KR102588202B1 - Venturi equipment with cam damper - Google Patents

Abstract

The present invention relates to a venturi device equipped with a cam-type damper. The damper is rotated by a servomotor to open the mixing passage, supplying air to the mixing passage, and the opening and closing rod is connected to the opening and closing valve using a rotating cam that rotates integrally with the damper. By pressing in the inward direction, the mixing passage and the large-diameter gas passage are simultaneously opened by the damper, and the amount of gas supplied into the mixing passage through the large-diameter gas passage is made to correspond to the amount of air supplied into the mixing passage.
According to the present invention, the mixing passage is opened by the rotation of a single damper, and a rotating cam that rotates integrally with the damper presses and operates the opening and closing rod of the opening and closing valve to open the large-diameter gas passage, thereby allowing gas and air to flow into the mixing passage. is supplied at the same time, and the opening area of the mixing passage and the retracting movement distance of the opening and closing rod, which is pressed by the rotating cam, are adjusted at the same time to correspond to the rotation angle of the damper, so that the opening area of the mixing passage and the opening area of the opening and closing valve are automatically adjusted. In particular, the amount of air supplied through the large-diameter gas channel is automatically adjusted to correspond to the amount of air supplied through the mixing channel by the rotary operation of the damper, and the mixing ratio of the mixed gas mixed within the internal housing is maintained. By maintaining the mixing ratio of the mixed gas, the ignition performance of the combustion device is improved and explosion ignition is prevented, which has the advantage of improving product reliability.

Description

Venturi equipment with cam damper

The present invention relates to a venturi device, and more specifically, a damper is rotated by a servomotor to open the mixing passage of the internal housing, and the opening/closing rod of the opening/closing valve is pressed by the rotating cam of the damper, thereby opening the opening/closing valve. Thus, gas is supplied into the mixing passage through the small-diameter gas passage and the large-diameter gas passage of the external housing, and at the same time, the air supplied into the mixing passage is moved upward, and a cam-type damper is provided to mix the gas and air within the inner housing. It's about a venturi device.

In general, combustion devices such as boilers and water heaters used for heating and hot water use are classified into oil boilers, gas boilers, electric boilers, and water heaters depending on the fuel supplied, and are developed and used in various ways to suit the installation purpose. .

Among these combustion devices, especially gas boilers and water heaters, a Bunsen burner or a premixed burner is generally used to combust gas fuel, of which the premixed burner is a combustion method. After mixing gas and air at the optimal combustion ratio, the mixture (air + gas) is supplied to the flame hole for combustion.

Patent Document 1 relates to a conventional venturi device for a boiler. In more detail, it is hollow, forming an air inlet at the bottom, forming a gas inlet on the outer surface, and forming an outlet on the upper outer surface opposite to the gas inlet. , a mixing section formed by a blowing fan that is rotatably driven on the inner upper part to induce air and gas to flow through the air inlet and gas inlet, and a gas supply section connected to the gas inlet to supply gas to the gas inlet, and the air in the mixing section. It is installed at a set distance from the inlet and consists of an air supply control device that adjusts the gap between the air inlets and the air supply amount flowing into the air inlet while operating up and down.

Here, the opening area at the bottom of the mixing section is adjusted as the gap variable section is raised and lowered by the drive motor of the air supply volume control device, and at this time, an amount of air proportional to the opening area at the bottom of the mixing section is released into the mixing section. It is supplied inside and mixed with the gas flowing into the mixing section through the gas inlet.

At this time, the amount of gas supplied through the gas inlet is controlled by the gas supply unit, and the supply amount is adjusted.

However, in Patent Document 1 as described above, the amount of air flowing in between the bottom of the mixing section and the gap variable section and the amount of gas supply flowing through the gas inlet are adjusted respectively, so that there is an error in the mixing ratio of the mixed gas mixed in the mixing section. occurs, and if gas or air is biased into the mixed gas, the explosion ignition or ignition performance in the combustion device decreases rapidly due to an error in the mixing ratio. While controlling the gas supply unit and the air supply volume control device separately, the mixing unit There is an inconvenience in having to adjust the amount of gas flowing in through the gas inlet in proportion to the amount of air supplied inside, and as air enters the gap between the bottom of the mixing section and the gap variable section, resonance and noise are caused, making it inconvenient to use. There is a problem that the reliability of the product is reduced accordingly.

KR 10-2020-0078770 A

The present invention is to solve the problems described above, and the object of the present invention is to provide an inner housing with a mixing flow path formed on the inside, and to be installed to surround the outside of the inner housing, so that a gas flow path is provided between the inner housing and the inner housing. It is provided with an external housing having a small diameter gas flow path in communication with the gas flow path and a large diameter gas flow path in communication with the mixing flow path on the outer surface, and an opening and closing rod that is exposed to the mixing flow path and operates in a sliding manner within the large diameter gas flow path. The formed opening/closing valve is installed and rotated to open the mixing passage within the mixing passage, and a damper is installed to press the opening/closing rod with a rotating cam formed on the bottom of the mixing passage, and a servo motor connected to the damper is installed on the outer peripheral surface of the external housing, To open the mixing passage, the damper is rotated by a servomotor to supply air to the mixing passage, and the opening and closing rod is pressed toward the inside of the opening and closing valve using a rotating cam that rotates integrally with the damper, and the damper is used to open the mixing passage and the large diameter. To provide a venturi device with a cam-type damper that simultaneously opens the gas passage and allows the amount of gas supplied into the mixing passage through the large diameter gas passage to correspond to the amount of air supplied into the mixing passage.

In order to achieve the purpose of the present invention as described above, the venturi device equipped with a cam-type damper according to the present invention has a hollow shape with the upper and lower sides open, and receives air and gas simultaneously inside the venturi device to mix the gas and air. an inner housing forming a mixing passage; A large-diameter gas passage and a gas passage that are installed to surround the outer peripheral surface of the inner housing, form a gas passage between the inner housing and the gas passage, and communicate with the mixing passage of the inner housing on the outer surface to supply gas into the mixing passage. an external housing that communicates with and forms a small-diameter gas flow path for supplying gas to the gas flow path; It is installed in the large diameter gas passage of the outer housing, and is exposed to the mixing passage of the inner housing to form a sliding opening and closing rod, which is discharged into the mixing passage through the large diameter gas passage by sliding the opening and closing rod. Open/close valve to control gas volume; A damper installed in the mixing passage, rotating to open the mixing passage, pressing the opening and closing rod of the opening and closing valve with a rotating cam formed on the bottom thereof, and controlling the simultaneous supply of gas and air into the mixing passage; It is characterized in that it consists of a servo motor installed on the outer peripheral surface of the external housing and connected to the damper to adjust the rotation angle of the damper.

In the venturi device with a cam-type damper according to the present invention, the inner housing includes a guide wall on its outer surface that is in close contact with the inner peripheral surface of the outer housing and guides the inner housing to be positioned at the center of the outer housing; A guide ring is connected to the upper edge of the guide wall in a ring shape and has a dispersion discharge hole formed therebetween to guide the mixed gas mixed in the gas flow path to be evenly distributed and discharged upward. do.

In the venturi device with a cam-type damper according to the present invention, the external housing is installed on its outer surface to communicate with the small-diameter gas channel and the large-diameter gas channel, and receives gas to be supplied to the small-diameter gas channel and the large-diameter gas channel. a connector that simultaneously supplies gas to the gas flow path; a gas nozzle installed between the connector and the small-diameter gas flow path and the large-diameter gas flow path to discharge gas supplied to the connector into the small-diameter gas flow path and the large-diameter gas flow path; Packing installed between the gas nozzle and the connector to block gas leakage through a gap between the external housing and the connector.

In the venturi device equipped with a cam-type damper according to the present invention, the damper presses the opening and closing rod while opening the mixing passage, and adjusts the opening amount of the opening and closing valve to correspond to the open area of the mixing passage. , Characterized in that controlling the supply of gas in an amount corresponding to the amount of air supplied into the mixing passage through the large diameter gas passage of the external housing into the mixing passage.

In the venturi device with a cam-type damper according to the present invention, the outer housing is protruding so as to be located within the mixing passage of the inner housing, and allows the on-off valve to be inserted into the large diameter gas passage formed inside the outer housing. A valve housing is further formed, and the damper includes an opening and closing plate in the shape of a plate that is rotated by the servomotor to open or block the mixing passage; A stopper is installed in a pair symmetrically on the upper surface of the opening and closing plate, is in close contact with the outer wall of the valve housing, and blocks the opening and closing plate that blocks the mixing passage from rotating beyond a predetermined angle. do.

In the venturi device equipped with a cam-type damper according to the present invention, the rotating cam of the damper has an imaginary horizontal line passing through the center of the damper rotated to block the mixing passage and an imaginary vertical line passing through the center of the damper. Based on , a first curved portion is formed on the lower right side, and a second curved portion is formed on the lower left side, and the first curved portion causes the opening and closing rod to enter the opening and closing valve at a predetermined depth by rotation of the damper. , the circular arc diameter of the second curved portion is formed to be relatively larger than the diameter from the center of the damper to the arc of the first curved portion, and the circular arc diameter of the second curved portion is formed to be relatively larger than that between the first curved portion and the second curved portion by rotation of the damper. When the point reaches the opening and closing rod, the opening and closing rod is entered relatively deeper into the opening and closing valve compared to the first curved portion.

In the venturi device equipped with a cam-type damper according to the present invention, the rotating cam of the damper gradually increases the arc diameter from a designated point A of the first curved portion to a point between the first curved portion and the second curved portion. It is formed large, but the arc diameter between the point A and the point A is characterized in that it is formed relatively smaller than the arc diameter of the point between the first curved portion and the second curved portion.

In the venturi device with a cam-type damper according to the present invention, the second curved portion is characterized in that the arc diameter of the second curved portion is formed to be the same as the arc diameter of the point between the first curved portion and the second curved portion.

In the venturi device equipped with a cam-type damper according to the present invention, the rotating cam of the damper is an extension extending upward from the first curved portion above the horizontal line, based on an imaginary horizontal line passing through the center of the damper. It is characterized by further forming a curved portion.

In the venturi device equipped with a cam-type damper according to the present invention, the opening/closing valve is in the shape of a hollow tube with front and rear open, and forms a gas inflow path that receives gas from the large diameter gas flow path at the inner rear end. and a valve body formed in a multi-stage structure to communicate with the gas inlet path at the front end and forming a gas discharge path that guides the gas introduced through the gas inlet path to be discharged into the mixing flow path; It is installed between the gas inlet path and the gas discharge path of the valve body, allows the opening and closing rod to be fastened through the central part, and is pushed by the opening and closing rod entering the valve body to move between the gas inflow path and the gas discharge path. Open sealed packing; It is installed to close the rear end of the valve body, allows the end of the opening and closing rod to be fastened to the central portion, and is formed in a plurality of rings spaced apart at predetermined intervals around the outer circumference of the central portion, so that the gas is distributed and supplied to the gas inlet. Rod guide forming a distribution hole; It is characterized in that it consists of an elastic spring installed between the sealed packing and the rod guide to press the sealed packing in the direction of the gas discharge path.

In the venturi device with a cam-type damper according to the present invention, the sealing packing moves backward in the direction of the gas inlet path while pressing the elastic spring in proportion to the entry depth of the opening and closing rod entering the valve body. , characterized in that the open area between the gas inlet path and the gas discharge path is adjusted.

In the venturi device equipped with a cam-type damper according to the present invention, the opening and closing rod is in close contact with the front surface of the sealed packing on its outer surface, and enters into the valve body by pressing and pressurizing the sealed packing in the direction of the gas inflow path. A protrusion is formed, and is recessed at the rear end of the press-fit protrusion to form a fastening groove that allows seating and coupling of the sealing packing, and the sealing packing has a passage hole formed in its central portion through which the opening and closing rod passes, and the passage is formed. It is characterized by further forming a seating protrusion that protrudes along the inner peripheral surface of the hole and is seated and fixed in the fastening groove.

According to the present invention, the mixing passage is opened by the rotation of a single damper, and a rotating cam that rotates integrally with the damper presses and operates the opening and closing rod of the opening and closing valve to open the large-diameter gas passage, thereby allowing gas and air to flow into the mixing passage. is supplied at the same time, and the opening area of the mixing passage and the retracting movement distance of the opening and closing rod, which is pressed by the rotating cam, are adjusted at the same time to correspond to the rotation angle of the damper, so that the opening area of the mixing passage and the opening area of the opening and closing valve are automatically adjusted. In particular, the amount of air supplied through the large-diameter gas channel is automatically adjusted to correspond to the amount of air supplied through the mixing channel by the rotary operation of the damper, and the mixing ratio of the mixed gas mixed within the internal housing is maintained. By maintaining the mixing ratio of the mixed gas, the ignition performance of the combustion device is improved and explosion ignition is prevented, which has the advantage of improving product reliability.

Figure 1 is a perspective view showing a venturi device equipped with a cam-type damper according to the present invention.
Figure 2 is an exploded perspective view of Figure 1.
Figure 3 is an exploded perspective view of an on-off valve equipped with a cam-type damper according to the present invention.
Figure 4 is a side cross-sectional view of a venturi device equipped with a cam-type damper according to the present invention.
Figure 5 is a side view showing a damper of a venturi device equipped with a cam-type damper according to the present invention.
6 to 7 are side cross-sectional views showing the operating state of a venturi device equipped with a cam-type damper according to the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings.

Referring to FIGS. 1 to 7, the inner housing 100 has a hollow shape with the top and bottom open, and forms a mixing passage 101 inside the housing 100 that receives air and gas simultaneously and mixes the gas and air.

The inner housing 100 receives air into the mixing passage 101 through the bottom.

The mixing passage 101 communicates with the large-diameter gas passage 202 of the external housing 200 and receives gas from the large-diameter gas passage 202.

The mixing passage 101 is closed or opened by the damper 400, and mixes gas and air to pass upward.

The open area of the mixing passage 101 of the inner housing 100 is changed to correspond to the rotation angle of the damper 400.

The inner housing 100 allows the valve housing 207 of the outer housing 200 to be located within the mixing passage 101 and communicates with the large diameter gas passage 202 formed within the valve housing 207. .

The inner housing 100 has a guide wall 102 on its outer surface that is in close contact with the inner peripheral surface of the outer housing 200 and guides the inner housing 100 to be positioned at the center of the outer housing 200, and a ring shape. A guide ring ( 103) is further formed.

The guide wall 102 is formed in plural pieces spaced apart at predetermined intervals along the outer peripheral surface of the inner housing 100, and is in close contact with the inner peripheral surface of the outer housing 200 so that the center of the inner housing 100 is closer to the outer housing 200. Be sure to maintain alignment with the center of.

The guide ring 103 is coupled to be inserted and seated on the top of the outer housing 200 to maintain the inner housing 100 coupled to the outer housing 200.

The guide ring 103 is preferably formed to be relatively larger than the open top diameter of the external housing 200.

The distributed discharge holes 103a are formed in a plurality of rings and spaced apart at predetermined intervals, so that the mixed gas mixed in the gas flow path 201 is evenly dispersed and discharged upward.

The distributed discharge holes 103a are preferably formed in an arch shape to dispersely discharge the mixed gas.

The outer housing 200 is installed to surround the outer peripheral surface of the inner housing 100, forming a gas flow path 201 between the inner housing 100 and the mixing flow path of the inner housing 100 on the outer surface ( A large diameter gas passage 202 that communicates with the gas passage 101 and supplies gas into the mixing passage 101, and a small diameter gas passage 203 that communicates with the gas passage 201 and supplies gas into the gas passage 201. ) to form.

The external housing 200 receives gas through the small-diameter gas passage 203 and simultaneously allows air to be supplied through the bottom of the gas passage 201, mixing gas and air and discharging them upward.

The external housing 200 has a blowing fan (not shown) installed at the top, and an air supply pipe (not shown) that allows the inflow of external air at the bottom and supplies air to the bottom of the external housing 200. Connect and install.

The external housing 200 continuously supplies a predetermined amount of gas into the gas passage 201 through a small diameter gas passage 203.

The external housing 200 supplies a relatively large amount of gas through the large-diameter gas channel 202 compared to the small-diameter gas channel 203, and the amount of gas passing through the large-diameter gas channel 202 is as follows. It is proportional to the open area of the on-off valve 300.

The large diameter gas passage 202 guides gas to be supplied into the mixing passage 101 of the inner housing 100.

The external housing 200 is installed on its outer surface to communicate with the small-diameter gas channel 203 and the large-diameter gas channel 202, and receives gas to flow into the small-diameter gas channel 203 and the large-diameter gas channel ( A connector 204 that simultaneously supplies gas to the connector 202), and a gas supplied to the connector 204, which is installed between the connector 210 and the small diameter gas passage 203 and the large diameter gas passage 202. A gas nozzle 205 that discharges gas to the small diameter gas flow path 203 and the large diameter gas flow path 202, is installed between the gas nozzle 205 and the connector 204, and is connected to the external housing 200. It further includes a packing 206 that blocks gas from leaking through the gap between the connector 204 and the connector 204.

The connector 204 is connected to an externally installed gas pipe (not shown) or a gas hose (not shown), and supplies gas to the small-diameter gas passage 203 and the large-diameter gas passage 202.

The gas nozzle 205 is formed to be relatively smaller than the diameter of the small-diameter gas channel 203 or the large-diameter gas channel 202, and is connected to the small-diameter gas channel 203 and the small-diameter gas channel 202 through the connector 204. The gas supplied to the large-diameter gas channel (202) is discharged and sprayed into the small-diameter gas channel (203) and the large-diameter gas channel (202).

The packing 206 is preferably made of rubber or silicone to block gas leakage.

The outer housing 200 is protruding so as to be located within the mixing passage 101 of the inner housing 100, and allows the opening/closing valve 300 to be inserted into the large diameter gas passage 202 formed inside the outer housing 200. A valve housing 207 is further formed.

The valve housing 207 penetrates the inner housing 100 and is located in the mixing passage 101, and in that state, the gas passing through the large diameter gas passage 202 is supplied into the mixing passage 101. Please guide as much as possible.

The valve housing 207 allows the stopper 403 of the damper 400 to be closely attached to its front edge, thereby limiting the rotation of the damper 400.

The opening/closing valve 300 is installed in the large diameter gas passage 202 of the outer housing 200, and is exposed into the mixing passage 101 of the inner housing 100 to form an opening/closing rod 301 that is slidably operated. , the opening and closing rod 301 is operated by sliding to adjust the amount of gas discharged into the mixing passage 101 through the large diameter gas passage 202.

The opening/closing rod 301 is pressed against the rotating cam 401 of the damper 400 and enters the opening/closing valve 300, thereby opening the opening/closing valve 300.

The opening area of the opening/closing valve 300 is adjusted by the sliding opening/closing rod 301, allowing an amount of gas proportional to the opening area to pass through the large diameter gas passage 202.

The opening/closing valve 300 is installed in the valve housing 207 of the external housing 200 to block or open the large diameter gas passage 202.

The opening/closing valve 300 has a hollow tubular shape with front and rear openings, and forms a gas inlet path 302a for receiving gas from the large-diameter gas flow path 202 at the inner rear end, and the gas inflow path 302a at the front end. A valve body ( 302), and is installed between the gas inlet path (302a) and the gas discharge path (302b) of the valve body 302, and allows the opening and closing rod 301 to be fastened through the center portion, and the valve body 302 ) A sealed packing 303 that opens between the gas inlet path 302a and the gas discharge path 302b by being pushed by the opening and closing rod 301 entering the inside, is installed to close the rear end of the valve body 302, and A gas distribution hole 304a that allows the end of the opening and closing rod 301 to be fastened to the central portion and is formed in a plurality of rings spaced apart at predetermined intervals around the outer circumference of the central portion to distribute gas and supply it to the gas inlet path 302a. A rod guide 304 is formed, and an elastic spring 305 is installed between the sealed packing 303 and the rod guide 304a to press the sealed packing 303 in the direction of the gas discharge path 302b. It is composed.

The valve body 302 receives gas through the gas inlet path 302a and moves the gas toward the gas discharge path 302b.

The valve body 302 is in close contact with the inner peripheral surface of the large-diameter gas channel 202 on its outer surface, and has a packing (unmarked) that allows gas to leak through the gap between the valve body 302 and the large-diameter gas channel 202. ) is further formed.

The airtight packing 303 seals between the gas inlet path 302a and the gas discharge path 302b, preventing the gas supplied to the gas inlet path 302a from moving to the gas discharge path 302b. Block it.

The airtight packing 303 is preferably made of rubber or silicone to block the movement of gas.

The sealing packing 303 moves backward in the direction of the gas inlet path 302a while pressing the elastic spring 305 in proportion to the entry depth of the opening and closing rod 301 entering the valve body 302. , the open area between the gas inlet path (302a) and the gas discharge path (302b) is adjusted.

The sealed packing 303 is located at the end of the opening and closing rod 301 at the first curved portion 401a of the rotary cam 401 or at a point between the first curved portion 401a and the second curved portion 401b. Once positioned, it moves backward by being pushed by the opening and closing rod 301, thereby adjusting the open area between the gas inlet path 302a and the gas discharge path 302b.

The rod guide 304 guides the gas to be dispersed through the gas injection hole 304a and supplied around the edge of the gas inlet path 302a.

The rod guide 304 supports the end of the opening and closing rod 301, which is slidably operated to enter the valve body 302, and guides the opening and closing rod 301 to move horizontally.

The elastic spring 305 is pressed and compressed by the sealing packing 303, which moves backward in the direction of the gas inlet path 302a by the opening and closing rod 301, and is restored to its original state when the opening and closing rod 301 is released. While doing this, the sealed packing 303 is pressed in the direction of the gas discharge path 302b so that the sealed packing 303 is returned to its original position.

The opening/closing rod 301 is in close contact with the front of the sealing packing 303 on its outer surface, and presses and presses the sealing packing 302 in the direction of the gas inlet path 302a while entering the valve body 302. A protrusion (301a) is formed, and a fastening groove (301b) is formed by recessing the rear end of the press-fitting protrusion (301a) to allow seating and coupling of the sealed packing (303).

The press-fitting protrusion 301a is formed in a ring shape, and is preferably pressed against the entire edge of the passage hole 303a of the sealed packing 303 to move the sealed packing 303 backward.

The airtight packing 303 forms a through hole 303a through which the opening and closing rod 301 passes in its central portion, is formed to protrude along the inner peripheral surface of the through hole 303a, and is seated and fixed in the fastening groove 301b. A seating protrusion 303b is further formed.

It is preferable that the diameter of the through hole 303a is relatively small compared to the diameter of the outer peripheral surface of the opening and closing rod 301 so that the opening and closing rod 301 is tightly fitted.

The shape of the seating protrusion 303b is preferably formed to correspond to the shape of the fastening groove 301b of the opening and closing rod 301, and is seated and fixed in the fastening groove 301b.

The damper 400 is installed in the mixing passage 101 and rotates to open the mixing passage 101, and opens and closes the opening and closing rod 301 of the opening and closing valve 300 with the rotating cam 401 formed on the bottom of the damper 400. By pressing and pressurizing, the gas and air are controlled to be supplied simultaneously into the mixing passage 101.

The damper 400 blocks the mixing passage 101 while maintaining a horizontal state within the mixing passage 101, and adjusts the open area of the mixing passage 101 by rotating to a vertical state.

The damper 400 is rotated by the servomotor 500 to adjust the open area of the mixing passage 101.

The damper 400 presses the opening and closing rod 301 while opening the mixing passage 101, and adjusts the opening amount of the opening and closing valve 300 to correspond to the open area of the mixing passage 101. , Control is performed so that an amount of gas corresponding to the amount of air supplied into the mixing passage 101 is supplied into the mixing passage 101 through the large diameter gas passage 202 of the external housing 200.

The damper 400 is shaped like a plate and is rotated by the servomotor 500 to open or block the mixing passage 101. It is installed in pairs and is in close contact with the outer wall of the valve housing 207, further forming a stopper 403 that blocks the opening and closing plate 402, which blocks the mixing passage 101, from rotating beyond a predetermined angle. .

The opening/closing plate 402 is formed to correspond to the cross-sectional shape within the mixing passage 101 and opens or blocks the mixing passage 101.

The opening and closing plate 402 forms the rotating cam 401 on its bottom, so that the rotating cam 401 rotates integrally with the opening and closing plate 402 and presses the opening and closing rod 301. desirable.

The stoppers 403 are formed to be symmetrical to each other, spaced apart at a predetermined interval, and are in close contact with the outer wall edge of the valve housing 207.

The rotation cam 401 of the damper 400 is aligned with an imaginary horizontal line (HL) passing through the center (C) of the damper 400 rotated to block the mixing passage 101 and the center of the damper 400. Based on the virtual vertical line (VL) passing through (C), a first curved portion 401a is formed on the lower right side, and a second curved portion 401b is formed on the lower left side, and the first curved portion 401b is formed on the lower right side of the virtual vertical line VL. The curved portion 401a causes the opening/closing rod 301 to enter the opening/closing valve 300 to a predetermined depth by rotating the damper 400, and the arc diameter of the second curved portion 401b is determined by the rotation of the damper 400. ) is formed to be relatively larger than the diameter from the center (C) to the arc of the first curved portion (401a), and the first curved portion (401a) and the second curved portion (401a) are formed by rotation of the damper (400). When the point P between the curved portions 401b reaches the opening and closing rod 301, the opening and closing rod 301 is moved relatively deeper into the opening and closing valve 300 compared to the first curved portion 401a. Let it enter.

The center C of the first curved portion 401a is formed to be biased from the center C of the rotation cam 401 toward the opening and closing rod 301, so that the first curved portion 401a is It is formed to be biased in the direction of the opening and closing rod 301 compared to the circular arc formed based on the center C of the rotating cam 401.

The point (P) between the first curved portion (401a) and the second curved portion (401b) is relatively small compared to the distance from the center (C) of the rotary cam 401 to the first curved portion (401a). They are formed to be spaced further apart, so that the arc diameter between the first curved portion 401a and the second curved portion 401b is formed to be relatively larger than the arc diameter of the first curved portion 401a.

The rotation cam 401 of the damper 400 moves from a designated point A of the first curved portion 401a to a point P between the first curved portion 401a and the second curved portion 401b. The arc diameter is gradually increased until the point A, and the arc diameter between the point A and the point P is the point P between the first curved portion 401a and the second curved portion 401b. It is formed relatively smaller than the arc diameter of .

As the first curved portion 401a rotates, it gradually presses the opening and closing rod 301 toward the inside of the opening and closing valve 300 so as to be proportional to the circular arc diameter, thereby adjusting the opening area of the opening and closing valve 300. do.

The first curved portion 401a presses and presses the opening and closing rod 301 at a relatively thin depth compared to the pressing depth at which the opening and closing rod 301 is pressed to the point P of the rotation cam 401. .

The second curved portion 401b has an arc diameter equal to that of the point P between the first curved portion 401a and the second curved portion 401b.

The second curved portion 401b is in close contact with the opening and closing rod 301 and presses the opening and closing rod 301 to the same depth as the point P of the rotating cam 401, thereby causing the opening and closing rod 301 ) is prevented from entering relatively deeper than the depth pressed at the point P of the rotary cam 401.

The rotation cam 401 of the damper 400 extends upward from the first curved portion 401a above the virtual horizontal line HL passing through the center of the damper 400. A curved portion 401a-1 is further formed.

When the extended curved portion 401a-1 is rotated to block the mixing passage 101, the opening and closing rod 301 comes into contact with it.

The arcuate diameter of the extended curved portion 401a-1 is formed to be relatively small compared to the arcuate diameter of the first curved portion 401a, so that when the damper 400 is rotated to block the mixing passage 101, , the opening/closing rod 301 is released, and the opening/closing valve 300 is closed.

Point A of the first curved portion 401a is located in a direction inclined downward with respect to the center C of the rotary cam 401, and the point P is based on the center C. It is preferable to be formed directly below.

The servomotor 500 is installed on the outer peripheral surface of the external housing 200 and is connected to the damper 400 to adjust the rotation angle of the damper 400.

The servo motor 500 receives an external signal and adjusts the rotation angle of the damper 400.

As the servomotor 500 rotates in the forward or reverse direction, the rotation cam 401 of the damper 400 presses the opening and closing rod 301 or releases the pressing pressure of the opening and closing rod 301.

The venturi device equipped with a cam-type damper according to the present invention configured as described above is used as follows.

It is preferable that a blowing fan (not shown) is installed at the top of the external housing 200 of the venturi device equipped with a cam-type damper according to the present invention, and an air supply pipe (not shown) is installed at the bottom. However, in the following description, the blowing fan (not shown) is installed at the bottom. Descriptions of the fan (not shown) and air supply pipe (not shown) will be omitted.

In addition, in the following, the operation valve (not shown) installed in the combustion device (not shown) is operated, and the servomotor 500 operates by positioning the operation valve (not shown) in small, medium, or large positions. The explanation will be made by taking as an example that the damper 400 is rotated.

First, when the operation valve (not shown) of the combustion device (e.g., boiler or gas range) is operated, gas is discharged through a gas pipe (not shown) or gas hose (not shown) connected to the connector 204 of the external housing 100. Gas is supplied to the connector 204, and the gas is supplied to the small-diameter gas channel 203 and the large-diameter gas channel 202 of the external housing 100.

At this time, the supply amount of gas and air flowing into the mixing passage 101 of the inner housing 100 or the gas passage 201 of the outer housing 200 changes depending on the operating range of the operation valve (not shown).

In particular, when the operating valve (not shown) is not operated, the extended curved portion 401a-1 extending above the first curved portion 401a of the rotary cam 401 is connected to the opening and closing rod of the opening and closing valve 300. 301), the opening/closing rod 301 is kept in a released state, thereby blocking the inflow of gas while the opening/closing valve 300 is closed.

Here, when the control valve (not shown) is positioned in the small position, the gas supplied through the connector 204 flows between the inner housing 100 and the outer housing 200 through the small diameter gas passage 203. It is supplied to the gas flow path 201 formed in .

On the other hand, the gas flowing into the large-diameter gas channel 202 is blocked by the on-off valve 300 installed in the valve housing 207 of the external housing 200, so that the gas flows through the large-diameter gas channel 202. Flow is prevented.

In addition, the gas flowing into the small-diameter gas channel 203 through the connector 204 is sprayed and discharged in the direction of the small-diameter gas channel 203 while passing through the gas nozzle 205, and is then discharged into the small-diameter gas channel 203. Gas is supplied to the gas flow path 201 through (203), and at the same time, external air flows in through the lower end of the gas flow path 201, and the gas and air are mixed within the gas flow path 201.

Thereafter, the mixed gas mixed within the gas flow path 201 moves upward within the gas flow path 201 and then passes through the distributed discharge hole 103a formed in the guide ring 103 of the inner housing 100. By being evenly dispersed and discharged through, the mixed gas is supplied to a combustion device (not shown), and the mixed gas is ignited.

On the other hand, when the control valve is positioned in the middle, gas and air are continuously supplied to the gas flow path 201 as described above, and the mixed gas is continuously discharged upward through the distributed discharge hole 103a of the guide ring 103. is maintained, and the servomotor 500 rotates the damper 400, so that the opening and closing plate 402 of the damper 400 is rotated at a predetermined angle within the mixing passage 101.

At this time, as the opening and closing plate 402 rotates, the mixing passage 101 is opened, and at the same time, the rotation cam 401 rotates integrally with the opening and closing plate 402 to form the first curved portion 401a. ) so that the end of the opening and closing rod 301 of the opening and closing valve 300 is in contact with.

Here, the first curved portion 401a is in contact with the end of the opening and closing rod 301, and pressurizes the opening and closing rod 301, and accordingly, the opening and closing rod 301 moves into the opening and closing valve 300. As it enters, the opening area of the opening/closing valve 300 is adjusted.

That is, when the opening/closing rod 301 enters the valve body 302, the press-fitting protrusion 301a formed on the opening/closing rod 301 presses the sealing packing 303 while pressurizing it. By moving the valve body 302 backward in the direction of the gas inlet path 302a, the gas inlet path 302a of the valve body 302 and the gas discharge path 302b are separated by a predetermined distance L1.

Here, the other end opposite to the end of the opening and closing rod 301 in contact with the first curved portion 401a is supported by the rod guide 304 installed in the valve body 302, and is slidably moved in a horizontal state.

At this time, the airtight packing 303 moves backward while compressing the elastic spring 305, thereby opening the space between the gas inlet path 302a and the gas discharge path 302b.

In addition, the open area between the gas inlet path (302a) and the gas discharge path (302b) is equal to the entry depth of the opening and closing rod (301) that enters the valve body (302) and retracts the sealing packing (303). It is proportional.

Then, the gas supplied to the large-diameter gas flow path 202 through the connector 204 is sprayed and discharged into the gas inlet path 302a of the valve body 302 while passing through the gas nozzle 205, At this time, after the gas supplied to the gas inlet path (302a) moves to the gas discharge path (302b) through the gap between the gas inlet path (302a) and the gas discharge path (302b), It is discharged into the mixing passage 101 through (302b).

Here, the gas supplied to the gas inlet path (302a) through the gas nozzle 205 is distributed and supplied to the edge of the gas inlet path (302a) while passing through the gas injection hole (304a) of the rod guide (304). Thus, the gas is evenly supplied into the gas inlet path (302a).

And, by supplying air into the mixing passage 101 through the lower end of the inner housing 100 and passing it through the mixing passage 101 opened by the opening and closing plate 402, the valve housing 207 The gas supplied to the mixing passage 101 through the large diameter gas passage 202 and the air supplied into the mixing passage 101 are mixed, and the mixed gas is discharged to the upper part of the inner housing 100.

In particular, the open area between the gas inlet path 302a and the gas discharge path 302b of the on-off valve 300, which is opened by being pressed by the rotary cam 401 of the damper 400, is the opening and closing plate 402. In response to the open area of the mixing passage 101 opened by, the amount of gas supply and air supply supplied into the mixing passage 101 is automatically adjusted.

On the other hand, when the operation valve (not shown) is operated to position the operation valve (not shown) on the base, gas and air are continuously supplied to the gas passage 201 as described above, thereby dispersing the guide ring 103. The mixed gas is continuously discharged upward through the hole 103a,

By rotating the damper 400 with the servomotor 500, the point P between the first curved part 401a and the second curved part 401b of the rotation cam 401 is the opening and closing rod 301. ) When located at the end, the opening and closing rod 301 is pressed against the first curved portion 401a and enters the opening and closing rod 301. Compared to the entry depth of the opening and closing rod 301, the opening and closing valve ( 300) goes deeper into me.

If the rotation cam 401 is rotated beyond a predetermined angle so that the point P exceeds the opening and closing rod 301, the second curved portion 401b contacts the opening and closing rod 301, At this time, the arc diameter of the second curved portion 401b is formed to be the same as the arc diameter of the point P, and the second curved portion 401b connects the opening and closing rod 301 to the point P. The opening and closing rod 301 is pressed in proportion to the pressing depth.

That is, when the point P between the first curved portion 401a and the second curved portion 401b is rotated to contact the opening and closing rod 301, the opening and closing rod 301 is connected to the first curved portion ( As it enters relatively deeper than the state in contact with 401a), the airtight packing 303 is moved backward, so that the gap between the gas inlet path 302a and the gas discharge path 302b of the valve body 302 is a predetermined distance. (L2) is spaced apart.

Here, the arc diameter of the first curved portion 401a is gradually increased from point A to point P, so that the opening and closing rod 301 is rotated by the rotation cam 401. Press gradually.

At this time, by pressing the opening and closing rod 301 with the first curved portion 401a, the depth at which the opening and closing rod 301 enters the opening and closing valve 300 is the point P. (301) is pressed gradually within a relatively thinner depth than the pressing depth.

Meanwhile, by rotating the damper 400 with the servomotor 500, the point P between the first curved part 401a and the second curved part 401b is connected to the opening and closing rod 301. At the same time as it is rotated to come into contact, the open area of the mixing passage 101 is increased by the opening and closing plate 402, and the amount of air supplied to the mixing passage 101 is increased.

Then, the supply amount of gas supplied into the mixing passage 101 through the on-off valve 300 is changed to correspond to the supply amount of air supplied into the mixing passage 101, and accordingly, the amount of gas supplied into the mixing passage 101 is changed to correspond to the amount of air supplied into the mixing passage 101. The mixing ratio of gas and air is maintained.

Thereafter, the mixed gas mixed in the mixing passage 101 is supplied to a combustion device (not shown) through the upper part of the inner housing 100 as described above, and ignition of the mixed gas is performed in the combustion device (not shown). .

Then, when the damper 400 is rotated with the thermovoter 500 and the mixing passage 101 of the inner housing 100 is closed with the opening and closing plate 402, the mixing passage 101 is supplied into the mixing passage 101. The upward movement of air is blocked, and at the same time, the rotation cam 401 of the damper 400 is returned to its original position, and the pressing pressure of the opening and closing rod 301 is released.

That is, the sealing packing 303 is pressed in the direction toward the gas discharge 302b by the elastic restoring force of the elastic spring 305 in the opening and closing valve 300, and accordingly, the sealing packing 303 is pressed against the valve. By moving forward within the body 302 and sealing the gap between the gas inlet path 302a and the gas discharge path 302a, the on-off valve 300 is blocked, allowing gas to flow through the on-off valve 300. Inflow is prevented.

Here, when the damper 400 is rotated by the servomotor 500, the opening and closing plate 402 of the damper 400 is rotated so that the stopper 403 comes into close contact with the front edge of the valve housing 207, At this time, the rotation of the opening and closing plate 402 is restricted, so that the opening and closing plate 402 maintains the mixing passage 101 in a sealed state.

As described above, the damper 400 is rotated to open the mixing passage 101 of the internal housing 100, and at the same time, the opening and closing rod 301 is pressed and operated by the rotating cam 401 of the damper 400 to open and close the damper 400. The structure that allows the valve 300 to open is that the mixing passage 101 is opened by the rotational operation of the single damper 400, and the rotation cam 401, which rotates integrally with the damper 400, opens the large diameter gas passage ( By pressing and operating the opening/closing rod 301 of the on-off valve 300 to open 202), gas and air are simultaneously supplied to the mixing passage 101, and the mixing passage 101 is adjusted to correspond to the rotation angle of the damper 400. At the same time as the open area of the rotary cam 401, the retracting movement distance of the opening and closing rod 301, which is pressed and operated by the rotary cam 401, is adjusted, so that the open area of the mixing passage 101 and the opening area of the opening and closing valve 300 are automatically adjusted. , In particular, the amount of air supplied through the large diameter gas passage 202 is automatically adjusted to correspond to the amount of air supplied through the mixing passage 101 by the rotational operation of the damper 400.

The venturi device with the cam-type damper according to the present invention described above is not limited to the above-described embodiments, and is not limited to the above-mentioned embodiment, and can be used by anyone with ordinary knowledge in the field to which the present invention pertains without departing from the gist of the present invention claimed in the following claims. The technical spirit is there to the extent that anyone can make various changes and implement it.

100: Inner housing 101: Mixed flow path
102: guide wall 103: guiding ring
103a: Distributed discharge hole 200: External housing
201: gas flow path 202: large diameter gas flow path
203: Small diameter gas channel 204: Connector
205: gas nozzle 206: packing
207: Valve housing 300: Open/close valve
301: Opening and closing rod 301a: Press-fit protrusion
301b: Fastening groove 302: Valve body
302a: gas inlet 302b: gas discharge path
303: Sealed packing 303a: Pass hole
303b: Seating projection 304: Rod guide
304a: gas distribution hole 305: elastic spring
400: Damper 401: Rotating cam
401a: first curved portion 401a-1: extended curved portion
401b: second curved portion 402: opening and closing plate
403: Stopper 500: Servo motor
a: Point A C: Center
HL: Imaginary horizon P: Point
VL: imaginary vertical line

Claims (12)

An inner housing (100) that has a hollow shape with the upper and lower sides open, and has a mixing passage (101) inside the mixing passage (101) that receives air and gas simultaneously and mixes the gas and air;
It is installed to surround the outer peripheral surface of the inner housing 100, forming a gas flow path 201 between the inner housing 100 and communicating with the mixing flow path 101 of the inner housing 100 on the outer surface of the inner housing 100. An external housing formed with a large-diameter gas passage 202 that supplies gas into the mixing passage 101 and a small-diameter gas passage 203 that communicates with the gas passage 201 and supplies gas to the gas passage 201. (200);
It is installed in the large diameter gas passage 202 of the outer housing 200, and is exposed to the mixing passage 101 of the inner housing 100 to form an opening and closing rod 301 that is slidably operated. ) to control the amount of gas discharged into the mixing passage 101 through the large diameter gas passage 202 by sliding the valve 300;
It is installed in the mixing passage 101 and rotates to open the mixing passage 101, and presses the opening and closing rod 301 of the opening and closing valve 300 with the rotating cam 401 formed on the bottom thereof, A damper 400 that controls gas and air to be supplied simultaneously into the mixing passage 101;
A servo motor 500 installed on the outer peripheral surface of the external housing 200 and connected to the damper 400 to adjust the rotation angle of the damper 400;
It consists of,
The inner housing 100 is,
A guide wall (102) on the outer surface that is in close contact with the inner peripheral surface of the outer housing (200) and guides the inner housing (100) to be positioned at the center of the outer housing (200);
A guide that is connected to the upper edge of the guide wall 102 in a ring shape and has a distributed discharge hole 103a formed therebetween to guide the mixed gas mixed in the gas passage 201 to be evenly distributed and discharged upward. ring (103);
A venturi device with a cam type damper, further comprising: delete According to clause 1,
The external housing 200 is,
It is installed on its outer surface to communicate with the small-diameter gas channel 203 and the large-diameter gas channel 202, and receives gas to simultaneously supply gas to the small-diameter gas channel 203 and the large-diameter gas channel 202. a connector 204;
It is installed between the connector 204 and the small-diameter gas channel 203 and the large-diameter gas channel 202, and flows the gas supplied to the connector 204 into the small-diameter gas channel 203 and the large-diameter gas channel. Gas nozzle (205) discharging to (202);
Packing 206 installed between the gas nozzle 205 and the connector 204 to block gas leakage through the gap between the external housing 200 and the connector 204;
A venturi device with a cam type damper, further comprising: According to clause 1,
The damper 400 is,
By pressing the opening/closing rod 301 while opening the mixing passage 101, the opening amount of the opening/closing valve 300 is adjusted to correspond to the open area of the mixing passage 101, thereby opening the external housing 200. ) A venturi device with a cam-type damper, characterized in that it is controlled to supply an amount of gas corresponding to the amount of air supplied into the mixing passage 101 into the mixing passage 101 through the large diameter gas passage 202. . An inner housing (100) that has a hollow shape with the upper and lower sides open, and has a mixing passage (101) inside the mixing passage (101) that receives air and gas simultaneously and mixes the gas and air;
It is installed to surround the outer peripheral surface of the inner housing 100, forming a gas flow path 201 between the inner housing 100 and communicating with the mixing flow path 101 of the inner housing 100 on the outer surface of the inner housing 100. An external housing formed with a large-diameter gas passage 202 that supplies gas into the mixing passage 101 and a small-diameter gas passage 203 that communicates with the gas passage 201 and supplies gas to the gas passage 201. (200);
It is installed in the large diameter gas passage 202 of the outer housing 200, and is exposed to the mixing passage 101 of the inner housing 100 to form an opening and closing rod 301 that is slidably operated. ) to control the amount of gas discharged into the mixing passage 101 through the large diameter gas passage 202 by sliding the valve 300;
It is installed in the mixing passage 101 and rotates to open the mixing passage 101, and presses the opening and closing rod 301 of the opening and closing valve 300 with the rotating cam 401 formed on the bottom thereof, A damper 400 that controls gas and air to be supplied simultaneously into the mixing passage 101;
A servo motor 500 installed on the outer peripheral surface of the external housing 200 and connected to the damper 400 to adjust the rotation angle of the damper 400;
It consists of,
The external housing 200 is,
A valve housing 207 is protruded to be positioned within the mixing passage 101 of the inner housing 100 and allows the opening/closing valve 300 to be inserted into the large diameter gas passage 202 formed inside the valve housing 207. form,
The damper 400 is,
An opening/closing plate 402 in the shape of a plate that is rotated by the servomotor 500 to open or block the mixing passage 101;
The opening and closing plates 402, which are installed as a pair symmetrically on the upper surface of the opening and closing plates 402 and are in close contact with the outer wall of the valve housing 207 and block the mixing passage 101, rotate beyond a predetermined angle. A stopper (403) that blocks it from happening;
A venturi device with a cam-type damper, characterized in that it is further formed. An inner housing (100) that has a hollow shape with the upper and lower sides open, and has a mixing passage (101) inside the mixing passage (101) that receives air and gas simultaneously and mixes the gas and air;
It is installed to surround the outer peripheral surface of the inner housing 100, forming a gas flow path 201 between the inner housing 100 and communicating with the mixing flow path 101 of the inner housing 100 on the outer surface of the inner housing 100. An external housing formed with a large-diameter gas passage 202 that supplies gas into the mixing passage 101 and a small-diameter gas passage 203 that communicates with the gas passage 201 and supplies gas to the gas passage 201. (200);
It is installed in the large diameter gas passage 202 of the outer housing 200, and is exposed to the mixing passage 101 of the inner housing 100 to form an opening and closing rod 301 that is slidably operated. ) to control the amount of gas discharged into the mixing passage 101 through the large diameter gas passage 202 by sliding the valve 300;
It is installed in the mixing passage 101 and rotates to open the mixing passage 101, and presses the opening and closing rod 301 of the opening and closing valve 300 with the rotating cam 401 formed on the bottom thereof, A damper 400 that controls gas and air to be supplied simultaneously into the mixing passage 101;
A servo motor 500 installed on the outer peripheral surface of the external housing 200 and connected to the damper 400 to adjust the rotation angle of the damper 400;
It consists of,
The rotation cam 401 of the damper 400 is,
An imaginary horizontal line (HL) passing through the center (C) of the damper 400 rotated to block the mixing passage 101, and an imaginary vertical line (VL) passing through the center (C) of the damper 400. Based on , a first curved portion 401a is formed on the lower right side, and a second curved portion 401b is formed on the lower left side,
The first curved portion 401a causes the opening/closing rod 301 to enter the opening/closing valve 300 to a predetermined depth by rotating the damper 400,
The circular arc diameter of the second curved portion 401b is formed to be relatively larger than the diameter from the center C of the damper 400 to the arc of the first curved portion 401a, so that the damper 400 When the point P between the first curved portion 401a and the second curved portion 401b reaches the opening and closing rod 301 by rotation, the opening and closing is compared to the first curved portion 401a. A venturi device with a cam-type damper, characterized in that the rod (301) enters relatively deeper into the on-off valve (300). According to clause 6,
The rotating cam 401 of the damper 400 is,
The arc diameter is gradually increased from the designated point A of the first curved portion 401a to the point P between the first curved portion 401a and the second curved portion 401b. The arc diameter between the point A and the point P is relatively smaller than the arc diameter of the point P between the first curved portion 401a and the second curved portion 401b. Venturi device with cam type damper. According to clause 6,
The second curved portion 401b is,
A venturi device with a cam-type damper, characterized in that the arc diameter is formed to be the same as the arc diameter of the point P between the first curved portion (401a) and the second curved portion (401b). According to clause 6,
The rotating cam 401 of the damper 400 is,
Based on an imaginary horizontal line (HL) passing through the center of the damper 400, an extended curved portion 401a-1 extending upward from the first curved portion 401a is further formed on the upper part of the horizontal line. A venturi device equipped with a characteristic cam-type damper. An inner housing (100) that has a hollow shape with the upper and lower sides open, and has a mixing passage (101) inside the mixing passage (101) that receives air and gas simultaneously and mixes the gas and air;
It is installed to surround the outer peripheral surface of the inner housing 100, forming a gas flow path 201 between the inner housing 100 and communicating with the mixing flow path 101 of the inner housing 100 on the outer surface of the inner housing 100. An external housing formed with a large-diameter gas passage 202 that supplies gas into the mixing passage 101 and a small-diameter gas passage 203 that communicates with the gas passage 201 and supplies gas to the gas passage 201. (200);
It is installed in the large diameter gas passage 202 of the outer housing 200, and is exposed to the mixing passage 101 of the inner housing 100 to form an opening and closing rod 301 that is slidably operated. ) to control the amount of gas discharged into the mixing passage 101 through the large diameter gas passage 202 by sliding the valve 300;
It is installed in the mixing passage 101 and rotates to open the mixing passage 101, and presses the opening and closing rod 301 of the opening and closing valve 300 with the rotating cam 401 formed on the bottom thereof, A damper 400 that controls gas and air to be supplied simultaneously into the mixing passage 101;
A servo motor 500 installed on the outer peripheral surface of the external housing 200 and connected to the damper 400 to adjust the rotation angle of the damper 400;
It consists of,
The opening/closing valve 300 is,
It has a hollow tube shape with the front and back open, and forms a gas inlet path (302a) that receives gas from the large diameter gas flow path (202) at the inner rear end, and communicates with the gas inlet path (302a) at the front end. A valve body 302 formed in a multi-stage structure as much as possible and forming a gas discharge path 302b that guides the gas introduced through the gas inlet path 302a to be discharged into the mixing flow path 101;
It is installed between the gas inlet path (302a) and the gas discharge path (302b) of the valve body 302, allows the opening and closing rod 301 to be fastened through the central part, and enters the valve body 302. An airtight packing (303) that opens between the gas inlet path (302a) and the gas discharge path (302b) by being pushed by the opening and closing rod (301);
It is installed to close the rear end of the valve body 302, allows the end of the opening and closing rod 301 to be fastened to the central portion, and is formed in a plurality of rings spaced apart at predetermined intervals around the outer circumference of the central portion, and the gas inlet 302a ) a rod guide (304) forming a gas distribution hole (304a) that allows gas to be distributed and supplied to;
An elastic spring 305 installed between the sealed packing 303 and the rod guide 304 to press the sealed packing 303 in the direction of the gas discharge path 302b;
A venturi device with a cam type damper, characterized in that it consists of. According to clause 10,
The sealed packing 303 is,
While pressing the elastic spring 305 in proportion to the entry depth of the opening and closing rod 301 entering the valve body 302, it moves backward in the direction of the gas inlet 302a, thereby opening the gas inlet 302a. ) and the gas discharge path (302b). A venturi device with a cam-type damper, characterized in that adjusting the open area between According to clause 10,
The opening and closing rod 301 is,
On its outer surface, a press-fitting protrusion (301a) is formed that is in close contact with the front of the sealed packing (303) and presses the sealed packing (303) in the direction of the gas inlet path (302a) while entering the valve body (302). , is recessed at the rear end of the press-fitting protrusion (301a) to form a fastening groove (301b) that allows seating and coupling of the sealed packing (303),
The sealed packing 303 is,
A through hole 303a through which the opening and closing rod 301 passes is formed in the center thereof, and a seating protrusion 303b that protrudes along the inner peripheral surface of the through hole 303a and is seated and fixed in the fastening groove 301b is further formed. A venturi device equipped with a cam-type damper, characterized in that it is formed.

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