CN210178669U

CN210178669U - Two-position five-way explosion-proof valve

Info

Publication number: CN210178669U
Application number: CN201920772621.XU
Authority: CN
Inventors: xinghuo Zeng; 曾星火
Original assignee: Ningbo Fenghua Nuoxin Pneumatic Engineering Co Ltd
Current assignee: Ningbo Fenghua Nuoxin Pneumatic Engineering Co Ltd
Priority date: 2019-05-27
Filing date: 2019-05-27
Publication date: 2020-03-24
Anticipated expiration: 2029-05-27

Abstract

The utility model discloses a two-position five-way explosion-proof valve, which comprises a valve body, a valve rod, a rear end cover and a valve seat, wherein a pilot head is arranged on the valve seat, a first exhaust port, a first gas outlet, a gas inlet, a second gas outlet and a second exhaust port are arranged in the valve body, a piston cavity, a gas guide hole and a ventilation cavity are arranged in the valve seat, a piston is movably arranged in the piston cavity, the piston cavity is divided into a first cavity and a second cavity by the piston, the first cavity is communicated with the gas guide hole, the second cavity is communicated with the valve cavity, and the pilot head is vertically arranged on the valve seat; the first exhaust port is arranged at one end, close to the piston cavity, of the valve body, the side wall of the valve rod is provided with a wear-resisting ring, a gap is reserved between the valve rod and the valve body through the wear-resisting ring, and the piston cavity is communicated with the first exhaust port through the gap. The utility model has the advantages of it is following and effect: the gas internal exhaust mode is adopted, the processing and manufacturing process is more convenient, and the dust influence is avoided; the user can select a suitable air inlet; the total length of the vertical guide head is smaller.

Description

Two-position five-way explosion-proof valve

Technical Field

The utility model relates to a valve class technical field, in particular to two-position five-way flame proof valve.

Background

The two-position five-way valve is widely applied to fluid control in various technical fields, and is well known, and is particularly common in a chemical workshop with much dust. The structure of a common explosion-proof valve on the market at present generally comprises a valve body, a valve rod movably arranged in a valve cavity of the valve body, a rear cover and a valve seat respectively arranged at two ends of the valve body, wherein a first exhaust port, a first air outlet, a first air inlet, a second air outlet and a second exhaust port which are respectively communicated with the valve cavity are sequentially and equidistantly arranged on the wall of the valve body from back to front, a plurality of flat rings are arranged on the valve rod, a plurality of nodes corresponding to the flat rings are arranged in the valve body, the nodes are arranged in a staggered manner with the first exhaust port, the first air outlet, the first air inlet, the second air outlet and the second exhaust port, a piston is arranged at the front end of the valve rod, an accommodating cavity for the piston to move, the second air inlet and a control air hole correspondingly matched with the piston are arranged on the valve seat, an air flow passage communicated with the accommodating cavity is arranged on the valve, the pilot assembly is transversely mounted on the valve seat. When the first guide assembly is electrified, a gas passage between the second gas inlet and the control gas hole is communicated, so that the piston pushes the valve rod to move backwards under the action of the driving gas source, and air in the accommodating cavity is discharged from the gas flow channel; when the pilot assembly is powered off, the gas passage between the second gas inlet and the control gas hole is cut off, and the valve rod returns to the original position forwards under the action of the rear cover spring, so that the switching of the working gas circuit is realized.

However, the two-position five-way electromagnetic valve has the following disadvantages: when the piston moves, the gas in the containing cavity needs to be discharged from the airflow channel, the airflow channel needs to be arranged when the valve seat is manufactured, the problem that the machining and manufacturing process is troublesome exists, and the airflow channel is easy to block due to the fact that more dust exists in a chemical workshop and long-time use is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a two-position five-way flame proof valve adopts the mode of arranging in the air of piston cavity to discharge the gas in the second chamber, has the effect that manufacturing process is more convenient, do not receive the dust influence, and the vertical leading head that sets up makes the overall length of flame proof valve shorter, and shared space is less.

The above technical purpose of the present invention can be achieved by the following technical solutions: a two-position five-way explosion-proof valve comprises a valve body, a valve rod movably arranged in a valve cavity of the valve body, a rear end cover and a valve seat, wherein the rear end cover and the valve seat are respectively arranged at two ends of the valve body; the first exhaust port is arranged at one end, close to the piston cavity, of the valve body, the valve rod is provided with a wear-resisting ring on the side wall between the piston cavity and the first exhaust port, the wear-resisting ring enables a gap to be reserved between the valve rod and the valve body, and the piston cavity is communicated with the first exhaust port through the gap.

By adopting the technical scheme, when the air inlet is in a working state, the air inlet is connected with the air source, one part of air in the air inlet is introduced into the ventilation cavity through the pilot air channel, the other part of air is directly introduced into the valve cavity, when the pilot head drives the ventilation cavity to be communicated with the air guide hole, the air in the ventilation cavity is introduced into the first cavity of the piston cavity through the air guide hole, the piston is pushed to move towards the valve cavity, the piston simultaneously pushes the valve rod to move, the air in the second cavity can be discharged from the first exhaust port through a gap between the valve rod and the valve cavity in the movement process of the piston, and compared with an internal exhaust mode in the prior art, the air inlet does not need to be provided with a pore channel, is more convenient in the processing and manufacturing process and is not influenced. In addition, compared with the traditional guide head transversely installed on the valve seat, the guide head has the effects of smaller transverse length and smaller occupied space.

The utility model discloses a further set up to: a pilot air passage is arranged in the valve body, and two ends of the pilot air passage are respectively communicated with the ventilation cavity and the air inlet; the rear end cover is provided with a mounting groove communicated with the valve cavity, the valve body is internally provided with a reset air passage, and two ends of the reset air passage are respectively communicated with the air inlet and the mounting groove.

Through adopting above-mentioned technical scheme, when the valve rod resets, partly gaseous can lead to in the mounting groove and promote the valve rod to the motion realization of piston chamber through the air flue that resets in the inlet port resets.

The utility model discloses a further set up to: and a reset spring is arranged in the mounting groove, and the reset spring enables the valve rod to always have the trend of moving towards the piston cavity.

Through adopting above-mentioned technical scheme, order about the gas guide hole as the pilot head and close the back, let in the gas to the mounting groove from the air flue that resets and can make the valve rod reset fast under reset spring's mating reaction, reset spring has supplementary effect.

The utility model discloses a further set up to: the valve rod is provided with a plurality of flat rings, a plurality of nodes corresponding to the flat rings are arranged in the valve body, the nodes are arranged with the first exhaust port, the first air outlet, the air inlet, the second air outlet and the second exhaust port in a staggered mode, the side walls of the flat rings are provided with sealing rings, and the sealing rings are in sealing fit with the valve cavity.

Through adopting above-mentioned technical scheme, under the sealed effect of sealing washer, make the sealed effect of separating between first gas vent, first gas outlet, air inlet, second gas outlet and the second gas vent better, be difficult for appearing gas leakage phenomenon.

The utility model discloses a further set up to: the air inlet is including the first air inlet and the second air inlet that are linked together, and two different sides are seted up respectively on the valve body to first air inlet and second air inlet.

By adopting the technical scheme, the air inlets at different positions can be selected to be communicated with the air source according to the actual use condition of a user.

The utility model discloses a further set up to: the first air outlet and the second air outlet are arranged on the bottom surface of the valve body, and the first exhaust port and the second exhaust port are arranged on the side surface of the valve body.

The utility model discloses a further set up to: the leading head is including the casing, and casing and disk seat junction are provided with sealed the pad, and sliding connection has movable iron core, fixedly connected with and moves iron core matched with quiet iron core and overlaps the coil pack outside quiet iron core in the casing, moves the iron core lower extreme and stretches into the intracavity of ventilating and just counterbalance the cooperation with the air guide hole.

By adopting the technical scheme, because the dust in the air of a chemical workshop is more, the coil assembly in the guide head needs to be protected in a fully-sealed mode, otherwise, electric sparks are generated to easily cause explosion, and a sealing gasket is arranged between the shell and the valve seat to achieve a better sealing effect.

The utility model discloses a further set up to: the valve seat is provided with an adjusting hole, the adjusting hole is communicated with the ventilation cavity, a manual rod used for driving the movable iron core to move is rotatably connected in the adjusting hole, and the front end of the manual rod is provided with a convex part which is matched with the movable iron core in an abutting mode.

By adopting the technical scheme, the manual lever can be rotated to manually control the on-off of the air guide hole, when the manual lever rotates, the convex part rotates along with the manual lever, and the convex part can push the movable iron core to move away from the air guide hole, so that the gas in the air vent cavity is introduced into the air guide hole.

The utility model discloses a further set up to: the end part of the hand lever, which is far away from the convex part, is provided with a linear groove.

Through adopting above-mentioned technical scheme, when rotating manual pole, can insert the spanner in the recess, so can be convenient for rotate manual pole, labour saving relatively.

The utility model discloses a further set up to: the cross section of the convex part is arc-shaped, and the lower end part of the movable iron core is abutted against the outer wall of the convex part.

Through adopting above-mentioned technical scheme, when manual lever rotated and drives the curved convex part in cross-section and rotate, moved the iron core and moved in keeping away from the air guide hole under the guide effect of convex part arc outer wall, when manual lever rotatory 90 degrees, moved the iron core and the distance of air guide hole the biggest, can realize the angular positioning.

To sum up, the utility model discloses following beneficial effect has:

1. the gas in the second cavity is exhausted from the first exhaust port through the gap between the valve rod and the valve cavity by adopting an internal air exhaust mode in the piston cavity, and compared with an external exhaust mode in the prior art, the piston has the effects of more convenient processing and manufacturing process and no influence of dust;

2. the first air inlet and the second air inlet are respectively arranged on different side surfaces, the first exhaust port and the second exhaust port, and the first air outlet and the second air outlet are arranged on different side surfaces, so that a user can select a proper air inlet according to actual requirements, and the use is more flexible;

3. compared with a transverse pilot head, the vertical pilot head has smaller transverse length and occupies smaller space;

4. the manual rod can be used for manually controlling the movement of the movable iron core, and the convex part with the arc-shaped section also has the function of angle positioning.

Drawings

Fig. 1 is a schematic diagram of the overall internal structural relationship in a front view of the embodiment.

Fig. 2 is a schematic diagram of a top view of an embodiment.

Fig. 3 is a schematic diagram of the left side view of the embodiment.

In the figure: 1. a valve body; 11. a valve cavity; 12. a first air inlet; 13. a second air inlet; 14. a first exhaust port; 15. a first air outlet; 16. a second exhaust port; 17. a second air outlet; 18. a node; 2. a valve stem; 21. a flat ring; 211. a seal ring; 22. a wear ring; 23. a limiting hole; 3. a rear end cap; 31. mounting grooves; 32. a return spring; 4. a valve seat; 41. a piston cavity; 411. a first chamber; 412. a second chamber; 42. an air vent; 43. a vent lumen; 44. a piston; 45. an adjustment hole; 5. a leading head; 51. a housing; 52. a gasket; 53. a movable iron core; 54. a stationary iron core; 55. a coil assembly; 6. a pilot airway; 7. resetting the airway; 8. a manual lever; 81. a convex portion; 82. a groove; 9. a junction box.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model provides a two-position five-way flame proof valve, as shown in fig. 1 and fig. 2, including valve body 1, the both ends of valve body 1 are fixedly connected with disk seat 4 and rear end cap 3 respectively, are provided with vertical guide head 5 on the disk seat 4, compare in the guide head 5 of traditional mode horizontal installation on disk seat 4, have that horizontal length is littleer, occupation space is littleer effect. Leading head 5's lateral wall fixedly connected with terminal box 9, leading head 5 is including casing 51, sliding connection has movable iron core 53 in casing 51, fixedly connected with move iron core 53 matched with quiet iron core 54 and overlap the coil pack 55 outside quiet iron core 54, casing 51 is provided with sealed pad 52 with the junction of disk seat 4, because the dust in the chemical industry workshop air is more, need carry out the full sealed formula with the interior coil of leading head 5 and protect, otherwise produce the electric spark and easily arouse the explosion, it can play better sealed effect to set up sealed pad 52 between casing 51 and disk seat 4.

As shown in fig. 1 and 3, a vent cavity 43, a piston cavity 41 and an air vent 42 are formed in the valve seat 4, the vent cavity 43 is communicated with the piston cavity 41 through the air vent 42, and the lower end of a movable iron core 53 extends into the vent cavity 43 and is abutted against the air vent 42; the piston 44 is movably disposed in the piston chamber 41, the piston 44 divides the piston chamber 41 into a first chamber 411 and a second chamber 412, the first chamber 411 is communicated with the air vent 42, and the second chamber 412 is communicated with the valve chamber 11 of the valve body 1. The side wall of the valve seat 4 is provided with an adjusting hole 45, the adjusting hole 45 is communicated with the ventilation cavity 43, a manual rod 8 for driving the movable iron core 53 to move is rotatably connected in the adjusting hole 45, one end of the manual rod 8, which is positioned in the ventilation cavity 43, is provided with a convex part 81 with an arc-shaped section, the lower end part of the movable iron core 53 is abutted and matched with the outer wall of the convex part 81, and one end of the manual rod 8, which is far away from the convex part 81, is provided with a groove 82 shaped like.

The manual lever 8 is rotated to manually control the on-off of the air guide hole 42, when the manual lever 8 rotates, a wrench can be inserted into the groove 82, when the manual lever 8 rotates to drive the convex part 81 with the arc-shaped cross section to rotate, the movable iron core 53 moves away from the air guide hole 42 under the guiding action of the arc-shaped outer wall of the convex part 81, when the manual lever 8 rotates by 90 degrees, the distance between the movable iron core 53 and the orifice of the air guide hole 42 is the largest, the angle is positioned, and therefore air in the air vent cavity 43 is led into the air guide hole 42.

As shown in fig. 1 and 3, a valve rod 2 capable of moving along an axial direction is arranged in a valve cavity 11, a first exhaust port 14 communicated with the valve cavity 11 is sequentially arranged in the valve body 1 along the axial direction of the valve body 1, a first gas outlet 15, a gas inlet, a second gas outlet 17 and a second exhaust port 16, the gas inlet comprises a first gas inlet 12 and a second gas inlet 13 which are communicated, the first gas inlet 12 and the second gas inlet 13 are respectively arranged on two different side surfaces of the valve body 1, the first gas inlet 12 and the second gas inlet 13 are vertically arranged, the first gas outlet 15 and the second gas outlet 17 are arranged on the bottom surface of the valve body 1, and the first exhaust port 14 and the second exhaust port 16 are arranged on the side surface of the valve body 1. The valve rod 2 is provided with a plurality of flat rings 21, the side walls of the flat rings 21 are provided with sealing rings 211, the sealing rings 211 are in sealing fit with the valve cavity 11, under the sealing effect of sealing washer 211, make first gas vent 14, first gas outlet 15, the air inlet, sealed separate the effect better between second gas outlet 17 and the second gas vent 16, the difficult gas leakage phenomenon that appears, be provided with a plurality of nodes 18 corresponding with flat ring 21 in the valve body 1, a plurality of nodes 18 and first gas vent 14, first gas outlet 15, the air inlet, second gas outlet 17 and the crisscross setting of second gas vent 16, first gas vent 14 sets up the one end that is close to piston chamber 41 in the valve body 1, the lateral wall that valve rod 2 is located between piston chamber 41 and the first gas vent 14 is provided with wear-resisting ring 22, wear-resisting ring 22 makes and leaves the clearance between valve rod 2 and the valve body 1, piston chamber 41 is linked together through the clearance with first gas vent 14.

As shown in fig. 1 and 2, a pilot air passage 6 is formed in the valve body 1, one end of the pilot air passage 6 is communicated with the second air inlet 13, and the other end is communicated with the vent cavity 43; the mounting groove 31 that communicates in valve pocket 11 is seted up to rear end cap 3, set up reset air flue 7 in the valve body 1, reset air flue 7's one end and first air inlet 12 are linked together, the other end is linked together with mounting groove 31, valve rod 2 is close to the tip of mounting groove 31 and has seted up spacing hole 23 along the 2 axial of valve rod, be provided with reset spring 32 between mounting groove 31 and the valve rod 2, reset spring 32's one end is supported in mounting groove 31 inner wall, reset spring 32's the other end stretches into in the spacing hole 23 and offsets with the diapire of spacing hole 23, reset spring 32 makes valve rod 2 have the trend to the motion of piston chamber 41 all the time.

The utility model discloses a basic operating principle does: in the working state, the air inlet is communicated with an air source, one part of air in the air inlet is introduced into the ventilation cavity 43 through the pilot air channel 6, the other part of air is directly introduced into the valve cavity 11, when the coil assembly 55 is energized to drive the movable iron core 53 to move towards the stationary iron core 54, the gas in the vent cavity 43 is introduced into the first chamber 411 of the piston cavity 41 through the gas guide hole 42 after the vent cavity 43 is communicated with the gas guide hole 42, and pushes the piston 44 to move towards the valve cavity 11, the piston 44 simultaneously pushes the valve rod 2 to move, at this time, the air inlet is communicated with the first air outlet 15, the second air outlet 17 is communicated with the second air outlet 16, in the process of moving the piston 44, the gas in the second chamber 412 can be exhausted from the first exhaust port 14 through the gap between the valve rod 2 and the valve cavity 11, and compared with the exhaust mode in the prior art, the exhaust mode adopting the inner exhaust mode does not need to be provided with a pore channel, so that the processing and manufacturing process is convenient and is not influenced by dust. When valve rod 2 resets, move iron core 53 and move to offsetting to air guide 42, some gas in the air inlet can lead to in mounting groove 31 and push valve rod 2 to the motion realization of piston chamber 41 through the air flue 7 that resets and reset, and the air inlet is linked together with second gas outlet 17 this moment, and first gas outlet 14 is linked together with first gas outlet 15, adds the air flue 7 that resets that communicates the air inlet, can make valve rod 2 reset fast, and reset spring 32 has auxiliary drive's effect.

When the air-conditioning device is used, the air inlets at different positions can be selected to be communicated with the air source according to the actual use condition of a user.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. A two-position five-way explosion-proof valve comprises a valve body (1), a valve rod (2) movably arranged in a valve cavity (11) of the valve body (1), a rear end cover (3) and a valve seat (4) which are respectively arranged at two ends of the valve body (1), wherein a pilot head (5) is arranged on the valve seat (4), a first exhaust port (14), a first air outlet (15), an air inlet, a second air outlet (17) and a second exhaust port (16) which are communicated with the valve cavity (11) are sequentially arranged in the valve body (1) along the axial direction of the valve body (1), a piston cavity (41) communicated with the valve cavity (11), an air guide hole (42) communicated with the piston cavity (41) and a ventilation cavity (43) communicated with the air guide hole (42) are arranged in the valve seat (4), a piston (44) is movably arranged in the piston cavity (41), and the piston (44) divides the piston cavity (41) into a first cavity (411) and a second cavity (412), the first chamber (411) is communicated with the air guide hole (42), the second chamber (412) is communicated with the valve cavity (11), and the characteristics are that:

the guide head (5) is vertically arranged on the valve seat (4), and the lower end of the guide head (5) extends into the ventilation cavity (43); first exhaust port (14) set up in valve body (1) are close to the one end of piston chamber (41), valve rod (2) are located piston chamber (41) with lateral wall between first exhaust port (14) is provided with wear-resisting ring (22), wear-resisting ring (22) make valve rod (2) with leave the clearance between valve body (1), piston chamber (41) with first exhaust port (14) pass through the clearance is linked together.

2. The two-position five-way explosion-proof valve according to claim 1, characterized in that: a pilot air passage (6) is formed in the valve body (1), and two ends of the pilot air passage (6) are respectively communicated with the ventilation cavity (43) and the air inlet; the rear end cover (3) is provided with a mounting groove (31) communicated with the valve cavity (11), the valve body (1) is internally provided with a reset air passage (7), and two ends of the reset air passage (7) are respectively communicated with the air inlet and the mounting groove (31).

3. The two-position five-way explosion-proof valve according to claim 2, characterized in that: a return spring (32) is arranged in the mounting groove (31), and the return spring (32) enables the valve rod (2) to always have the trend of moving towards the piston cavity (41).

4. The two-position five-way explosion-proof valve according to claim 1, characterized in that: be provided with a plurality of flat rings (21) on valve rod (2), be provided with in valve body (1) a plurality of with corresponding node (18) of flat ring (21), a plurality of node (18) with first gas vent (14) first gas outlet (15) the air inlet second gas outlet (17) and second gas vent (16) crisscross the setting, a plurality of flat ring (21) lateral wall all is provided with sealing washer (211), sealing washer (211) with valve chamber (11) seal fit.

5. The two-position five-way explosion-proof valve according to claim 1, characterized in that: the air inlet comprises a first air inlet (12) and a second air inlet (13) which are communicated, and the first air inlet (12) and the second air inlet (13) are respectively arranged on two different side surfaces of the valve body (1).

6. The two-position five-way explosion-proof valve according to claim 1, characterized in that: the first air outlet (15) and the second air outlet (17) are arranged on the bottom surface of the valve body (1), and the first exhaust port (14) and the second exhaust port (16) are arranged on the side surface of the valve body (1).

7. The two-position five-way explosion-proof valve according to claim 1, characterized in that: leading head (5) including casing (51), casing (51) with disk seat (4) junction is provided with sealed pad (52), sliding connection has movable iron core (53), fixedly connected with and move iron core (53) matched with quiet iron core (54) and overlap in coil pack (55) outside quiet iron core (54) in casing (51), move iron core (53) lower extreme and stretch into in breather chamber (43) and with air guide hole (42) counterbalance cooperation.

8. The two-position five-way explosion-proof valve according to claim 7, characterized in that: the valve seat (4) is provided with an adjusting hole (45), the adjusting hole (45) is communicated with the ventilation cavity (43), a manual rod (8) used for driving the movable iron core (53) to move is connected in the adjusting hole (45) in a rotating mode, the front end of the manual rod (8) is provided with a convex portion (81), and the convex portion (81) is matched with the movable iron core (53) in an abutting mode.

9. The two-position five-way explosion-proof valve according to claim 8, characterized in that: the end part of the manual lever (8) far away from the convex part (81) is provided with a linear groove (82).

10. The two-position five-way explosion-proof valve according to claim 8, characterized in that: the cross section of the convex part (81) is arc-shaped, and the lower end part of the movable iron core (53) is abutted against the outer wall of the convex part (81).