Pressure relief safety valve

Abstract

A pressure relief safety valve comprises a valve body, a water inlet, a water inlet cavity and a water outlet cavity are formed in the valve body, the water inlet is communicated with the water inlet cavity, a cushion block used for sealing the water outlet cavity is arranged in the water outlet cavity, a valve rod is arranged on the cushion block in a penetrating mode, and the valve rod downwards extrudes the cushion block under the action of internal liquid pressure so that a channel can be formed in the cushion block. The water outlet cavity is communicated with the water inlet cavity through a passage to realize internal pressure relief. The cushion block is arranged in the water outlet cavity of the valve body, the valve rod penetrates through the cushion block, the gaps are formed in the cushion block, the valve rod downwards extrudes the cushion block under the action of internal liquid pressure so that the gaps can be opened, the water outlet cavity is communicated with the water inlet cavity through the gaps, internal pressure relief is achieved, and when water enters the valve body, the cushion block is upwards jacked up so that the cushion block can be disengaged from the protrusion. Internal pressure relief and water inflow of the pressure relief safety valve are completed only through one rubber part and one plastic part, the number of parts is small, and the structure of the pressure relief safety valve is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a pressure relief safety valve. Background Art

[0002] Chinese Patent Document No. CN210716057U disclosed a flow regulating safety valve on June 9, 2020, which includes a flow regulating safety valve body. An inlet chamber, an inlet and an outlet are provided on the flow regulating safety valve body. The inlet chamber is in communication with the inlet. An inlet assembly and a pressure relief assembly are provided in the inlet chamber. The inlet assembly includes an inlet spring and an inlet valve core. The pressure relief assembly includes a pressure relief spring and a pressure relief valve rod. A flow regulating chamber is provided on the flow regulating safety valve body. The flow regulating chamber is respectively in communication with the inlet chamber and the outlet. A pressure regulating valve core is provided in the flow regulating chamber. A through hole is provided on the flow regulating safety valve body. The through hole is in communication with the flow regulating chamber. A flow regulating knob for adjusting the diameter of the pressure regulating valve core is installed on the through hole. The flow regulating knob is connected to the pressure regulating valve core. The flow regulating safety valve realizes water inlet and internal pressure relief through the cooperation of a valve sleeve, an inlet valve core, a first flat gasket and a pressure relief valve rod. However, the number of components involved is relatively large, resulting in a complex structure, high cost and inconvenient assembly.

[0003] Therefore, it is necessary to make further improvements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pressure relief safety valve with simple structure, convenient assembly, low cost, few components and strong practicability, so as to overcome the deficiencies of the prior art.

[0005] A pressure relief safety valve designed according to this purpose includes a valve body. An inlet, an inlet chamber and an outlet chamber are provided on the valve body. The inlet is in communication with the inlet chamber. It is characterized in that: a cushion block for closing the outlet chamber is provided in the outlet chamber. A valve rod passes through the cushion block. The valve rod presses the cushion block downward under the action of internal liquid pressure, so as to form a passage in the cushion block. The outlet chamber is in communication with the inlet chamber through the passage to realize internal pressure relief.

[0006] A protrusion is provided at the bottom of the outlet chamber. The cushion block abuts against the protrusion to close the outlet chamber. When water enters the valve body, it jacks up the cushion block upward, so that the cushion block disengages from the protrusion and drives the valve rod to move upward, thereby connecting the inlet chamber with the outlet chamber.

[0007] A number of slits are provided on the cushion block. A acting part is provided on the valve rod. The valve rod presses the cushion block downward through the acting part, so as to open the slits. When the slits are opened, the passage is formed. The outlet chamber is in communication with the inlet chamber through the slits.

[0008] One end of the valve stem is provided with a pressure relief head, which is located in the water outlet cavity. A number of first notches are arranged at intervals on the pressure relief head. The pressure relief head abuts against the cushion block, and the cushion block is located between the pressure relief head and the protrusion. When the crack opens, the water outlet cavity, the first notch, the crack and the water inlet cavity are communicated in sequence.

[0009] A number of depressions are arranged on the cushion block, and the depressions correspond to the cracks one by one. Part of the crack is arranged on the depression. When the valve stem presses the cushion block downward, the crack cracks through the deformation of the depression.

[0010] The cushion block is provided with a through hole, the valve stem is arranged through the through hole, and the cracks are annularly distributed around the through hole.

[0011] A number of second notches are annularly distributed around the cushion block. When the cushion block disengages from the protrusion, the water inlet cavity is communicated with the water outlet cavity through the second notches.

[0012] One end of the valve stem is sleeved with a first elastic member, and the first elastic member is located between the valve stem and the valve body. The valve stem moves upward and resets under the elastic force of the first elastic member.

[0013] The other end of the valve stem is arranged in the water inlet cavity. The other end of the valve stem is sleeved with a second elastic member, and the second elastic member is located between the valve stem and the valve body. The valve stem drives the cushion block to move downward and reset under the elastic force of the second elastic member.

[0014] The valve body is provided with a water outlet, the water outlet cavity is communicated with the water outlet, and a sealing gasket is arranged between the water outlet cavity and the water outlet. A flat gasket is arranged between the sealing gasket and the valve body.

[0015] The cushion block is made of rubber material, and the valve stem is made of plastic.

[0016] In the utility model, by arranging a cushion block in the water outlet cavity of the valve body, the valve stem is arranged through the cushion block, and a number of cracks are arranged on the cushion block. The valve stem presses the cushion block downward under the action of the internal liquid pressure, so that the crack opens, and the water outlet cavity is communicated with the water inlet cavity through the crack to realize internal pressure relief. When water enters the valve body, it jacks up the cushion block upward, so that the cushion block disengages from the protrusion and drives the valve stem to move upward, thereby enabling the water inlet cavity to be communicated with the water outlet cavity to realize water inlet. The internal pressure relief and water inlet of the pressure relief safety valve are completed only by one rubber part (cushion block) and one plastic part (valve stem), with fewer parts, which simplifies the structure of the pressure relief safety valve, makes the assembly of the pressure relief safety valve more convenient, is more suitable for automated assembly, improves production efficiency, and has lower cost at the same time. Description of the Drawings

[0017] Figure 1 It is an exploded view of the pressure relief safety valve in an embodiment of the utility model.

[0018] Figure 2 It is a cross-sectional view of the pressure relief safety valve in an embodiment of the utility model.

[0019] Figure 3 This is a schematic diagram of the overall structure of the pressure relief safety valve in an embodiment of the present utility model.

[0020] Figure 4 This is a schematic exploded view of the cushion block and the valve stem in an embodiment of the present utility model. Detailed implementation manners

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Refer to Figures 1 - 4 , this pressure relief safety valve includes a valve body 1, on which there are a water inlet 2, a water inlet cavity 3 and a water outlet cavity 4. The water inlet 2 is communicated with the water inlet cavity 3. Inside the water outlet cavity 4 (at the bottom), there is a cushion block 5 for closing the water outlet cavity 4. The cushion block 5 is a rubber pad, and a valve stem 6 is penetrated through the cushion block 5. When the internal pressure of the container or pipeline exceeds the set value, the valve stem 6 presses the cushion block 5 downward under the action of the internal liquid pressure, so as to form a passage inside the cushion block 5, and the water outlet cavity 4 is communicated with the water inlet cavity 3 through the passage to achieve internal pressure relief; specifically, as Figure 2 shown by the arrow, the liquid in the container flows into the water outlet cavity 4 through the water outlet 16, then successively flows into the water inlet cavity 3 through the first notch 10 and the crack 7, and finally is discharged through the water inlet 2 to achieve internal pressure relief; this pressure relief safety valve is used in various heating containers, such as water heaters, water dispensers, wall-mounted boilers, floor heating equipment, etc., to play a role in protecting the container and limiting the fixed pressure of the container.

[0023] There is a protrusion 8 at the bottom of the water outlet cavity 4, and the cushion block 5 abuts against the protrusion 8 to close the water outlet cavity 4. When water enters the valve body 1, it pushes the cushion block 5 upward, so that the cushion block 5 disengages from the protrusion 8 and drives the valve stem 6 to move upward, thereby enabling the water inlet cavity 3 to be communicated with the water outlet cavity 4; when the pressure relief safety valve intakes water, water enters the water inlet cavity 3 through the water inlet 2, then flows to the bottom of the water outlet cavity 4, then pushes the cushion block 5 upward, and then the water flows into the water outlet cavity 4 through the second notch 13, and finally flows into the container through the water outlet 16.

[0024] There are several cracks 7 on the cushion block 5, and there is an acting part 22 on the valve stem 6. The valve stem 6 presses the cushion block 5 downward through the acting part 22, so that the crack 7 is opened. When the crack 7 is opened, the above-mentioned passage is formed, and the water outlet cavity 4 is communicated with the water inlet cavity 3 through the crack 7. The acting part 22 is a step provided at the bottom of the pressure relief head 9.

[0025] A pressure relief head 9 is provided at the upper end of the valve stem 6. The pressure relief head 9 is located inside the water outlet cavity 4 and above the cushion block 5. There are several first notches 10 spaced on the pressure relief head 9. A supporting part 19 is provided between two adjacent first notches 10. The supporting part 19 abuts against the cushion block 5. The cushion block 5 is located between the pressure relief head 9 and the protrusion 8; when the crack 7 is opened, the water outlet cavity 4, the first notch 10, the crack 7 and the water inlet cavity 3 are communicated in sequence.

[0026] A number of depressions 11 are annularly arranged on the spacer block 5, and the depressions 11 correspond to the cracks 7 one by one. A part of the crack 7 is arranged on the depression 11. When the valve stem 6 presses the spacer block 5 downward, the crack 7 cracks through the deformation of the depression 11. The depression 11 allows space for the position of the crack 7 on the spacer block 5 to deform, so that the crack 7 cracks.

[0027] A through hole 12 is arranged on the spacer block 5, and the valve stem 6 is arranged through the through hole 12. The cracks 7 are annularly distributed around the through hole 12, and the cracks 7 are cross-shaped distributed.

[0028] A number of second notches 13 are annularly distributed around the spacer block 5. When the spacer block 5 is separated from the protrusion 8, the water inlet cavity 3 communicates with the water outlet cavity 4 through the second notches 13.

[0029] A first elastic member 14 is sleeved on the upper end of the valve stem 6. The first elastic member 14 is a spring. The first elastic member 14 is located between the valve stem 6 and the valve body 1. The valve stem 6 moves upward and resets under the elastic force of the first elastic member 14. After the pressure relief safety valve performs internal pressure relief, when the pressure inside the container or pipeline is normal, the first elastic member 14 acts on the valve stem 6 to move upward and reset.

[0030] An extension part 20 is arranged on the inner wall of the valve body 1, and the protrusion 8 is arranged on the extension part 20. The extension part 20 divides the inner part of the valve body 1 into a water inlet cavity 3 and a water outlet cavity 4. One end of the extension part 20 is provided with a protruding part 21, and the first elastic member 14 is arranged between the protruding part 21 and the acting part 22.

[0031] The lower end of the valve stem 6 is arranged in the water inlet cavity 3. A second elastic member 15 is sleeved on the lower end of the valve stem 6. The second elastic member 15 is a spring. The second elastic member 15 is located between the valve stem 6 and the valve body 1. When the pressure relief safety valve stops admitting water, the valve stem 6 drives the spacer block 5 to move downward and reset under the elastic force of the second elastic member 15.

[0032] A depression 23 is arranged at the lower end of the valve stem 6. The upper end of the second elastic member 15 abuts against the extension part 20, and the lower end of the second elastic member 15 is clamped and sleeved in the depression 23.

[0033] A water outlet 16 is arranged on the valve body 1. The water outlet cavity 4 communicates with the water outlet 16. A gasket 17 is arranged between the water outlet cavity 4 and the water outlet 16. A flat gasket 18 is arranged between the gasket 17 and the valve body 1. An internal thread 24 is arranged on the water outlet 16. The water outlet 16 is used to connect with a connector. The connector is connected to a heating container. An external thread is arranged on the connector. The internal thread 24 is in threaded connection with the external thread. The flat gasket 18 is used to seal the gap between the valve body 1 and the connector to prevent water leakage from this gap.

[0034] The spacer block 5 is made of rubber material, and the valve stem 6 is made of plastic.

[0035] One side of the valve body 1 is provided with a pressure relief chamber 25, the pressure relief chamber 25 is communicated with the water outlet chamber 4, an external pressure relief component is arranged in the pressure relief chamber 25, the external pressure relief component includes a pressure relief pull rod 26, a pressure relief valve core 27, a first gasket 28 and a second gasket 29, the first gasket 28 is made of silica gel material, a pressure regulating spring 30 and a pressure regulating wall nut 31 are sleeved on the outer periphery of the pressure relief pull rod 26, one end of the pressure regulating spring 30 elastically acts on the pressure relief valve core 27 and the other end elastically acts on the pressure regulating wall nut 31, the pressure relief pull rod 26 makes a reset movement relative to the valve body 1 under the elastic force of the pressure regulating spring 30 to adjust the medium pressure in the valve body 1, and a pressure relief port 41 is arranged at the bottom of the pressure relief chamber 25.

[0036] A water sealing cover 32 is arranged at one end of the pressure relief chamber 25, a handle 33 is arranged on one side of the water sealing cover 32, the pressure relief pull rod 26 passes through the water sealing cover 32 and is connected with the handle 33 through a clamping part 34, and the handle 33 is fixed on the valve body 1 through a screw 35; a first sealing ring 36 is arranged between the water sealing cover 32 and the valve body 1, a second sealing ring 37 is arranged between the pressure relief pull rod 26 and the water sealing cover 32, and a dielectric finger 38 is arranged between the water sealing cover 32 and the handle 33. When the pressure in the heating container exceeds a certain value, the internal pressure will push open the external pressure relief component. As the external pressure relief component moves (the external pressure relief component moves towards the handle 33), at this time, the water outlet chamber 4 is communicated with the pressure relief chamber 25, and water will be discharged from the pressure relief port 41 to reduce the internal pressure of the container so as to play a protective role.

[0037] A pressure relief channel 39 is arranged between the water outlet chamber 4 and the pressure relief chamber 25, an insert 40 is clamped on the pressure relief channel 39, the first gasket 28 and the second gasket 29 are arranged between the pressure relief valve core 27 and the insert 40, and one end of the insert 40 facing the pressure relief chamber 25 tightly presses the first gasket 28; the insert 40 is made of stainless steel material and has good corrosion resistance. The valve body 1 is made of copper material. The water quality in different regions is different, and the water in some places is more corrosive. Coupled with the flow and scouring of the water body, it will corrode the copper main body. By arranging the stainless steel insert 40 on the pressure relief channel 39, it can prevent the water from corroding the copper material on the pressure relief channel 39, resulting in water entering the pressure relief chamber 25 from the gap between the side wall of the pressure relief channel 39 and the first gasket 28 under normal water pressure, causing the safety valve to fail.

[0038] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure relief safety valve, comprising a valve body (1), the valve body (1) being provided with a water inlet (2), a water inlet chamber (3) and a water outlet chamber (4), the water inlet (2) being connected to the water inlet chamber (3), characterized in that: A cushion block (5) for closing the water outlet chamber (4) is arranged in the water outlet chamber (4), and a valve stem (6) is passed through the cushion block (5). The valve stem (6) presses the cushion block (5) downward under the action of the internal liquid pressure, so that a passage is formed in the cushion block (5), and the water outlet chamber (4) is connected to the water inlet chamber (3) through the passage, so as to achieve internal pressure relief.

2. The pressure relief safety valve according to claim 1, characterized in that: A protrusion (8) is provided at the bottom of the water outlet chamber (4), and a cushion block (5) abuts against the protrusion (8) to close the water outlet chamber (4). When water enters the valve body (1), the cushion block (5) is pushed upward, so that the cushion block (5) is separated from the protrusion (8) and drives the valve stem (6) to move upward, thereby connecting the water inlet chamber (3) to the water outlet chamber (4).

3. The pressure relief safety valve according to claim 2, characterized in that: A plurality of slits (7) are provided on the cushion block (5), and an acting portion (22) is provided on the valve stem (6). The valve stem (6) presses the cushion block (5) downwards through the acting portion (22) to open the slits (7). When the slits (7) are opened, the passage is formed, and the water outlet chamber (4) is connected to the water inlet chamber (3) through the slits (7).

4. The pressure relief safety valve according to claim 3, characterized in that: A pressure relief head (9) is provided at one end of the valve stem (6). The pressure relief head (9) is located in the water outlet chamber (4). A plurality of first notches (10) are provided at intervals on the pressure relief head (9). The pressure relief head (9) abuts against a cushion block (5). The cushion block (5) is located between the pressure relief head (9) and the protrusion (8). When the crack (7) is opened, the water outlet chamber (4), the first notch (10), the crack (7) and the water inlet chamber (3) are connected in sequence.

5. The pressure relief safety valve according to claim 3, characterized in that: A plurality of depressions (11) are provided on the cushion block (5), the depressions (11) corresponding to the cracks (7) one by one, and the cracks (7) are partially provided on the depressions (11). When the valve stem (6) presses the cushion block (5) downward, the cracks (7) are split open due to the deformation of the depressions (11).

6. The pressure relief safety valve according to claim 3, characterized in that: A through hole (12) is provided on the cushion block (5), the valve stem (6) is inserted through the through hole (12), and the cracks (7) are distributed in an annular shape around the through hole (12).

7. The pressure relief safety valve according to claim 2, characterized in that: A plurality of second notches (13) are distributed in an annular pattern around the cushion block (5); when the cushion block (5) is separated from the protrusion (8), the water inlet chamber (3) is connected to the water outlet chamber (4) through the second notches (13).

8. The pressure relief safety valve according to claim 1, characterized in that: One end of the valve stem (6) is sleeved with a first elastic member (14), the first elastic member (14) being located between the valve stem (6) and the valve body (1), and the valve stem (6) moves upward to reset under the elastic force of the first elastic member (14); the other end of the valve stem (6) is arranged in the water inlet chamber (3), the other end of the valve stem (6) is sleeved with a second elastic member (15), the second elastic member (15) being located between the valve stem (6) and the valve body (1), and the valve stem (6) drives the cushion block (5) to move downward to reset under the elastic force of the second elastic member (15).

9. The pressure relief safety valve according to claim 1, characterized in that: A water outlet (16) is provided on the valve body (1), the water outlet cavity (4) is connected to the water outlet (16), a sealing gasket (17) is provided between the water outlet cavity (4) and the water outlet (16), and a flat gasket (18) is provided between the sealing gasket (17) and the valve body (1).

10. The pressure relief safety valve according to any one of claims 1 to 9, characterized in that: The cushion block (5) is made of rubber material, and the valve stem (6) is made of plastic.

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