Search

CN-121977099-A - Combined gas valve with mechanical cutting-off function

CN121977099ACN 121977099 ACN121977099 ACN 121977099ACN-121977099-A

Abstract

The invention discloses a combined gas valve with mechanical cutting-off, which comprises an upper valve body and a lower valve body, wherein a first gas inlet cavity is arranged in the upper valve body, a gas outlet which is sequentially connected with a second gas inlet cavity, a transition cavity, a gas outlet cavity and a gas outlet communicated with the gas outlet cavity is arranged in the lower valve body, the first gas inlet cavity is communicated with the second gas inlet cavity through an upper gas inlet channel and a lower gas inlet channel, a push rod is arranged in the first gas inlet cavity and can do linear motion along the axial direction of the first gas inlet cavity, a check ring and a first sealing ring are arranged on the push rod and are positioned in the first gas inlet cavity, a first sealing surface is arranged between the first gas inlet cavity and the upper gas inlet channel, and when the push rod is far away from the upper valve body, the first sealing ring can realize sealing with the first sealing surface under the action of the check ring, so that the isolation cutting-off of a gas path is realized between the first gas inlet cavity and the upper gas inlet channel, the arrangement of a low-grade gas outlet channel is safe and reliable, and high-low grade combined control can be realized.

Inventors

  • ZHOU YIN
  • WANG YOUBIN

Assignees

  • 宁波丽辰电器有限公司

Dates

Publication Date
20260505
Application Date
20260304

Claims (10)

  1. 1. A combined gas valve with mechanical cut-off is characterized in that the gas valve comprises The valve comprises an upper valve body (100) and a lower valve body (200), wherein a first air inlet cavity (101) and an air inlet (102) communicated with the first air inlet cavity (101) are arranged in the upper valve body (100), a second air inlet cavity (201), a transition cavity (202) and an air outlet cavity (203) which are communicated sequentially and an air outlet (204) communicated with the air outlet cavity (203) are arranged in the lower valve body (200), an upper air inlet channel (103) is arranged on the upper valve body (100), and a lower air inlet channel (205) communicated with the upper air inlet channel (103) is arranged on the lower valve body (200) so as to communicate the first air inlet cavity (101) with the second air inlet cavity (201); The air inlet device comprises a first air inlet cavity (101) and an air outlet cavity (203), a push rod (400) which can be axially and movably arranged in the first air inlet cavity (101) and the air outlet cavity (203), a check ring (401) is fixedly arranged on the push rod (400), the check ring (401) is positioned in the first air inlet cavity (101), a first sealing surface (104) is arranged between the first air inlet cavity (101) and an upper air inlet channel (103), and a first sealing ring (402) is sleeved on the push rod (400) and positioned between the check ring (401) and the first sealing surface (104); The middle sealing body (500) is arranged between the upper valve body (100) and the lower valve body (200) and is in sealing connection with the upper valve body and the lower valve body, and a second sealing ring (501) in interference fit with the push rod (400) is embedded on the middle sealing body (500); The electromagnetic valve (600) is arranged at one end of the lower valve body (200) and comprises a valve core (601) capable of axially moving and a sealing block (602) arranged at the end part of the valve core (601), and the sealing block (602) is used for switching on and off the second air inlet cavity (201) and the transition cavity (202).
  2. 2. The combination gas valve with mechanical shut-off according to claim 1, characterized in that the first gas inlet chamber (101), the gas outlet chamber (203), the transition chamber (202) and the second gas inlet chamber (201) are arranged coaxially.
  3. 3. The combination gas valve with mechanical cutoff according to claim 1, wherein the upper gas intake passage (103) is L-shaped, extends forward or backward to the outside of the upper valve body (100) along the L-shaped gas intake direction of the upper gas intake passage (103) and forms a first process hole (105), and a first plug (700) is fitted in the first process hole (105).
  4. 4. The combined gas valve with mechanical cutoff according to claim 1, wherein the transition cavity (202) is located between the second gas inlet cavity (201) and the gas outlet cavity (203), the second gas inlet cavity (201), the transition cavity (202) and the gas outlet cavity (203) are mutually communicated, the lower valve body (200) is further provided with a long-open-fire gas outlet (206) communicated with the transition cavity (202), and a third sealing ring (207) capable of being matched and sealed with the push rod (400) is arranged in the lower valve body (200).
  5. 5. The combined gas valve with mechanical cutoff according to claim 1, characterized in that a fourth sealing ring (106) and a pressing piece (107) are arranged on one end of the upper valve body (100) far away from the first gas inlet cavity (101), and the pressing piece (107) fixes the fourth sealing ring (106) on the upper valve body (100); The first reset spring (403) is sleeved on the push rod (400) and is positioned between the pressing piece (107) and the tail part (404) of the push rod, the tail part (404) of the push rod is one end of the push rod far away from the upper valve body (100), and the first reset spring (403) can give the push rod (400) a trend of always moving towards the direction far away from the first air inlet cavity (101).
  6. 6. The combined gas valve with mechanical cutting off according to claim 5, wherein the head part (405) of the push rod is provided with an inclined surface (406), the tail part (404) of the push rod is of a circular shaft structure, and a notch (407) is arranged at one end of the tail part (404) of the push rod, which is close to the pressing piece (107).
  7. 7. The combined gas valve with mechanical cutoff according to claim 1, wherein a low-grade gas passage (208) capable of communicating the transition cavity (202) and the gas outlet (204) is arranged in the lower valve body (200), a low-grade adjusting rod (800) is movably arranged in the low-grade gas passage (208), a circulation gap (900) is formed between the low-grade adjusting rod (800) and the inner wall of the low-grade gas passage (208), and the size of the circulation gap (900) can be changed by adjusting the position of the low-grade adjusting rod (800).
  8. 8. The combination gas valve with mechanical cutoff, as recited in claim 7, wherein the low-stage gas path passage (208) includes a low-stage gas inlet passage (208 a) communicating with the transition chamber (202), and a low-stage gas outlet passage (208 b) communicating with the gas outlet (204), one of the low-stage gas inlet passage (208 a) and the low-stage gas outlet passage (208 b) intersecting, extending in an axial direction, forming a low-stage adjustment port (209), the low-stage adjustment rod (800) being axially movably disposed within the low-stage adjustment port (209), an end of which is extendable into a corresponding passage to form the flow gap (900).
  9. 9. The combination gas valve with mechanical cutoff according to claim 8, wherein the low-stage adjustment rod (800) includes a first shaft portion (801) and a second shaft portion (802) that are sequentially connected in an axial direction of the low-stage adjustment port (209), an axial diameter of the first shaft portion (801) is smaller than an axial diameter of the second shaft portion (802), a transition shaft portion (803) is formed between the first shaft portion (801) and the second shaft portion (802), the circulation gap (900) is formed between the transition shaft portion (803) and an inner wall of the low-stage gas passage (208), and an outer surface of the transition shaft portion (803) is a transition curved surface that connects the outer surfaces of the first shaft portion (801) and the second shaft portion (802), and a size of the circulation gap (900) changes as the low-stage adjustment rod (800) moves in the axial direction.
  10. 10. The combination gas valve with mechanical shut-off according to claim 1, characterized in that a second return spring (603) is arranged between the valve element (601) and the sealing block (602), said second return spring (603) being able to give the valve element (601) a tendency to move always in a direction towards the transition chamber (202).

Description

Combined gas valve with mechanical cutting-off function Technical Field The invention relates to the technical field of gas valves, in particular to a combined gas valve with mechanical cutting-off function. Background The gas fireplace is used as heating equipment using clean energy, and can provide enough heating effect, real flame for appreciation, so that the gas fireplace is favored by consumers. As a decorative gas appliance, a gas fireplace generally needs to use a valve to control the supply and the on-off of gas, and in order to install and arrange the gas fireplace, a straight push valve which is pushed linearly in an axial direction is adopted in many cases. However, many of the current direct-push valves on the market are capable of controlling the solenoid valves on the direct-push valves to cut off the gas path through an external circuit, and the current direct-push valves cannot cut off the gas path, such as a gas valve mentioned in patent number CN201520987032.5, and the solenoid valves are powered by an external circuit system or mechanism to keep a suction state when the tail of the gas valve is operated, and when the product is required to be cut off by the gas path, the solenoid valves cannot keep the suction state after the external circuit system or mechanism cuts off the power supply, so that the valve is closed, and the gas path of the valve is cut off. The mode is complex in structure, high in cost and not beneficial to market popularization, and is not quite reliable, and due to the fact that the failure probability of the electrical parts exists and the adhesion condition of the electrical parts is not the case, the valve cannot be effectively cut off in time, the use is affected, and even potential safety hazards can be generated. Disclosure of Invention First, the technical problem to be solved The invention aims to solve the technical problems of providing a combined gas valve with mechanical cutting off, wherein the first sealing ring can be selectively attached to or detached from the first sealing surface through axial movement of the push rod to realize mechanical cutting off of a gas circuit, the electromagnetic valve can be selectively attracted or disconnected through external power supply to realize automatic cutting off of the gas circuit, the electromagnetic valve can be used for realizing automatic cutting off of the gas circuit, the first sealing ring can be far away from the first sealing surface or is attached to the first sealing surface through the first sealing ring to realize mechanical cutting off of the gas circuit, the combined control is realized, the mechanical cutting off of a mechanical structure and the electrical cutting off of the electromagnetic valve are realized, the double cutting off of the valve is ensured, the combined gas valve is safe and reliable, a low-gear gas circuit channel is also provided, and the combined control of high-gear and low-gear is realized. (II) technical scheme The invention solves the technical problems by adopting a scheme that a combined gas valve with mechanical cutting off function comprises: The valve body is divided into an upper valve body and a lower valve body, and the upper valve body and the lower valve body are sealed through a sealing gasket to jointly form the valve body; the upper valve body is internally provided with a first air inlet cavity, and the lower valve body is internally provided with a second air inlet cavity, a transition cavity and an air outlet cavity which are sequentially connected; the first air inlet cavity, the air outlet cavity, the transition cavity and the second air inlet cavity are coaxially arranged, the upper valve body comprises an air inlet communicated with the first air inlet cavity, and the lower valve body comprises an air outlet communicated with the air outlet cavity; the upper valve body and the lower valve body are respectively provided with an upper air inlet channel and a lower air inlet channel, and the first air inlet cavity and the second air inlet cavity are communicated; The push rod is arranged in the first air inlet cavity and the air outlet cavity and can do linear motion along the axial direction of the first air inlet cavity and the air outlet cavity; The air-way sealing device comprises a push rod, a first air inlet cavity, an upper air inlet channel, a first sealing ring, a second sealing ring, a first sealing ring and a second sealing ring, wherein the push rod is provided with the check ring, the check ring is fixedly connected with the push rod, the check ring is positioned in the first air inlet cavity, the first sealing ring is arranged between the first air inlet cavity and the upper air inlet channel, and the first sealing ring is positioned between the check ring and the first sealing surface; The middle sealing body is arranged between the upper valve body and the lower valve body, the middle sealing body, the upper valve body and the lower valv