Gas valve body

Abstract

The gas valve body comprises a valve element cavity formed in the valve body, a gas inlet is formed in the bottom of the valve body, a vertical gas channel connected with the gas inlet is formed in the outer side of the valve body, the vertical gas channel is connected with a transverse gas channel penetrating through the valve element cavity, a first gas rod extending forwards is arranged on the front side of the valve body, and the first gas rod is connected with a second gas rod extending vertically. A first air outlet with a forward opening is formed in the position, close to the top, of the second air rod, the first air outlet is communicated with the valve element cavity through the second air rod and the first air rod, a core pulling concave position is arranged between the cavity wall of the valve element cavity and the outer wall of the valve body, and the transverse air channel and the first air rod both pass through the core pulling concave position. The core-pulling concave position is arranged between the cavity wall of the valve element cavity and the outer wall of the valve body, so that a special core-pulling space is provided for mold design. Therefore, when the valve element cavity is formed in a die-casting mode, the die can be provided with a more reasonable exhaust channel, and the casting defects of air holes, shrinkage porosity and the like formed in the valve element cavity wall due to gas retention are effectively reduced.

Description

Technical Field

[0001] This invention relates to a gas valve body. Background Technology

[0002] Currently, gas valve bodies, as a key control component, are widely used in various gas equipment, and their airtightness directly affects the safety and reliability of the equipment. In the manufacturing process of gas valve bodies, die casting is widely used due to its high production efficiency and good molding precision. However, during the production of traditional die-cast valve bodies, especially in structurally complex areas such as the valve core cavity, casting defects such as porosity and shrinkage often occur due to poor mold venting or unreasonable molten metal flow paths. These defects significantly reduce the airtightness of the valve body, making it prone to gas leakage during use and failing to meet stringent airtightness testing standards.

[0003] Existing gas valve body designs often fail to adequately consider the characteristics of the die-casting process, particularly in the connection area between the valve core cavity and the external gas passage and valve stem. Due to the compact structure and uneven wall thickness, this area is more prone to pore accumulation during die-casting. Although some solutions attempt to improve the porosity problem by optimizing the gating system or adjusting process parameters, these methods typically increase the complexity of the production process and are inconsistent in their effectiveness, failing to fundamentally solve the airtightness problem caused by porosity in the valve core cavity area.

[0004] Therefore, there is an urgent need for a gas valve body structure optimized for the characteristics of the die-casting process, which can effectively improve the exhaust effect in the valve core cavity area, reduce the generation of internal pores, thereby ensuring that the overall airtightness of the valve body meets the requirements, and improving the product qualification rate and safety of use. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems. We provide a gas valve body with a reasonable structural design, which solves the problem of air porosity in die-cast gas valves.

[0006] To achieve the above objectives, the present invention provides a gas valve body, which includes a valve core cavity disposed inside the valve body, an air inlet at the bottom of the valve body, a vertical air passage connected to the air inlet on the outer side of the valve body, a transverse air passage connected to the vertical air passage and extending into the valve core cavity, a first air rod extending forward on the front side of the valve body, the first air rod being connected to a second air rod extending vertically, a first air outlet opening forward near the top of the second air rod, the first air outlet communicating with the valve core cavity through the second air rod and the first air rod, a core-pulling recess being provided between the cavity wall of the valve core cavity and the outer wall of the valve body, and both the transverse air passage and the first air rod passing through the core-pulling recess.

[0007] In one or more embodiments, the valve body has a first horizontal tube extending outward on the left side, the first horizontal tube communicating with the valve core cavity, the first horizontal tube having a third air rod extending forward, and the first horizontal tube forming an angle of 60°-80° with the axis of the valve core cavity, the third air rod having a second air outlet on its front side.

[0008] In one or more embodiments, the valve body has a second horizontal tube extending outward on the right side. The second horizontal tube is horizontally arranged, and the upper end of the second horizontal tube is flush with the upper end face of the valve core cavity. A mounting platform is provided on the front side of the second horizontal tube, and a third air outlet communicating with the second horizontal tube is opened on the front side of the mounting platform.

[0009] In one or more embodiments, the vertical air passage and the horizontal air passage are located in the angle region between the axis of the first air rod and the axis of the second horizontal tube.

[0010] In one or more embodiments, a first fixing hole is provided on the mounting platform.

[0011] In one or more embodiments, a reinforcing rib is provided between the valve body, the first air rod, and the second air rod.

[0012] In one or more embodiments, the valve body has two steps near the upper end, the two steps are evenly distributed around the circumference, and a second fixing hole is provided on the step.

[0013] In one or more embodiments, the outer side of the air inlet is provided with a connecting ear, and the connecting ear has a mounting hole.

[0014] The advantages of this invention compared to the prior art are as follows: By providing a core-pulling recess between the cavity wall of the valve core and the outer wall of the valve body, this invention provides a dedicated core-pulling space for mold design. This allows the mold to be designed with a more reasonable venting channel during die casting of the valve core cavity, greatly improving the venting effect in this area and effectively reducing casting defects such as porosity and shrinkage caused by gas retention inside the valve core cavity wall. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the gas valve body of this application; Figure 2 for Figure 1 A structural diagram from another angle; Figure 3 This is a cross-sectional view of the vertical airway axis of this application. Detailed Implementation

[0016] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0017] See appendix Figure 1-3 This application provides a gas valve body, which includes a valve core cavity 2 disposed inside the valve body 1. The bottom of the valve body 1 is provided with an air inlet 3. The outer side of the valve body 1 is provided with a vertical air passage 4 connected to the air inlet 3. The vertical air passage 4 is connected to a transverse air passage 5 that penetrates to the valve core cavity 2. The front side of the valve body 1 is provided with a forward-extending first air rod 6. The first air rod 6 is connected to a vertically extending second air rod 7. The second air rod 7 is provided with a forward-opening first air outlet 8 near the top. The first air outlet 8 is connected to the valve core cavity 2 through the second air rod 7 and the first air rod 6. A core-pulling recess 9 is provided between the cavity wall of the valve core cavity 2 and the outer wall of the valve body 1. The transverse air passage 5 and the first air rod 6 both pass through the core-pulling recess 9. By providing a core-pulling recess 9 between the cavity wall of the valve core cavity 2 and the outer wall of the valve body 1, an integrated core-pulling space is designed for the mold. This fundamentally optimizes the mold structure and venting path of the valve core cavity 2 area, allowing the molten metal to fill and expel gas more smoothly during the die casting process, greatly reducing porosity and shrinkage defects in the valve core cavity, and directly improving the airtightness qualification rate and safety of the product.

[0018] The valve body 1 has a first horizontal pipe 10 extending outward on the left side, which is connected to the valve core cavity 2. The first horizontal pipe 10 has a third air rod 11 extending forward, and the axis of the first horizontal pipe 10 and the valve core cavity 2 form an angle of 60°-80°. The front side of the third air rod 11 has a second air outlet 12, which can significantly improve the flow state of the molten metal when it flows into the first horizontal pipe 10, reduce turbulence and air entrapment, thereby reducing the risk of casting defects at this connection. The second air outlet 12 enables multiple outputs of gas, meets the needs of complex gas equipment for gas source interfaces in different directions, and enhances the functionality and application range of the valve body.

[0019] The valve body 1 has a second horizontal tube 13 extending outward on the right side. The second horizontal tube 13 is horizontally arranged, and its upper end is flush with the upper end face of the valve core cavity 2, forming a unified reference surface. This not only simplifies the positioning and clamping during machining, but also facilitates the rapid measurement of dimensions and verification of geometric tolerances in subsequent inspections. The front side of the second horizontal tube 13 is provided with a mounting platform 14, and the front side of the mounting platform 14 has a third air outlet 15 that communicates with the second horizontal tube 13.

[0020] The vertical air passage 4 and the horizontal air passage 5 are located in the angled area between the axis of the first air rod 6 and the axis of the second horizontal tube 13. This structure makes full use of the fan-shaped space on the side of the valve body 1, avoids the air passages being randomly distributed in the valve body, and makes the internal structure of the valve body 1 orderly, which is conducive to realizing the miniaturization design of the valve body.

[0021] The mounting platform 14 is provided with a first fixing hole 16, which allows the valve body 1 to be fixed by the mounting platform on the right side. This forms a multi-point support with the fixing method at the upper end of the valve body 1, which greatly enhances the installation rigidity and stability of the entire valve body on the equipment and effectively resists vibration and stress.

[0022] A reinforcing rib 17 is provided between the valve body, the first air rod 6 and the second air rod 7. The reinforcing rib 17 can improve the structural strength of the first air rod 6 and the second air rod 7 and prevent them from breaking due to collision during transportation and handling.

[0023] The valve body 1 has two steps 18 near the upper end. The two steps 18 are evenly distributed around the circumference. The steps 18 are provided with second fixing holes 19, through which the valve body can be installed and fixed.

[0024] The outer side of the air inlet 3 is provided with a connecting ear 20, and the connecting ear 20 has a mounting hole 21. The hole 21 is used to connect with the air source input interface and then fix it with screws to improve the sealing performance and prevent it from loosening from the air source input interface.

[0025] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A gas valve body, characterized in that: The valve core cavity (2) is located inside the valve body (1). The bottom of the valve body (1) is provided with an air inlet (3). The outer side of the valve body (1) is provided with a vertical air passage (4) that connects to the air inlet (3). The vertical air passage (4) is connected to a transverse air passage (5) that extends through to the valve core cavity (2). The front side of the valve body (1) is provided with a first air rod (6) that extends forward. The first air rod (6) is connected to a second air rod (7) that extends vertically. The second air rod (7) is provided with a first air outlet (8) that opens forward near the top. The first air outlet (8) connects to the valve core cavity (2) through the second air rod (7) and the first air rod (6). A core-pulling recess (9) is provided between the cavity wall of the valve core cavity (2) and the outer wall of the valve body (1). The transverse air passage (5) and the first air rod (6) both pass through the core-pulling recess (9).

2. A gas valve body according to claim 1, characterized in that: The valve body (1) has a first horizontal tube (10) extending outward on the left side. The first horizontal tube (10) is connected to the valve core cavity (2). The first horizontal tube (10) has a third air rod (11) extending forward. The first horizontal tube (10) and the axis of the valve core cavity (2) form an angle of 60°-80°. The third air rod (11) has a second air outlet (12) on its front side.

3. A gas valve body according to claim 1, characterized in that: The valve body (1) has a second horizontal tube (13) extending outward on the right side. The second horizontal tube (13) is horizontally arranged, and the upper end of the second horizontal tube (13) is flush with the upper end face of the valve core cavity (2). The front side of the second horizontal tube (13) is provided with a mounting platform (14), and the front side of the mounting platform (14) has a third air outlet (15) that communicates with the second horizontal tube (13).

4. A gas valve body according to claim 3, characterized in that: The vertical air passage (4) and the horizontal air passage (5) are located in the angle region between the axis of the first air rod (6) and the axis of the second horizontal tube (13).

5. A gas valve body according to claim 3 or 4, characterized in that: The mounting platform (14) is provided with a first fixing hole (16).

6. A gas valve body according to claim 1, characterized in that: A reinforcing rib (17) is provided between the valve body, the first air rod (6), and the second air rod (7).

7. A gas valve body according to claim 1, characterized in that: The valve body (1) has two steps (18) near the upper end. The two steps (18) are evenly distributed around the circumference, and a second fixing hole (19) is provided on the step (18).

8. A gas valve body according to claim 1, characterized in that: The air inlet (3) is provided with a connecting ear (20) on the outside, and the connecting ear (20) has a mounting hole (21).

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