CN201318673Y

CN201318673Y - Explosion preventer

Info

Publication number: CN201318673Y
Application number: CNU2008202144089U
Authority: CN
Inventors: 陆守祥
Original assignee: HEFEI SIKE COMBUSTION PLANT CO Ltd
Current assignee: HEFEI SIKE COMBUSTION PLANT CO Ltd
Priority date: 2008-12-04
Filing date: 2008-12-04
Publication date: 2009-09-30
Anticipated expiration: 2018-12-04

Abstract

The utility model discloses an explosion preventer for industrial gas combustion systems. A lower case of the explosion preventer is externally connected on a burning line through a three-way joint; an upper case is connected on the upper case through screw threads; a film sheet is tightly pressed between the upper case and the lower case; an inner cavity of the upper case is provided with a top plate; a screw bolt which passes through the top surface of the upper case and moves up and down is fixedly connected on the top plate; a microswitch is arranged above the top surface of the upper case; and when temper occurs, the top plate is upwards propped up, conducts the microswitch through the screw bolt, and starts a controller for cutting off the gas source and giving an alarm, so the industrial combustion systems are accurately, safely and sensitively protected. The utility model has the advantages of reliable automatic control effect, simple structure and easy implementation.

Description

Explosion-proof apparatus

Technical field:

The utility model relates to a kind of explosion-proof apparatus, and especially a kind of industrial combustion gas combustion system prevents the explosion-proof apparatus of back draft.

Background technology:

At present, the industrial combustion gas combustion system prevents that the tempering measure from mainly adopting unidirectional check device or pressure pressure relief device, and unidirectional check device is to allow the combustion gas one-way flow, when fuel gas return-flow takes place, device is closed under high pressure, stops fuel gas return-flow to source of the gas with rapid cut-out source of the gas.The pressure pressure relief device is when pipeline pressure is higher than predefined pressure, and device is opened the release combustion gas, reduces pressure, thereby reaches the purpose that prevents tempering.Unidirectional check device only can stop combustion gas to continue to the source of the gas end burning, but the inreal source of the gas that cuts off, therefore dangerous hidden danger is not eliminated, and can not report to the police to inform that the staff handles; The mode that the pressure pressure relief device is just taked to discharge combustion gas reaches the purpose that prevents tempering, source of the gas is not closed yet, the combustion gas that discharges still can form a huge potential safety hazard, and present pressure pressure relief device can not be reported to the police to inform that the staff handles.In sum, conventional device can only prevent tempering to the source of the gas end burning, inreal cut-out source of the gas, and can not report to the police and make caution, therefore have very big defective.

The utility model content:

For overcoming the defective of prior art, the purpose of this utility model is to provide the explosion-proof apparatus that is applied to the industrial combustion gas combustion system a kind of dynamo-electric combination, can send alarm signal and start-up control device cut-out source of the gas when tempering takes place.

The utility model technical solution problem adopts following technical scheme:

A kind of explosion-proof apparatus, described explosion-proof apparatus has: one is external on the gas pipeline and forms the lower house of threeway with gas pipeline; A upper shell that removably is connected with this lower house is crimped with the diaphragm that can form sealing to lower housing cavity between the upper and lower casing; A top board, described top board is arranged at the inner chamber of upper shell, and the central vertical of top board connects firmly a bolt that passes the upper shell end face and can move up and down; A microswitch, described microswitch is located at the top of described upper shell end face; Described top board has two duties: under the non-pressure release state, top board is suspended in the inner chamber of upper shell by the bolt of the center; Under the pressure release state, top board drive bolt moves upward and triggers the contact of microswitch; Described upper shell body radially offers relief hole, under the pressure release state, and the inner chamber conducting of described relief hole and lower house.

The vertical section of described lower housing cavity is "T"-shaped, is provided with a punched-plate that can freely move up and down on the step surface of lower housing cavity, and this punched-plate is in the below of described diaphragm.

Explosion-proof apparatus also has an outer cover, and outer cover is connected on the upper shell end face and with described microswitch by bolt and covers.

The top of lower house is external screw thread, and the bottom of described upper shell is an internal thread, is threaded between the upper and lower casing.

Also be provided with a pressure ring between the described upper and lower casing, described pressure ring places the top of described diaphragm, by described pressure ring described diaphragm is compressed between the upper and lower casing.

Described diaphragm is an aluminium foil.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

Explosion-proof apparatus of the present utility model has automatically controlled and mechanical control two functions concurrently; high pressure gas is broken through aluminium foil and is promoted top board and moves upward when tempering takes place; bolt on the top board triggers the contact on the microswitch and sends a signal of telecommunication; starting central controller closes work system and cuts off source of the gas; alarm circuit is switched on and reports to the police simultaneously; thereby accurately, safety, safeguard industries combustion system delicately; the utlity model has and control effect reliably automatically; and explosion-proof apparatus is simple in structure, and is easy to implement.

Description of drawings:

Fig. 1 is a structural representation of the present utility model, high-pressure gas trend when arrow is depicted as tempering.

Fig. 2 is the vertical view of punched-plate among Fig. 1.

Fig. 3 is that the A of upper shell among Fig. 1 is to profile.

Fig. 4 is under the non-pressure release state, the contact position graph of a relation of top board, upper shell end face and microswitch.

Fig. 5 is under the pressure release state, the contact position graph of a relation of top board, upper shell end face and microswitch.

Number in the figure: 1 lower house, 2 upper shells, 3 diaphragms, 4 top boards, 5 bolts, 6 microswitches, 7 punched-plates, 8 pressure rings, 9 outer covers, 101 step surfaces, 201 inner flanges, 202 upper shell end faces, 203 relief holes, 701 punchings.

Below pass through the specific embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

The specific embodiment,

Non-limiting examples is as described below:

Embodiment: shown in Figure 1, the explosion-proof apparatus of present embodiment has a roughly cylindrical circular lower house 1, lower house is external on the industrial combustion gas pipeline by three-way connection, the top of lower house 1 is external screw thread, the bottom of upper shell 2 is an internal thread, be threaded between the upper and lower casing and form common inner chamber, upper shell has an inner flange 201 that radially extends to inner chamber, the diaphragm 3 that crimping is made by aluminium foil between the upper surface of the lower surface of inner flange 201 and lower house 1, diaphragm 3 is revealed the inner chamber sealing of lower house 1 to prevent combustion gas.Be provided with a top board 4 in the inner chamber of upper shell 2, the center of top board 4 connects firmly a bolt 5, and bolt passes upper shell end face 202, and this bolt 5 can be moved up and down by top board 4 drives in the hole of upper shell end face 202.Microswitch 6 is located at the top of upper shell end face 202, the contact 601 and bolt 5 central axes of microswitch 6.

Shown in Fig. 1,4, under non-pressure release (operate as normal) state, top board 4 drops on the upper surface of the inner flange 201 of upper shell because of self gravitation, shown in Fig. 1,5, under pressure release (generation tempering) state, the pressure of lower house 1 inner chamber sharply increases, high-pressure gas breaks through diaphragm 3 and enters the upper shell inner chamber and promote top board 4 and move upward, the contact 601 of the bolt 5 pushing tow microswitches 6 that connect firmly with top board, microswitch 6 conductings also start central controller cut-out source of the gas, alarm circuit is switched on and sends warning simultaneously, deals with to inform the staff.Referring to Fig. 3, when diaphragm 3 was broken through, the relief hole of radially offering on upper shell 2 bodies 203 and the inner chamber conducting of lower house discharged combustion gas the purpose that reaches pressure release.

Shown in Fig. 1,2, as a kind of improved procedure of the present utility model, the vertical section of lower housing cavity is "T"-shaped, on the step surface 101 of lower housing cavity, be provided with a punched-plate that can freely move up and down 7, offer the punching 701 of some up/down perforations on the punched-plate, under the pressure release state, high-pressure gas jack-up punched-plate 7, be close to the lower surface of diaphragm 3 at punched-plate in a flash, high-pressure gas concentrates on several punchings 701 places, and pressure increases, and is easier to diaphragm 3 is broken through, reach the purpose of warning, the existence of punched-plate can assist high-pressure gas to break through aluminium foil.

Shown in Figure 1, as another improved procedure of the present utility model, explosion-proof apparatus also has a pressure ring 8, during installation, pressure ring places between the lower surface and diaphragm 3 of upper shell inner flange 201, diaphragm 3 places the upper surface of lower house 1, and when tightening by screw thread between the upper and lower casing, pressure ring 8 can be pressed in diaphragm 3 between the upper and lower casing tightly, can play better sealing function on the one hand, on the other hand, because diaphragm is thinner, adopt pressure ring easier diaphragm to be compressed.

Shown in Figure 1, as another improved procedure of the present utility model, explosion-proof apparatus also has an outer cover 9, and outer cover 9 is connected in the top of upper shell end face 202 by bolt, and outer cover 9 covers microswitch 6, and is both attractive in appearance, plays the purpose of protection microswitch again.

Claims

1, a kind of explosion-proof apparatus is characterized in that, described explosion-proof apparatus has:

One is external on the gas pipeline and forms the lower house (1) of threeway with gas pipeline;

A upper shell (2) that removably is connected with this lower house (1) is crimped with the diaphragm (3) that can form sealing to lower housing cavity between the upper and lower casing;

A top board (4), described top board is arranged at the inner chamber of upper shell (2), and the central vertical of top board connects firmly a bolt (5) that passes upper shell end face (202) and can move up and down;

A microswitch (6), described microswitch are located at the top of described upper shell end face (202);

Described top board (4) has two duties: under the non-pressure release state, top board (4) is suspended in the inner chamber of upper shell (2) by the bolt (5) of the center; Under the pressure release state, top board (4) drive bolt (5) moves upward and triggers the contact (601) of microswitch (6);

The body of described upper shell (2) radially offers relief hole (203), under the pressure release state, and the inner chamber conducting of described relief hole (203) and lower house (1).

2, explosion-proof apparatus according to claim 1, it is characterized in that, the vertical section of described lower house (1) inner chamber is "T"-shaped, is provided with a punched-plate that can freely move up and down (7) on the step surface (101) of lower housing cavity, and this punched-plate (7) is in the below of described diaphragm (3).

3, explosion-proof apparatus according to claim 1 is characterized in that, described explosion-proof apparatus also has an outer cover (9), and described outer cover (9) is connected in upper shell end face (202) by bolt and goes up and described microswitch (6) is covered.

4, explosion-proof apparatus according to claim 1 is characterized in that, the top of described lower house (1) is external screw thread, and the bottom of described upper shell (2) is an internal thread, is threaded between the upper and lower casing.

5, according to claim 1,2 or 4 described explosion-proof apparatus, it is characterized in that, also be provided with a pressure ring (8) between the described upper and lower casing, described pressure ring places the top of described diaphragm (3), by described pressure ring (8) described diaphragm (3) is compressed between the upper and lower casing.

6, explosion-proof apparatus according to claim 1 and 2 is characterized in that, described diaphragm (3) is an aluminium foil.