Safety valve

Abstract

A safety valve comprises a valve body, a water inlet and an inner cavity are formed in the valve body, a water inlet pressure relief assembly is arranged on the inner cavity and divides the inner cavity into a water inlet cavity and a water outlet cavity, the water inlet is communicated with the water inlet cavity, the water inlet pressure relief assembly comprises a support, a cushion block and a valve rod, the support is fixed to the valve body, the valve rod is arranged on the support in a penetrating mode, and the cushion block is arranged on the valve rod in a sleeving mode. 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, and the water outlet cavity communicates with the water inlet cavity through the channel so that internal pressure relief can be achieved. Internal pressure relief and water inflow of the safety valve are completed only through one rubber part and two plastic parts, the number of parts is small, the structure of the safety valve is simplified, the safety valve is more convenient to assemble, production efficiency is improved, and meanwhile cost is lower; by arranging the support, internal pressure relief and water inflow of the safety valve can be completed only through cooperation of the support, cooperation of the valve body is not needed basically, and the structure of the valve body can be made simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, and particularly relates to a safety valve. Background Art

[0002] Chinese Patent Document No. CN217003255U disclosed a safety valve on July 19, 2022, which includes a valve body. An inlet, an inlet chamber, an outlet chamber and an outlet are sequentially arranged and communicated on the valve body. A pressure relief chamber is arranged on one side of the valve body, and the pressure relief chamber is communicated with the inlet chamber. An inlet assembly is arranged in the inlet chamber, and a pressure relief assembly is arranged in the pressure relief chamber. A sewage discharge port is also arranged on the valve body, and the sewage discharge port is communicated with the outlet chamber. A sealing cover is covered on the sewage discharge port; this safety valve realizes water inlet and internal pressure relief through the cooperation of a valve sleeve, an inlet valve core, a gasket and a pressure relief valve rod, but the components used are more, 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 to overcome the deficiencies of the prior art.

[0005] A safety valve designed according to this purpose includes a valve body, and an inlet and an inner cavity are arranged on the valve body. It is characterized in that: a water inlet and pressure relief assembly is arranged on the inner cavity, and the water inlet and pressure relief assembly divides the inner cavity into an inlet chamber and an outlet chamber. The inlet is communicated with the inlet chamber. The water inlet and pressure relief assembly includes a bracket, a cushion block and a valve rod. The bracket is fixed on the valve body, the valve rod is arranged through the bracket, the cushion block is sleeved on the valve rod, and the valve rod presses the cushion block downward under the action of internal liquid pressure, so that a passage is formed in the cushion block, and the outlet chamber is communicated with the inlet chamber through the passage to realize internal pressure relief.

[0006] A protrusion is arranged on the bracket, and the cushion block abuts against the protrusion to close the outlet chamber. A gap is arranged between the bracket and the cushion block. When water enters the inner cavity, the cushion block is pushed upward, so that the cushion block is separated from the protrusion and drives the valve rod to move upward, and then the inlet chamber is communicated with the outlet chamber through the gap.

[0007] A plurality of slits are arranged on the cushion block, and an acting part is arranged on the valve rod. The valve rod presses the cushion block downward through the acting part, so that the slits are opened. When the slits are opened, the passage is formed, and the outlet chamber is communicated with the inlet chamber through the slits.

[0008] One end of the valve rod is provided with a pressure relief head, the cushion block is pressed between the pressure relief head and the protrusion, a plurality of notches are arranged at intervals on the pressure relief head, and a plurality of openings are arranged annularly on the bracket; when the slits are opened, the outlet chamber, the notches, the slits, the openings and the inlet chamber are sequentially communicated.

[0009] The cushion block is provided with a number of depressions, which correspond to the cracks one by one. The crack part is arranged on the depression. When the valve stem presses the cushion block downward, the crack splits through the deformation of the depression.

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

[0011] A first elastic member is sleeved on the valve stem. The first elastic member is located between the pressure relief head and the bracket. The valve stem moves upward to reset under the elastic force of the first elastic member.

[0012] A convex sleeve is arranged at the bottom of the bracket. A second elastic member is sleeved on the convex sleeve and the other end of the valve stem. The second elastic member is located between the other end of the valve stem and the bracket. The valve stem drives the cushion block to move downward to reset under the elastic force of the second elastic member.

[0013] The upper part of the bracket is provided with a positioning edge, the lower part is annularly provided with a number of convex ribs, the inner cavity is provided with a step position and a number of annularly distributed recessed parts. The positioning edge abuts against the step position, and the convex ribs are clamped into the recessed parts to fix the bracket on the valve body.

[0014] The valve body is provided with a water outlet. The water outlet cavity is communicated with the water outlet. A groove is arranged at the bottom of the water outlet, and a flat gasket is arranged on the groove.

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

[0016] The utility model realizes internal pressure relief and water inlet by setting an inlet pressure relief component, which includes a bracket, a cushion block and a valve stem. The valve stem passes through the bracket, the cushion block is sleeved on the valve stem, 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 to open the crack. The water outlet cavity is communicated with the water inlet cavity through the crack to realize internal pressure relief. When water enters the inner cavity, it jacks up the cushion block upward, so that the cushion block disengages from the protrusion and drives the valve stem to move upward. Furthermore, the water inlet cavity is communicated with the water outlet cavity through the gap to realize water inlet. The internal pressure relief and water inlet of the safety valve are completed only by one rubber part (cushion block) and two plastic parts (bracket and valve stem), with fewer parts, which simplifies the structure of the safety valve, makes the assembly of the safety valve more convenient, more suitable for automatic assembly, improves production efficiency, and at the same time has lower cost. In addition, by setting the bracket, the internal pressure relief and water inlet of the safety valve only need the cooperation of the bracket and basically do not need the cooperation of the valve body, so that the structure of the valve body can be made simpler, and thus the processing of the valve body is easier. Description of the Drawings

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

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

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

[0020] Figure 4 This is an exploded view of the spacer block and the valve stem in an embodiment of the present utility model.

[0021] Figure 5 This is a schematic diagram of the overall structure of the bracket in an embodiment of the present utility model. Detailed implementation manners

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Refer to Figures 1-5 , this safety valve includes a valve body 1, an inlet 2 and an inner cavity are provided on the valve body 1, a water inlet and pressure relief assembly is provided on the inner cavity, the water inlet and pressure relief assembly divides the inner cavity into a water inlet cavity 3 and a water outlet cavity 4, the inlet 2 communicates with the water inlet cavity 3, the water inlet and pressure relief assembly includes a bracket 5, a spacer block 6 and a valve stem 7, the bracket 5 is fixed on the valve body 1, the valve stem 7 is inserted through the bracket 5, the spacer block 6 is sleeved on the valve stem 7, when the internal pressure of the container or pipeline exceeds the set value, the valve stem 7 presses the spacer block 6 downward under the action of the internal liquid pressure, so that a passage is formed in the spacer block 6, and the water outlet cavity 4 communicates with the water inlet cavity 3 through the passage to realize 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 22, then sequentially flows into the water inlet cavity 3 through the notch 11, the crack 7 and the opening 12, and finally is discharged through the inlet 2 to realize internal pressure relief; this safety valve is used in various heating containers, such as water heaters, water dispensers, wall-mounted boilers, floor heating equipment, etc., to protect the container and limit the fixed pressure of the container.

[0024] A protrusion 9 is provided on the bracket 5, the spacer block 6 abuts against the protrusion 9 to close the water outlet cavity 4, a gap 14 is provided between the bracket 5 and the spacer block 6, when water enters the inner cavity, it jacks up the spacer block 6 upward, so that the spacer block 6 disengages from the protrusion 9 and drives the valve stem 7 to move upward, and then the water inlet cavity 3 communicates with the water outlet cavity 4 through the gap 14; when the safety valve intakes water, water enters the water inlet cavity 3 through the inlet 2, then passes through the opening 12, then jacks up the spacer block 6 upward, then the water flows into the water outlet cavity 4 through the gap 14, and finally flows into the container through the water outlet 22; the protrusion 9 of the traditional safety valve is provided on the valve body 1, which makes the structure of the valve body 1 more complex, so that the processing of the valve body 1 is more complex. The protrusion 9 of this safety valve is provided on the bracket 5, which simplifies the structure of the valve body 1, so that the processing of the valve body 1 is easier.

[0025] The spacer block 6 is provided with a plurality of slits 8, and an acting portion 26 is provided on the valve stem 6. The valve stem 7 presses the spacer block 6 downward through the acting portion 26 to open the slit 8. When the slit 8 is opened, the described passage is formed, and the water outlet cavity 4 communicates with the water inlet cavity 3 through the slit 8; the acting portion 26 is a step provided at the bottom of the pressure relief head 10.

[0026] A pressure relief head 10 is provided at the upper end of the valve stem 7. The spacer block 6 is pressed between the pressure relief head 10 and the protrusion 9. A plurality of notches 11 are spaced apart on the pressure relief head 10, and a supporting portion 25 is provided between two adjacent notches 11. The supporting portion 25 abuts against the spacer block 6. A plurality of openings 12 are annularly provided on the bracket 5; when the slit 8 is opened, the water outlet cavity 4, the notch 11, the slit 8, the opening 12, and the water inlet cavity 3 are sequentially communicated.

[0027] A plurality of depressions 13 are annularly provided on the spacer block 6, and the depressions 13 correspond to the slits 8 one by one. The slit 8 is partially provided on the depression 13. When the valve stem 7 presses the spacer block 6 downward, the slit 8 cracks through the deformation of the depression 13. The depression 13 allows space for the position of the slit 8 on the spacer block 6 to deform, so that the slit 8 cracks.

[0028] The spacer block 6 is provided with a through hole 15. The spacer block 6 is sleeved on the valve stem 7 through the through hole 15. The slits 8 are annularly distributed around the through hole 15, and the slits 8 are cross-shaped distributed.

[0029] A first elastic member 16 is sleeved on the valve stem 7. The first elastic member 16 is a spring. The first elastic member 16 is located between the pressure relief head 10 and the bracket 5. The valve stem 7 moves upward and resets under the elastic force of the first elastic member 16; after the safety valve performs internal pressure relief, when the pressure inside the container or pipeline is normal, the first elastic member 16 acts on the valve stem 7 to move upward and reset.

[0030] The bottom of the convex sleeve 17 is provided with a supporting portion 27, and the first elastic member 16 is arranged between the acting portion 26 and the supporting portion 27.

[0031] The bottom of the bracket 5 is provided with a convex sleeve 17. A second elastic member 48 is sleeved on the convex sleeve 17 and the lower end of the valve stem 7. The second elastic member 48 is a spring. The second elastic member 48 is located between the lower end of the valve stem 7 and the bracket 5. The valve stem 7 drives the spacer block 6 to move downward and reset under the elastic force of the second elastic member 48. When the safety valve stops admitting water, the valve stem 7 drives the spacer block 6 to move downward and reset under the elastic force of the second elastic member 48.

[0032] A depression 27 is provided at the lower end of the valve stem 7, and a limiting surface 28 is provided at the bottom of the bracket 5. The upper end of the second elastic member 48 abuts against the limiting surface 28, and the lower end of the second elastic member 48 is sleeved in the depression 27.

[0033] The upper part of the bracket 5 is provided with a positioning edge 18, and several convex ribs 19 are annularly arranged at the lower part. A step position 20 and several annularly distributed recessed parts 21 are arranged in the inner cavity. The positioning edge 18 abuts upward against the step position 20, and the convex ribs 19 are snapped into the recessed parts 21 to fix the bracket 5 on the valve body 1.

[0034] An installation hole 29 is provided at the bottom of the convex sleeve 17. The valve stem 7 is arranged through the installation hole 29, and the openings 12 are annularly distributed on the convex sleeve 17.

[0035] A water outlet 22 is provided on the valve body 1. The water outlet cavity 4 communicates with the water outlet 22. A groove 23 is provided at the bottom of the water outlet 22. A flat gasket 24 is provided on the groove 23. An internal thread 30 is provided on the water outlet 22. The water outlet 22 is used for connecting with a connector. The connector is connected to a heating container. An external thread is provided on the connector. The internal thread 30 is in fit connection with the external thread. The flat gasket 24 is used for sealing the gap between the valve body 1 and the connector to prevent water leakage from this gap.

[0036] The spacer block 6 is made of rubber material, and the bracket 5 and the valve stem 7 are made of plastic.

[0037] A first sealing ring 31 is arranged between the bracket 5 and the inner cavity side wall.

[0038] A pressure relief cavity 32 is provided on one side of the valve body 1. The pressure relief cavity 32 communicates with the water outlet cavity 4. An external pressure relief component is arranged in the pressure relief cavity 32. The external pressure relief component includes a pressure relief pull rod 33, a pressure relief valve core 34, a first gasket 35 and a second gasket 36. The first gasket 35 is made of silica gel material. A pressure regulating spring 37 and a pressure regulating wall nut 38 are sleeved on the outer periphery of the pressure relief pull rod 33. One end of the pressure regulating spring 37 elastically acts on the pressure relief valve core 34, and the other end elastically acts on the pressure regulating wall nut 38. The pressure relief pull rod 33 makes a reset movement relative to the valve body 1 under the elastic force of the pressure regulating spring 37 to adjust the medium pressure in the valve body 1. A pressure relief port 38 is provided at the bottom of the pressure relief cavity 32.

[0039] A water sealing cover 39 is arranged at one end of the pressure relief cavity 32. A handle 40 is arranged on one side of the water sealing cover 39. The pressure relief pull rod 33 passes through the water sealing cover 39 and is connected to the handle 40 through a clamping part 41. The handle 40 is fixed on the valve body 1 through a screw 42; a second sealing ring 43 is arranged between the water sealing cover 39 and the valve body 1, a third sealing ring 44 is arranged between the pressure relief pull rod 33 and the water sealing cover 39, and a spacer finger 45 is arranged between the water sealing cover 39 and the handle 40. 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 direction of the handle 40), at this time the water outlet cavity 4 communicates with the pressure relief cavity 32, and water will be discharged from the pressure relief port 38 to reduce the internal pressure of the container so as to play a protective role.

[0040] A pressure relief passage 46 is provided between the water outlet cavity 4 and the pressure relief cavity 32. The insert 47 is clamped on the pressure relief passage 46. The first gasket 35 and the second gasket 36 are arranged between the pressure relief valve core 34 and the insert 47. One end of the insert 47 facing the pressure relief cavity 32 tightly presses the first gasket 35. The insert 47 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 varies. In some places, the water has strong corrosiveness. Coupled with the flow and scouring of the water body, it will corrode the copper main body. By setting the stainless steel insert 47 on the pressure relief passage 46, it can prevent the water from corroding the copper material on the pressure relief passage 46, resulting in water entering the pressure relief cavity 32 from the gap between the side wall of the pressure relief passage 46 and the first gasket 35 under normal water pressure, causing the safety valve to fail.

[0041] 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 safety valve, comprising a valve body (1), the valve body (1) being provided with a water inlet (2) and an inner cavity, characterized in that: A water inlet pressure relief component is provided on the inner cavity. The water inlet pressure relief component divides the inner cavity into a water inlet cavity (3) and a water outlet cavity (4). The water inlet (2) is connected to the water inlet cavity (3). The water inlet pressure relief component comprises a bracket (5), a cushion block (6) and a valve stem (7). The bracket (5) is fixed to the valve body (1). The valve stem (7) is inserted into the bracket (5). The cushion block (6) is sleeved on the valve stem (7). Under the action of the internal liquid pressure, the valve stem (7) presses the cushion block (6) downward to form a passage in the cushion block (6). The water outlet cavity (4) is connected to the water inlet cavity (3) through the passage to achieve internal pressure relief.

2. The safety valve according to claim 1, characterized in that: The support (5) is provided with a protrusion (9), and the cushion block (6) abuts against the protrusion (9) to close the water outlet chamber (4). A gap (14) is provided between the support (5) and the cushion block (6). When water enters the inner chamber, the cushion block (6) is pushed upward to separate the cushion block (6) from the protrusion (9) and drive the valve stem (7) to move upward, thereby connecting the water inlet chamber (3) to the water outlet chamber (4) through the gap (14).

3. The safety valve according to claim 2, characterized in that: A plurality of cracks (8) are provided on the cushion block (6), and an acting portion (26) is provided on the valve stem (7). The valve stem (7) presses the cushion block (6) downwards through the acting portion (26) to open the cracks (8). When the cracks (8) are opened, the passage is formed, and the water outlet chamber (4) is connected to the water inlet chamber (3) through the cracks (8).

4. The safety valve according to claim 3, characterized in that: A pressure relief head (10) is provided at one end of the valve stem (7), a cushion block (6) is pressed between the pressure relief head (10) and the protrusion (9), a plurality of notches (11) are provided at intervals on the pressure relief head (10), and a plurality of openings (12) are provided in an annular shape on the bracket (5); when the crack (8) is opened, the water outlet chamber (4), the notch (11), the crack (8), the opening (12) and the water inlet chamber (3) are connected in sequence.

5. The safety valve according to claim 3, characterized in that: A plurality of depressions (13) are provided on the cushion block (6), the depressions (13) corresponding to the cracks (8) one by one, and the cracks (8) are partially provided on the depressions (13). When the valve stem (7) presses the cushion block (6) downward, the cracks (8) are split open due to the deformation of the depressions (13).

6. The safety valve according to claim 3, characterized in that: A through hole (15) is provided on the cushion block (6), and the cushion block (6) is sleeved on the valve stem (7) through the through hole (15). The cracks (8) are distributed in an annular shape around the through hole (15).

7. The safety valve according to claim 4, characterized in that: A first elastic member (16) is sleeved on the valve stem (7), the first elastic member (16) is located between the pressure relief head (10) and the bracket (5), and the valve stem (7) moves upward to reset under the elastic force of the first elastic member (16); a convex sleeve (17) is provided at the bottom of the bracket (5), and a second elastic member (48) is sleeved on the convex sleeve (17) and the other end of the valve stem (7), the second elastic member (48) is located between the other end of the valve stem (7) and the bracket (5), and the valve stem (7) drives the cushion block (6) to move downward to reset under the elastic force of the second elastic member (48).

8. The safety valve according to claim 1, characterized in that: The bracket (5) is provided with a positioning edge (18) at the upper part and a plurality of convex ribs (19) at the lower part in an annular shape. The inner cavity is provided with a step position (20) and a plurality of annularly distributed recessed portions (21). The positioning edge (18) abuts against the step position (20), and the convex rib (19) is inserted into the recessed portion (21), so that the bracket (5) is fixed on the valve body (1).

9. The safety valve according to claim 1, characterized in that: The valve body (1) is provided with a water outlet (22), the water outlet cavity (4) is connected to the water outlet (22), a groove (23) is provided at the bottom of the water outlet (22), and a flat gasket (24) is provided on the groove (23).

10. The safety valve according to any one of claims 1 to 9, characterized in that: The cushion block (6) is made of rubber material, and the bracket (5) and the valve stem (7) are made of plastic.

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