A plug-type gas valve with over-temperature protection

Abstract

A plug-type gas valve with over-temperature protection includes a valve cover, a valve body, an ignition device arranged on the valve cover, a valve stem, a valve core, a pressure spring, a positioning plate and a driving plate, wherein a guide hole is arranged on the partition between the driving sleeve and the inlet and outlet air cavity, and an inner valve core seat is arranged at the outlet end of the inlet and outlet air cavity; it also includes a high-temperature softened cushion block, an inner valve stem, an inner valve core, an inner pressure spring and a spring seat, wherein the plug-in column of the cushion block is inserted into the plug-in hole, the cushion block is located between the arc-shaped plug-in plates, the spring seat at one end of the inner pressure spring cooperates with the partition in the driving sleeve, the inner valve stem passes through the inner valve core seat, the inlet and outlet air cavity, the guide hole and the pressure spring, and a retaining spring is engaged with the retaining groove; under normal conditions, the inner valve core is separated from the inner valve core seat; when the high-temperature cushion block becomes soft, the inner valve core fits with the inner valve core seat. Due to the use of such a structure, when the ambient temperature of the gas valve exceeds the set temperature, the cushion block softens, and under the action of the inner pressure spring, the inner valve core fits with the inner valve core to cut off the gas source, and the combustion device is cut off and extinguished.

Description

Technical Field

[0001] The invention relates to a gas valve, in particular to a plug valve. Background Art

[0002] The existing technology at present is a plug-type gas valve, including a valve cover, a valve body, an ignition device arranged on the valve cover, a valve stem, a valve core, a pressure spring, a positioning plate and a driving plate. The valve body includes a valve core cavity, an air inlet interface and an air outlet pipe connected to one end of the valve core cavity; a circular disk is provided on the valve stem, and two arc-shaped plug-in plates on a diameter line are provided on the circular disk; the valve core includes a driving sleeve with a slot, an inlet and outlet air cavity and a radial hole group connected to the inlet and outlet air cavity; the driving plate is arranged on the driving sleeve, the positioning plate is arranged on the arc-shaped plug-in plate, and the pressure spring cooperates with the driving plate and the positioning plate. When in use, the valve stem is pressed, the positioning plate is separated from the positioning groove of the valve cover, and then rotated, the valve stem drives the valve core to rotate, and the gas is ejected from the inlet interface, the inlet and outlet air cavity, and the air outlet pipe; there is a problem: when the external temperature exceeds the set temperature or exceeds the temperature set by the gas valve, the gas source cannot be cut off. Summary of the invention

[0003] The purpose of the present invention is to provide a plug-type gas valve with over-temperature protection, which has the characteristics of automatically cutting off the gas source at high temperature and automatically recovering at low temperature.

[0004] The present invention is implemented as follows: a plug-type gas valve with over-temperature protection comprises a valve cover, a valve body, an ignition device arranged on the valve cover, a valve stem, a valve core, a pressure spring, a positioning plate and a driving plate, the valve body comprises a valve core cavity, an air inlet interface and an air outlet pipe connected with one end of the valve core cavity; a circular disk is arranged on the valve stem, and two arc-shaped plug-in plates on a diameter line are arranged on the circular disk; the valve core comprises a driving sleeve with a card slot, an inlet and outlet air cavity and a radial hole group connected with the inlet and outlet air cavity; the driving plate is arranged on the driving sleeve, the positioning plate is arranged on the arc-shaped plug-in plate, and the pressure spring cooperates with the driving plate and the positioning plate; the special feature thereof is that a guide hole is arranged on a partition plate between the driving sleeve and the inlet and outlet air cavity, and an inner valve core seat is arranged at the outlet end of the inlet and outlet air cavity;

[0005] One end of the valve stem having the arc-shaped plug-in hole is provided with a plug-in hole;

[0006] It also includes a high temperature softened pad, an inner valve stem, an inner valve core, an inner pressure spring and a spring seat.

[0007] The cushion block is waist-shaped, with a plug-in column at one end; the inner valve stem is provided with an inner valve core seat and a card slot;

[0008] The plug-in column of the cushion block is inserted into the plug-in hole on the valve stem, the cushion block is located between the arc-shaped plug plates, the spring seats are arranged at both ends of the internal pressure spring, the spring seat at one end of the internal pressure spring is arranged in the countersunk hole, the internal valve stem passes through the internal valve core seat, the inlet and outlet air cavity, the guide hole and the pressure spring, and a clamping spring is engaged with the clamping groove;

[0009] Under normal conditions, the inner valve core is separated from the inner valve core seat; when the high-temperature gasket becomes soft, the inner valve core fits the inner valve core seat.

[0010] The above-mentioned plug-type gas valve with over-temperature protection is special in that the cushion block is made of plastic material or eucommia gum.

[0011] The invention discloses a plug-type gas valve with over-temperature protection. Due to the structure, when the ambient temperature of the gas valve exceeds the set temperature, the cushion block softens, and under the action of the internal pressure spring, the inner valve core fits with the inner valve core to cut off the gas source, and the combustion device is shut off. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the present invention.

[0013] Figure 2 yes Figure 1 A-A view of.

[0014] Figure 3 It is one of the three-dimensional exploded views of the present invention.

[0015] Figure 4 It is a perspective view of the present invention.

[0016] Figure 5 It is the second of the three-dimensional exploded diagrams of the present invention.

[0017] Figure 6 It is a three-dimensional view of the valve cover of the present invention.

[0018] Figure 7 It is three-dimensional exploded diagram of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1As shown, a plug-type gas valve with over-temperature protection comprises a valve cover 1, a valve body 2, an ignition device 1A arranged on the valve cover, a valve stem 3, a valve core 4, a pressure spring 5, a positioning plate 6 and a driving plate 7. The valve cover 1 is provided with a valve stem channel 1B, a positioning groove 1C and a guide groove 1D. The valve body 2 comprises a valve core cavity 21, an air inlet interface 22 and an air outlet pipe 23 connected to one end of the valve core cavity; a circular disk 31 is provided on the valve stem 3, and two arc-shaped plug-in plates 32 on a diameter line are provided on the circular disk; the valve The core 4 includes a driving sleeve 41 with a slot, an inlet and outlet air cavity 42 and a radial hole group communicating with the inlet and outlet air cavity; the driving plate 7 is arranged on the driving sleeve 41, the positioning plate 6 is arranged on the arc-shaped plug-in plate 32, and the pressure spring 5 cooperates with the driving plate 7 and the positioning plate 6; the positioning protrusion of the positioning plate 6 is engaged with the positioning groove 1C of the valve cover 1, and the guide groove 1D is slidably matched; the valve stem 3 is pressed, and the positioning protrusion 61 leaves the positioning groove 1C and slides in the guide groove 1D; the valve stem rotates, and the driving plate 7 drives the ignition device 1A;

[0021] A guide hole 44 is provided on the partition between the driving sleeve 41 and the inlet and outlet air cavity 42, and an inner valve core seat 45 is provided at the outlet end of the inlet and outlet air cavity;

[0022] The valve stem 3 has an arc-shaped plug-in hole 32 at one end thereof, and a plug-in hole 33;

[0023] It also includes a high temperature softened cushion block 8, an inner valve stem 9, an inner valve core 10, an inner pressure spring 11 and a spring seat 12.

[0024] The cushion block 8 is waist-shaped, and a plug-in column 81 is provided at one end; an inner valve core seat and a clamping groove 91 are provided on the inner valve stem 9;

[0025] The plug-in column 81 of the cushion block 8 is inserted into the plug-in hole 33 on the valve stem, and the cushion block 8 is located in the space between the arc-shaped plug plates 32. The spring seats 12 are arranged at both ends of the inner pressure spring 11. The spring seat 12 at one end of the inner pressure spring 11 cooperates with the partition in the driving sleeve 41. The inner valve stem 9 passes through the inner valve core seat 45, the inlet and outlet air cavity 42, the guide hole 44 and the pressure spring 5. A retaining spring 13 is engaged with the retaining groove 91.

[0026] Under normal conditions, the inner valve core 10 is separated from the inner valve core seat 45; when the high-temperature cushion block 8 becomes soft, the inner valve core 10 fits against the inner valve core seat 45, cutting off the gas path supplying gas to the burner.

[0027] The cushion block 8 is made of plastic material or eucommia gum.

[0028] like Figure 1 As shown, in Figure 1The state shown is the normal state, i.e. the working state. When the ambient temperature is higher than the set temperature, the cushion block 8 softens, and under the action of the internal pressure spring 11, the internal valve stem 9 moves to the right, the internal valve core 10 fits with the internal valve core seat 45, and the gas in the inlet and outlet air cavity 42 of the valve core 4 cannot enter the outlet pipe 23, so the combustion device stops burning because there is no gas entering;

[0029] When the ambient temperature is lower than the set temperature, the cushion block 8 automatically returns to its original state.

[0030] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, which are also considered as the protection scope of the present invention.

Claims

1. A plug-type gas valve with over-temperature protection, comprising a valve cover, a valve body, an ignition device arranged on the valve cover, a valve stem, a valve core, a pressure spring, a positioning plate and a driving plate, wherein the valve body comprises a valve core cavity, an air inlet interface and an air outlet pipe connected to one end of the valve core cavity; a circular disk is arranged on the valve stem, and two arc-shaped plug-in plates on a diameter line are arranged on the circular disk; the valve core comprises a driving sleeve with a card slot, an inlet and outlet air cavity and a radial hole group communicating with the inlet and outlet air cavity; the driving plate is arranged on the driving sleeve, the positioning plate is arranged on the arc-shaped plug-in plate, and the pressure spring cooperates with the driving plate and the positioning plate; Features: A guide hole is provided on the partition between the driving sleeve and the inlet and outlet air cavity, and an inner valve core seat is provided at the outlet end of the inlet and outlet air cavity; The valve stem is provided with a plug-in hole at one end of the arc-shaped plug-in plate; It also includes a high temperature softened pad, an inner valve stem, an inner valve core, an inner pressure spring and a spring seat. The cushion block is waist-shaped, with a plug-in column at one end; a slot is provided on the inner valve stem; The plug-in column of the cushion block is inserted into the plug-in hole on the valve stem, the cushion block is located between the arc-shaped plug-in plates, the spring seats are arranged at both ends of the internal pressure spring, the spring seat at one end of the internal pressure spring cooperates with the partition in the driving sleeve, the internal valve stem passes through the internal valve core seat, the inlet and outlet air cavity, the guide hole and the internal pressure spring, a retaining spring is engaged with the retaining groove and fits with a spring seat; Under normal conditions, the inner valve core is separated from the inner valve core seat; when the high-temperature gasket becomes soft, the inner valve core fits the inner valve core seat.

2. A plug-type gas valve with over-temperature protection according to claim 1, Features: The cushion block is made of plastic material or eucommia gum.

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