Anti-explosion safety type pneumatic diaphragm valve

Abstract

The utility model provides an explosion-proof safety type pneumatic diaphragm valve, which relates to the field of pneumatic diaphragm valves, and comprises a valve body and an alarm component, an air inlet pipe is arranged on the upper side of the valve body, a closed slope is arranged in the valve body, a diaphragm is arranged on the upper side of the closed slope, a piston block is arranged on the lower side of the air inlet pipe, and the outer side of the piston block is connected with a driving block. The upper side of the driving block is provided with a limiting block, one end of the diaphragm is connected with a rubber plug, the rubber plug is connected to the lower end of the driving block, the alarm assembly comprises a ball head located on the upper side of the diaphragm, the upper end of the ball head is connected with a first connecting rod, the upper end of the first connecting rod is connected with a guide block, and the upper end of the guide block is connected with a second connecting rod; a hinge rod is arranged on the upper side of the second connecting rod, a switch is arranged on the lower side of one end of the hinge rod, and meanwhile the switch is electrically connected with an audible and visual alarm installed on the outer side of the valve body. According to the utility model, the diaphragm is protected, and the alarm effect is triggered when the pressure is abnormal.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic diaphragm valve technical field, concretely relates to a kind of explosion-proof safety type pneumatic diaphragm valve. BACKGROUND

[0002] Pneumatic diaphragm valve is a special form of cut-off valve, its opening and closing member is a diaphragm made of soft material, the inner cavity of valve body and the inner cavity of bonnet and driving components are separated, so it is called pneumatic diaphragm valve.

[0003] After searching, prior art (announcement number: CN221443378U), the document records "a kind of pneumatic diaphragm valve with explosion-proof device, including valve base, the bottom of the inner cavity of valve base is fixed with closed slope, the top of valve base is fixed with diaphragm, the diaphragm is used to seal mechanism by deformation, the top of diaphragm is fixed with valve top seat, the top of valve top seat is fixed with air pressure pipe and pneumatic valve, the inner surface of valve top seat is fixed with pneumatic mechanism, the gas inlet end of valve base is fixed with air inlet pipe, the bottom of valve base is fixed with explosion-proof assembly, the gas outlet end of valve base is fixed with non-return assembly and air outlet pipe.The pneumatic diaphragm valve with explosion-proof device, diaphragm is fixed by valve base and valve top seat, and is driven by pneumatic mechanism under the drive of pneumatic valve to control the start and stop of pneumatic diaphragm valve, when internal pressure is too large, and exceeds threshold value, will be automatically pressure-relieved by explosion-proof assembly, internal high-pressure gas is discharged, and it restores original state when pressure is normal, explosion-proof is efficient, and it is safe to use."

[0004] Although the pneumatic diaphragm valve in prior art has achieved explosion-proof effect, there are still some deficiencies: the explosion-proof assembly involved in the existing pneumatic diaphragm valve, when internal pressure of pipeline becomes large, internal pressure not only generates pressure on explosion-proof assembly, but also generates reverse pressure on inner diaphragm, which can cause rupture of diaphragm, secondly, only pressure relief function is available when high pressure occurs, and maintenance personnel cannot be notified in time to check pipeline abnormal pressure. UTILITY MODEL CONTENTS

[0005] In order to overcome the defects in prior art, a kind of explosion-proof safety type pneumatic diaphragm valve is provided to solve the problems in the above background.

[0006] In order to achieve the above object, provide a kind of explosion-proof safety type pneumatic diaphragm valve, comprising: valve body and alarm component, the upper side of the valve body is equipped with inlet pipe, and the inside of valve body is equipped with closed slope, and the upper side of closed slope is equipped with diaphragm, the lower side of inlet pipe is equipped with piston block, and the outside of piston block is connected with driving block, and the upper side of driving block is equipped with limit block, one end of diaphragm is connected with rubber plug, and rubber plug is connected in the lower end of driving block, the alarm component includes ball head located in the upper side of diaphragm, and the upper end of ball head is connected with first connecting rod, and the upper end of first connecting rod is connected with guide block, the upper end of guide block is connected with second connecting rod, and the upper side of second connecting rod is equipped with articulated rod, and one end of articulated rod is equipped with switch on the lower side, and switch is electrically connected with audible and visual alarm installed on the outside of valve body.

[0007] Further, the piston block is slidably connected in the groove cavity opened in the inside of valve body, and the lower end of piston block is connected with connecting block, and the outside of connecting block is connected with first sliding block.

[0008] Further, the first sliding groove is opened in the inner cavity wall of valve body, and the first sliding block is slidably connected in the first sliding groove, and the first sliding block is connected with driving block.

[0009] Further, the second sliding groove is opened in the inner cavity wall of valve body, and the second sliding block is slidably connected in the second sliding groove, and the second sliding block is equipped with spring on the lower side, and the second sliding block is connected with rubber plug.

[0010] Further, the two sides of closed slope are equipped as inlet and outlet flow channel, and pressure relief valve is connected on the outside of flow channel.

[0011] Further, the first connecting rod slides through driving block, and ball head is located between driving block and diaphragm.

[0012] Further, the second connecting rod slides through valve body, and the upper end of second connecting rod is placed on the outside of valve body, and articulated rod is articulated with support block in the middle, support block is fixed on the upper side of valve body, and extrusion head is arranged on the end of articulated rod close to switch.

[0013] The beneficial effects of the utility model lie in:

[0014] 1, when using, when pipeline produces high pressure, when diaphragm valve opens, output end appears to be blocked, the high pressure in the inside at this time is reversed and acts on diaphragm, makes diaphragm produce convex deformation upwards, diaphragm is first blocked by driving block and limit block at this time, prevents diaphragm from further producing deformation and leading to rupture, simultaneously, pressure relief valve starts pressure relief, when diaphragm valve closes, rubber plug of one end of diaphragm is placed in the flow channel on the top of closed slope and seals it at this time, high pressure on the side of inlet liquid cannot produce pressure effect on diaphragm, thereby also realizes the protection of diaphragm, simultaneously, pressure relief valve plays the effect of explosion-proof pressure relief;

[0015] 2, the ball head and connecting rod structure included in the alarm assembly, so that in the diaphragm in the safe range of deformation, will contact the ball head upward, and then through two connecting rods upward moving the end of the articulated rod upward, and then under the fulcrum effect of the support block makes the other end of the articulated rod downward, so that through the extrusion head touch switch to start the sound and light alarm, and then can timely inform the relevant personnel to check the pipeline pressure abnormal. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The cross-sectional structure diagram of the diaphragm valve of the embodiment of the utility model.

[0017] Figure 2 The structure schematic diagram of the embodiment of the utility model Figure 1 A place structure schematic diagram.

[0018] Figure 3 The structure schematic diagram of the embodiment of the utility model Figure 1 B place structure schematic diagram.

[0019] Figure 4 The alarm assembly structure schematic diagram of the embodiment of the utility model.

[0020] Figure 5 The switch trigger alarm circuit schematic diagram of the embodiment of the utility model.

[0021] In the figure: 1, valve body;11, inlet pipe;111, piston block;1111, connecting block;112, first sliding block;113, drive block;114, limit block;115, first sliding groove;12, sound and light alarm;13, diaphragm;131, rubber plug;132, second sliding block;133, second sliding groove;134, spring;14, closed slope;15, pressure relief valve;2, alarm assembly;21, ball head;22, first connecting rod;23, guide block;24, second connecting rod;25, articulated rod;26, support block;27, extrusion head;28, switch. DETAILED DESCRIPTION

[0022] Refer to Figures 1 to 5The utility model provides an anti -explosion safety type pneumatic diaphragm valve, include: valve body 1 and alarm component 2, the upper side of valve body 1 is equipped with air inlet pipe 11, and the inside of valve body 1 is equipped with closed slope 14, and is equipped with diaphragm 13 on the upper side of closed slope 14, the lower side of air inlet pipe 11 is equipped with piston block 111, and the outside of piston block 111 is connected with drive block 113, and the upper side of drive block 113 is equipped with limit block 114, and one end of diaphragm 13 is connected with rubber plug 131, and rubber plug 131 is connected in drive block 113 lower end, alarm component 2 includes the ball head 21 in diaphragm 13 upper side, and the upper end of ball head 21 is connected with first connecting rod 22, and the upper end of first connecting rod 22 is connected with guide block 23, and the upper end of guide block 23 is connected with second connecting rod 24, and the upper side of second connecting rod 24 is equipped with articulated lever 25, and the lower side of one end of articulated lever 25 is equipped with switch 28, and switch 28 and sounder 12 of alarm of valve body 1 outside installation are electrically connected.

[0023] In the embodiment, the valve body 1 and the alarm component 2 constitute the main body structure of the anti-explosion safety type pneumatic diaphragm valve.

[0024] Specifically, two chambers are arranged on the upper side of the flow passage in the valve body 1, and the chambers are isolated from each other by the valve body 1 itself.

[0025] When closed, the pneumatic valve connected to the top of the air inlet pipe 11 is used to inflate the inside of the air inlet pipe 11, and then the piston block 111 is driven downward to drive the drive block 113 to move, thereby pushing the rubber plug 131 to block the space on the upper side of the closed slope 14. When opened, the air inlet pipe 11 releases the air pressure, and at this time, the rubber plug 131 is reset under the action of the spring 134 mentioned below.

[0026] It should be noted that the diaphragm 13 is made of flexible material, and the rubber plug 131 is part of the diaphragm 13 and is made of an integrated structure.

[0027] Specifically, the guide block 23 is slidingly connected in the guide groove formed in the inner cavity wall of the valve body 1.

[0028] As Figure 1 , Figure 2 and Figure 3In the middle, the piston block 111 is slidingly connected in the groove cavity opened in the valve body 1, and the lower end of the piston block 111 is connected with the connecting block 1111, and the outer side of the connecting block 1111 is connected with the first sliding block 112, the inner cavity wall of the valve body 1 is provided with a first sliding groove 115, and the first sliding block 112 is slidingly connected in the first sliding groove 115, and the first sliding block 112 is connected with the driving block 113, the inner cavity wall of the valve body 1 is provided with a second sliding groove 133, and the second sliding groove 133 is provided with a slidingly connected second sliding block 132 on the inner side, and the lower side of the second sliding block 132 is provided with a spring 134, and the second sliding block 132 is connected with the rubber plug 131, and the two sides of the sealing slope 14 are provided as inlet and outlet flow channels, and the outer side of the flow channel is connected with the pressure relief valve 15.

[0029] Specifically, the pressure relief valve 15 is provided with two, which are respectively installed on the lower side of the diaphragm valve inlet and outlet flow channel, and are in communication with the inside of the diaphragm valve inlet and outlet flow channel.

[0030] Specifically, the lower side of the rubber plug 131 is provided with a downward protruding part, and when the second sliding block 132 compresses the spring 134 to a certain extent, the rubber plug 131 realizes the complete closing of the valve body 1.

[0031] As a preferred embodiment, by setting the rubber plug 131, the second sliding block 132 and the second sliding groove 133, the movement directionality of the rubber plug 131 is realized, and the rubber plug 131 is harder in texture than general film material, thereby increasing the accuracy of flow regulation and preventing hysteresis during opening and closing.

[0032] As Figure 1 and Figure 4 In the middle, the first connecting rod 22 slides through the driving block 113, and the ball head 21 is located between the driving block 113 and the diaphragm 13, the second connecting rod 24 slides through the valve body 1, and the upper end of the second connecting rod 24 is located outside the valve body 1, and the middle of the hinged rod 25 is hinged with the supporting block 26, the supporting block 26 is fixed on the upper side of the valve body 1, and the extrusion head 27 is provided on one end of the hinged rod 25 close to the switch 28.

[0033] It should be noted that the switch 28 is provided as a press switch, that is, in the absence of external pressure, the extrusion head 27 cannot be triggered into a pass-through state in contact with the switch 28.

[0034] Specifically, the first connecting rod 22 passes through the driving block 113, and the driving block 113 moves up and down relative to the first connecting rod 22, that is, the ball head 21 at the lower end of the first connecting rod 22 is provided with a certain weight, so that the driving block 113 cannot drive the movement of the first connecting rod 22 when it moves.

[0035] When the pipeline generates high pressure, the output end is blocked when the diaphragm valve is opened, at this time the high pressure inside reversely acts on the diaphragm, makes the diaphragm produce convex deformation upward, at this time the diaphragm is first limited and blocked by the driving block and the limiting block, prevents the diaphragm from further deforming to cause rupture, meanwhile the pressure relief valve starts pressure relief, when the diaphragm valve is closed, at this time the rubber plug at one end of the diaphragm is placed in the flow channel at the top of the closed slope to block it, the high pressure on the liquid inlet side cannot act on the diaphragm, thereby also achieving the protection of the diaphragm, and the pressure relief valve plays the effect of explosion-proof pressure relief; the ball head and the connecting rod structure included in the alarm assembly make the diaphragm contact the ball head upward when the diaphragm deforms within a safe range, and then move upward through the two connecting rods to push one end of the articulated rod upward, and then make the other end of the articulated rod move downward under the fulcrum action of the supporting block, so that the switch is touched by the extrusion head to start the sound and light alarm, thereby the relevant personnel can be notified in time to check the pipeline pressure anomaly.

[0036] The explosion-proof safety type pneumatic diaphragm valve can effectively solve the problems in the background art, and has the effects of protecting the diaphragm and triggering the alarm when the pressure is abnormal on the basis of the existing explosion-proof safety type pneumatic diaphragm valve technology.

Claims

1. An explosion-proof safety diaphragm valve, comprising: The utility model relates to a valve body (1) and alarm assembly (2), the valve body (1) upside is equipped with inlet pipe (11), and the inside of valve body (1) is equipped with closed slope (14), and is equipped with diaphragm (13) on the upside of closed slope (14), it is characterized by: the lower side of inlet pipe (11) is equipped with piston block (111), and the outside of piston block (111) is connected with drive block (113), and the upside of drive block (113) is equipped with limit block (114), one end of diaphragm (13) is connected with rubber plug (131), and rubber plug (131) is connected in drive block (113) lower end, alarm assembly (2) includes the ball head (21) in diaphragm (13) upside, and the upper end of ball head (21) is connected with first connecting rod (22), and the upper end of first connecting rod (22) is connected with guide block (23), the upper end of guide block (23) is connected with second connecting rod (24), and the upper side of second connecting rod (24) is equipped with articulated lever (25), and one end lower side of articulated lever (25) is equipped with switch (28), simultaneously switch (28) and audible -visual alarm (12) installed outside valve body (1) electric connection.

2. The explosion-proof safety type pneumatic diaphragm valve according to claim 1, characterized in that, The piston block (111) is slidably connected in the groove cavity formed in the inside of the valve body (1), and the lower end of the piston block (111) is connected with the connecting block (1111), and the outer side of the connecting block (1111) is connected with the first sliding block (112).

3. The explosion-proof safety diaphragm valve according to claim 1, wherein The inner cavity wall of the valve body (1) is provided with a first sliding groove (115), and the first sliding block (112) is slidably connected in the first sliding groove (115), and the first sliding block (112) is connected with the drive block (113).

4. The explosion-proof safety diaphragm valve according to claim 1, wherein, The inner cavity wall of the valve body (1) is provided with a second sliding groove (133), and the second sliding groove (133) is provided with a second sliding block (132) slidably connected in the inner side of the second sliding groove (133), and the lower side of the second sliding block (132) is provided with a spring (134), and the second sliding block (132) is connected with the rubber plug (131).

5. The explosion-proof safety diaphragm valve according to claim 1, wherein, The two sides of the closed slope (14) are provided as inlet and outlet flow channels, and the pressure relief valve (15) is connected outside the flow channels.

6. The explosion-proof safety diaphragm valve according to claim 1, wherein The first connecting rod (22) slides through the drive block (113), and the ball head (21) is located between the drive block (113) and the diaphragm (13).

7. The explosion-proof safety diaphragm valve according to claim 1, wherein The second connecting rod (24) slides through the valve body (1), and the upper end of the second connecting rod (24) is arranged outside the valve body (1), and the articulated lever (25) is hingedly connected with the supporting block (26) in the middle part of the articulated lever (25), the supporting block (26) is fixed on the upper side of the valve body (1), and the extrusion head (27) is arranged on one end of the articulated lever (25) close to the switch (28).

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