Gas switch valve

Abstract

The invention 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 column body and a gas outlet cylinder which are integrally connected, the outer wall of the column body is provided with a chute, one end of the column body 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] The present invention relates to the technical field of gas control valves, and in particular to a gas switch valve. Background Art

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

[0003] At present, the traditional gas valve is mainly composed of a valve body, a valve seat, a valve core, an elastic sealing plate and a spring. For example, the patent number is 201510521865.7, which is called a gas valve invention patent. In this patent, an annular convex shoulder is arranged on the middle outer circle of the valve core, and an external thread is arranged on the annular convex shoulder. The valve core passes through the small hole of the valve seat and seals with the valve seat. The annular convex shoulder is in thread with the internal thread of the small hole of the valve seat; the bottom end of the valve core passes through the through hole, and the elastic sealing plate is fixedly arranged at the bottom of the valve core. The plate size of the elastic sealing plate is larger than the aperture size of the through hole. The spring is arranged below the elastic sealing plate, and one end of the spring is pressed on the bottom wall of the air inlet channel, and the other end of the spring is pressed on the elastic sealing plate. Rotating the valve core downward can push the elastic sealing plate downward, and the air inlet channel and the air outlet channel are connected. Rotating the valve core upward, the elastic sealing plate seals the through hole under the action of the spring, and the air inlet channel and the air outlet channel are separated. That is to say, the prior art usually uses only one seal to seal the entire through hole to block the air inlet channel and the air outlet channel, although it can also block or open the air inlet channel and the air outlet channel to open or close the gas valve.

[0004] However, if only the seal is used to seal the entire through hole, in actual applications, due to the different tightening forces, the outer wall of the seal often rubs against the wall of the through hole, causing wear. Coupled with factors such as aging of the seal, micro-leakage is very likely to occur, causing safety accidents.

[0005] Therefore, how to design a gas switch valve that is easy to operate, not prone to wear and has good sealing is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The invention provides a gas switch valve, which solves the technical problem that the existing gas valve is prone to micro-leakage.

[0007] The technical solution of the present invention to solve the above technical problem is as follows: a gas switch valve, comprising: a valve body, a knob, a valve core and a valve tip,

[0008] The valve body comprises an air inlet cylinder, a column and an air outlet cylinder which are integrally connected, a slide groove arranged along the circumferential direction is provided on the outer wall of the column and a blind hole which is connected to the slide groove is provided at one end thereof close to the air inlet cylinder, and a through hole which is connected to the air inlet cylinder and the air outlet cylinder is provided on the column; the knob is a cylindrical structure and a gap is sleeved on the outer circumferential side of the column; the valve core comprises a valve stem and a valve disc which are integrally connected and vertically arranged, and the valve stem rotates in the blind hole; the valve disc is located in the air inlet cylinder and one side surface thereof is in sealing and rotatable abutment with an end surface of the column close to the air inlet cylinder, and a valve hole which can be connected to the through hole is provided on the valve disc; the valve tip slides in the slide groove and one end thereof extends out of the slide groove notch and is fixed on the knob, and the other end thereof extends into the blind hole and is fixed on the valve stem, so that after the knob is turned, the valve disc is driven to rotate so that the valve hole is connected to the through hole.

[0009] The beneficial effects of the present invention are as follows: the structure of the traditional gas switch valve is changed, a through hole connected to the air inlet and the air outlet is first arranged on the column, and then one side of the valve disc is used to contact one end face of the column. Since the valve disc is provided with a valve hole that can be connected to the through hole, and since one end of the valve tip sliding 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 relative to each other to connect the air inlet and the air outlet, or the valve hole and the through hole are staggered to block the air inlet and the air outlet, so as to avoid the valve disc sliding in the through hole and causing wear, prevent micro-leakage, and improve the sealing of the gas switch valve.

[0010] Based on the above technical solution, the present invention can also be 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, an annular groove is provided on the inner hole wall of the blind hole; an annular groove is provided on the outer rod wall of the valve stem; the inner ring of the sealing ring is fixed in the annular groove and the outer ring slides in the annular groove.

[0013] The above method has the following further beneficial effects: the inner ring of the sealing ring is firstly fixed in the annular groove of the valve stem, and then the outer ring of the sealing ring is slid in the annular groove, so as to improve the sealing between the valve stem and the blind hole and prevent the gas in the air intake 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 an end of the air intake cylinder away from the column.

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

[0016] Furthermore, it also includes a first adapter nut, 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 is inserted into the air intake cylinder and one end of which is in contact with one end of the air intake assembly.

[0018] A further beneficial effect of adopting the above method is that the gap between the valve disc and the column can be reduced by using the sealing ring, thereby preventing the air in the air intake cylinder from overflowing from the gap between the valve disc and the column.

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

[0020] Furthermore, it also includes a high temperature soluble core, which is located in the gas outlet and one side of which is in contact with an end surface of the column close to the gas outlet.

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

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

[0023] 2. High temperature melt core can prevent the gas blown out from the outlet head from flowing back and avoid fire.

[0024] Furthermore, it also includes a compression spring, which is placed in the gas outlet tube and has one end in contact with the gas outlet head and the other end in contact with the high-temperature soluble core.

[0025] A further beneficial effect of the above method is that when the high-temperature melt core melts in time when tempering occurs, the airway is blocked under the action of the spring, thereby effectively preventing the tempering from occurring and improving safety.

[0026] Furthermore, the cross section of the high temperature soluble core is a circular structure. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0029] Figure 3 This is a schematic diagram of the explosion structure of a gas switch valve of the present invention;

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

[0031] Figure 5 It is a right side structural schematic diagram of a valve body in a gas switching valve of the present invention;

[0032] Figure 6 The figure is a left side structural schematic diagram of a valve body in a gas switching valve of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Valve body, 11. Air inlet tube, 12. Cylinder, 121. Slide groove, 122. Blind hole, 123. Through hole, 13. Air outlet tube, 2. Knob, 3. Valve core, 31. Valve stem, 32. Valve disc, 321. Valve hole, 4. Valve tip, 5. Sealing ring, 6. Air inlet assembly, 61. Connecting tube, 62. Connecting core, 7. Sealing ring, 8. Compression spring, 9. Air outlet head, 10. High-temperature soluble core, 14. First transfer nut, 15. Second transfer nut. DETAILED DESCRIPTION

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a gas switch valve comprises: a valve body 1, a knob 2, a valve core 3 and a valve tip 4,

[0037] The valve body 1 includes an air inlet cylinder 11, a column 12 and an air outlet cylinder 13 which are connected in an integral manner. The outer wall of the column 12 is provided with a slide groove 121 arranged in the circumferential direction and a blind hole 122 which is connected to the slide groove 121 is provided at one end thereof close to the air inlet cylinder 11. The column 12 is provided with a through hole 123 which is connected to the air inlet cylinder 11 and the air outlet cylinder 13. The knob 2 is a cylindrical structure and is sleeved on the outer peripheral side of the column 12. The valve core 3 includes a valve stem 31 and a valve disc 32 which are connected in an integral manner and arranged vertically. The valve stem 31 rotates The valve disc 32 is located in the air inlet cylinder 11 and one side thereof is in sealing rotational contact with an end face of the column 12 close to the air inlet cylinder 11, and a valve hole 321 which can communicate with the through hole 123 is provided on the valve disc 32; the valve tip 4 slides in the slide groove 121 and one end thereof extends out of the notch of the slide groove 121 and is fixed on the knob 2, and the other end thereof extends into the blind hole 122 and is fixed on the valve stem 31, so that after the knob 2 is turned, the valve disc 32 is driven to rotate, so that the valve hole 321 is communicated with the through hole 123.

[0038] like Figure 5As shown, in some specific embodiments, there may be at least two through holes 123 and at least two valve holes 321 , and the at least two through holes 123 may be arranged opposite to the 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 hole wall of the blind hole 122; an annular groove is provided on the outer rod wall of the valve stem 31; the inner ring of the sealing ring 5 is fixed 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, and one end of the air intake assembly 6 may be detachably connected to an 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 one end of the connecting cylinder 61 away from the connecting core 62 is detachably connected to one 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 transfer nut 14 is further included, an outer wall of the connecting core 62 is provided with an external thread, and the first transfer 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 further included. The sealing ring 7 is inserted into 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, a gas outlet head 9 is further included, and one end of the gas outlet head 9 is detachably connected to an end of the gas outlet tube 13 away from the column 12.

[0045] like Figure 2 and Figure 3 As shown, in some specific embodiments, a high temperature soluble core 10 may be further included. The high temperature soluble core 10 is located in the gas outlet 13 and one side surface of the high temperature soluble core 10 is in contact with an end surface of the column 12 close to the gas outlet 13 .

[0046] like Figure 2As shown, in some specific embodiments, a compression spring 8 may also be included. The compression spring 8 is placed in the gas outlet tube 13 and one end of the compression spring 8 contacts the gas outlet head 9 and the other end of the compression spring 8 contacts the high-temperature molten core 10 .

[0047] Specifically, the cross section of the high temperature melt core 10 is a circular structure.

[0048] Specifically, a second adapter nut 15 is sleeved on the outer circumference of the air outlet head 9 .

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

Claims

1. A gas switch valve, characterized in that: include: A valve body (1), the valve body (1) comprising an air inlet cylinder (11), a column (12) and an air outlet cylinder (13) connected in an integral manner, the outer wall of the column (12) being provided with a slide groove (121) arranged in a circumferential direction and one end thereof close to the air inlet cylinder (11) being provided with a blind hole (122) communicating with the slide groove (121), the column (12) being provided with a through hole (123) communicating with the air inlet cylinder (11) and the air outlet cylinder (13); A knob (2), the knob (2) being a cylindrical structure and being loosely sleeved on the outer circumference of the column (12); A valve core (3), the valve core (3) comprising a valve stem (31) and a valve disc (32) which are integrally connected and vertically arranged, the valve stem (31) rotating in the blind hole (122); the valve disc (32) is located in the air inlet cylinder (11) and one side surface thereof is in sealing and rotatable contact with an end surface of the column (12) close to the air inlet cylinder (11), and the valve disc (32) is provided with a valve hole (321) which can communicate with the through hole (123); A valve tip (4), wherein the valve tip (4) slides in the slide groove (121) and one end of the valve tip (4) extends out of the notch of the slide groove (121) and is fixed on the knob (2), and the other end of the valve tip (4) extends into the blind hole (122) and is fixed on the valve stem (31), so that after the knob (2) is turned, the valve disc (32) is driven to rotate, so that the valve hole (321) is communicated 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 the at least two through holes (123) can be arranged opposite to the at least two valve holes (321), respectively.

3. A gas switching valve according to claim 1, characterized in that: It also includes a sealing ring (5), an annular groove (121) is provided on the inner hole wall of the blind hole (122); an annular groove is provided on the outer rod wall of the valve stem (31); the inner ring of the sealing ring (5) is fixed 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 comprises an air intake assembly (6), one end of which is detachably connected to an 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) comprises an integrally connected connection tube (61) and a hollow connection core (62); an end of the connection tube (61) away from the connection core (62) is detachably connected to an end of the air intake tube (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), an 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).

7. A gas switching valve according to claim 4, characterized in that: It also includes a sealing ring (7), which is inserted into the air intake cylinder (11) and one end of which is in contact with one end of the air intake assembly (6).

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

9. A gas switching valve according to claim 8, characterized in that: It also comprises a high temperature soluble core (10), wherein the high temperature soluble core (10) is located in the gas outlet tube (13) and one side surface of the high temperature soluble core (10) is in contact with an end surface of the column (12) close to the gas outlet tube (13).

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

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