Pressure release valve and liquid conveying device thereof

Abstract

The utility model discloses a pressure release valve and a liquid delivery device thereof, which comprise a valve body, the valve body is provided with a liquid inlet, a liquid outlet and a drainage port, and the liquid inlet is communicated with the liquid outlet and the drainage port; an elastic piece is arranged on the valve body, the elastic piece abuts against one end of the valve rod, a dovetail groove is formed in the other end of the valve rod, an elastic sealing ring is installed in the dovetail groove, and the elastic sealing ring abuts against the drainage port. The pressure release valve is reasonable in structural design and has the advantages of being simple in structure, low in cost and easy to integrate into a liquid conveying device, and the liquid conveying device comprising the pressure release valve basically avoids or reduces the problem of hose explosion when conveying high-pressure water. Meanwhile, the elastic sealing ring can achieve a good sealing effect of the valve rod and the drainage port, and the arrangement of the dovetail groove can achieve stable installation of the elastic sealing ring.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic overload protection device technical field especially relates to a relief valve and liquid delivery device. BACKGROUND

[0002] The water with 40-60 kg pressure is used in the cleaning of photovoltaic module, sometimes needs to deliver high pressure water in long distance such as several hundred meters, at present needs to use the high cost special chemical high pressure pipe or the relatively cumbersome pipe such as steel wire winding rubber high pressure pipe, or the high cost chemical special hose.

[0003] The PVC hose (the wall contains chemical fiber silk) is commonly known as full knitting high pressure hose, and the cost is low, and the weight is light, and it is easy to use, and some such silk hose can withstand 6 MPa water pressure stable work, but its disadvantage is that the burst pressure is not good, when the hose is suddenly bent, the end is suddenly blocked, the pressure in the pipe is quickly close to 9-10 MPa, and the pipe is easily broken. UTILITY MODEL CONTENTS

[0004] The utility model discloses a relief valve and liquid delivery device, to solve the technical problem that the PVC hose is easily broken in the cleaning of photovoltaic module.

[0005] In order to realize the above-mentioned purpose, the utility model provides a relief valve, including the valve body, the valve body is provided with the liquid inlet, the liquid outlet, the flow outlet, the liquid inlet with the liquid outlet, the flow outlet intercommunication, the valve body is provided with the elastic piece, the elastic piece with the one end of valve rod is opposite, the other end of valve rod is provided with the dovetail groove, the dovetail groove is equipped with the elastic sealing ring, the elastic sealing ring with the flow outlet is opposite.

[0006] Further, the place for setting the elastic piece and the valve rod on the valve body is an open cavity.

[0007] Further, the valve body is provided with a threaded hole for setting an adjusting screw, one end of the adjusting screw abuts against one end of the elastic piece, the other end of the elastic piece abuts against one end of the valve rod, and the threshold value of the valve body pressure relief can be adjusted and fixed by the adjusting screw.

[0008] Further, the adjusting screw is provided with a fixing nut, and the fixing nut is located on the side of the threaded hole away from the cavity.

[0009] Further, the elastic piece is a spring.

[0010] Further, the adjusting screw is provided with a spring pressing block, which is located at one side of the threaded hole close to the cavity; the spring pressing block is fixedly connected with the adjusting screw or is separately provided.

[0011] Further, the liquid inlet and the liquid outlet are respectively arranged at the left and right ends of the valve body, the flow outlet is arranged at the middle of the valve body and is inclined to the upper right, the cavity and the threaded hole are arranged in sequence at the upper right of the flow outlet, and the front and back sides or one side of the cavity is an open opening.

[0012] Further, the threshold value of the valve body pressure relief can be set in the range of 2 to 9 MPa.

[0013] Further, the valve body is made of an integral aluminum alloy.

[0014] The utility model also provides a kind of liquid delivery device, including hose, still including the pressure relief valve of any one of the above technical solutions, wherein, the hose is connected with one end or both ends of the pressure relief valve by hose joint;The liquid delivery device can deliver water for photovoltaic module cleaning.

[0015] In conclusion, the technical scheme of the utility model has the following beneficial effects: the structure of the utility model is reasonable, (1) the liquid inlet, the liquid outlet and the flow outlet are arranged on the valve body, and the liquid inlet is communicated with the liquid outlet and the flow outlet; thus, when the photovoltaic module is cleaned, water or other liquid for photovoltaic module cleaning can be input from the liquid inlet and output from the liquid outlet or the flow outlet.(2) the elastic member is arranged on the valve body, the elastic member abuts against one end of the valve rod, the other end of the valve rod is provided with a dovetail groove, the elastic sealing ring is arranged in the dovetail groove, and the elastic sealing ring abuts against the flow outlet; thus, when the water pressure is stable (such as 6 MPa), the hose (such as silk-wrapped PVC hose) for water delivery can withstand stable work, when the hose is suddenly bent or the end is suddenly blocked, the pressure reaches a certain degree (for example, the pressure in the hose quickly approaches 9-10 MPa), the water pressure pushes the valve rod open, the elastic member is compressed, and then water flows out from the flow outlet, so that the water pressure decreases, which basically solves the problem of hose explosion. It can be seen from the above that the pressure relief valve has the characteristics of simple structure, low cost and easy integration into a liquid delivery device, and the liquid delivery device containing the pressure relief valve basically avoids or reduces the problem of hose explosion when delivering high-pressure water. At the same time, the elastic sealing ring can realize good sealing effect between the valve rod and the flow outlet, and the setting of the dovetail groove can realize stable installation of the elastic sealing ring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a cross-sectional structure schematic view of the pressure relief valve of the utility model;

[0017] Figure 2It is the front view structural schematic diagram of the pressure relief valve of the utility model;

[0018] Figure 3 It is the three-dimensional structure schematic diagram of the pressure relief valve of the utility model;

[0019] Figure 4 It is another angle three-dimensional structure schematic diagram of the pressure relief valve of the utility model;

[0020] Figure 5 It is the three-dimensional schematic diagram of the liquid delivery device of the utility model;

[0021] Mark explanation: 1-valve body, 2-elastic part, 3-valve stem, 4-adjusting screw, 5-fixing nut, 6-spring pressing block, 7-elastic sealing ring, 8-hose, 9-hose joint;

[0022] 101-liquid inlet, 102-liquid outlet, 103-drainage port, 104-cavity, 105-threaded hole, 106-opening, 301-dovetail groove. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in connection with the drawings in the embodiments of the utility model, but does not constitute the limitation to the protection scope of the utility model.

[0024] In the utility model, in order to describe more clearly, make the following explanation: the observer faces the attached Figure 1 Observation, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as front, the back of the observer is set as back, the upper surface of the observer is set as upper, the lower surface of the observer is set as lower, it should be pointed out that the terms "front end", "rear end", "left side" "right side", "middle part", "upper", "lower" in the text indicate the orientation or positional relationship based on the orientation or positional relationship of the attached drawing, only for the convenience of clearly describing the utility model, and not indicate or imply that the structure or part indicated must have a particular orientation, therefore, it cannot be understood as the limitation to the utility model.In addition, the terms "first", "second", "third", "fourth" are only for the purpose of clarity or simplification of description, and cannot be understood as indicating or implying relative importance or quantity.

[0025] Reference Figures 1-4The embodiment provides a pressure relief valve, which comprises a valve body 1, a liquid inlet 101, a liquid outlet 102 and a flow outlet 103 are arranged on the valve body 1, the liquid inlet 101 is communicated with the liquid outlet 102 and the flow outlet 103, an elastic element 2 is arranged on the valve body 1, the elastic element 2 is abutted with one end of a valve rod 3, a dovetail groove 301 is arranged on the other end of the valve rod 3, an elastic sealing ring 7 is arranged in the dovetail groove 301, and the elastic sealing ring 7 is abutted with the flow outlet 103. (1) The liquid inlet, the liquid outlet and the flow outlet are arranged on the valve body, the liquid inlet is communicated with the liquid outlet and the flow outlet, so that when a photovoltaic module is cleaned, water or other liquid used for cleaning the photovoltaic module can be input from the liquid inlet and output from the liquid outlet or the flow outlet. (2) The elastic element is arranged on the valve body, the elastic element is abutted with one end of the valve rod, the other end of the valve rod is provided with the dovetail groove, the elastic sealing ring is arranged in the dovetail groove, and the elastic sealing ring is abutted with the flow outlet, so that when the water pressure is stable (for example, 6 MPa of water pressure), the hose (for example, a silk PVC hose) for conveying water can withstand stable work, when the hose is suddenly bent or the end is suddenly blocked, the pressure is large to a certain extent (for example, the pressure in the hose quickly approaches 9-10 MPa), the water pressure can push the valve rod, the elastic element is compressed, then the water flows out from the flow outlet, and the water pressure decreases, so that the problem of hose explosion can be basically solved. According to the analysis, the pressure relief valve has the characteristics of simple structure, low cost and easy integration into a liquid conveying device, and the liquid conveying device containing the pressure relief valve basically avoids or reduces the problem of hose explosion when conveying high-pressure water. Meanwhile, the elastic sealing ring can realize good sealing effect of the valve rod and the flow outlet, and the setting of the dovetail groove can realize stable installation of the elastic sealing ring.

[0026] Specifically, the place for arranging the elastic element 2 and the valve rod 3 on the valve body 1 is an open cavity 104. Action: the water flows out from the flow outlet to the cavity 104, and the cavity 104 is convenient for installing the elastic element 2, the valve rod 3 and other components.

[0027] Specifically, a threaded hole 105 is arranged on the valve body 1 for arranging an adjusting screw 4, one end of the adjusting screw 4 is abutted with one end of the elastic element 2, the other end of the elastic element 2 is abutted with one end of the valve rod 3, and the threshold value of pressure relief of the valve body 1 can be adjusted and fixed through the adjusting screw 4. Action: the pressure that the pressure relief valve can withstand is adjusted by applying or reducing the pressure of the elastic element 2 through screwing in or out of the adjusting screw, that is, the flow pressure is controlled by adjusting the pressure of the elastic element 2.

[0028] Specifically, a fixed nut 5 is arranged on the adjusting screw 4, and the fixed nut 5 is located on the side of the threaded hole 105 away from the cavity 104. Action: the fixed nut 5 can help fix the adjusting screw after being screwed in or out.

[0029] Specifically, the elastic member 2 is a spring. Action: By adjusting the spring pressure to control the pressure relief pressure, the pressure relief valve has the characteristics of simple structure, low cost and easy integration into the liquid delivery device, and the hose infusion device (such as a liquid delivery device) containing the pressure relief valve basically avoids or reduces the problem of hose explosion when delivering high-pressure water.

[0030] Specifically, the adjusting screw 4 is provided with a spring pressing block 6, and the spring pressing block 6 is located on one side of the threaded hole 105 close to the cavity 104. Action: The spring pressing block 6 can better apply or reduce pressure to the spring to adjust the pressure relief valve can withstand.

[0031] Specifically, the spring pressing block 6 is fixedly connected with the adjusting screw 4 or is separately provided. Action: When fixedly connected, stable connection can be achieved, and when separately provided, various flexible forms such as abutting can be achieved.

[0032] Specifically, the liquid inlet 101 and the liquid outlet 102 are respectively arranged at the left and right ends of the valve body 1, the pressure relief port 103 is arranged at the middle of the valve body 1 and is inclined to the upper right, the cavity 104 and the threaded hole 105 are arranged in sequence at the upper right of the pressure relief port 103, and the front and rear sides or one side of the cavity 104 is an open opening 106. Action: When the water pressure is too large, the valve rod is opened, the elastic member is compressed, and then the water flows out from the pressure relief port, the open cavity, and then from the open opening 106 of the cavity, and the pressure relief work is completed.

[0033] Specifically, the threshold value of the valve body 1 pressure relief can be set in the range of 2 to 9 megapascals. Action: One end of the adjusting screw abuts against the spring, the other end of the spring abuts against one end of the valve rod, the other end of the valve rod is provided with an elastic sealing ring and abuts against the pressure relief port, and the pressure relief valve can withstand by rotating the adjusting screw into or out of the spring to apply or reduce pressure to the spring, and the threshold value in the range of 2 to 9 megapascals can adapt to the use of the wrapped hose, reduce the cost of the hose, and avoid the problem of hose explosion.

[0034] Specifically, the valve body 1 is made of an aluminum alloy. Action: The aluminum alloy has good strength.

[0035] Reference Figure 5The utility model also provides a kind of liquid delivery device, including hose 8, still including the pressure relief valve of any one of the above technical solutions, wherein, hose 8 and the one end or both ends of pressure relief valve are connected by hose joint 9;Liquid delivery device can transport water for photovoltaic module cleaning.The effect is: when liquid delivery device is applied to photovoltaic module cleaning, generally hose 8 is used to transport water for photovoltaic module cleaning, of course, it can also be other liquid.Hose 8 and the liquid delivery device of pressure relief valve composition can constitute photovoltaic module cleaning water supply system (i.e. hose delivery liquid device with pressure relief valve).When the distance of water transport with this hose 8 is several hundred meters, the more reasonable method is to split hose 8 into 30 meters or 50 meters section, then connect with this pressure relief valve, so that the problem of pipe explosion can be basically solved.

[0036] As preferred, hose 8 is yarn-wrapped hose (PVC rubber tube, rubber tube wall has chemical fiber wire), and high-pressure water is transported by yarn-wrapped hose.

[0037] Therefore, the pressure relief valve of the utility model is a small-sized hydraulic pressure relief valve, which can be used for photovoltaic cleaning high-pressure water transportation.

[0038] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A pressure relief valve comprising a valve body (1), characterized in that: The valve body (1) is provided with an inlet (101), an outlet (102) and a leakage port (103), the inlet (101) communicates with the outlet (102) and the leakage port (103); the valve body (1) is provided with an elastic member (2), one end of the elastic member (2) abuts against one end of a valve rod (3), the other end of the valve rod (3) is provided with a dovetail groove (301), the dovetail groove (301) is provided with an elastic sealing ring (7), the elastic sealing ring (7) abuts against the leakage port (103); the place of the valve body (1) for arranging the elastic member (2) and the valve rod (3) is an open cavity (104); the valve body (1) is provided with a threaded hole (105) for arranging an adjusting screw (4), one end of the adjusting screw (4) abuts against one end of the elastic member (2), the other end of the elastic member (2) abuts against one end of the valve rod (3), and the threshold value of pressure relief of the valve body (1) can be adjusted and fixed by the adjusting screw (4).

2. The pressure relief valve of claim 1, wherein: The adjusting screw (4) is provided with a fixing nut (5), and the fixing nut (5) is located on the side of the threaded hole (105) away from the cavity (104).

3. The pressure relief valve of claim 1, wherein: The elastic member (2) is a spring.

4. The pressure relief valve of claim 3, wherein: The adjusting screw (4) is provided with a spring pressing block (6), and the spring pressing block (6) is located on the side of the threaded hole (105) close to the cavity (104); the spring pressing block (6) is fixedly connected with the adjusting screw (4) or is arranged separately.

5. The pressure relief valve of claim 1, wherein: The inlet (101) and the outlet (102) are arranged at the left and right ends of the valve body (1) respectively, the leakage port (103) is arranged in the middle of the valve body (1) and is inclined upward to the right, the cavity (104) and the threaded hole (105) are arranged in the upper right of the leakage port (103) in sequence, and the front and back sides or one side of the cavity (104) is an open opening (106).

6. A pressure relief valve according to any one of claims 1 to 5, characterised in that: The threshold value of pressure relief of the valve body (1) can be set in the range of 2 to 9 MPa.

7. A pressure relief valve according to any one of claims 1 to 5, characterised in that: The valve body (1) is made of an integral aluminum alloy.

8. A liquid delivery device comprising a hose (8), characterised in that: Further comprising the pressure relief valve of any one of claims 1 to 7, wherein the hose (8) is connected to one end or both ends of the pressure relief valve through a hose joint (9); and the liquid delivery device can deliver water for cleaning a photovoltaic module.

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