CN213839709U

CN213839709U - Safety cut-off valve

Info

Publication number: CN213839709U
Application number: CN202022398020.2U
Authority: CN
Inventors: 汤永成
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-07-30
Anticipated expiration: 2030-10-23

Abstract

The utility model relates to the technical field of cut-off valves, in particular to a safety cut-off valve, which comprises a valve body and an elastic piece; the valve body is hermetically connected with the elastic part to form an air cavity; an air inlet channel and an air outlet channel are arranged in the valve body; the air outlet channel is communicated with the air cavity; an anti-overflowing cavity is arranged in the valve body; the overflow-preventing cavity is provided with an air inlet communicated with the air inlet channel and an air outlet communicated with the air outlet channel; a valve core is movably arranged in the overflow-preventing cavity; one end of the valve core is provided with a blocking block; the other end of the valve core penetrates through the anti-overflowing cavity and then abuts against the elastic piece; a first sealing element and a second sealing element are arranged in the overflowing preventing cavity; the stop block is movably arranged between the first sealing element and the second sealing element. The utility model discloses a cavity, first sealing member, second sealing member and case are prevented overflowing in the setting for when the gas overflows or pressure is too big, first sealing member is sealed with the case, prevents that the gas from overflowing and causing the accident.

Description

Safety cut-off valve

Technical Field

The utility model relates to a trip valve technical field, concretely relates to safety trip valve.

Background

Along with the popularization and use of gas in family life, fire accidents caused by explosion of a gas meter due to gas overflow and sudden rise and overpressure of gas supply pressure sometimes occur, so that not only the property of a family is greatly lost, but also the life safety of people is greatly threatened. The reason of causing fire accident is that besides the reason of using, there is no automatic air-break device on the existing air supply pipeline, it is also an important reason, especially the fire accident caused by gauge explosion because of the sudden rise of air supply pressure and overpressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a safety shut-off valve aiming at the above-mentioned not enough among the prior art.

The purpose of the utility model is realized through the following technical scheme: a safety shut-off valve comprises a valve body and an elastic piece; the valve body is hermetically connected with the elastic part to form an air cavity; an air inlet channel and an air outlet channel are arranged in the valve body; the air outlet channel is communicated with the air cavity; an anti-overflowing cavity is arranged in the valve body; the overflow-preventing cavity is provided with an air inlet communicated with the air inlet channel and an air outlet communicated with the air cavity; a valve core is movably arranged in the overflow-preventing cavity; one end of the valve core is provided with a blocking block; the other end of the valve core penetrates through the anti-overflowing cavity and then abuts against the elastic piece; a first sealing element and a second sealing element are arranged in the overflowing preventing cavity; the stop block is movably arranged between the first sealing element and the second sealing element.

The utility model is further arranged that the first sealing element and the second sealing element are respectively arranged at the top part in the overflow-proof cavity and the bottom part in the overflow-proof cavity; when the blocking block abuts against the first sealing element, the air outlet is sealed; when the blocking block abuts against the second sealing element, the air inlet is sealed.

The utility model is further arranged in that the gas outlet comprises a gas outlet groove arranged on the inner wall of the flow-preventing cavity and a gas outlet hole communicated with the gas outlet groove; the air outlet is arranged at the opening of the anti-overflowing cavity; the air outlet groove and the valve core are arranged at intervals;

the air inlet is arranged at the bottom of the valve core.

The utility model is further arranged that the elastic part is provided with a sealing screw and a sealing nut; one end of the sealing screw is abutted against the other end of the valve core; the other end of the sealing screw penetrates through the elastic piece and then is connected with the sealing nut.

The utility model is further arranged that the elastic part comprises a deformation part and a sealing part arranged around the deformation part; the sealing part is connected with the valve body in a sealing way; the deformation part is arranged on the sealing screw and the sealing nut.

The utility model is further arranged in that the safety cut-off valve also comprises a top cover connected with the valve body; the elastic piece is arranged between the valve body and the top cover; the sealing part is arranged at the joint of the valve body and the top cover; a reset component used for enabling the elastic piece to reset is arranged in the top cover.

The utility model discloses further set up to, reset assembly is including locating the first locating plate at deformation portion top, locating the second locating plate at top in the top cap and locating the reset spring between first locating plate and the second locating plate.

The utility model is further provided with that the safety cut-off valve also comprises an adjusting cap and an adjusting screw; the top of the top cover is provided with a first internal thread; the adjusting cap is provided with an adjusting rod; a first external thread matched with the first internal thread is arranged on the periphery of the adjusting rod; a second internal thread is arranged inside the adjusting rod; the adjusting screw is screwed with the second internal thread; the adjusting screw is connected with the second positioning plate.

The utility model discloses further set up to, the top cap is equipped with the exhaust hole.

The utility model has the advantages that: the utility model discloses a cavity, first sealing member, second sealing member and case are prevented overflowing in the setting for when the gas overflows or pressure is too big, first sealing member is sealed with the case, prevents that the gas from overflowing and causing the accident.

Drawings

The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.

Figure 1 is a cross-sectional view of a stop block of the present invention abutting a second seal;

FIG. 2 is a cross-sectional view of the present invention during normal air supply;

figure 3 is a cross-sectional view of the stop block of the present invention abutting the first seal;

FIG. 4 is a partial enlarged view of portion A of FIG. 1;

wherein: 1. a valve body; 11. an air cavity; 12. a gas inlet channel; 13. an air outlet channel; 2. an elastic member; 21. A deformation section; 22. a sealing part; 3. an anti-overflow cavity; 31. an air inlet; 32. an air outlet groove; 33. an air outlet; 4. a valve core; 41. a blocking block; 51. a first seal member; 52. a second seal member; 61. a sealing screw; 62. a seal nut; 7. a top cover; 71. a first positioning plate; 72. a second positioning plate; 73. a return spring; 74. a first internal thread; 8. an adjusting cap; 81. adjusting a rod; 82. a first external thread; 83. a second internal thread; 84. an exhaust hole; 9. and adjusting screws.

Detailed Description

The invention will be further described with reference to the following examples.

As can be seen from fig. 1 to 4, the safety shut-off valve of the present embodiment includes a valve body 1 and an elastic member 2; the valve body 1 and the elastic part 2 are hermetically connected to form an air cavity 11; an air inlet channel 12 and an air outlet channel 13 are arranged in the valve body 1; the air outlet channel 13 is communicated with the air cavity 11; an overflow-preventing cavity 3 is arranged in the valve body 1; the overflow-preventing cavity 3 is provided with an air inlet 31 communicated with the air inlet channel 12 and an air outlet communicated with the air cavity 11; a valve core 4 is movably arranged in the overflow-preventing cavity 3; one end of the valve core 4 is provided with a stop block 41; the other end of the valve core 4 penetrates through the anti-overflowing cavity 3 and then abuts against the elastic piece 2; a first sealing element 51 and a second sealing element 52 are arranged in the overflowing preventing cavity 3; the blocking block 41 is movably arranged between the first sealing element 51 and the second sealing element 52. In the safety shut-off valve of the present embodiment, the first sealing element 51 and the second sealing element 52 are respectively disposed at the top inside the flow-through preventing cavity 3 and at the bottom inside the flow-through preventing cavity 3; when the blocking piece 41 abuts against the first sealing element 51, the air outlet is sealed; when the stopper 41 abuts against the second seal 52, the air inlet 31 is sealed.

In the safety shut-off valve of this embodiment, the air outlet includes an air outlet groove 32 formed in the inner wall of the flow-preventing cavity 3 and an air outlet hole 33 communicated with the air outlet groove 32; the air outlet 33 is arranged at the opening of the flow-through preventing cavity 3; the air outlet groove 32 and the valve core 4 are arranged at intervals; the air inlet 31 is arranged at the bottom of the valve core 4.

Specifically, when the stopper 41 is separated from the first seal 51 and the second seal 52, respectively, the gas enters the flow-preventing chamber 3 from the gas inlet 31 at the bottom of the valve element 4, and then enters the gas chamber 11 from the gap between the gas outlet groove 32 and the valve element 4 via the gas outlet hole 33.

In the safety shut-off valve of the present embodiment, the elastic member 2 is provided with a sealing screw 61 and a sealing nut 62; one end of the sealing screw 61 is abutted against the other end of the valve core 4; the other end of the sealing screw 61 passes through the elastic member 2 and then is connected with the sealing nut 62. Specifically, the valve core 4 is convenient to abut against the elastic part 2 through the arrangement, so that the elastic part 2 is deformed.

In the safety cut-off valve of this embodiment, the elastic member 2 includes a deformation portion 21 and a sealing portion 22 disposed around the deformation portion 21; the sealing part 22 is connected with the valve body 1 in a sealing way; the seal screw 61 and the seal nut 62 are provided in the deformation portion 21. In the safety shut-off valve of the embodiment, the safety shut-off valve further comprises a top cover 7 connected with the valve body 1; the elastic piece 2 is arranged between the valve body 1 and the top cover 7; the sealing part 22 is arranged at the joint of the valve body 1 and the top cover 7; a resetting component for resetting the elastic part 2 is arranged in the top cover 7. In the safety shut-off valve of this embodiment, the reset assembly includes a first positioning plate 71 disposed at the top of the deformation portion 21, a second positioning plate 72 disposed at the top of the top cover 7, and a reset spring 73 disposed between the first positioning plate 71 and the second positioning plate 72.

Specifically, when there is no gas, the valve core 4 is located at the bottom of the flow-preventing chamber 3 due to the action of the return spring 73, and the blocking block 41 abuts against the second sealing element 52 to seal the gas inlet 31; when gas enters from the gas inlet channel 12, the gas pushes the blocking block 41 and the valve core 4 upwards, the valve core 4 simultaneously pushes the deformation part 21 upwards to deform the deformation part 21, the whole elastic part 2 arches from the middle part and compresses the return spring 73, and at the moment, the blocking block 41 is separated from the second sealing element 52, so that the gas can enter the anti-overflow cavity 3 from the gas inlet 31 and enter the gas cavity 11 from the gas outlet of the anti-overflow cavity 3, and the gas flows out of the valve body 1 from the gas outlet channel 13; when the flow of gas is too big to exceed the threshold value, the gas continues upwards to promote stopper 41 and case 4, further make reset spring 73 compress, thereby make stopper 41 support with the first sealing member 51 of preventing overflowing the interior top of chamber 3 and lean on, make the gas outlet sealed, the gas can't get into in the air cavity 11 this moment, thereby prevent to play the effect of cutting off the gas, prevent that the gas from overflowing and causing the damage, it is normal when the gas resumes to go back, when the pressure of income gas channel 12 resumes normally promptly, reset spring 73 resets, thereby make stopper 41 and first sealing member 51 separate.

According to the safety shut-off valve, the safety shut-off valve further comprises an adjusting cap 8 and an adjusting screw 9; the top of the top cover 7 is provided with a first internal thread 74; the adjusting cap 8 is provided with an adjusting rod 81; the periphery of the adjusting rod 81 is provided with a first external thread 82 matched with the first internal thread 74; a second internal thread 83 is arranged inside the adjusting rod 81; the adjusting screw 9 is screwed with the second internal thread 83; the adjusting screw 9 is connected with the second positioning plate 72. Specifically, the tightness of the return spring 73 can be adjusted by the above arrangement, so that the threshold value of the pressure of the gas in the flow-preventing chamber 3 can be adjusted.

In the safety cut-off valve of the present embodiment, the top cover 7 is provided with an exhaust hole 84. The above arrangement facilitates the venting of the lid 7.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A safety shut-off valve which is characterized in that: comprises a valve body (1) and an elastic piece (2); the valve body (1) is hermetically connected with the elastic part (2) to form an air cavity (11); an air inlet channel (12) and an air outlet channel (13) are arranged in the valve body (1); the air outlet channel (13) is communicated with the air cavity (11); an anti-overflowing cavity (3) is arranged in the valve body (1); the anti-overflowing cavity (3) is provided with an air inlet (31) communicated with the air inlet channel (12) and an air outlet communicated with the air cavity (11); a valve core (4) is movably arranged in the anti-overflowing cavity (3); one end of the valve core (4) is provided with a stop block (41); the other end of the valve core (4) penetrates through the anti-overflowing cavity (3) and then abuts against the elastic piece (2); a first sealing piece (51) and a second sealing piece (52) are arranged in the anti-overflowing cavity (3); the stop block (41) is movably arranged between the first sealing element (51) and the second sealing element (52).

2. A safety shut-off valve according to claim 1, characterised in that: the first sealing element (51) and the second sealing element (52) are respectively arranged at the top part in the anti-overflowing cavity (3) and the bottom part in the anti-overflowing cavity (3); when the blocking block (41) abuts against the first sealing element (51), the air outlet is sealed; when the blocking block (41) abuts against the second sealing member (52), the air inlet (31) is sealed.

3. A safety shut-off valve according to claim 1, characterised in that: the air outlet comprises an air outlet groove (32) arranged on the inner wall of the anti-overflowing cavity (3) and an air outlet hole (33) communicated with the air outlet groove (32); the air outlet (33) is arranged at the opening of the anti-overflowing cavity (3); the air outlet groove (32) and the valve core (4) are arranged at intervals;

the air inlet (31) is arranged at the bottom of the valve core (4).

4. A safety shut-off valve according to claim 1, characterised in that: the elastic piece (2) is provided with a sealing screw (61) and a sealing nut (62); one end of the sealing screw (61) is abutted against the other end of the valve core (4); the other end of the sealing screw (61) penetrates through the elastic piece (2) and then is connected with the sealing nut (62).

5. A safety shut-off valve according to claim 4 wherein: the elastic piece (2) comprises a deformation part (21) and sealing parts (22) arranged on the periphery of the deformation part (21); the sealing part (22) is connected with the valve body (1) in a sealing way; the seal screw (61) and the seal nut (62) are arranged on the deformation part (21).

6. A safety shut-off valve according to claim 5 wherein: the safety shut-off valve also comprises a top cover (7) connected with the valve body (1); the elastic piece (2) is arranged between the valve body (1) and the top cover (7); the sealing part (22) is arranged at the joint of the valve body (1) and the top cover (7); a resetting component used for resetting the elastic piece (2) is arranged in the top cover (7).

7. A safety shut-off valve according to claim 6 wherein: the reset assembly comprises a first positioning plate (71) arranged at the top of the deformation part (21), a second positioning plate (72) arranged at the inner top of the top cover (7) and a reset spring (73) arranged between the first positioning plate (71) and the second positioning plate (72).

8. A safety shut-off valve according to claim 7 wherein: the safety shut-off valve also comprises an adjusting cap (8) and an adjusting screw (9); the top of the top cover (7) is provided with a first internal thread (74); the adjusting cap (8) is provided with an adjusting rod (81); a first external thread (82) matched with the first internal thread (74) is arranged on the periphery of the adjusting rod (81); a second internal thread (83) is arranged inside the adjusting rod (81); the adjusting screw (9) is screwed with the second internal thread (83); the adjusting screw (9) is connected with the second positioning plate (72).

9. A safety shut-off valve according to claim 6 wherein: the top cover (7) is provided with an exhaust hole (84).