Explosion relief valve of gas equipment

Abstract

The utility model discloses an explosion relief valve of gas equipment, and particularly relates to the technical field of safety valves, which comprises a valve body, a valve cover mounted at the top end of the valve body, a pressure relief cavity formed in the valve body, a valve rod mounted in the valve cover, a sealing component mounted in the valve body and a limiting mechanism mounted in the valve cover. Two spring seat gaskets are fixedly connected to the outer side of the valve rod, a valve body spring is fixedly connected between the two spring seat gaskets, one spring seat gasket is fixedly connected with the bottom end of the valve rod, and the valve body spring is installed on the outer side of the valve rod. Through the arrangement of the sealing assembly and the limiting mechanism, gaps around the pressure relief cavity can be effectively reduced, gas leakage under normal working pressure is reduced, meanwhile, the adjusted adjusting screw can be limited, and the situation that the adjusting screw changes due to vibration or other external force after adjustment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of safety valve, more specifically, the utility model relates to a kind of explosion-proof safety valve of gas equipment. BACKGROUND

[0002] The explosion-proof safety valve of gas equipment is an important component to ensure the safe operation of gas equipment, which can automatically open when the internal pressure of the equipment exceeds the set value, releasing the overpressure gas to prevent the equipment from being damaged or causing an explosion accident.

[0003] The existing safety valve cannot conveniently adjust the resistance generated in the valve when in use, and the valve body is easily damaged under high pressure, reducing the use safety of the safety valve.

[0004] According to the search, the Chinese patent with publication number CN214466376U discloses an explosion-proof safety valve. By setting the control box, the rotating rod, and the knob, when the knob is rotated, the rotating rod is rotated through the meshing between the first bevel gear and the second bevel gear. The position of the valve rod in the vertical direction can be adjusted through the threaded connection between the bottom end of the rotating rod and the top end of the valve rod, thereby adjusting the pressure inside the valve body to achieve better use effect.

[0005] When the above-mentioned explosion-proof safety valve is actually used, the valve body spring presses down the valve disc to seal the pressure relief cavity inside the valve body. However, the single valve disc has poor sealing effect when sealing the pressure relief cavity. Over a long period of use, the gas medium may leak out from the gap between the valve disc and the pressure relief cavity, causing the pressure inside the system to drop, disrupting the pressure balance, and causing pressure fluctuations. SUMMARY

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an explosion-proof safety valve for gas equipment to solve the problems raised in the above background.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] An explosion-proof safety valve for gas equipment includes a valve body, a valve cover installed at the top end of the valve body, a pressure relief cavity formed inside the valve body, a valve rod installed inside the valve cover, a sealing assembly installed inside the valve body, a limiting mechanism installed inside the valve cover, two spring seat washers fixedly connected to the outer side of the valve rod, a valve body spring fixedly connected between the two spring seat washers, and one of the spring seat washers is fixedly connected to the bottom end of the valve rod.

[0009] By adopting the technical scheme, the gas leakage under normal working pressure can be reduced, and the opening pressure of the valve body spring can be kept at a set value.

[0010] As a further description of the technical scheme, the sealing assembly comprises a protruding ring, the valve body is internally provided with a pressing groove, the protruding ring is fixedly connected to the inner side of the pressing groove, a pressing base is fixedly connected to the inner side of the valve body, a first sealing ring is fixedly connected to the top end of the pressing base, a valve flap is fixedly connected to the bottom end of the valve rod, a second sealing ring and a sealing cylinder are fixedly connected to the bottom end of the valve flap, the second sealing ring is mounted on the outer side of the sealing cylinder, and a sealing ring is fixedly connected to the bottom end of the sealing cylinder and is clamped to the outer side of the protruding ring.

[0011] By adopting the technical scheme, the sealing effect of the outer side of the pressure relief cavity can be improved, the pressure fluctuation caused by leakage can be reduced, and the normal operation of the gas equipment and pipeline can be protected.

[0012] As a further description of the technical scheme, the limiting mechanism comprises a valve cap, the valve cap is mounted on the top end of the valve cover, a bidirectional screw rod is rotatably connected to the inner side of the valve cap, a rotating knob is fixedly connected to one end of the bidirectional screw rod, two inserting rods are threadedly connected to the outer side of the bidirectional screw rod, an adjusting screw is threadedly connected to the inner side of the valve cover, a plurality of clamping grooves are formed in the top end of the adjusting screw, and the clamping grooves are clamped to one side of the bidirectional screw rod.

[0013] By adopting the technical scheme, the adjusting screw after adjustment can be limited, and loosening of the adjusting screw caused by external force can be reduced.

[0014] The technical effects and advantages of the utility model are as follows:

[0015] 1. By arranging the sealing assembly, compared with the prior art, the second sealing ring is tightly attached to the first sealing ring by pressing the valve flap, the sealing ring in the sealing cylinder is inserted outside the protruding ring, the sealing effect of the pressure relief cavity is improved, the gap between the pressure relief cavity and the surrounding parts is effectively reduced, the gas leakage under normal working pressure is reduced, the pressure fluctuation caused by leakage is reduced, and the normal operation of the gas equipment and pipeline is protected.

[0016] 2. By arranging the limiting mechanism, compared with the prior art, the two inserting rods are used to limit the adjusting screw after adjustment, the adjusting screw is prevented from changing due to vibration or other external force after adjustment, and the opening pressure of the valve body spring is kept at a set value. DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2This is a cross-sectional view of the valve cover of this utility model.

[0019] Figure 3 This is a cross-sectional view of the valve body of this utility model.

[0020] Figure 4 This is a partial structural diagram of the valve stem connection of this utility model.

[0021] Figure 5 For the present utility model Figure 2 Enlarged view of the structure of part A in the middle.

[0022] Figure 6 For the present utility model Figure 2 Enlarged view of the structure of part B.

[0023] The attached figures are labeled as follows: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Spring seat washer; 5. Valve body spring; 6. Raised ring; 7. Lower pressure base; 8. First sealing ring; 9. Valve disc; 10. Second sealing ring; 11. Sealing cylinder; 12. Sealing ring; 13. Valve cap; 14. Double-acting screw; 15. Knob; 16. Adjusting screw; 17. Pressure relief chamber; 18. Lower pressure groove; 19. Slot; 20. Insert rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The embodiments disclosed in this application are as follows: Figures 1-6 The explosion-proof safety valve for a gas device shown includes a valve body 1, a valve cover 2 mounted on the top of the valve body 1, a pressure relief chamber 17 inside the valve body 1, a valve stem 3 inside the valve cover 2, a sealing assembly inside the valve body 1, a limit mechanism inside the valve cover 2, two spring seat pads 4 fixedly connected to the outside of the valve stem 3, and a valve body spring 5 fixedly connected between the two spring seat pads 4. One of the spring seat pads 4 is fixedly connected to the bottom end of the valve stem 3. The valve body spring 5 is mounted on the outside of the valve stem 3. The opening pressure of the safety valve can be set by the valve body spring 5. The valve stem 3 can drive the valve disc 9 to move downward so that the sealing assembly can improve the sealing effect on the top of the pressure relief chamber 17 and reduce gas leakage.

[0026] Reference Figure 3 and 5As shown, the sealing assembly includes a convex ring 6, a lower pressing groove 18 is arranged in the valve body 1, the convex ring 6 is fixedly connected with the inside of the lower pressing groove 18, a lower pressing base 7 is fixedly connected in the valve body 1, a first sealing ring 8 is fixedly connected at the top end of the lower pressing base 7, a valve flap 9 is fixedly connected at the bottom end of the valve rod 3, a second sealing ring 10 and a sealing cylinder 11 are fixedly connected at the bottom end of the valve flap 9, the second sealing ring 10 is installed outside the sealing cylinder 11, a sealing ring 12 is fixedly connected at the bottom end of the sealing cylinder 11, the inside of the sealing ring 12 is clamped with the outside of the convex ring 6, the valve flap 9 can drive the second sealing ring 10 and the sealing cylinder 11 to move downward, and the valve rod 3 is continuously pressed downward, so that the valve flap 9 pushes the second sealing ring 10 to extrude the first sealing ring 8 at the top end of the lower pressing base 7, the first sealing ring 8 is tightly attached with the second sealing ring 10, the sealing condition is provided, and the sealing ring 12 inside the sealing cylinder 11 can be inserted into the outside of the convex ring 6, so that the gap between the pressure relief cavity 17 around is reduced, the gas leakage under normal working pressure is reduced, and the normal operation of the gas equipment and its pipeline is protected.

[0027] Referring to Figure 6 As shown, the limiting mechanism includes a valve cap 13, the valve cap 13 is installed at the top end of the valve cover 2, a bidirectional screw rod 14 is rotatably connected inside the valve cap 13, a rotating knob 15 is fixedly connected at one end of the bidirectional screw rod 14, two plug rods 20 are screwedly connected outside the bidirectional screw rod 14, an adjusting screw 16 is screwedly connected inside the valve cover 2, a plurality of clamping grooves 19 are arranged at the top end of the adjusting screw 16, the clamping grooves 19 are clamped with one side of the bidirectional screw rod 14, and after the adjusting screw 16 is adjusted, the opposite threads outside the bidirectional screw rod 14 can drive the two plug rods 20 to relatively move, so that the two plug rods 20 can be inserted into the two clamping grooves 19 at the top end of the adjusting screw 16, thereby limiting the adjusting screw 16, and the adjusting screw 16 remains stable after adjustment, and the change caused by vibration or other external force after adjustment is reduced.

[0028] The utility model discloses a kind of explosion-proof safety valves of gas equipment, and specific structure is as follows: Figures 1-6As shown, in the technical scheme, when the pre-tightening force of the valve body spring 5 needs to be adjusted, first, the adjusting screw 16 is rotated, the adjusting screw 16 is screwed with the inside of the valve cover 2, when the adjusting screw 16 is rotated downward, the spring seat washer 4 at the bottom end of the adjusting screw 16 is pressed downward to move, so that the spring seat washer 4 at the top is pressed to adjust the pre-tightening force of the valve body spring 5, and the spring seat washer 4 at the bottom moves the valve rod 3 downward, then when the adjusting screw 16 is adjusted, the valve cap 13 is placed outside the adjusting screw 16, and the knob 15 is rotated to rotate the bidirectional screw rod 14, the opposite threads on the outside of the bidirectional screw rod 14 can drive the two insertion rods 20 to move relatively, so that the two insertion rods 20 can be inserted into the clamping groove 19 to limit and fix the adjusting screw 16, when the valve rod 3 moves downward, the bottom end of the valve rod 3 moves the valve flap 9 downward, and the valve flap 9 moves the second sealing ring 10 and the sealing cylinder 11 downward, the continuous pressing force of the valve rod 3 makes the valve flap 9 press the first sealing ring 8 on the top of the pressing base 7, so that the second sealing ring 10 and the first sealing ring 8 are tightly attached, and the valve flap 9 can insert the sealing cylinder 11 into the pressing groove 18, so that the sealing ring 12 in the sealing cylinder 11 can be inserted outside the convex ring 6, so as to improve the sealing effect of the pressure relief cavity 17.

[0029] In the drawings of the utility model, only the structures related to the embodiments of the utility model are involved, other structures can be referred to the general design, and the same embodiments and different embodiments of the utility model can be combined with each other under the condition of no conflict.

[0030] The contents not described in detail in the specification all belong to the prior art known by those skilled in the art, and the model parameters of various appliances are not limited specifically, and conventional equipment can be used, in the technical scheme, the appliance control elements not mentioned belong to the prior art, so they are not shown in the drawings, and will not be described here.

[0031] Finally, the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An explosion-proof safety valve for gas equipment comprising a valve body (1), characterised in that: The valve body (1) top end is equipped with valve cover (2), the valve body (1) inside is equipped with pressure relief chamber (17), the valve cover (2) inside is equipped with valve stem (3), the valve body (1) inside is equipped with sealing assembly, the valve cover (2) inside is equipped with limit mechanism, the valve stem (3) outside is fixedly connected with two spring seat gasket (4), two spring seat gasket (4) between fixedly connected with valve body spring (5), one spring seat gasket (4) and valve stem (3) bottom end fixedly connected, the valve body spring (5) is installed on the outer side of valve stem (3).

2. The explosion-proof safety valve of a gas apparatus according to claim 1, characterized by: The sealing assembly includes a convex ring (6), the valve body (1) inside is equipped with a pressing groove (18), the convex ring (6) is fixedly connected with the inside of the pressing groove (18), the valve body (1) inside is fixedly connected with the pressing base (7), the pressing base (7) top end is fixedly connected with the first sealing ring (8).

3. The explosion-proof safety valve of a gas apparatus according to claim 1, characterized by: The valve stem (3) bottom end is fixedly connected with valve clack (9), the valve clack (9) bottom end is fixedly connected with the second sealing ring (10) and sealing cylinder (11), the second sealing ring (10) is installed on the outer side of sealing cylinder (11).

4. The explosion-proof safety valve of a gas apparatus according to claim 3, characterized by: The sealing cylinder (11) bottom end is fixedly connected with sealing ring (12), the sealing ring (12) inside and the convex ring (6) outside is connected.

5. The explosion-proof safety valve for gas equipment according to claim 1, characterized in that: The limit mechanism includes valve cap (13), the valve cap (13) is installed on the valve cover (2) top end, the valve cap (13) inside is rotatably connected with two-way screw rod (14), the two-way screw rod (14) one end is fixedly connected with knob (15).

6. The explosion relief valve for gas equipment according to claim 5, characterized in that: The two-way screw rod (14) outside is threadedly connected with two plug rod (20), the valve cover (2) inside is threadedly connected with adjusting screw (16).

7. The explosion relief valve for gas equipment according to claim 6, characterized in that: The adjusting screw (16) top end is equipped with a plurality of clamping groove (19), the clamping groove (19) and two-way screw rod (14) one side is connected.

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