Gas valve for cartridge burners

Abstract

The application discloses a gas valve for a gas stove, which comprises a pressure stabilizing cavity of a valve body, a gas outlet channel and a gas outlet end communicated with the pressure stabilizing cavity, a communicating cavity and a switch assembly arranged between the gas outlet channel and the gas outlet end, a sealing gasket, a knob, a second spring and a fixing cover, the fixing cover limits the sealing gasket, the knob and the second spring in the communicating cavity, the sealing gasket is provided with a first through hole communicated with the gas outlet channel and a second through hole communicated with the gas outlet end, the knob is provided with a rotating rod, the outer end of the rotating rod extends out of the fixing cover, the second spring is sleeved on the rotating rod, the outer end of the second spring abuts against the fixing cover, the inner end of the second spring abuts against the knob, the elastic force of the second spring makes the inner end surface of the knob abut against the sealing gasket, the inner end surface of the knob is provided with a communicating guide groove, the outer circumferential surface of the knob is sealingly connected with the communicating cavity, the knob is rotated, when the first through hole and the second through hole are both communicated with the communicating guide groove, the gas outlet channel and the gas outlet end are communicated. The gas valve has simple and reasonable structure and low manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cassette stove, in particular to a gas valve for cassette stove. BACKGROUND

[0002] At present, the gas valve of the cassette stove needs to be connected with the gas cylinder at the gas inlet end, so that the gas in the gas cylinder flows into the gas valve. After the gas cylinder is pulled out, the gas inlet end needs to be sealed by itself to avoid leakage of the gas in the valve body from the gas inlet end. The pressure relief valve with overpressure double protection disclosed in CN207034293U needs to be switched by the taper surface cooperation, which has high assembly precision requirement, high manufacturing cost and limits the size of the valve body. The gas inlet end needs to be triple sealed to meet the safety requirement, which results in a large number of parts, a large valve body size, complex installation and high cost.

[0003] Moreover, the valve body is cast into shape, and the supporting legs are also cast on the valve body. The valve body is installed in the cassette stove through the supporting legs. However, the supporting legs limit the casting process of the valve body, slow down the production speed and reduce the production efficiency. SUMMARY

[0004] The purpose of the present application is to provide a gas valve for cassette stove with a small size.

[0005] The purpose of the present application is achieved as follows.

[0006] The gas valve for cassette stove comprises a valve body, a pressure stabilizing chamber and a gas outlet channel connected with the pressure stabilizing chamber are arranged on the valve body, a gas outlet end is arranged on the valve body, a switch assembly is arranged between the gas outlet channel and the gas outlet end, a communication chamber is arranged between the valve body corresponding to the gas outlet channel and the gas outlet end, the switch assembly comprises a sealing gasket, a knob, a second spring and a fixing cover, the fixing cover limits the sealing gasket, the knob and the second spring in the communication chamber, the sealing gasket is provided with a first through hole and a second through hole, the first through hole is connected with the gas outlet channel, the second through hole is connected with the gas outlet end, the knob is provided with a rotating rod, the outer end of the rotating rod extends out of the fixing cover, the second spring is sleeved on the rotating rod, the outer end of the second spring abuts against the fixing cover, the inner end of the second spring abuts against the knob, the elastic force of the second spring makes the inner end surface of the knob abut against the sealing gasket, the inner end surface of the knob is provided with a communication guide groove, the outer peripheral surface of the knob is sealingly connected with the communication chamber,

[0007] The rotating rod drives the knob to rotate, and when the first through hole and the second through hole are both connected with the communication guide groove, the gas outlet channel and the gas outlet end are connected.

[0008] The switch assembly of the present application has a simple structure, the sealing gasket and the knob are connected through the communication guide groove, the installation space is reduced, and the size of the valve body can be further reduced. Moreover, the structure is reasonable, and the manufacturing cost is low.

[0009] The above technical solution can be further improved as follows.

[0010] More specifically, the communication guide groove is provided with a guide portion at one end. When the communication guide groove communicates with the first through hole or the second through hole through the guide portion, the rotation knob adjusts the flow rate of the gas flowing through the communication guide groove by the overlapping area of the guide portion and the first through hole or the second through hole. The guide portion is designed to conveniently control the gas flow rate, thereby adjusting the size of the gas stove fire.

[0011] More specifically, the guide portion is an arc-shaped groove, and the groove bottom of the arc-shaped groove is inclinedly arranged from the inner end surface of the rotation knob to the groove bottom of the communication guide groove. The overlapping or misalignment process of the communication guide groove and the first through hole or the second through hole has a buffer, which is safer to use.

[0012] More specifically, the communication guide groove is in a U shape or an S shape or a straight line shape. The communication guide groove is easy to manufacture and has low requirements.

[0013] More specifically, the valve body is provided with a mounting cavity and a detachable support at the bottom. The detachable support seals and installs one end of the gas outlet copper pipe in the mounting cavity. The second through hole and one end of the gas outlet copper pipe are communicated through the mounting cavity, and the mounting cavity and the gas outlet copper pipe constitute the gas outlet end. The valve body is easy to cast, which can improve the production efficiency. The support facilitates the installation of the valve body in the gas stove.

[0014] More specifically, the inner end surface of the sealing gasket is provided with a first protrusion and a second protrusion. The first through hole penetrates the first protrusion, and the second through hole penetrates the second protrusion. The communication cavity is provided with a first positioning channel communicated with the gas outlet channel, and the first protrusion is inserted into the first positioning channel. The communication cavity is provided with a second positioning channel communicated with the gas outlet copper pipe, and the second protrusion is inserted into the second positioning channel. The sealing gasket is not easy to move, the gas inlet and outlet are smooth, and the positioning assembly is convenient.

[0015] More specifically, the outer peripheral surface of the rotation knob is provided with a groove, and the groove is provided with a third sealing ring. The third sealing ring and the communication cavity abut and seal. The third sealing ring avoids gas leakage at the switch assembly of the valve body, which is safe to use.

[0016] More specifically, the gas inlet end of the gas inlet channel is provided with a first spring, a valve core, a valve seat, a valve cover, a first sealing ring and a second sealing ring. The valve cover and the valve body are fixedly connected. The valve cover presses the valve seat at the gas inlet end through the first sealing ring. The first spring, the valve core and the second sealing ring are arranged in the gas inlet end. The valve seat limits the position of the second sealing ring. The elastic force of the first spring makes the valve core abut against the second sealing ring. The outer end of the valve core extends into the second sealing ring, and the valve core seals the gas inlet end.

[0017] The valve seat and the valve cover are provided with a gas inlet connected to the gas cylinder. When the gas cylinder is inserted into the gas inlet, the gas cylinder pushes the valve core to move inward and compresses the first spring. The valve core is separated from the second sealing ring. The outer end of the valve core pushes open the switch valve of the gas cylinder. The gas in the gas cylinder enters the pressure stabilizing cavity through the gas inlet end and the gas inlet channel. The gas inlet end has fewer installation parts and is easy to install. Only two sealing rings are needed to meet the safe use requirements.

[0018] More specifically, the valve core comprises an inner end section, a middle section and an outer end section, a second step is formed between the inner end section and the middle section, the first spring is sleeved on the inner end section and abuts against the middle section, the outer end section has a diameter smaller than the inner diameter of the second sealing ring, the outer end section constitutes the outer end of the valve core, the middle section near the outer end section is formed with a sealing part, the middle section near the outer end section is formed with a limiting part, the limiting part has a diameter larger than the inner diameter of the second sealing ring, the elastic force of the first spring makes the sealing part of the middle section abut against the second sealing ring, and the outer end section is inserted into the second sealing ring. The valve core is reasonably designed and meets the needs of sealing or conducting gas.

[0019] More specifically, the top cavity of the valve body is sealingly connected with an upper cover, the upper cover and the cavity form the pressure stabilizing chamber, the pressure stabilizing device is arranged in the pressure stabilizing chamber, the upper cover is formed by stamping, and a connecting bracket is formed on one side of the upper cover. The valve body is easy to cast, and the production efficiency can be improved. The bracket facilitates the installation of the valve body in the cassette stove.

[0020] The present application has the following beneficial effects.

[0021] (1) The switch assembly of the present application has a simple structure, the sealing gasket and the knob are connected through the communication guide groove, the installation space is reduced, thereby the volume of the valve body can be reduced, and the structure is reasonable and the manufacturing cost is low.

[0022] (2) The guide part is designed to facilitate the control of the gas flow, thereby adjusting the size of the cassette stove fire. The overlapping or staggering process of the communication guide groove and the first through hole or the second through hole has a buffer, which is safer to use. The communication guide groove is easy to manufacture and has low precision requirements. The sealing gasket positioning assembly structure is simple and easy to implement. The sealing gasket is not easy to move, the gas in and out is smooth, and the assembly is convenient.

[0023] (3) The number of installation parts at the gas inlet end is small, and the installation is easy. Only two sealing rings are needed to meet the safety requirements, and the purpose of reducing the volume of the valve body can also be achieved. The valve core is reasonably designed to meet the needs of sealing or conducting gas, and the production cost is low.

[0024] (4) The detachable bracket and the connecting bracket of the upper cover are designed to reduce the difficulty of valve body casting process and improve the production efficiency of valve body casting. The bracket and the connecting bracket together install the valve body in the cassette stove. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the first embodiment.

[0026] Figure 2 It is a sectional structure schematic diagram of the first embodiment.

[0027] Figure 3 It is an exploded structure schematic diagram of the first embodiment.

[0028] Figure 4 It is a structure schematic diagram of the knob in the first embodiment.

[0029] Figure 5 The structure diagram of the outlet passage direction of the valve body in Example 1.

[0030] Figure 6 The structure diagram of the inlet passage direction of the valve body in Example 1.

[0031] Figure 7 The structure diagram of the valve core in Example 1. DETAILED DESCRIPTION

[0032] The application will be further described in conjunction with the drawings and examples.

[0033] Example 1, referring to Figures 1-7 As shown in the drawings, a gas valve for a gas stove comprises a valve body 1, which is provided with a pressure stabilizing chamber 13, an inlet passage 11 and an outlet passage 14 communicating with the pressure stabilizing chamber 13.

[0034] The inlet end 2 of the inlet passage 11 is provided with a first spring 21, a valve core 3, a valve seat 22, a valve cover 23, a first sealing ring 24 and a second sealing ring 25. A first step 26 is formed between the inlet passage 11 and the inlet end 2, and a third step 27 is formed near the end face of the inlet end 2. The first spring 21, the valve core 3 and the second sealing ring 25 are arranged in the inlet end 2. The second sealing ring 25 is arranged in the third step 27, the valve seat 22 abuts against the end face of the inlet end 2, and the inlet end 2 and the valve seat 22 are sealed by the second sealing ring 25. The valve cover 23 is sleeved on the inlet end 2, and the valve cover 23 and the inlet end 2 are riveted and fixed, the valve seat 22 and the first sealing ring 24 are arranged in the valve cover 23, and the valve seat 22 and the valve cover 23 are sealed by the first sealing ring 24.

[0035] The valve core 3 comprises an inner end section 31, a middle section 32 and an outer end section 33, a second step 34 is formed between the inner end section 31 and the middle section 32, the outer end section 33 has a diameter smaller than the inner diameter of the second sealing ring 25, the outer end section 33 constitutes the outer end of the valve core 3, the middle section 32 is formed with a sealing part 35 near the outer end section 33, the middle section 32 is formed with a limiting part 37 near the outer end section 33, the sealing part 35 and the limiting part 37 are connected by an arc surface part 36, and the limiting part 37 has a diameter larger than the inner diameter of the second sealing ring 25. The inner end of the first spring 21 abuts against the first step 26, and the outer end of the first spring 21 is sleeved on the inner end section 31 and abuts against the middle section 32. The elastic force of the first spring 21 makes the peripheral surface of the sealing part 35 of the middle section 32 abut against the second sealing ring 25, and the arc surface part 36 also abuts against the second sealing ring 25, that is, the valve core 3 seals the inlet end 2, and the second sealing ring 25 blocks the limiting part 37 through the arc surface part 36, so as to avoid the valve core 3 from separating from the inlet end 2. The outer end section 33 is inserted into the second sealing ring 25.

[0036] Valve seat 22 and valve cover 23 are provided with the gas inlet 20 connected to the gas cylinder (not shown in the figure), when the gas cylinder is inserted into the gas inlet 20, the gas cylinder pushes the valve core 3 to move inward and compresses the first spring 21, the valve core 3 is separated from the second sealing ring 25, at the same time, the outer end of the valve core 3 opens the switch valve of the gas cylinder, and the gas in the gas cylinder enters the stable pressure chamber 13 through the gas inlet end 2 and the gas inlet channel 11.

[0037] The bottom of the valve seat 22 is fixedly connected with the gas outlet copper pipe 51, and the valve body 1 is provided with the communication chamber 15 and the switch assembly 4 corresponding to the gas outlet channel 14 and the gas outlet copper pipe 51. The communication chamber 15 is provided with the first positioning channel 16 communicated with the gas outlet channel 14, and the communication chamber 15 is provided with the second positioning channel 17 communicated with the gas outlet copper pipe 51.

[0038] The switch assembly 4 includes the sealing gasket 6, the knob 7, the second spring 41 and the fixed cover 42. The fixed cover 42 is riveted with the valve body 1, and the fixed cover 42 limits the sealing gasket 6, the knob 7 and the second spring 41 in the communication chamber 15. The sealing gasket 6 is provided with the first through hole 61 and the second through hole 62, and the inner end surface of the sealing gasket 6 is provided with the first convex part 63 and the second convex part 64. The first through hole 61 penetrates the first convex part 63, the second through hole 62 penetrates the second convex part 64, the first convex part 63 is inserted into the first positioning channel 16, and the second convex part 64 is inserted into the second positioning channel 17 (i.e. the sealing gasket 6 and the communication chamber 15 are positioned and connected), the first through hole 61 is communicated with the gas outlet channel 14, and the second through hole 62 is communicated with the gas outlet copper pipe 51.

[0039] The inner end surface of the knob 7 is provided with a communication guide groove 70. One end of the communication guide groove 70 is provided with a guide part 71. When the communication guide groove 70 is communicated with the first through hole 61 or the second through hole 62 through the guide part 71, the knob 7 adjusts the flow through the communication guide groove 70 by the coincident area of the guide part 71 and the first through hole 61 or the second through hole 62. Preferably, the guide part 71 is an arc-shaped groove, and the groove bottom of the arc-shaped groove is obliquely arranged from the inner end surface of the knob 7 to the groove bottom of the communication guide groove 70. The communication guide groove 70 is in U-shaped, S-shaped, or other special-shaped. The outer circumferential surface of the knob 7 is provided with an annular groove 72, and the annular groove 72 is provided with a third sealing ring 73. The third sealing ring 73 is in abutting sealing with the communication chamber 15. The outer end surface of the knob 7 is provided with a rotating rod 74, and the outer end of the rotating rod 74 extends out of the fixed cover 42. The second spring 41 is sleeved on the rotating rod 74, the outer end of the second spring 41 is in abutting with the fixed cover 42, the inner end of the second spring 41 is in abutting with the outer end surface of the knob 7, and the elastic force of the second spring 41 makes the inner end surface of the knob 7 in abutting sealing with the sealing gasket 6. The rotating rod 74 drives the knob 7 to rotate, and when the first through hole 61 and the second through hole 62 are both communicated with the communication guide groove 70, the gas outlet channel 14 and the gas outlet copper pipe 51 are communicated.

[0040] In the application, the valve body 1 is cast into shape, the upper cover 8 is sealingly connected to the top cavity of the valve body 1, the upper cover 8 and the cavity form the pressure stabilizing chamber 13, the pressure stabilizing device 19 is arranged in the pressure stabilizing chamber 13, the upper cover 8 is stamped into shape, and a connecting frame 81 is formed on one side of the upper cover 8. The bottom of the valve body 1 is provided with a mounting cavity 18 and a detachable support 5, one end of the air outlet copper pipe 51 is sealingly mounted in the mounting cavity 18 through the detachable support 5, and the second through hole 62 is in communication with the mounting cavity 18. The valve body 1 is mounted in the cassette stove through the support 5 and the connecting frame 81.

[0041] The bottom of the valve body 1 is provided with a high-pressure protection cavity 12 at the air inlet channel 11, the high-pressure protection cavity 12 is in communication with the air inlet end 2 and the pressure stabilizing chamber 13 through the air inlet channel 11. The high-pressure protection device 9 is arranged in the high-pressure protection cavity 12, the manual switch 52 is arranged on the support 5, and the high-pressure protection device 9 and the manual switch 52 are connected. In the application, the pressure stabilizing device 19 and the high-pressure protection device 9 are both prior art, which will not be described in detail in the application.

Claims

1. A gas valve for a gas stove, comprising a valve body (1), a pressure stabilizing chamber (13) and a gas outlet channel (14) communicating with the pressure stabilizing chamber (13) being provided on the valve body (1), a gas outlet end being provided on the valve body (1), a switch assembly (4) being provided between the gas outlet channel (14) and the gas outlet end, characterized in that, The valve body (1) is provided with a communication cavity (15) between the outlet passage (14) and the outlet end, the switch assembly (4) comprises a sealing gasket (6), a knob (7), a second spring (41) and a fixed cover (42), the fixed cover (42) limits the sealing gasket (6), the knob (7) and the second spring (41) in the communication cavity (15), the sealing gasket (6) is provided with a first through hole (61) and a second through hole (62), the first through hole (61) is communicated with the outlet passage (14), the second through hole (62) is communicated with the outlet end, the knob (7) is provided with a rotating rod (74), the outer end of the rotating rod (74) extends out of the fixed cover (42), the second spring (41) is sleeved on the rotating rod (74), the outer end of the second spring (41) abuts against the fixed cover (42), the inner end of the second spring (41) abuts against the knob (7), the elastic force of the second spring (41) makes the inner end surface of the knob (7) abut against the sealing gasket (6), the inner end surface of the knob (7) is provided with a communication guide groove (70), the outer periphery of the knob (7) is sealingly connected with the communication cavity (15), The rotating rod (74) drives the knob (7) to rotate, when the first through hole (61) and the second through hole (62) are communicated with the communication guide groove (70), the outlet passage (14) and the outlet end are communicated; The communication guide groove (70) is provided with a guide portion (71) at one end, when the communication guide groove (70) is communicated with the first through hole (61) or the second through hole (62) through the guide portion (71), the knob (7) adjusts the flow through the communication guide groove (70) through the coincident area of the knob (7) and the first through hole (61) or the second through hole (62) through the guide portion (71); The valve body (1) is provided with a mounting cavity (18) and a detachable support (5) at the bottom, the detachable support (5) seals and installs one end of the outlet copper pipe (51) in the mounting cavity (18), the second through hole (62) and one end of the outlet copper pipe (51) are communicated through the mounting cavity (18), and the mounting cavity (18) and the outlet copper pipe (51) constitute the outlet end.

2. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The guide portion (71) is a circular arc groove, and the groove bottom of the circular arc groove is inclinedly arranged from the inner end surface of the knob (7) to the groove bottom of the communication guide groove (70).

3. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The communication guide groove (70) is in a U shape, an S shape or a straight line shape.

4. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The inner end surface of the sealing gasket (6) is provided with a first convex portion (63) and a second convex portion (64), the first through hole (61) penetrates the first convex portion (63), the second through hole (62) penetrates the second convex portion (64), the communication cavity (15) is provided with a first positioning passage (16) communicated with the outlet passage (14), the first convex portion (63) is inserted into the first positioning passage (16), and the communication cavity (15) is provided with a second positioning passage (17) communicated with the outlet copper pipe (51), the second convex portion (64) is inserted into the second positioning passage (17).

5. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The outer periphery of the knob (7) is provided with a groove (72), the groove (72) is provided with a third sealing ring (73) therein, and the third sealing ring (73) abuts against and seals the communication cavity (15).

6. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The air inlet end (2) of the air inlet channel (11) is provided with a first spring (21), a valve core (3), a valve seat (22), a valve cover (23), a first sealing ring (24) and a second sealing ring (25), the valve cover (23) is fixedly connected with the valve body (1), the valve cover (23) presses the valve seat (22) at the air inlet end (2) through the first sealing ring (24), the first spring (21), the valve core (3) and the second sealing ring (25) are arranged in the air inlet end (2), the valve seat (22) limits the position of the second sealing ring (25), the valve core (3) is abutted against the second sealing ring (25) by the elastic force of the first spring (21), the outer end of the valve core (3) extends into the second sealing ring (25), the valve core (3) seals the air inlet end (2), The valve seat (22) and the valve cover (23) are provided with an air inlet (20) connected with the gas cylinder, when the gas cylinder is inserted into the air inlet (20), the gas cylinder pushes the valve core (3) to move inward and compresses the first spring (21), the valve core (3) is separated from the second sealing ring (25), the outer end of the valve core (3) pushes open the switch valve of the gas cylinder, the gas in the gas cylinder enters the pressure stabilizing chamber (13) through the air inlet end (2) and the air inlet channel (11).

7. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The valve core (3) comprises an inner end section (31), a middle section (32) and an outer end section (33), a second step (34) is formed between the inner end section (31) and the middle section (32), the outer end of the first spring (21) is sleeved on the inner end section (31) and abuts against the middle section (32), the diameter of the outer end section (33) is smaller than the inner diameter of the second sealing ring (25), the outer end section (33) constitutes the outer end of the valve core (3), the middle section (32) is formed with a sealing part (35) close to the outer end section (33), the middle section (32) is formed with a limiting part (37) close to the outer end section (33), the diameter of the limiting part (37) is greater than the inner diameter of the second sealing ring (25), the sealing part (35) of the middle section (32) abuts against the second sealing ring (25) by the elastic force of the first spring (21), and the outer end section (33) is inserted into the second sealing ring (25).

8. The gas valve for a cartridge-type burner as set forth in claim 1, wherein The top concave cavity of the valve body (1) is sealingly connected with an upper cover (8), the upper cover (8) and the concave cavity surround the pressure stabilizing chamber (13), the pressure stabilizing chamber (13) is provided with a pressure stabilizing device (19), the upper cover (8) is stamping formed, and one side of the upper cover (8) is formed with a connecting frame (81).

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