Gas switch valve

Abstract

The utility model relates to a gas switch valve, which belongs to the technical field of gas control valves, and comprises a valve body, a knob, a valve core and a valve tip, the valve body comprises a gas inlet cylinder, a cylinder and a gas outlet cylinder which are integrally connected, the outer wall of the cylinder is provided with a chute, one end of the cylinder is provided with a blind hole, and the blind hole is provided with a through hole; the knob is sleeved outside the column body in a clearance manner; the valve element comprises a valve rod and a valve disc which are integrally connected and vertically arranged, and the valve rod rotates in the blind hole. The valve disc is located in the air inlet cylinder and provided with a valve hole. The valve tip slides in the sliding groove, one end of the valve tip is fixed to the knob, and the other end of the valve tip is fixed to the valve rod. The through hole communicated with the air inlet cylinder and the air outlet cylinder is formed in the column body, then one side face of the valve disc makes contact with one end face of the column body, when the rotary knob is rotated, the valve disc can be driven to rotate, the valve hole and the through hole are oppositely arranged to conduct the air inlet cylinder and the air outlet cylinder, or the valve hole and the through hole are arranged in a staggered mode to block the air inlet cylinder and the air outlet cylinder. The valve disc is prevented from being abraded, the micro-leakage phenomenon is prevented, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas control valve technology, and in particular to a gas on / off valve. Background Technology

[0002] A gas valve is a new type of safety accessory for gas pipeline projects. It is used to cut off, connect, and regulate the gas in the pipeline. It has good control characteristics and sealing performance and is suitable for pipelines carrying various gas media such as city gas, liquefied petroleum gas, natural gas, and oxygen.

[0003] Currently, traditional gas valves mainly consist of a valve body, valve seat, valve core, elastic sealing plate, and spring. For example, patent number 201510521865.7, entitled "An Invention Patent for a Gas Valve," describes a valve core with an annular shoulder on its outer circumference. The annular shoulder has external threads, and the valve core passes through a small hole in the valve seat, sealing against it. The annular shoulder also engages with the internal threads of the small hole in the valve seat. The bottom end of the valve core passes through a through hole, and an elastic sealing plate is fixedly mounted at the bottom of the valve core. The surface area of ​​the elastic sealing plate is larger than the diameter of the through hole. A spring is positioned below the elastic sealing plate, with one end pressing against the bottom wall of the air intake channel and the other end pressing against the elastic sealing plate. Rotating the valve core downwards pushes open the elastic sealing plate, connecting the air intake and exhaust channels. Rotating the valve core upwards causes the elastic sealing plate to seal the through hole under the force of the spring, separating the air intake and exhaust channels. In other words, existing technologies typically use only one seal to close the entire through hole to block the air intake and exhaust channels. Although this can also block or open the air intake and exhaust channels, thus enabling the gas valve to open or close.

[0004] However, simply using a seal to seal the entire through hole can lead to wear in practical applications due to varying tightening forces. This can cause the outer wall of the seal to rub against the wall of the through hole, and when combined with factors such as seal aging, micro-leakage can easily occur, potentially causing safety accidents.

[0005] Therefore, how to design a gas switching valve that is easy to operate, not easily worn, and has a good seal is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] This utility model provides a gas switching valve that solves the technical problem of micro-leakage in existing gas valves.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a gas switching valve, comprising: a valve body, a knob, a valve core, and a valve pin.

[0008] The valve body includes an integrally connected air inlet cylinder, column, and air outlet cylinder. The outer wall of the column is provided with a circumferentially arranged sliding groove, and one end of the column near the air inlet cylinder is provided with a blind hole communicating with the sliding groove. The column is provided with a through hole communicating with the air inlet cylinder and the air outlet cylinder. The knob is a cylindrical structure and is fitted with a gap on the outer periphery of the column. The valve core includes an integrally connected and vertically arranged valve stem and valve disc. The valve stem rotates in the blind hole. The valve disc is located in the air inlet cylinder, and one side of the valve disc is sealed and rotates against the end face of the column near the air inlet cylinder. The valve disc is provided with a valve hole that can communicate with the through hole. The valve tip slides in the sliding groove, and one end of the valve tip extends out of the sliding groove and is fixed to the knob. The other end of the valve tip extends into the blind hole and is fixed to the valve stem, so that after rotating the knob, the valve disc is driven to rotate, so that the valve hole communicates with the through hole.

[0009] The beneficial effects of this utility model are: changing the structure of the traditional gas switch valve, firstly, a through hole communicating with the air inlet and outlet cylinders is set on the column, and then one side of the valve disc contacts one end of the column. Since the valve disc is provided with a valve hole that can communicate with the through hole, and since one end of the valve pin that slides in the slide groove is fixed on the knob and the other end is fixed on the valve stem, when the knob is turned, the valve disc can be driven to rotate through the valve stem, so that the valve hole and the through hole are arranged opposite to each other to conduct the air inlet and outlet cylinders, or the valve hole and the through hole are arranged in a staggered manner to block the air inlet and outlet cylinders, so as to avoid the valve disc sliding in the through hole and causing wear, prevent micro-leakage, and improve the sealing performance of the gas switch valve.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, there are at least two through holes and at least two valve holes, and the at least two through holes can be arranged opposite to the at least two valve holes respectively.

[0012] Furthermore, it also includes a sealing ring, wherein the inner wall of the blind hole is provided with an annular groove; the outer wall of the valve stem is provided with an annular groove; the inner ring of the sealing ring is fitted in the annular groove and the outer ring slides in the annular groove.

[0013] The further beneficial effect of adopting the above is that: firstly, the inner ring of the sealing ring is fixed in the annular groove of the valve stem, and then the outer ring of the sealing ring slides in the annular groove, which can improve the sealing between the valve stem and the blind hole and prevent the gas in the air inlet cylinder from overflowing from the gap between the valve stem and the blind hole.

[0014] Furthermore, it also includes an air intake assembly, one end of which is detachably connected to the end of the air intake cylinder away from the column.

[0015] Furthermore, the air intake assembly includes an integrally connected connecting cylinder and a hollow connecting core, and the end of the connecting cylinder away from the connecting core is detachably connected to the end of the air intake cylinder away from the column.

[0016] Furthermore, it also includes a first adapter nut, wherein the outer wall of the connecting core is provided with an external thread, and the first adapter nut is threadedly connected to the external thread of the connecting core.

[0017] Furthermore, it also includes a sealing ring, which passes through the air intake cylinder and has one end in contact with one end of the air intake assembly.

[0018] The further beneficial effect of adopting the above is that the sealing ring can reduce the gap between the valve disc and the column, preventing the air in the intake cylinder from overflowing from the gap between the valve disc and the column.

[0019] Furthermore, it also includes an air outlet, one end of which is detachably connected to the end of the air outlet cylinder away from the column.

[0020] Furthermore, it also includes a high-temperature melting core, which is located inside the air outlet cylinder and one side of it is in contact with the end face of the column near the air outlet cylinder.

[0021] The further beneficial effects of adopting the above are:

[0022] 1. By using one side of the high-temperature melting core to contact the end face of the column near the gas outlet, impurities in the gas can be filtered out;

[0023] 2. The high-temperature melting core can prevent the gas blown out of the gas outlet from flowing back, thus avoiding a fire.

[0024] Furthermore, it also includes a compression spring, which is placed inside the air outlet cylinder with one end in contact with the air outlet head and the other end in contact with the high-temperature melting core.

[0025] The further beneficial effect of adopting the above is that when the high-temperature melt core melts in time when tempering occurs, it blocks the gas passage under the action of the spring, effectively preventing tempering from occurring and improving safety.

[0026] Furthermore, the cross-section of the high-temperature melting core is circular. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the assembly structure of a gas switching valve according to the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of a gas switching valve according to the present invention;

[0029] Figure 3 This is an exploded structural diagram of a gas switching valve according to the present invention.

[0030] Figure 4 This is a front view structural diagram of the valve body in a gas switching valve according to the present invention;

[0031] Figure 5 This is a right-side view of the valve body in a gas switching valve according to the present invention.

[0032] Figure 6 This is a schematic diagram of the left side of the valve body in a gas switching valve according to the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Valve body; 11. Inlet cylinder; 12. Column; 121. Slide groove; 122. Blind hole; 123. Through hole; 13. Outlet cylinder; 2. Knob; 3. Valve core; 31. Valve stem; 32. Valve disc; 321. Valve hole; 4. Valve pin; 5. Sealing ring; 6. Inlet assembly; 61. Connecting cylinder; 62. Connecting core; 7. Sealing ring; 8. Compression spring; 9. Outlet head; 10. High-temperature melting core; 14. First adapter nut; 15. Second adapter nut. Detailed Implementation

[0035] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a gas switching valve includes: a valve body 1, a knob 2, a valve core 3, and a valve pin 4.

[0037] Valve body 1 includes an integrally connected air inlet cylinder 11, column 12, and air outlet cylinder 13. The outer wall of column 12 has a circumferentially arranged sliding groove 121, and one end of column 12 near the air inlet cylinder 11 has a blind hole 122 communicating with the sliding groove 121. Column 12 also has a through hole 123 communicating with the air inlet cylinder 11 and the air outlet cylinder 13. Knob 2 is a cylindrical structure and is fitted loosely around the outer periphery of column 12. Valve core 3 includes an integrally connected and vertically arranged valve stem 31 and valve disc 32. The valve stem 31 rotates... The valve disc 32 is located inside the intake cylinder 11, and one side of the valve disc 32 is sealed and rotates against the end face of the column 12 near the intake cylinder 11. The valve disc 32 is provided with a valve hole 321 that can communicate with the through hole 123. The valve pin 4 slides in the slide groove 121, and one end of the valve pin extends out of the slide groove 121 and is fixed on the knob 2. The other end of the valve pin extends into the blind hole 122 and is fixed on the valve stem 31. After the knob 2 is turned, the valve disc 32 is driven to rotate, so that the valve hole 321 communicates with the through hole 123.

[0038] like Figure 5As shown, in some specific embodiments, there can be at least two through holes 123 and valve holes 321, and at least two through holes 123 can be arranged opposite to at least two valve holes 321 respectively.

[0039] like Figure 3 As shown, in some specific embodiments, a sealing ring 5 may also be included. An annular groove 121 is provided on the inner wall of the blind hole 122; an annular groove is provided on the outer wall of the valve stem 31; the inner ring of the sealing ring 5 is fitted in the annular groove and the outer ring slides in the annular groove 121.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, in some specific embodiments, an air intake assembly 6 may also be included, one end of which is detachably connected to the end of the air intake cylinder 11 away from the column 12.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, in some specific embodiments, the air intake assembly 6 may include an integrally connected connecting cylinder 61 and a hollow connecting core 62, and the end of the connecting cylinder 61 away from the connecting core 62 may be detachably connected to the end of the air intake cylinder 11 away from the column 12.

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, in some specific embodiments, a first adapter nut 14 is also included. The outer wall of the connecting core 62 is provided with an external thread, and the first adapter nut 14 is threadedly connected to the external thread of the connecting core 62.

[0043] like Figure 2 and Figure 3 As shown, in some specific embodiments, a sealing ring 7 is also included, which passes through the air intake cylinder 11 and one end of the sealing ring 7 contacts one end of the air intake assembly 6.

[0044] like Figure 1 , Figure 2 and Figure 3 As shown, in some specific embodiments, an air outlet 9 is also included, one end of which is detachably connected to the end of the air outlet cylinder 13 away from the column 12.

[0045] like Figure 2 and Figure 3 As shown, in some specific embodiments, a high-temperature melting core 10 may also be included, which is located inside the venting cylinder 13 and one side thereof is in contact with the end face of the column 12 near the venting cylinder 13.

[0046] like Figure 2As shown, in some specific embodiments, a compression spring 8 may also be included. The compression spring 8 is placed inside the air outlet cylinder 13, with one end in contact with the air outlet head 9 and the other end in contact with the high-temperature melting core 10.

[0047] Specifically, the cross-section of the high-temperature melting core 10 is circular.

[0048] Specifically, a second adapter nut 15 is fitted on the outer periphery of the air outlet 9.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gas on / off valve, characterized in that, include: Valve body (1), the valve body (1) includes an integrally connected air inlet cylinder (11), column (12) and air outlet cylinder (13), the outer wall of the column (12) is provided with a circumferentially arranged sliding groove (121) and a blind hole (122) communicating with the sliding groove (121) at one end near the air inlet cylinder (11), and the column (12) is provided with a through hole (123) communicating with the air inlet cylinder (11) and the air outlet cylinder (13); Knob (2), the knob (2) is a cylindrical structure and is fitted with a gap on the outer periphery of the column (12); The valve core (3) includes an integrally connected and vertically arranged valve stem (31) and valve disc (32). The valve stem (31) rotates within the blind hole (122). The valve disc (32) is located within the air inlet cylinder (11), and one side of it is sealed and rotates against the end face of the column (12) near the air inlet cylinder (11). The valve disc (32) is provided with a valve hole (321) that can communicate with the through hole (123). The valve pin (4) slides in the groove (121) and one end of the valve pin extends out of the groove (121) and is fixed on the knob (2). The other end of the valve pin extends into the blind hole (122) and is fixed on the valve stem (31). When the knob (2) is turned, the valve disc (32) is driven to rotate, so that the valve hole (321) communicates with the through hole (123).

2. A gas switching valve according to claim 1, characterized in that, There are at least two through holes (123) and at least two valve holes (321), and at least two of the through holes (123) can be arranged opposite to at least two of the valve holes (321).

3. A gas switching valve according to claim 1, characterized in that, It also includes a sealing ring (5), and the inner wall of the blind hole (122) is provided with an annular groove (121); the outer wall of the valve stem (31) is provided with an annular groove; the inner ring of the sealing ring (5) is fitted in the annular groove and the outer ring slides in the annular groove (121).

4. A gas switching valve according to claim 1, characterized in that, It also includes an air intake assembly (6), one end of which is detachably connected to the end of the air intake cylinder (11) away from the column (12).

5. A gas switching valve according to claim 4, characterized in that, The air intake assembly (6) includes an integrally connected connecting cylinder (61) and a hollow connecting core (62). The end of the connecting cylinder (61) away from the connecting core (62) is detachably connected to the end of the air intake cylinder (11) away from the column (12).

6. A gas switching valve according to claim 5, characterized in that, It also includes a first adapter nut (14), on the outer wall of the connecting core (62) having an external thread, and the first adapter nut (14) is threaded onto the external thread of the connecting core (62).

7. A gas switching valve according to claim 4, characterized in that, It also includes a sealing ring (7), which passes through the air inlet cylinder (11) and one end of it contacts one end of the air inlet assembly (6).

8. A gas switching valve according to claim 1, characterized in that, It also includes an air outlet (9), one end of which is detachably connected to the end of the air outlet cylinder (13) away from the column (12).

9. A gas switching valve according to claim 8, characterized in that, It also includes a high-temperature melting core (10), which is located inside the air outlet cylinder (13) and one side of it is in contact with the end face of the column (12) near the air outlet cylinder (13).

10. A gas switching valve according to claim 9, characterized in that, It also includes a compression spring (8), which is placed inside the air outlet cylinder (13) with one end in contact with the air outlet head (9) and the other end in contact with the high-temperature melting core (10).

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