer blind tube and the core tube are both insulating tubes. The anti-electricity plug of the present invention can have sufficient water resistance while passing water to form a protective barrier for safe electric isolation, and the overall linear dimension is short and has strong universal adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of anti-electricity walls, in particular to an anti-electricity plug. Background Art

[0002] The electric shock barrier is usually installed inside or outside the water inlet and / or outlet of the electric water heater (such as a water storage electric water heater or a hot water tank), and uses water resistance to attenuate the leakage current to provide leakage protection. The traditional casing type electric shock barrier is usually a stainless steel pipe sleeved on the outside of the insulating pipe. The effective damping length of the electric shock barrier of this structure is the length of the insulating pipe. Therefore, in order to form sufficient water resistance, the overall linear dimension of the product must be designed to be long enough. This will result in the electric shock barrier being limited by the size of the parent body (such as the inner tank of the electric water heater) due to the excessively long linear dimension during installation, and the universal adaptability is poor. Summary of the invention

[0003] Based on this, it is necessary to provide an anti-electricity plug to address the above problems. The anti-electricity plug can have sufficient water resistance while passing water to form a safe and electrical-isolation protective barrier, and the overall linear dimension is short and has strong universal adaptability.

[0004] In order to solve the above technical problems, the present invention provides an anti-electric plug, including a core tube and an outer blind tube, the core tube is a through tube with two ends open, the outer blind tube is a blind tube with one end open and the other end closed, the outer blind tube is sleeved on the outer periphery of the core tube and a gap is formed between the outer blind tube and the core tube, the pipe mouth of the outer blind tube is sealed and connected to the first end of the core tube, the second end of the core tube is suspended and inserted in the outer blind tube and connected to the gap, the pipe section of the outer blind tube close to the first end is provided with a water distribution hole connected to the gap, and the outer blind tube and the core tube are both insulating tubes.

[0005] Compared with the background technology, the anti-electricity plug of the present invention can at least produce the following beneficial effects: when the anti-electricity plug of the present invention is passed through water, the water flow can enter the core tube from the pipe opening at the first end of the core tube, flow into the gap between the outer blind tube and the core tube through the pipe opening at the second end of the core tube, and finally flow out from the water distribution hole on the outer blind tube, or the water flow can also flow in the opposite direction; sufficient water resistance can be generated during the flow of water, and when the electric water heater leaks electricity, the leakage current can be automatically attenuated to within the safety index that the human body can bear (generally, the leakage current must be guaranteed to be ≤2mA), so as to form a safe and electric-insulating protective barrier. And because both the core tube and the outer blind tube are insulating tubes, the effective damping length of the water resistance of the anti-electricity plug is the sum of the length of the core tube and the length of the partial pipe section of the outer blind tube (i.e., the pipe section from the closed end of the outer blind tube to the water distribution hole), so that only a relatively short core tube and the outer blind tube need to be used to cooperate to obtain sufficient effective damping length, thereby shortening the overall linear size of the anti-electricity plug, so that its installation is not limited by the size of the parent body, and has strong universal adaptability.

[0006] In one embodiment, the outer blind pipe includes a water delivery pipe section and a water distribution pipe section that are interconnected, the water distribution pipe section is arranged near the first end, and a plurality of water distribution holes are arranged on the outer periphery of the water distribution pipe section, the core pipe is a constant diameter through pipe, the inner hole radius of the core pipe is r, the length of the core pipe is L1, and the length of the water delivery pipe section is L2, wherein L1+L2≥53r 2 .

[0007] In one embodiment, the cross-sectional area of ​​the gap is equal to or slightly larger than the cross-sectional area of ​​the inner hole of the core tube; and / or,

[0008] The sum of the areas of the plurality of water distribution holes is equal to or greater than the cross-sectional area of ​​the gap.

[0009] In one embodiment, the outer blind tube and / or the core tube are insulating rubber tubes made of insulating rubber material.

[0010] In one embodiment, the outer blind tube and the core tube are both insulating silicone tubes made of silicone material, and the hardness of the insulating silicone tube is 65 degrees to 85 degrees.

[0011] In one of the embodiments, a water retaining cover is sleeved on the outer blind pipe, and the water retaining cover is opened on one side facing the water distribution hole.

[0012] In one embodiment, the water shield is made of elastic material.

[0013] In one embodiment, a first insulating gasket is provided at the periphery of the pipe opening of the outer blind pipe, and a second insulating gasket is provided at the periphery of the pipe opening of the first end portion, and the first insulating gasket and the second insulating gasket are stacked and connected.

[0014] In one embodiment, the outer blind tube and the core tube are coaxially arranged.

[0015] In one embodiment, the inner periphery of the pipe opening of the first end portion is chamfered. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the first embodiment of the anti-electricity plug of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the second embodiment of the anti-electricity plug of the present invention;

[0018] Figure 3 for Figure 2 A schematic longitudinal section diagram of the anti-electricity plug;

[0019] Figure 4 for Figure 2 Schematic diagram of the transverse section of the anti-electric plug.

[0020] 10. Anti-electric plug, 101. Gap, 11. Core tube, 111. First end, 112. Second end, 113. Second insulating gasket, 12. External blind tube, 120. Water distribution hole, 121. Water delivery pipe section, 122. Water distribution pipe section, 123. First insulating gasket, 13. Water retaining cover. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0023] Please refer to Figures 1 to 3 The invention discloses an anti-electric plug 10, comprising a core tube 11 and an outer blind tube 12. The core tube 11 is a through tube with two ends open, and the outer blind tube 12 is a blind tube with one end open and the other end closed. The outer blind tube 12 is sleeved on the outer periphery of the core tube 11, and a gap 101 is formed between the outer blind tube 12 and the core tube 11. The pipe mouth of the outer blind tube 12 is sealed and connected with the first end 111 of the core tube 11. The second end 112 of the core tube 11 is suspended and inserted in the outer blind tube 12 and communicated with the gap 101. The pipe section of the outer blind tube 12 close to the first end 111 is provided with a water distribution hole 120 communicated with the gap 101. Both the outer blind tube 12 and the core tube 11 are insulating tubes.

[0024] Among them, the outer blind tube 12 and the core tube 11 can be made of insulating materials such as plastic material, rubber material or silicone material. The outer blind tube 12 and the core tube 11 can be made of the same insulating material or different insulating materials, which is not specifically limited here. Optionally, insulating fiber material can be added to the insulating material to improve the structural strength of the outer blind tube 12 and / or the core tube 11. The pipe mouth of the outer blind tube 12 and the outer peripheral surface of the first end 111 of the core tube 11 can form an integrated sealed connection structure by bonding, pressing, etc., or a sealed connection can be achieved by a seal. The water distribution hole 120 on the outer blind tube 12 can be a circular hole, a bar hole, a square hole or other special-shaped holes, etc.

[0025] When water is flowing through the anti-electricity plug 10 of the present invention, water can enter the core tube 11 from the pipe opening of the first end 111 of the core tube 11, flow into the gap 101 between the outer blind tube 12 and the core tube 11 through the pipe opening of the second end 112 of the core tube 11, and finally flow out from the water distribution hole 120 on the outer blind tube 12, or the water can flow in the opposite direction; sufficient water resistance can be generated during the flow of water, and when the electric water heater leaks electricity, the leakage current can be automatically attenuated to a safety index that the human body can withstand (generally, the leakage current must be ensured to be ≤2mA), so as to form a safe electrical isolation protection barrier. And because both the core tube 11 and the outer blind tube 12 are insulating tubes, the effective damping length of the water resistance of the anti-electricity plug 10 is the sum of the length of the core tube 11 and the length of a partial pipe section of the outer blind tube 12 (i.e., the pipe section from the closed end of the outer blind tube 12 to the water distribution hole 120). In this way, only relatively short core tubes 11 and outer blind tubes 12 are needed to obtain sufficient effective damping length, thereby shortening the overall linear size of the anti-electricity plug 10, so that its installation is not limited by the size of the parent body, and it has strong universal adaptability.

[0026] In addition, when the water flow rate is too large, the outer blind tube 12 and the core tube 11 are prone to vibration. Since the second end 112 of the core tube 11 is suspended and inserted in the outer blind tube 12 without any rigid connection with the outer blind tube 12, the core tube 11 can generate a certain swing amplitude for adaptive adjustment, thereby avoiding the core tube 11 from breaking, thereby extending the service life of the product, and making the overall structure of the product simpler and easier to assemble.

[0027] Please combine Figure 3 and Figure 4 In one embodiment, the outer blind pipe 12 includes a water delivery pipe section 121 and a water distribution pipe section 122 which are interconnected. The water distribution pipe section 122 is arranged near the first end 111. The outer periphery of the water distribution pipe section 122 is provided with a plurality of water distribution holes 120. The core pipe 11 is a through pipe of equal diameter. The inner hole radius of the core pipe 11 is r. The length of the core pipe 11 is L1. The length of the water delivery pipe section 121 is L2. Wherein, L1+L2≥53r 2 The sum of L1 and L2 is the effective damping length of the water resistor, so that the leakage current in the water entering and leaving the path can be effectively guaranteed to be ≤2mA, so as to ensure the safety and reliability of the anti-electric plug 10. A plurality of water distribution holes 120 are arranged along the circumference of the water distribution pipe section 122, so that the cold water at the water inlet pipe can be evenly dispersed into the hot water of the hot water equipment, reducing the impact of the water flow, and playing a role of divergence and buffering.

[0028] Preferably, the cross-sectional area of ​​the gap 101 is equal to or slightly larger than the cross-sectional area of ​​the inner hole of the core tube 11; and / or the sum of the areas of the plurality of water distribution holes 120 is equal to or larger than the cross-sectional area of ​​the gap 101. In this way, the flow rate of cold water can be further reduced, which plays a role in divergence and pressure reduction, avoids the impact of cold water on hot water, and ensures the hot water output rate.

[0029] In one embodiment, the outer blind tube 12 and / or the core tube 11 are insulating hoses made of insulating colloid material. For example, the core tube 11 can be made of an insulating hose, and the outer blind tube 12 can be made of an insulating plastic tube. The strength of the outer blind tube 12 is relatively high, which can play a certain protective role. For another example, the core tube 11 and the outer blind tube 12 can both be made of insulating hoses, so that the anti-electric plug 10 has good overall elasticity and is free to bend and straight. The outer blind tube 12 and the core tube 11 can be axially bent and rotated. Under the condition of meeting the pipeline flow requirements, the assembly with the inner tank of the hot water equipment is not limited by the inner tank space, and the universal adaptability is strong. In addition, when the water flow rate is large, the core tube 11 and the outer blind tube 12 can produce an appropriate amount of deformation due to their certain elasticity, and play a buffering role on the impact of the water flow, thereby effectively avoiding the anti-electric plug 10 from breaking as a whole, and further improving the service life of the product.

[0030] Preferably, the outer blind tube 12 and the core tube 11 are both insulating silicone tubes made of silicone material, and the hardness of the insulating silicone tube is 65 to 85 degrees. This makes the overall hardness and softness of the anti-electric plug 10 moderate, with good elasticity and freedom of bending and straightness. When bending occurs, the cross-sectional dimensions of the inner hole of the core tube 11 and the gap 101 will not change, so as to ensure that the water flow can pass smoothly. In addition, the silicone material is odorless and tasteless, safer to use, and the molding process is simple, the raw material cost is low, and the cost can be effectively reduced.

[0031] For further information, please refer to Figure 2 In the second embodiment of the anti-electricity plug 10 of the present invention, a water shield 13 is sleeved on the outer blind tube 12, and the water shield 13 is opened on the side facing the water distribution hole 120. Specifically, when the anti-electricity plug 10 is set at the water inlet of the hot water equipment, the water shield 13 can be sleeved on the outer blind tube 12, and the water shield 13 can be set as a trumpet-shaped cover body with an opening expanded toward the side of the water distribution hole 120. The cold water sprayed from the water distribution hole 120 can change the direction of the water flow after flowing back to the water shield 13 through the water inlet of the hot water equipment, and the water shield 13 can further buffer the water flow and evenly distribute the water, so as to avoid excessive impact of cold water on the hot water in the inner tank of the hot water equipment, so as to ensure the hot water output rate. Preferably, the water shield 13 is made of elastic material, for example, the water shield 13 can be made of rubber or silicone material with a certain elasticity, so as to further enhance the buffering effect.

[0032] In addition, a first insulating gasket 123 is provided at the periphery of the tube mouth of the outer blind tube 12, and a second insulating gasket 113 is provided at the periphery of the tube mouth of the first end 111, and the first insulating gasket 123 is connected to the second insulating gasket 113 in a stacked manner. Specifically, the tube mouth of the outer blind tube 12 can be turned over to form the first insulating gasket 123, and the tube mouth of the first end 111 of the core tube 11 can be turned over to form the second insulating gasket 113. After the outer blind tube 12 is sleeved on the core tube 11, the first insulating gasket 123 and the second insulating gasket 113 are stacked, and then the first insulating gasket 123 and the second insulating gasket 113 are connected together by secondary vulcanization or adhesive bonding to form an integrated insulating gasket. Compared with the traditional anti-electricity plug 10, which needs to use additional fasteners and seals to connect and fix the multi-layer sleeves, the structure of the anti-electricity plug 10 of the present invention is simpler and more reliable. In addition, when the anti-electric plug 10 is connected to the electric water heater and the external pipeline, the first insulating gasket 123 and the second insulating gasket 113 can also play the role of electrical insulation and breaking bridge, realizing the non-electrical connection of the entire pipeline of the electric water heater, and further improving the safety performance.

[0033] Preferably, the outer blind tube 12 and the core tube 11 are both made of insulating rubber tubes made of insulating rubber material. Correspondingly, the first insulating gasket 123 and the second insulating gasket 113 are also made of insulating rubber material. Since the insulating gasket itself has good sealing elasticity, the anti-electric plug 10 only needs to be fixed with insulating standard pipe fittings during installation without the need for other auxiliary seals. The structure is simpler and more reliable and is conducive to product standardization and large-scale production.

[0034] Furthermore, the outer blind tube 12 and the core tube 11 are coaxially arranged. The advantage of such a design is that the gap between the outer blind tube 12 and the core tube 11 is ensured to be consistent, thereby ensuring that the water flow rate of each water distribution hole 120 is consistent, further buffering and uniform water distribution, avoiding excessive impact of cold water on the hot water in the inner tank, so as to ensure the hot water output rate.

[0035] Furthermore, in one embodiment, the inner periphery of the tube opening of the first end portion 111 is provided with a chamfer. The advantage of such a design is that the flow resistance at the inlet of the core tube 11 is reduced, while preventing the insulating gasket from clogging the core tube 11 due to extrusion deformation during installation and use.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An anti-electric plug, It is characterized in that The invention comprises a core tube (11) and an outer blind tube (12), wherein the core tube (11) is a through tube with both ends open, and the outer blind tube (12) is a blind tube with one end open and the other end closed, the outer blind tube (12) is sleeved on the outer periphery of the core tube (11) and a gap (101) is formed between the outer blind tube (12) and the core tube (11), the tube mouth of the outer blind tube (12) is sealedly connected to the first end (111) of the core tube (11), the second end (112) of the core tube (11) is suspended and inserted into the outer blind tube (12) and is connected to the gap (101), and the outer blind tube (12) is close to the first end The pipe section (111) is provided with a water distribution hole (120) connected to the gap (101); the outer blind pipe (12) and the core pipe (11) are both insulating pipes; the core pipe (11) is an insulating silicone pipe made of silicone material; the hardness of the insulating silicone pipe is 65 degrees to 85 degrees; the outer blind pipe (12) comprises a water delivery pipe section (121) and a water distribution pipe section (122) which are connected to each other; the water distribution pipe section (122) is arranged close to the first end (111); a plurality of water distribution holes (120) are arranged on the outer periphery of the water distribution pipe section (122); and the core pipe (11) is a through pipe of equal diameter.

2. The anti-electricity plug according to claim 1, It is characterized in that The inner diameter of the core tube (11) is r, the length of the core tube (11) is L1, and the length of the water delivery pipe section (121) is L2, wherein L1+L2≥53r 2 .

3. The anti-electricity plug according to claim 2, It is characterized in that The cross-sectional area of ​​the gap (101) is equal to or slightly larger than the cross-sectional area of ​​the inner hole of the core tube (11); and / or, The sum of the areas of the plurality of water distribution holes (120) is equal to or greater than the cross-sectional area of ​​the gap (101).

4. The anti-electricity plug according to claim 1, It is characterized in that The outer blind tube (12) is an insulating rubber tube made of insulating rubber material.

5. The anti-electricity plug according to claim 4, It is characterized in that The outer blind tube (12) is an insulating silicone tube made of silicone material.

6. The anti-electricity plug according to claim 1, It is characterized in that A water retaining cover (13) is sleeved on the outer blind tube (12), and the water retaining cover (13) is opened on a side facing the water distribution hole (120).

7. The anti-electricity plug according to claim 6, It is characterized in that The water retaining cover (13) is made of elastic material.

8. The anti-electricity plug according to any one of claims 1 to 7, It is characterized in that A first insulating gasket (123) is provided at the periphery of the pipe opening of the external blind tube (12), and a second insulating gasket (113) is provided at the periphery of the pipe opening of the first end portion (111), and the first insulating gasket (123) and the second insulating gasket (113) are connected in a stacked manner.

9. The anti-electricity plug according to any one of claims 1 to 7, It is characterized in that The outer blind tube (12) and the core tube (11) are coaxially arranged.

10. The anti-electricity plug according to any one of claims 1 to 7, It is characterized in that The inner periphery of the pipe opening of the first end portion (111) is provided with a chamfer.

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