Fuel gas overflowing cut-off double-nozzle valve

Abstract

A connecting nut is arranged at the upper end of a Y-shaped valve body, connecting pipes are arranged on the two sides of the lower end of the Y-shaped valve body, a valve element assembly is arranged in each connecting pipe, a control valve is arranged on each connecting pipe, and each valve element assembly comprises an overflowing cut-off valve element, a valve element outer sleeve, a moving rod and a reset spring. Wherein the valve element outer sleeve is arranged in an air channel in the connecting pipe on the corresponding side, the overflowing cut-off valve element is arranged in the valve element outer sleeve, the front end of the moving rod is inserted into the valve element outer sleeve and fixedly connected with the rear side of the overflowing cut-off valve element, the moving rod is sleeved with the reset spring, and the reset spring is located on the outer side of the valve element outer sleeve. An air passing opening is formed in the middle of the front end of the valve element outer sleeve, and a plurality of supporting rods are arranged at the rear end in the circumferential direction. The Y-shaped valve body structure is adopted to replace an existing T-shaped gas valve body structure, and the valve element assemblies with the overflowing automatic cut-off protection function are arranged in the connecting pipes on the two sides of the Y-shaped valve body, so that the use safety of the double-nozzle valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas safety, in particular to a gas over-flow cut-off double-mouth valve. Background Art

[0002] In the prior art, the stove valve can be divided into two types according to the output method: a single-mouth valve (connected to one hose) and a double-mouth valve (also called a double-tip valve, connected to two hoses). Among them, the double-mouth valve has a relatively special structure, and the double-mouth valve body in the prior art does not have an over-current protection structure such as an over-current cut-off valve core. Therefore, it cannot automatically cut off the gas after the hose falls off, and the over-current automatic cut-off protection has been enforced as a national standard.

[0003] The gas double-mouth valve (or double-pointed valve) in the prior art is usually a T-shaped structure. For example, the Chinese utility model patent with the authorization announcement number CN219282528U discloses a gas double-pointed valve, the lower end of which is vertically connected to the pipeline, and the two ends of the pipeline are respectively provided with connecting ports to communicate with the external gas pipe. For example, the Chinese utility model patent with the authorization announcement number CN217003276U discloses a gas double-pointed valve with a variable valve port direction, but the change of the device is that the valve port direction is adjustable, and the internal pull rod and pull cap are installed through the magnetic U frame, and the bottom surface of the change-direction mounting plate drives the flow valve nozzle to adjust, which makes the internal valve core structure of the device more complicated. The Chinese utility model patent with the authorization announcement number CN219796250U discloses a ram-horn valve, but the ram-horn valve is used for fluid delivery systems, and the problem to be solved is how to facilitate the installation and disassembly of the valve body, and the valve body cannot be used in the gas field. Utility Model Content

[0004] The utility model aims to provide a double-mouth gas over-flow cut-off valve, which adopts a Y-type valve body structure to replace the existing T-type gas valve body structure, and the connecting pipes on both sides of the Y-type valve body are provided with valve core components with an over-flow automatic cut-off protection function, thereby improving the safety of the double-mouth valve.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A gas over-flow cut-off double-mouth valve comprises a Y-shaped valve body, a valve core assembly and a control valve, wherein the upper end of the Y-shaped valve body is provided with a connecting nut, and the two sides of the lower end are provided with connecting pipes, each connecting pipe is provided with a valve core assembly inside, and each connecting pipe is provided with a control valve, the valve core assembly comprises an over-flow cut-off valve core, a valve core sleeve, a moving rod and a reset spring, wherein the valve core sleeve is arranged in the air passage inside the corresponding side connecting pipe, the over-flow cut-off valve core is arranged in the valve core sleeve, the front end of the moving rod (203) is inserted into the valve core sleeve and is fixedly connected to the rear side of the over-flow cut-off valve core, the moving rod is sleeved with a reset spring, and the reset spring is located outside the valve core sleeve, the front middle part of the valve core sleeve is provided with an air port, and the rear end is provided with a plurality of support rods along the circumferential direction.

[0007] A shell is provided at the front end of the valve core sleeve, and an air port is provided in the middle of the front end of the shell. A support rod is provided at the rear end of the shell, and the rear ends of the support rods are connected to the support seat in the middle, and the moving rod passes through the through hole in the middle of the support seat.

[0008] A spring stop block is arranged at the rear end of the moving rod, and the return spring is arranged between the support seat and the spring stop block.

[0009] The over-current cut-off valve core comprises a valve core umbrella body and a valve core umbrella tip arranged at the front end of the valve core umbrella body.

[0010] A sealing sleeve is arranged inside the connecting pipe, and a valve core assembly is arranged in the sealing sleeve, wherein the sealing sleeve is arranged between the valve core outer sleeve and the tube shell of the connecting pipe.

[0011] A connecting cavity is formed at the intersection of the connecting nut of the Y-shaped valve body and the two connecting pipes, and a pressure sensor is arranged in the connecting cavity.

[0012] A connecting cavity is formed at the intersection of the connecting nut of the Y-shaped valve body and the two connecting pipes, and a partition is arranged in the connecting cavity.

[0013] The advantages and positive effects of the utility model are:

[0014] 1. The utility model adopts a Y-type valve body structure to replace the existing T-type gas valve body structure, and the connecting pipes on both sides of the Y-type valve body are provided with valve core components with an over-current automatic cut-off protection function, thereby improving the safety of the double-mouth valve.

[0015] 2. The intersection of the two connecting pipes and the connecting nut of the Y-type valve body of the utility model forms a connecting cavity, and a pressure sensor or other types of sensors can be set inside the connecting cavity as needed to monitor the gas pressure in real time and give an alarm in time to prompt the operator to close the corresponding control valve.

[0016] 3. A partition can be provided in the communicating cavity of the Y-shaped valve body of the utility model as required to separate the valve core components on both sides to avoid mutual influence. At the same time, the partition can also play a role in diverting and guiding the gas flow.

[0017] 4. The valve core assembly adopted in the utility model has a compact structure, so it can be integrated into the Y-type valve body, and also has the advantages of sensitive response and reliable cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the state when the over-current cut-off valve core in the left connecting pipe is closed.

[0020] Figure 3 This is the front view of the utility model.

[0021] Figure 4 for Figure 1 Schematic diagram of the structure inside any connecting pipe of the Y-type valve body.

[0022] Figure 5 for Figure 4 Schematic diagram of the control valve closed state,

[0023] Figure 6 for Figure 4 Schematic diagram of the valve core assembly structure,

[0024] Figure 7 This is a schematic structural diagram of another embodiment of the utility model.

[0025] Among them, 1 is a Y-type valve body, 101 is a connecting nut, 102 is a connecting pipe, 103 is a connecting cavity, 2 is a valve core assembly, 201 is an over-current cut-off valve core, 2011 is a valve core umbrella tip, 2012 is a valve core umbrella body, 202 is a reset spring, 203 is a moving rod, 2031 is a spring limit block, 204 is a sealing sleeve, 205 is a valve core jacket, 2051 is a shell, 2052 is a support rod, 2053 is a support seat, 3 is a control valve, 301 is a control valve core, and 4 is a partition. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 7As shown, the utility model includes a Y-type valve body 1, a valve core assembly 2 and a control valve 3, wherein the upper end of the Y-type valve body 1 is provided with a connecting nut 101, and both sides of the lower end are provided with connecting pipes 102 symmetrically arranged at an angle of 90 degrees, each connecting pipe 102 is provided with a valve core assembly 2 inside, and each connecting pipe 102 is provided with a control valve 3.

[0028] like Figure 4 and Figure 6 As shown, in this embodiment, the valve core assembly 2 includes an over-current cut-off valve core 201, a valve core sleeve 205, a moving rod 203 and a reset spring 202, wherein the valve core sleeve 205 is arranged in the air passage inside the corresponding side connecting pipe 102, the over-current cut-off valve core 201 is arranged in the valve core sleeve 205, the front end of the moving rod 203 is inserted into the valve core sleeve 205 and is fixedly connected to the rear side of the over-current cut-off valve core 201, the moving rod 203 is sleeved with a reset spring 202, and the reset spring 202 is located on the outside of the valve core sleeve 205, the front end of the valve core sleeve 205 is provided with an air port, and the rear end is provided with a plurality of support rods 2052 along the circumferential direction. When the gas is normally transmitted, it first enters the valve core sleeve 205 through the gap between the support rods 2052, and then flows into the corresponding connecting pipe 102 through the air port at the front end of the valve core sleeve 205. When the hose at the outlet of the end of the connecting pipe 102 falls off, the gas will instantly leak in excess flow, and as shown in FIG. Figure 2 As shown, due to the instantaneous increase in airflow, the over-current cut-off valve core 201 will move forward quickly and block the air port on the front side of the valve core sleeve 205, and the over-current cut-off valve core 201 can be tightly blocked on the air port under the pressure of excess gas airflow and cannot automatically return, thereby realizing the automatic gas cut-off function of the gas double-mouth valve.

[0029] like Figure 6 As shown, in this embodiment, the front end of the valve core sleeve 205 is provided with a shell 2051, and the middle part of the front end of the shell 2051 is provided with the air port, the rear end of the shell 2051 is provided with a support rod 2052, and the rear ends of each support rod 2052 are connected to the support seat 2053 in the middle, the moving rod 203 passes through the through hole in the middle of the support seat 2053, the tail end of the moving rod 203 is provided with a spring stopper 2031, and the reset spring 202 is provided between the support seat 2053 and the spring stopper 2031. Between the limit blocks 2031, when the over-flow cut-off valve core 201 blocks the air inlet at the front end of the shell 2051 due to the action of excess gas airflow, the spring limit block 2031 moves forward with the moving rod 203 and compresses the return spring 202. When the gas circulation returns to normal, the return spring 202 pushes the spring limit block 2031 to drive the moving rod 203 to automatically return to its original position. At this time, the over-flow cut-off valve core 201 also automatically returns to its original position and no longer blocks the air inlet at the front end of the valve core sleeve 205.

[0030] like Figure 6 As shown, in this embodiment, the over-flow cut-off valve core 201 is overall umbrella-shaped, and includes a valve core umbrella body 2012 and a valve core umbrella tip 2011 arranged at the front end of the valve core umbrella body 2012. The valve core umbrella body 2012 can increase the driving area of ​​the gas flow, and the valve core umbrella tip 2011 can guide the front end of the over-flow cut-off valve core 201 to be smoothly inserted into the gas port.

[0031] like Figure 4 As shown, in this embodiment, a sealing sleeve 204 is provided inside the connecting pipe 102, and the valve core assembly 2 is provided in the sealing sleeve 204, wherein the sealing sleeve 204 is provided between the valve core outer sleeve 205 and the tube shell of the connecting pipe 102 to ensure sealing, and the sealing sleeve 204 is provided with sealing rings and other components.

[0032] like Figures 1-2 As shown, when the gas is transmitted normally, the operator controls the on-off of the corresponding gas pipeline normally through the control valve 3 provided on the corresponding connecting pipe 102. In this embodiment, the control valve 3 is a ball valve, and a rotatable control valve core 301 is provided at the lower part thereof. This is a well-known technology in the art and is a commercially available product. Figure 4 The figure shows the normal open state of the control valve 3. Figure 5 The control valve 3 is shown as closed. Figure 2 As shown, when the control valve 3 is normally opened and the hose suddenly falls off, the over-current cut-off valve core 201 automatically moves forward to cut off the gas.

[0033] like Figures 1-2 As shown, in one embodiment of the present invention, the moving rod 203 and the return spring 202 thereon can be selected with a suitable length according to the ratio multiple of the designed over-current cut-off gas valve value and the rated gas flow of the valve body, thereby ensuring that the valve core components 2 on both sides of the Y-shaped valve body 1 will not collide with each other. Figures 1-2 As shown, the intersection of the two connecting pipes 102 of the Y-shaped valve body 1 and the connecting nut 101 forms a connecting cavity 103, as shown in FIG. Figure 7 As shown, in another embodiment of the utility model, a partition plate 4 may be arranged inside the communicating cavity 103 to separate the valve core components 2 on both sides, and the partition plate 4 may also play a role in diverting the gas to both sides.

[0034] A pressure sensor or other type of sensor can be installed at a suitable position in the connecting cavity 103 as needed to monitor the gas pressure inside the valve body in real time. When the hose falls off and causes the gas flow rate to increase instantly, the pressure sensor can send a signal to the control system to alarm in time. The pressure sensor is a well-known technology in the art and is a commercially available product.

[0035] The working principle of the utility model is:

[0036] Compared with the T-shaped gas double-nozzle valve in the prior art, the utility model first redesigns the valve body structure. The utility model adopts a Y-shaped valve body 1 structure, and the connecting nut 101 at the upper end is used for threaded connection with the corresponding pipeline, and the connecting pipes 102 on both sides of the lower end are respectively connected to the corresponding pipelines. The utility model changes the shape of the valve body to a Y-shape, so that it is possible to install valve core assemblies 2 inside the connecting pipes 102 on both sides. The valve core assembly 2 of the utility model adopts the valve core structure in the authorized patent CN208295546U, which has the characteristics of compact structure and sensitive response. The utility model can make the two valve core assemblies 2 respectively arranged in the connecting pipes 102 on both sides of the Y-shaped valve body 1, and the connecting cavity 103 formed at the intersection in the middle of the Y-shaped valve body 1 has sufficient accommodating space. While ensuring that the moving rod 203 of the valve core assembly 2 has a sufficient moving distance, it can also avoid the moving rods 203 of the valve core assemblies 2 on both sides from colliding and interfering with each other.

[0037] When the utility model is used, when the gas is normally transmitted, it first enters the valve core sleeve 205 through the gaps between the support rods 2052, and then flows into the corresponding connecting pipe 102 through the gas port at the front end of the valve core sleeve 205. When the hose at the outlet of the end of the connecting pipe 102 falls off, the gas will instantly leak in excess of the flow rate, and if Figure 2 As shown, due to the instantaneous increase in airflow, the over-current cut-off valve core 201 moves forward quickly and blocks the air port on the front side of the valve core sleeve 205, and the over-current cut-off valve core 201 can be tightly blocked on the air port under the action of excess gas airflow and cannot automatically return, thereby realizing the automatic cut-off function to avoid gas leakage, and a pressure sensor or other types of sensors can be arranged inside the connecting cavity 103 of the Y-type valve body 1 to realize a timely alarm function. After hearing the alarm prompt, the operator can close the control valve 3 on the corresponding side connecting pipe 102 in time, and when the gas pressure inside the connecting pipe 102 returns to normal, the reset spring 202 pushes the moving rod 203 to automatically return to its original position, and at this time, the over-current cut-off valve core 201 also automatically returns to its original position and no longer blocks the air port at the front end of the valve core sleeve 205.

Claims

1. A double-mouth gas over-flow cut-off valve, characterized in that: The invention comprises a Y-shaped valve body (1), a valve core assembly (2) and a control valve (3), wherein the upper end of the Y-shaped valve body (1) is provided with a connecting nut (101), and the two sides of the lower end are provided with connecting pipes (102), each connecting pipe (102) is provided with a valve core assembly (2), and each connecting pipe (102) is provided with a control valve (3), wherein the valve core assembly (2) comprises an over-flow cut-off valve core (201), a valve core outer sleeve (205), a moving rod (203) and a reset spring (202), wherein the valve core outer sleeve (205) is provided on the corresponding side. In the air passage inside the connecting pipe (102), the over-flow cut-off valve core (201) is arranged in the valve core sleeve (205), the front end of the moving rod (203) is inserted into the valve core sleeve (205) and is fixedly connected to the rear side of the over-flow cut-off valve core (201), the moving rod (203) is sleeved with a return spring (202), and the return spring (202) is located on the outside of the valve core sleeve (205), and the valve core sleeve (205) is provided with an air port in the middle of the front end, and a plurality of support rods (2052) are provided along the circumferential direction at the rear end.

2. The double-mouth gas over-flow cut-off valve according to claim 1, characterized in that: The front end of the valve core sleeve (205) is provided with a shell (2051), and the middle part of the front end of the shell (2051) is provided with an air outlet, and the rear end of the shell (2051) is provided with a support rod (2052), and the rear ends of each support rod (2052) are connected to the support seat (2053) in the middle, and the moving rod (203) passes through the through hole in the middle of the support seat (2053).

3. The double-mouth gas over-flow cut-off valve according to claim 2, characterized in that: A spring stop block (2031) is provided at the rear end of the moving rod (203), and the return spring (202) is provided between the support seat (2053) and the spring stop block (2031).

4. The double-mouth gas over-flow cut-off valve according to claim 1, characterized in that: The over-current cut-off valve core (201) comprises a valve core umbrella body (2012) and a valve core umbrella tip (2011) arranged at the front end of the valve core umbrella body (2012).

5. The gas over-flow cut-off double-mouth valve according to claim 1, characterized in that: A sealing sleeve (204) is provided inside the connecting pipe (102), and the valve core assembly (2) is arranged in the sealing sleeve (204), wherein the sealing sleeve (204) is arranged between the valve core outer sleeve (205) and the tube shell of the connecting pipe (102).

6. The double-mouth gas over-flow cut-off valve according to claim 1, characterized in that: A connecting cavity (103) is formed at the intersection of the connecting nut (101) of the Y-shaped valve body (1) and the two connecting pipes (102), and a pressure sensor is provided in the connecting cavity (103).

7. The gas over-flow cut-off double-mouth valve according to claim 1, characterized in that: A connecting cavity (103) is formed at the intersection of the connecting nut (101) of the Y-shaped valve body (1) and the two connecting pipes (102), and a partition (4) is provided in the connecting cavity (103).

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