CN211858513U

CN211858513U - Wind pressure switch

Info

Publication number: CN211858513U
Application number: CN202020347088.5U
Authority: CN
Inventors: 马松峰
Original assignee: Zhongshan Xiongyi Precision Electromechanical Co ltd
Current assignee: Zhongshan Xiongyi Precision Electromechanical Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-11-03
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a wind pressure switch, include: the upper shell is provided with a positive pressure detection port; the lower shell is provided with a negative pressure detection port; the microswitch is detachably arranged on the upper shell in a clamping manner, and an avoidance through hole is formed in the upper shell corresponding to a moving contact of the microswitch; the diaphragm assembly is arranged between the upper shell and the lower shell, the diaphragm assembly and the upper shell enclose a positive pressure cavity, the diaphragm assembly and the lower shell enclose a negative pressure cavity, and one side of the diaphragm assembly, facing the upper shell, is provided with a push rod corresponding to a moving contact of the micro switch; the spring is arranged between the diaphragm assembly and the lower shell; and the adjusting bolt is arranged on the lower shell and penetrates through the adjusting screw hole and is abutted to the spring. The micro switch is detachably mounted on the upper shell in a clamping mode, so that the micro switch is convenient to mount, is favorable for improving the efficiency during production and assembly, is convenient to maintain and is favorable for improving the maintenance efficiency.

Description

Wind pressure switch

Technical Field

The utility model relates to the technical field of switches, in particular to wind pressure switch.

Background

The wind pressure switch is a detecting element, is generally used on machinery requiring wind pressure, such as pneumatic press, pneumatic plate shearing machine, gas water heater, gas boiler, gas furnace, wall-hanging furnace and other electrical products using gas, and utilizes the static pressure of gas to push the microswitch to realize the on-off of current. The important function of the wind pressure switch is to ensure that the gas channel can be closed in time under the condition of unsmooth air exhaust of the equipment so as to ensure that the gas does not leak, thereby protecting the personal safety.

The microswitch of traditional wind pressure switch is generally installed fixedly through riveting or spiro union mode, and the installation and the dismantlement of being not convenient for have reduced the efficiency when producing the equipment, lead to the output in a workday limited, add man-hour when needs mass production, the cycle of production and processing is longer, can't satisfy the production demand, has brought the inconvenience for the maintenance moreover, has reduced the efficiency of maintenance.

Traditional wind pressure switch has two detection mouths, and malleation detection mouth and negative pressure detection mouth promptly, and wind pressure switch usually is with negative pressure detection mouth intercommunication in the negative pressure zone of exhaust fan spiral case sample, but in actual installation, can appear with malleation detection mouth intercommunication in the negative pressure zone's of exhaust fan spiral case the condition, leads to the unable normal work of wind pressure switch.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a wind pressure switch convenient to installation, dismantlement micro-gap switch.

According to the utility model discloses a wind pressure switch of first aspect embodiment, include:

the upper shell is provided with a positive pressure detection port;

the lower shell is provided with a negative pressure detection port;

the microswitch is detachably arranged on the upper shell in a clamping manner, and an avoidance through hole is formed in the upper shell corresponding to a moving contact of the microswitch;

the diaphragm assembly is arranged between the upper shell and the lower shell, the diaphragm assembly and the upper shell enclose a positive pressure cavity, the diaphragm assembly and the lower shell enclose a negative pressure cavity, and one side of the diaphragm assembly, facing the upper shell, is provided with a push rod corresponding to a moving contact of the micro switch;

a spring disposed between the diaphragm assembly and the lower housing;

and the adjusting bolt is arranged on the lower shell in a penetrating manner and is abutted to the spring.

According to the utility model discloses wind pressure switch has following beneficial effect at least: communicating a negative pressure detection port on the lower shell with a negative pressure area of a volute of an exhaust fan, and communicating a positive pressure detection port on the upper shell with the outside; before the micro-switch is used, the adjusting bolt in the adjusting screw hole is adjusted to enable the spring to be stressed, the spring enables the diaphragm assembly to provide a pretightening force for the diaphragm assembly, and therefore the diaphragm assembly moves upwards and the push rod abuts against a moving contact of the micro-switch; in the use process, when the air exhaust condition is good, the air pressure in the negative pressure cavity is reduced, so that the air pressure in the positive pressure cavity is larger than the air pressure in the negative pressure cavity, at the moment, the diaphragm assembly overcomes the acting force of the spring to move downwards and enable the push rod to be separated from the moving contact of the microswitch, and when the air exhaust condition is bad, the diaphragm assembly moves upwards under the acting force of the spring and enables the push rod to abut against the moving contact of the microswitch, so that a gas channel is closed in time. The micro switch is detachably mounted on the upper shell in a clamping mode, is convenient to mount, and is beneficial to improving the efficiency of production and assembly, so that the production and processing period is shortened, the production requirement can be met when mass production and processing are needed, the maintenance is convenient, and the maintenance efficiency is improved.

According to some embodiments of the utility model, the top of going up the casing is equipped with the chimb up, the chimb with go up the casing and enclose into a draw-in groove, micro-gap switch set up in the draw-in groove, the top of chimb corresponds micro-gap switch's top is equipped with spacing fixture block, be equipped with the direction inclined plane on the spacing fixture block. The micro switch is clamped into the clamping groove through the guiding effect of the guiding inclined plane, and the limiting clamping block limits the micro switch clamped into the clamping groove, so that the micro switch is installed and fixed.

According to the utility model discloses a some embodiments, negative pressure detects the mouth for setting up on the casing down and with the vent pipe's that the negative pressure chamber is linked together mouth of pipe, the malleation detects the mouth for setting up the air vent on last casing. The condition that the positive pressure detection port is communicated with the negative pressure area of the volute of the exhaust fan when sampling is carried out through the negative pressure detection port is favorably avoided, so that the normal work of the wind pressure switch is ensured.

According to some embodiments of the utility model, the air vent set up in micro-gap switch's below, the top of going up the casing corresponds micro-gap switch is provided with bellied bearing portion, micro-gap switch's bottom butt in bearing portion go up and with go up and have the clearance between the casing. Hide the air vent in micro-gap switch's below can further avoid detecting the mouth through the negative pressure and communicate the malleation when sampling the condition in the negative pressure zone of exhaust fan spiral case with the malleation, simultaneously, micro-gap switch's bottom butt in on the bearing portion and with go up and have the clearance between the casing, form a intercommunication passageway, make the air vent can be linked together with the external world to guarantee that the wind pressure switch can normally work.

According to some embodiments of the utility model, still including setting up installing support on the last casing for the fixed wind pressure switch of installation.

According to some embodiments of the utility model, the diaphragm subassembly includes diaphragm support and annular diaphragm, the main part of diaphragm support is circular, the inward flange of annular diaphragm connect in the periphery of diaphragm support, the outward flange clamp of annular diaphragm is arranged in go up the casing with between the casing down, the push rod set up in on the diaphragm support. When the air exhaust condition is good, the annular diaphragm drives the diaphragm support to overcome the acting force of the spring to move downwards under the action of the pressure difference and enable the push rod to be separated from the moving contact of the microswitch, and when the air exhaust condition is bad, the diaphragm support moves upwards under the acting force of the spring and enables the push rod to abut against the moving contact of the microswitch, so that the gas channel is closed in time.

According to the utility model discloses a some embodiments, the interior edge department of annular diaphragm is equipped with first fixture block, the outward flange department of annular diaphragm is equipped with the second fixture block, the periphery of diaphragm support be equipped with the first mounting groove of first fixture block matched with, go up on the casing perhaps be equipped with on the casing down with second fixture block matched with second mounting groove. The first fixture block is clamped in the first mounting groove, and the second fixture block is clamped in the second mounting groove, so that the annular diaphragm is mounted and fixed.

According to some embodiments of the utility model, the diaphragm support orientation one side of casing is equipped with the spacing groove down, the spring is close to the one end of diaphragm support is arranged in the spacing inslot. Through the spacing groove is right the limiting displacement of spring to prevent the diaphragm support is in the in-process that reciprocates the drunkenness appears in the spring, be favorable to improving the stability of wind pressure switch in the course of the work.

According to the utility model discloses a some embodiments, adjusting bolt orientation the one end of spring is equipped with the recess, be equipped with spacing arch in the recess, the spring is close to the one end of casing is arranged in down in the recess and the cover is located on the spacing arch. Through spacing arch is right the limiting displacement of spring further prevents the diaphragm support is in the in-process that reciprocates the drunkenness appears in the spring, has further improved the stability of wind pressure switch in the course of the work.

According to some embodiments of the utility model, the bottom of casing down in the edge of adjusting the screw is equipped with annular chimb down, annular chimb upper shield is equipped with a closing cap. It is right when adjusting bolt plays the guard action, can prevent that dust, oil smoke etc. from getting into adjust the screw influence adjusting bolt's regulation can prevent in dust, oil smoke etc. get into the wind pressure switch.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded schematic view of an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of an embodiment of the invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

fig. 4 is a schematic structural view of an upper housing and a mounting bracket according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at II;

fig. 6 is a schematic sectional view of the upper housing, the mounting bracket, the diaphragm bracket and the annular diaphragm in an exploded state according to the embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at III;

fig. 8 is a partially enlarged view of the portion iv in fig. 6.

Reference numerals:

the device comprises an upper shell 10, an avoiding through hole 11, a convex edge 12, a limiting fixture block 121, a guide inclined surface 1211, a vent hole 13, a bearing part 14, a mounting bracket 15 and a second mounting groove 16;

the lower shell 20, an adjusting screw hole 21, a vent pipeline 22 and an annular convex edge 23;

a microswitch 30;

the diaphragm assembly 40, the diaphragm bracket 41, the push rod 411, the limiting groove 412, the first mounting groove 413, the annular diaphragm 42, the first fixture block 421 and the second fixture block 422;

a spring 50;

adjusting bolt 60, groove 61, limit protrusion 611;

and a cover 70.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the directions or positional relationships indicated by the upper, lower, front, rear, left, right, etc. are the directions or positional relationships shown on the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are several, greater than, less than, exceeding, above, below, within, etc., the terms, wherein several means are one or more, and several means are two or more, and greater than, less than, exceeding, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

In the description of the present invention, if the terms first, second, etc. appear, they are only used for distinguishing technical features, but they are not to be interpreted as indicating or implying relative importance or implying that the number of the indicated technical features is indicated or that the precedence of the indicated technical features is implied.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, a wind pressure switch according to an embodiment of the present invention includes an upper case 10, a lower case 20, a micro switch 30, a diaphragm assembly 40, a spring 50, and an adjusting bolt 60.

Go up to be equipped with the malleation on casing 10 and detect the mouth, be equipped with the negative pressure on casing 20 down and detect the mouth, micro-gap switch 30 installs on last casing 10 through the mode detachably of joint, and the moving contact that corresponds micro-gap switch 30 on going up casing 10 is equipped with dodges through-hole 11, diaphragm assembly 40 sets up between last casing 10 and casing 20 down, diaphragm assembly 40 and last casing 10 enclose into the positive pressure chamber, diaphragm assembly 40 and casing 20 down enclose into the negative pressure chamber, and diaphragm assembly 40 is equipped with the corresponding push rod 411 of moving contact with micro-gap switch 30 towards one side of last casing 10, spring 50 sets up between diaphragm assembly 40 and casing 20 down, be equipped with regulation screw 21 down on casing 20, adjusting bolt 60 wears to locate in the regulation screw 21 and with spring 50 looks butt.

Communicating a negative pressure detection port on the lower shell 20 with a negative pressure area of the volute of the exhaust fan, and communicating a positive pressure detection port on the upper shell 10 with the outside; before use, the adjusting bolt 60 in the adjusting screw hole 21 is adjusted to apply a force to the spring 50, so that the spring 50 provides a pre-tightening force to the diaphragm assembly 40, and the diaphragm assembly 40 moves upward and the push rod 411 abuts against the moving contact of the micro-switch 30; in the use, when the condition of airing exhaust is good, atmospheric pressure in the negative pressure cavity reduces for atmospheric pressure in the positive pressure cavity is greater than atmospheric pressure in the negative pressure cavity, and at this moment, diaphragm assembly 40 overcomes the effort of spring 50 and moves down and makes push rod 411 and micro-gap switch 30's moving contact separation, and when the condition of airing exhaust was bad, diaphragm assembly 40 moved up and made push rod 411 support in micro-gap switch 30's moving contact under spring 50's effort, thereby in time close the gas channel. Wherein, micro-gap switch 30 installs on last casing 10 through the mode detachably of joint, and the installation of being convenient for is favorable to improving the efficiency when production equipment to shorten the cycle of production and processing, add man-hour when needs mass production, can satisfy the production demand, be convenient for moreover maintain, be favorable to improving the efficiency of maintenance.

Referring to fig. 1, 4 and 5, in some embodiments, a convex edge 12 is disposed upward at the top of the upper housing 10, the convex edge 12 and the upper housing 10 form a slot, the micro switch 30 is disposed in the slot, a limiting block 121 is disposed at the top of the convex edge 12 corresponding to the top of the micro switch 30, and a guide inclined surface 1211 is disposed on the limiting block 121. The micro switch 30 is clamped into the slot by the guiding action of the guiding inclined plane 1211, and the micro switch 30 clamped into the slot is limited by the limiting fixture block 121, so that the micro switch 30 is installed and fixed. It should be noted that the convex edge 12 has a certain amount of elastic deformation, and in the process that the micro switch 30 is clamped into the clamping groove through the guiding effect of the guiding inclined plane 1211, the convex edge 12 is elastically deformed by the force, so that the micro switch 30 is clamped into the clamping groove, and after the micro switch 30 is clamped into the clamping groove, the side wall of the micro switch 30 is tightly fitted with the inner wall of the clamping groove, which is beneficial to enhancing the stability of the micro switch 30 in the working process.

Referring to fig. 1 and 2, in some embodiments, the negative pressure detection port is a nozzle of a vent pipe 22 provided on the lower case 20 and communicating with the negative pressure chamber, and the positive pressure detection port is a vent hole 13 provided on the upper case 10. The condition that the positive pressure detection port is communicated with the negative pressure area of the volute of the exhaust fan when sampling is carried out through the negative pressure detection port is favorably avoided, so that the normal work of the wind pressure switch is ensured.

Referring to fig. 4 and 5, in some embodiments, the vent 13 is disposed below the micro switch 30, the top of the upper housing 10 is provided with a raised support 14 corresponding to the micro switch 30, and the bottom of the micro switch 30 abuts against the support 14 with a gap from the upper housing 10. Hide air vent 13 in micro-gap switch 30's below, can further avoid when sampling through negative pressure detection mouth with malleation detection mouth intercommunication in the negative pressure zone's of exhaust fan spiral case the condition, simultaneously, micro-gap switch 30's bottom butt has the clearance on bearing portion 14 and between the last casing 10, forms a intercommunication passageway for air vent 13 can be linked together with the external world, in order to guarantee that the wind pressure switch can normally work.

Referring to fig. 1, 2, 4 and 6, in some embodiments, the wind pressure switch further includes a mounting bracket 15 disposed on the upper housing 10 for mounting and fixing the wind pressure switch.

It should be noted that, in some embodiments, the mounting bracket 15 is connected to the upper casing 10 by a screw, and of course, the mounting bracket 15 may also be integrally formed on the upper casing 10, which is not limited herein.

Referring to fig. 1, 2 and 6, in some embodiments, the diaphragm assembly 40 includes a diaphragm support 41 and an annular diaphragm 42, the main body of the diaphragm support 41 is circular, the inner edge of the annular diaphragm 42 is connected to the outer periphery of the diaphragm support 41, the outer edge of the annular diaphragm 42 is sandwiched between the upper case 10 and the lower case 20, and the push rod 411 is disposed on the diaphragm support 41. When the air exhaust condition is good, the annular diaphragm 42 drives the diaphragm support 41 to overcome the acting force of the spring 50 to move downwards under the action of the pressure difference and separate the push rod 411 from the moving contact of the micro switch 30, and when the air exhaust condition is bad, the diaphragm support 41 moves upwards under the acting force of the spring 50 and enables the push rod 411 to abut against the moving contact of the micro switch 30, so that the gas channel is closed in time.

Referring to fig. 6 to 8, in some embodiments, a first stopper 421 is disposed at an inner edge of the annular membrane 42, a second stopper 422 is disposed at an outer edge of the annular membrane 42, a first mounting groove 413 matched with the first stopper 421 is disposed at an outer periphery of the membrane holder 41, and a second mounting groove 16 matched with the second stopper 422 is disposed on the upper housing 10. The first latch 421 is clipped in the first mounting groove 413, and the second latch 422 is clipped in the second mounting groove 16, so as to realize the mounting and fixing of the annular membrane 42. It should be noted that the second mounting groove 16 may also be disposed on the lower housing 20, which is not limited herein.

It should be noted that, in some embodiments, the first fixture block 421, the second fixture block 422, the first installation groove 413, and the second installation groove 16 are all annular, of course, the first fixture block 421 and the first installation groove 413 may also be annular, the second fixture block 422 and the second installation groove 16 are both provided with a plurality of fixture blocks and are distributed annularly, or the first fixture block 421, the second fixture block 422, the first installation groove 413, and the second installation groove 16 are all provided with a plurality of fixture blocks and are distributed annularly, which is not limited herein.

Referring to fig. 2 and 3, in some embodiments, a limiting groove 412 is formed on a side of the diaphragm support 41 facing the lower housing 20, and an end of the spring 50 near the diaphragm support 41 is disposed in the limiting groove 412. The limiting groove 412 is used for limiting the spring 50, so that the spring 50 is prevented from moving in the up-and-down moving process of the diaphragm support 41, and the stability of the wind pressure switch in the working process is improved.

Referring to fig. 2 and 3, in some embodiments, a groove 61 is formed at an end of the adjusting bolt 60 facing the spring 50, a limiting protrusion 611 is formed in the groove 61, and an end of the spring 50 close to the lower housing 20 is disposed in the groove 61 and sleeved on the limiting protrusion 611. Through the limiting effect of the limiting protrusion 611 on the spring 50, the spring 50 is further prevented from moving in the up-and-down moving process of the diaphragm support 41, and the stability of the wind pressure switch in the working process is further improved.

Referring to fig. 1 to 3, in some embodiments, the bottom of the lower housing 20 is provided with an annular flange 23 facing downward at the edge of the adjustment screw hole 21, and the annular flange 23 is covered with a sealing cover 70. When the adjusting bolt 60 is protected, dust, oil smoke and the like can be prevented from entering the adjusting screw hole 21 to influence the adjustment of the adjusting bolt 60, and the dust, the oil smoke and the like can be prevented from entering the wind pressure switch.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", and "some examples", etc., it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wind pressure switch, comprising:

the device comprises an upper shell (10), wherein a positive pressure detection port is formed in the upper shell (10);

the device comprises a lower shell (20), wherein a negative pressure detection port is formed in the lower shell (20);

the microswitch (30) is detachably arranged on the upper shell (10) in a clamping manner, and an avoidance through hole (11) is formed in the upper shell (10) corresponding to a moving contact of the microswitch (30);

the diaphragm assembly (40) is arranged between the upper shell (10) and the lower shell (20), a positive pressure cavity is enclosed by the diaphragm assembly (40) and the upper shell (10), a negative pressure cavity is enclosed by the diaphragm assembly (40) and the lower shell (20), and a push rod (411) corresponding to a moving contact of the microswitch (30) is arranged on one side, facing the upper shell (10), of the diaphragm assembly (40);

a spring (50) disposed between the diaphragm assembly (40) and the lower housing (20);

the adjusting bolt (60) is arranged on the lower shell (20), an adjusting screw hole (21) is formed in the lower shell, and the adjusting bolt (60) penetrates through the adjusting screw hole (21) and is abutted to the spring (50).

2. The wind pressure switch according to claim 1, wherein a convex edge (12) is provided upward on the top of the upper housing (10), the convex edge (12) and the upper housing (10) form a slot, the micro switch (30) is disposed in the slot, a limit block (121) is provided on the top of the convex edge (12) corresponding to the top of the micro switch (30), and a guide inclined plane (1211) is provided on the limit block (121).

3. The wind pressure switch according to claim 1, wherein the negative pressure detection port is a port of a ventilation duct (22) provided in the lower housing (20) and communicating with the negative pressure chamber, and the positive pressure detection port is a ventilation hole (13) provided in the upper housing (10).

4. The wind pressure switch according to claim 3, wherein the vent hole (13) is disposed below the micro switch (30), the top of the upper housing (10) is provided with a raised support portion (14) corresponding to the micro switch (30), and the bottom of the micro switch (30) abuts against the support portion (14) with a gap from the upper housing (10).

5. The wind pressure switch according to claim 1, further comprising a mounting bracket (15) provided on the upper housing (10).

6. The wind pressure switch according to claim 1, wherein the diaphragm assembly (40) includes a diaphragm support (41) and an annular diaphragm (42), a main body of the diaphragm support (41) has a circular shape, an inner edge of the annular diaphragm (42) is connected to an outer circumference of the diaphragm support (41), an outer edge of the annular diaphragm (42) is interposed between the upper case (10) and the lower case (20), and the push rod (411) is disposed on the diaphragm support (41).

7. The wind pressure switch according to claim 6, wherein a first latch (421) is provided at an inner edge of the annular diaphragm (42), a second latch (422) is provided at an outer edge of the annular diaphragm (42), a first mounting groove (413) matched with the first latch (421) is provided at an outer periphery of the diaphragm support (41), and a second mounting groove (16) matched with the second latch (422) is provided on the upper housing (10) or the lower housing (20).

8. The wind pressure switch according to claim 6, wherein a side of the diaphragm support (41) facing the lower housing (20) is provided with a limiting groove (412), and an end of the spring (50) near the diaphragm support (41) is disposed in the limiting groove (412).

9. The wind pressure switch according to claim 1, wherein a groove (61) is formed at an end of the adjusting bolt (60) facing the spring (50), a limiting protrusion (611) is formed in the groove (61), and an end of the spring (50) close to the lower housing (20) is disposed in the groove (61) and sleeved on the limiting protrusion (611).

10. The wind pressure switch according to claim 1, wherein the bottom of the lower housing (20) has an annular flange (23) facing downward at the edge of the adjustment screw hole (21), and the annular flange (23) is covered with a cover (70).