Vertical normally-open electromagnetic gas emergency cut-off valve

Abstract

The utility model provides a vertical normally-open electromagnetic type gas emergency cut-off valve which comprises a valve body and a valve cover arranged on the valve body, a gas inlet chamber, a gas outlet chamber and a core mounting hole are arranged in the valve body, a valve core is arranged on the core mounting hole and comprises an outer core sleeve and a bottom core cover, a core inner chamber is arranged inside the outer core sleeve, a gas outlet hole is formed in the top surface of the outer core sleeve, and a gas outlet hole is formed in the bottom surface of the bottom core cover. A guide cover sliding hole is formed in the bottom face of the bottom core cover, a movable plate is arranged in the core inner chamber in a sliding mode, a supporting tension spring is arranged between the movable plate and the bottom core cover, a valve closing plug block is arranged on the top face of the movable plate, a movable shaft is arranged above the valve closing plug block, and a gas isolation cover in sliding fit with the guide cover sliding hole is arranged on the bottom face of the movable plate. A gas inlet hole is formed in the bottom face of the gas isolation cover, and a vent hole communicated with the gas inlet hole is formed in the side wall of the valve closing plug block. According to the vertical normally-open electromagnetic gas emergency cut-off valve, the supporting tension spring is isolated from gas, contact between the supporting tension spring and the gas is greatly reduced, and the service life of the gas is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of a gas emergency cut-off valve, in particular to a vertical normally open electromagnetic gas emergency cut-off valve. Background Art

[0002] Gas valves are generally used on natural gas pipelines to control the on and off of natural gas pipelines. In daily life, gas alarms are generally installed on natural gas pipelines. When a gas leak occurs in the pipeline, the gas alarm can generate an alarm signal to notify people to close the gas valve or stay away from the leakage area. However, when no one is around, if the gas valve is not closed for a long time, the concentration of the leaked gas may reach the explosion limit, causing a gas explosion accident. In addition, when the user does not hear the alarm signal, the leaked gas may cause gas poisoning to the user, endangering human health.

[0003] Cut-off valves are widely used in industrial manufacturing industries such as chemical and petroleum, especially in pipelines that require the transportation of special gases such as oil and natural gas. The gas emergency cut-off valve is a safety device used in gas transmission pipelines. It is mainly installed at the outlet of the gas storage tank pipeline. It can be quickly cut off in an emergency. In the event of equipment failure, corrosion damage, seal failure, leakage, or emergency, emergency cut-off can be used to avoid accidents and other safety issues.

[0004] The existing Chinese patent with authorization announcement number CN102878343B discloses a normally open gas emergency shut-off valve, including a valve body, a valve cover, a valve disc installed in the valve cover, and a valve stem. The valve stem is composed of an upper valve stem and a lower valve stem threaded together. The lower half of the lower valve stem is a light rod with a T-shaped head. There is a cylindrical center hole in the upper half, and symmetrical steel ball holes on the side walls. The steel ball holes are equipped with stainless steel balls for positioning. A collision block is installed in the center hole. Steel ball grooves corresponding to the steel ball holes are provided on both sides of the collision block. The T-head of the valve stem is installed in the thread plug of the valve disc, the main spring is installed around the lower valve stem between the valve disc and the valve cover, the top of the upper valve stem is threadedly connected to the handle, the center tube is equipped with a moving iron core, the outside of the valve stem is equipped with a non-magnetic tube threadedly connected to the valve cover, and the top of the non-magnetic tube is equipped with a fixing nut for installing the electromagnetic head. The upper half of the impact block is a guide column that can be installed in the center hole of the upper valve stem, with steel ball grooves symmetrically provided on both sides, and the lower half is provided with a cylindrical hole for installing the iron core spring, and the iron core spring is located between the impact block and the bottom of the cylindrical center hole of the lower valve stem.

[0005] The above-mentioned prior art solution has the following defects: when the gas flows through the normally open gas emergency shut-off valve, the main spring is in contact with the gas for a long time, and the gas will corrode the main spring, thereby reducing the service life of the main spring. Utility Model Content

[0006] The problem to be solved by the utility model is to provide a vertical normally open electromagnetic gas emergency shut-off valve in view of the above-mentioned deficiencies existing in the prior art, which solves the problem of low service life of the main spring existing in the prior art.

[0007] The above utility model object of the utility model is achieved through the following technical scheme: a vertical normally open electromagnetic gas emergency shut-off valve, comprising a valve body, a valve cover arranged on the valve body, the valve body having a gas inlet chamber, a gas outlet chamber and a core hole connecting the gas inlet chamber and the gas outlet chamber, the core hole being provided with a valve core, the valve core comprising an outer core sleeve inserted into the core hole and having a core inner chamber inside, a bottom core cover arranged at the bottom of the outer core sleeve, an air outlet hole being opened on the top surface of the outer core sleeve, the bottom core A guide cover sliding hole is provided on the bottom surface of the cover, a movable plate is slidably provided in the inner chamber of the core, a supporting tension spring is provided between the movable plate and the bottom core cover, a valve closing block plugged with the air outlet is provided on the top surface of the movable plate, a movable shaft penetrating the valve cover is provided above the valve closing block, a gas shield slidably matched with the guide cover sliding hole is provided on the bottom surface of the movable plate, an air inlet hole is provided on the bottom surface of the gas shield, and an air vent connected with the air inlet hole is provided on the side wall of the valve closing block.

[0008] The utility model is further configured as follows: a support column is arranged on the end surface of the bottom core cover facing the outer core sleeve, the top surface of the support column abuts against the bottom surface of the movable plate, and the support tension spring is sleeved on the support column.

[0009] The utility model is further configured as follows: a shaft coupling boss is arranged on the top surface of the valve closing block, and a shaft coupling threaded hole which is threadedly connected to the bottom of the movable shaft is opened on the top surface of the shaft coupling boss.

[0010] The utility model is further configured as follows: a core loading groove located directly above the core loading hole is opened on the bottom surface of the gas outlet chamber, a core loading plate embedded in the core loading groove is arranged on the outer side wall of the outer core sleeve, and the core loading plate is screwed to the bottom wall of the core loading groove.

[0011] The utility model is further configured as follows: a positioning hole is provided on the top surface of the valve body, and a positioning plug block plugged with the positioning hole is provided on the bottom surface of the valve cover.

[0012] The utility model is further configured as follows: a plurality of lower threaded holes are provided on the top surface of the valve body, a valve sealing ring is sleeved on the positioning plug, the valve sealing ring is located between the bottom surface of the valve cover and the top surface of the valve body, a plurality of middle through holes aligned with the lower threaded holes are provided on the valve sealing ring, a plurality of upper through holes aligned with the middle through holes are provided on the valve cover, and locking cover screws are provided in the upper through holes and are threadedly connected to the lower threaded holes after penetrating the middle through holes.

[0013] The utility model is further configured as follows: a shaft sealing groove and a bottom shaft hole are sequentially opened downwardly on the top surface of the valve cover; a plurality of shaft sealing rings are embedded in the shaft sealing groove; the shaft sealing rings are sleeved on a movable shaft; and the movable shaft passes through the bottom shaft hole.

[0014] The utility model is further configured as follows: an electromagnetic cylinder is arranged above the valve cover, the electromagnetic cylinder has a piston rod, and the piston rod of the electromagnetic cylinder is connected to the top of the movable shaft.

[0015] The utility model is further configured as follows: a cylinder frame is arranged between the valve cover and the electromagnetic cylinder, the cylinder frame includes a pressure plate arranged on the top surface of the valve cover, a connecting rod arranged on the top surface of the pressure plate, and a cylinder mounting plate arranged on the top of the connecting rod; the electromagnetic cylinder is arranged on the top surface of the cylinder mounting plate, the piston rod of the electromagnetic cylinder passes through the cylinder mounting plate, a top-penetrating shaft hole is opened on the pressure plate, and the movable shaft passes through the top-penetrating shaft hole.

[0016] In summary, the beneficial technical effects of the utility model are as follows: the vertical normally open electromagnetic gas emergency shut-off valve isolates the support tension spring from the gas, greatly reducing the contact between the support tension spring and the gas, which is beneficial to increasing the service life of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a neutral normally open electromagnetic gas emergency shut-off valve of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of a neutral normally open electromagnetic gas emergency shut-off valve of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the valve core in the utility model.

[0020] In the above drawings: 1, valve body; 2, valve cover; 3, gas inlet chamber; 4, gas outlet chamber; 5, core installation hole; 6, core installation groove; 7, valve core; 8, outer core sleeve; 9, bottom core cover; 10, core installation plate; 11, core inner chamber; 12, air outlet hole; 13, guide cover sliding hole; 14, movable plate; 15, support column; 16, support tension spring; 17, valve closing block; 18, coupling boss; 19, coupling threaded hole; 20, gas shield; 21, air inlet hole; 22, vent hole; 23, plate seal Groove; 24, plate sealing ring; 25, cover sealing groove; 26, cover sealing ring; 27, positioning socket; 28, positioning plug; 29, lower threaded hole; 30, valve sealing ring; 31, middle through hole; 32, upper through hole; 33, locking cover screw; 34, shaft sealing groove; 35, bottom through hole; 36, shaft sealing ring; 37, cylinder frame; 371, pressure plate; 372, connecting rod; 373, cylinder plate; 38, top through hole; 39, electromagnetic cylinder; 391, piston rod; 40, movable shaft. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1 As shown, the utility model provides a vertical normally open electromagnetic gas emergency shut-off valve, comprising a valve body 1 and a valve cover 2 arranged on the valve body 1 .

[0023] The valve body 1 is provided with a gas inlet chamber 3, a gas outlet chamber 4 and a core loading hole 5 connecting the gas inlet chamber 3 and the gas outlet chamber 4. The core loading hole 5 is a circular hole. A core loading groove 6 is provided on the bottom wall of the gas outlet chamber 4. The core loading groove 6 is located directly above the core loading hole 5 and is connected to the core loading hole 5. The cross section of the core loading groove 6 is circular, and the diameter of the core loading groove 6 is larger than the aperture of the core loading hole 5.

[0024] A valve core 7 is inserted into the core loading hole 5 , and the valve core 7 comprises an outer core sleeve 8 and a bottom core cover 9 .

[0025] The outer core sleeve 8 is inserted into the core loading hole 5 , and a core loading plate 10 is fixedly connected to the top of the side wall of the outer core sleeve 8 . The core loading plate 10 is engaged with the core loading groove 6 , and the core loading plate 10 is screwed to the bottom wall of the core loading groove 6 .

[0026] The outer core sleeve 8 has a core inner chamber 11 inside, and the cross section of the core inner chamber 11 is circular. An air outlet hole 12 is provided at the center of the top surface of the outer core sleeve 8, and the air outlet hole 12 is a circular hole, and the air outlet hole 12 is used to connect the core inner chamber 11 and the gas outlet chamber 4. The bottom core cover 9 is screwed to the bottom surface of the outer core sleeve 8, and a guide cover sliding hole 13 is provided at the center of the bottom surface of the bottom core cover 9, and the guide cover sliding hole 13 is a circular hole.

[0027] A movable plate 14 is slidably arranged in the core inner chamber 11, and the movable plate 14 is in the shape of a circular plate. Four cylindrical support columns 15 are fixedly connected to the top surface of the bottom core cover 9, and the four support columns 15 are equidistantly distributed in a circle, and the top surface of the support column 15 abuts against the bottom surface of the movable plate 14. A support tension spring 16 is sleeved on each support column 15, and one end of the support tension spring 16 is fixed to the bottom surface of the movable plate 14, and the other end is fixed to the top surface of the bottom core cover 9, and the support tension spring 16 is used to support the movable plate 14 to be positioned in the middle and upper part of the core inner chamber 11.

[0028] A valve closing block 17 is fixedly connected to the end surface of the movable plate 14 facing the gas outlet 12, a connecting shaft boss 18 is coaxially connected to the top surface of the valve closing block 17, a connecting shaft threaded hole 19 is provided on the top surface of the connecting shaft boss 18, the cross section of the valve closing block 17 is circular, and the valve closing block 17 is plugged and matched with the gas outlet 12. When the valve closing block 17 is inserted into the gas outlet 12, the valve core 7 restricts the passage of gas, and at this time, the vertical normally open electromagnetic gas emergency shut-off valve is in a closed state; when the valve closing block 17 is pulled out of the gas outlet 12, the valve core 7 does not restrict the passage of gas, and at this time, the vertical normally open electromagnetic gas emergency shut-off valve is in an open state.

[0029] The movable plate 14 is fixedly connected with a gas shield 20 on the end surface facing the guide shield slide hole 13. The gas shield 20 passes through the guide shield slide hole 13, and the gas shield 20 and the guide shield slide hole 13 are slidably matched. At this time, the support tension spring 16 is limited to contact with the gas to a certain extent. An air inlet hole 21 is opened on the bottom surface of the gas shield 20. The cross section of the air inlet hole 21 is circular, and the upper end of the air inlet hole 21 extends into the valve closing block 17. Four vent holes 22 are opened on the outer wall of the valve closing block 17 at equal intervals. The cross section of the vent hole 22 is a fan ring, and the vent hole 22 is connected with the air inlet hole 21.

[0030] A plate sealing groove 23 is circumferentially formed on the side wall of the movable plate 14 , and a plate sealing ring 24 is embedded in the plate sealing groove 23 . The plate sealing ring 24 is provided to improve the sealing performance between the movable plate 14 and the wall of the core inner chamber 11 .

[0031] A cover sealing groove 25 is circumferentially provided on the hole wall of the guide cover sliding hole 13, and a cover sealing ring 26 is embedded in the cover sealing groove 25. The cover sealing ring 26 is provided to improve the sealing performance between the gas isolation cover 20 and the guide sliding hole.

[0032] The vertical normally open electromagnetic gas emergency shut-off valve isolates the support tension spring 16 from the gas, greatly reducing the contact between the support tension spring 16 and the gas, which is beneficial to increasing the service life of the gas.

[0033] The top surface of the valve body 1 is provided with a positioning hole 27, which is a circular hole and communicates with the gas outlet chamber 4. The bottom surface of the valve cover 2 is fixedly connected with a positioning plug 28, which is cylindrical and plugged into each other.

[0034] A plurality of lower threaded holes 29 are provided on the top surface of the valve body 1 at equal intervals, a valve sealing ring 30 is sleeved on the positioning plug 28, the valve sealing ring 30 is located between the bottom surface of the valve cover 2 and the top surface of the valve body 1, a plurality of middle through holes 31 are provided on the valve sealing ring 30 and are aligned with the lower threaded holes 29, a plurality of upper through holes 32 are provided on the bottom surface of the valve cover 2 at equal intervals and are aligned with the middle through holes 31, and a locking cover screw 33 is provided in the upper through hole 32 and is threadedly connected to the lower threaded hole 29 after penetrating through the middle through hole 31.

[0035] A shaft sealing groove 34 and a bottom shaft hole 35 are sequentially opened on the top surface of the valve cover 2 from top to bottom. The cross section of the shaft sealing groove 34 is circular. In this embodiment, five shaft sealing rings 36 stacked in sequence are embedded in the shaft sealing groove 34. The cross section of the bottom shaft hole 35 is circular, and the bottom of the bottom shaft hole 35 extends into the positioning block 28.

[0036] A cylinder frame 37 is arranged above the valve cover 2, and the cylinder frame 37 includes a pressure plate 371, a connecting rod 372, and a cylinder mounting plate 373. The pressure plate 371 is screwed to the top surface of the valve cover 2. A top through-axis hole 38 aligned with the bottom through-axis hole 35 is opened at the center of the top surface of the pressure plate 371. The connecting rod 372 is fixedly connected to the top surface of the pressure plate 371. There are four connecting rods 372, and the four connecting rods 372 are distributed in a rectangular shape. The cylinder mounting plate 373 is fixedly connected to the tops of the four connecting rods 372.

[0037] An electromagnetic cylinder 39 is arranged above the valve cover 2. The electromagnetic cylinder 39 is a driving component. The electromagnetic cylinder 39 is fixedly mounted on the top surface of the cylinder plate 373. The electromagnetic cylinder 39 has a piston rod 391. The piston rod 391 of the electromagnetic cylinder 39 passes through the cylinder plate 373 and is flange-connected with a movable shaft 40. The movable shaft 40 passes through the top shaft hole 38, the shaft sealing groove 34, and the bottom shaft hole 35 in sequence and then extends into the gas outlet chamber 4. The bottom of the movable shaft 40 is threadedly connected to the coupling threaded hole 19 of the coupling boss 18, and the shaft sealing ring 36 is sleeved on the movable shaft 40.

[0038] When the vertical normally open electromagnetic gas emergency shut-off valve is working, the gas can pass through the gas inlet chamber 3, the gas inlet hole 21, the vent hole 22, the core chamber 11, the gas outlet hole 12, and the gas outlet chamber 4 in sequence.

[0039] When the combustible gas leak detection instrument in the gas pipeline system detects a gas leak, the gas alarm generates an alarm signal, and the control system transmits the signal of closing the piston-type normally open electromagnetic gas emergency shut-off valve to the electromagnetic cylinder 39. The electromagnetic cylinder 39 drives the piston rod 391 upward, and the upward movement of the piston rod 391 will drive the valve closing block 17, the movable plate 14, and the gas shield 20 upward through the movable shaft 40 until the top surface of the movable plate 14 abuts against the top wall of the core chamber 11. At this time, the valve closing block 17 is completely inserted into the air outlet 12, and the valve closing block 17 will close the air outlet 12. At this time, the vertical normally open electromagnetic gas emergency shut-off valve is in a closed state, restricting the passage of gas.

[0040] The vertical normally open electromagnetic gas emergency shut-off valve is in a normally open state. When the gas pipeline system needs maintenance or repair or gas leakage or overflow occurs, the valve can be closed in time. In addition, the vertical normally open electromagnetic gas emergency shut-off valve can be opened and closed automatically, which is beneficial to reducing gas leakage.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A vertical normally open electromagnetic gas emergency shut-off valve, comprising a valve body (1) and a valve cover (2) disposed on the valve body (1), characterized in that: The valve body (1) has a gas inlet chamber (3), a gas outlet chamber (4) and a core loading hole (5) connecting the gas inlet chamber (3) and the gas outlet chamber (4); a valve core (7) is arranged on the core loading hole (5); the valve core (7) comprises an outer core sleeve (8) inserted into the core loading hole (5) and having a core inner chamber (11) therein, and a bottom core cover (9) arranged at the bottom of the outer core sleeve (8); a gas outlet hole (12) is provided on the top surface of the outer core sleeve (8); a guide cover sliding hole (13) is provided on the bottom surface of the bottom core cover (9); a movable plate (14) is slidably arranged in the core inner chamber (11); the movable plate (14) A supporting tension spring (16) is arranged between the movable plate (14) and the bottom core cover (9), a valve closing block (17) plugged into the air outlet (12) is arranged on the top surface of the movable plate (14), a movable shaft (40) penetrating the valve cover (2) is arranged above the valve closing block (17), a gas baffle (20) slidingly matched with the guide cover sliding hole (13) is arranged on the bottom surface of the movable plate (14), an air inlet (21) extending from the top to the inside of the valve closing block (17) is opened on the bottom surface of the gas baffle (20), and an air vent (22) connected to the air inlet (21) is arranged on the side wall of the valve closing block (17).

2. A vertical normally open electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: A support column (15) is arranged on the end surface of the bottom core cover (9) facing the outer core sleeve (8), the top surface of the support column (15) abuts against the bottom surface of the movable plate (14), and the support tension spring (16) is sleeved on the support column (15).

3. The vertical normally open electromagnetic gas emergency shut-off valve according to claim 1 is characterized in that: A shaft coupling boss (18) is arranged on the top surface of the valve closing block (17), and a shaft coupling threaded hole (19) threadedly connected to the bottom of the movable shaft (40) is provided on the top surface of the shaft coupling boss (18).

4. A vertical normally open electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: A core loading groove (6) located directly above the core loading hole (5) is provided on the bottom surface of the gas outlet chamber (4), and a core loading plate (10) engaged with the core loading groove (6) is provided on the outer wall of the outer core sleeve (8), and the core loading plate (10) is screwed to the bottom wall of the core loading groove (6).

5. The vertical normally open electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: A positioning plug hole (27) is provided on the top surface of the valve body (1), and a positioning plug block (28) plugged into the positioning plug hole (27) is provided on the bottom surface of the valve cover (2).

6. A vertical normally open electromagnetic gas emergency shut-off valve according to claim 5, characterized in that: A plurality of lower threaded holes (29) are formed on the top surface of the valve body (1); a valve sealing ring (30) is sleeved on the positioning plug (28); the valve sealing ring (30) is located between the bottom surface of the valve cover (2) and the top surface of the valve body (1); a plurality of middle through holes (31) aligned with the lower threaded holes (29) are formed on the valve sealing ring (30); a plurality of upper through holes (32) aligned with the middle through holes (31) are formed on the valve cover (2); a locking cover screw (33) is penetrated through the middle through hole (31) and is threadedly connected to the lower threaded hole (29) in the upper through hole (32).

7. The vertical normally open electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The top surface of the valve cover (2) is provided with a shaft sealing groove (34) and a bottom shaft through hole (35) in sequence downwardly, and a plurality of shaft sealing rings (36) are embedded in the shaft sealing groove (34). The shaft sealing rings (36) are sleeved on a movable shaft (40), and the movable shaft (40) passes through the bottom shaft through hole (35).

8. The vertical normally open electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: An electromagnetic cylinder (39) is arranged above the valve cover (2), and the electromagnetic cylinder (39) has a piston rod (391). The piston rod (391) of the electromagnetic cylinder (39) is connected to the top of the movable shaft (40).

9. A vertical normally open electromagnetic gas emergency shut-off valve according to claim 8, characterized in that: A cylinder frame (37) is arranged between the valve cover (2) and the electromagnetic cylinder (39), and the cylinder frame (37) includes a pressure plate (371) arranged on the top surface of the valve cover (2), a connecting rod (372) arranged on the top surface of the pressure plate (371), and a cylinder mounting plate (373) arranged on the top of the connecting rod (372). The electromagnetic cylinder (39) is arranged on the top surface of the cylinder mounting plate (373), and the piston rod (391) of the electromagnetic cylinder (39) passes through the cylinder mounting plate (373). A top-through shaft hole (38) is opened on the pressure plate (371), and the movable shaft (40) passes through the top-through shaft hole (38).

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