Safety valve with built-in pressure indicator

Abstract

The utility model relates to the technical field of high-pressure steam safety valves, in particular to a safety valve with a built-in pressure indicator. A safety valve with built-in pressure indication comprises a safety valve body with a pressure relief structure and a handle cover sleeved outside the valve body, a pressure gauge is arranged at the top of the handle cover, the pressure gauge is communicated with a gas outlet port of the valve body, and high-pressure gas flows to the pressure gauge through an internal channel of the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, and more specifically, to a safety valve with built-in pressure indication. Background Art

[0002] A safety valve is a special valve in which the closing member is normally in a closed state under the action of an external force. When the pressure of the medium in the equipment or pipeline rises above the specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or equipment from exceeding the specified value. The safety valve belongs to the category of automatic valves and is mainly used on boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, playing an important role in protecting personal safety and equipment operation. Note that the safety valve must be pressure-tested before use.

[0003] Most of the safety valves on the market currently do not have pressure indication. Users do not know the steam pressure value inside the machine clearly. Many customers hope to have a safety valve that can display the steam pressure value inside the machine, which is more convenient for users to use. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a safety valve with pressure display.

[0005] To achieve the above purpose, the utility model provides the following technical solutions, mainly including:

[0006] A safety valve with built-in pressure indication, which includes a safety valve body with a pressure relief structure and a handle cover sleeved outside the valve body. A pressure gauge is arranged on the top of the handle cover, and the pressure gauge is communicated with the air outlet port of the valve body. High-pressure gas flows through the internal channel of the valve body to the pressure gauge.

[0007] Preferably, a groove for embedding the pressure gauge is arranged on the top of the handle cover, and after installation, the top surface of the pressure gauge is flush with the top of the handle cover.

[0008] Preferably, the pressure gauge is a circular pressure gauge, and the pressure gauge is connected to the handle cover by threads, and a channel hole is arranged inside the thread connection.

[0009] Preferably, a movable valve core is arranged inside the valve body, and a valve core thimble is installed inside the movable valve core. The valve body, the movable valve core and the valve core thimble are arranged on the same central axis, and a gas flow hole is arranged inside; the valve core thimble is divided into three parts. The top end is arranged inside the channel hole and moves up and down along the channel hole; the middle end is provided with a stepped shaft, and a ratchet ring is sleeved through the stepped shaft; the bottom end is the valve core end, and the valve core end moves inside the upper and lower valve cores, and a valve core end stepped shaft is arranged. After the valve core end moves the maximum stroke inside the valve core, the stepped shaft drives the movable valve core to move up and down.

[0010] Preferably, ratchet ribs are provided on both sides of the top of the valve body. Under normal conditions, the ratchet ring is sleeved outside the ratchet ribs, and the ratchet ring engages with the ratchet ribs to drive the valve body to rotate; when the pressure rises, the valve core thimble drives the ratchet ring to move upward, the ratchet ring disengages from the ratchet ribs, and the ratchet ring idles.

[0011] Preferably, a pressure relief spring is provided outside the movable valve core, and a valve core nut is provided at the top of the pressure relief spring. The valve core nut is threadedly connected to the valve body.

[0012] Preferably, a return spring is further provided at the top of the ratchet ring for the return of the ratchet ring.

[0013] Preferably, the pressure gauge is a pressure gauge with an involute spring. High-pressure gas directly drives the involute spring inside the pressure gauge to drive the pointer of the dial to rotate to indicate the corresponding pressure value.

[0014] Preferably, sealing rings are installed at the gas connection points, including a valve body sealing ring, a valve core thimble sealing ring, and a pressure gauge sealing ring.

[0015] Through the above technical solutions, compared with the prior art, the present utility model integrates a pressure indicating gauge on the safety valve, and the present invention solves the problem that the users of the existing high-pressure steam cleaners cannot know the internal steam pressure value. The user can directly read the pressure value, which not only improves the operability of the equipment, but also increases the user's control ability over the equipment, thereby enhancing the safety and accuracy of use;

[0016] When steam is generated inside the machine, the steam drives the valve core thimble to drive the ratchet ring of the safety valve to move upward, automatically disengaging from the ratchet of the valve body, so that the safety valve handle cover is in an idling state. This design effectively prevents potential safety hazards caused by misoperation when steam exists, such as the risk of scalding caused by steam leakage;

[0017] When the steam is sprayed out, the ratchet ring of the safety valve automatically returns to the initial position under the action of the return spring and re-engages with the ratchet of the valve body, prompting the user that the steam has been sprayed out and the safety valve handle cover can be safely opened for operation. This function not only improves the convenience of equipment use, but also further enhances the user's safe operation experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0019] Figure 1This is the external structure schematic diagram of the present utility model.

[0020] Figure 2 This is the bottom view structure schematic diagram of the present utility model.

[0021] Figure 3 This is the structure schematic diagram of the present utility model when there is steam.

[0022] Figure 4 This is the structure schematic diagram of the present utility model when there is no steam.

[0023] Explanation of reference numerals: valve body 1, safety valve sealing ring 2, handle cover 3, pressing plate 4, movable valve core sealing sleeve 5, valve core thimble sealing ring 6, valve core thimble 7, movable valve core 8, pressure relief spring 9, valve core nut 10, ratchet ring 11, return spring 12, pressure gauge sealing ring 13, pressure gauge 14. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment

[0026] A safety valve with built-in pressure indication includes a safety valve body 1 with a pressure relief structure, and a handle cover 3 sleeved outside the valve body. This safety valve has a unique design. A pressure gauge 14 is provided on the top of the handle cover 3, and the pressure gauge 14 is communicated with the air outlet port of the valve body 1. When high-pressure gas passes through the valve body 1, it directly flows to the pressure gauge 14 through the internal channel. Through this design, users can read the pressure situation inside the device in real time.

[0027] To optimize the operation experience, a groove is designed on the top of the handle cover 3 for inlaying the pressure gauge 14. After installation, the top surface of the pressure gauge 14 is flush with the top of the handle cover 3, which not only ensures the stability of the pressure gauge 14, but also makes the overall structure more compact and beautiful. At the same time, the pressure gauge 14 is of a circular structure and is fixed to the handle cover 3 by threaded connection. A channel hole is provided at the threaded connection to allow gas to flow smoothly to the pressure gauge 14, driving the involute spring inside it to display the current pressure value.

[0028] Inside the valve body 1, a movable valve core 8 is provided. Inside the movable valve core 8, a valve core thimble 7 is installed. The entire assembly is arranged along the same central axis. A gas flow hole is provided inside the valve core thimble 7 for the conduction of high-pressure gas. The valve core thimble 7 is divided into three parts. The top part is arranged inside the channel hole and moves up and down along the channel hole. The middle part is designed as a stepped shaft and is connected to the sleeved ratchet ring 11. The ratchet ring 11 drives the valve body 1 to rotate through the stepped shaft. The bottom end of the valve core thimble 7 is the valve core end and can move up and down inside the movable valve core 8. When the valve core thimble 7 moves to the maximum stroke, the stepped shaft drives the movable valve core 8 to move together to achieve the regulation of gas pressure.

[0029] On both sides of the top end of the valve body 1, ratchet ribs are provided. In the normal state, the ratchet ring 11 meshes with the ratchet ribs to ensure the normal rotation of the valve body 1. When the internal pressure rises, the valve core thimble 7 will push the ratchet ring 11 to move upward, causing the ratchet ring 11 to disengage from the ratchet ribs. At this time, the ratchet ring 11 is in an idle rotation state, avoiding steam leakage accidents caused by misoperation.

[0030] To ensure recovery after pressure release, a pressure relief spring 9 is installed outside the movable valve core 8. The top end of the pressure relief spring 9 is connected to the valve core nut 10. The valve core nut 10 is threadedly connected to the valve body 1 to ensure the structural stability. In addition, a return spring 12 is also installed on the top of the ratchet ring 11 to ensure that the ratchet ring 11 automatically resets after the pressure drops and meshes with the ratchet ribs again to ensure the safety of operation.

[0031] The pressure gauge 14 used in this safety valve is a pressure gauge 14 with an involute spring. When high-pressure gas passes through, it directly drives the involute spring inside the pressure gauge 14 to drive the pointer to rotate and accurately indicate the current pressure value. To ensure the gas tightness, multiple sealing rings are installed at key parts, including the valve body sealing ring 2, the valve core thimble sealing ring 6, and the pressure gauge sealing ring 13, to ensure the efficient sealing and safe operation of the system during operation.

[0032] The structure of this safety valve not only effectively solves the problem of no pressure indication in the prior art, but also optimizes the safety and reliability of operation through a series of designs.

[0033] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts between the embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety valve with built-in pressure indication, comprising a safety valve body with a pressure relief structure, and a handle cover sleeved on the outside of the valve body, characterized in that: A pressure gauge is arranged on the top of the handle cover, and the pressure gauge is communicated with the gas outlet port of the valve body, and the high-pressure gas flows to the pressure gauge through the internal channel of the valve body.

2. A safety valve with built-in pressure indication according to claim 1, characterized in that: The top of the handle cover is provided with a groove for embedding the pressure gauge, and after installation, the top surface of the pressure gauge is flush with the top of the handle cover.

3. A safety valve with built-in pressure indication according to claim 2, characterized in that: The pressure gauge is a circular pressure gauge, and the pressure gauge is connected to the handle cover via threads, and a channel hole is provided inside the threaded connection.

4. A safety valve with built-in pressure indication according to claim 3, characterized in that: A movable valve core is provided in the valve body, and a valve core ejector is installed in the movable valve core. The valve body, movable valve core and valve core ejector are arranged on the same central axis, and a gas circulation hole is provided inside. The valve core ejector is divided into three parts, the top end is arranged in the channel hole, and moves up and down along the channel hole; the middle end is provided with a stepped shaft, and the ratchet ring is connected through the stepped shaft; the bottom end is the valve core end, the valve core end moves in the upper and lower valve cores, and a valve core end stepped shaft is provided. After the valve core end moves the maximum stroke in the valve core, the stepped shaft drives the movable valve core to move up and down.

5. A safety valve with built-in pressure indication according to claim 4, characterized in that: Ratchet ribs are provided on both sides of the top of the valve body. Under normal conditions, the outside of the ratchet rib is sleeved with the ratchet ring, and the ratchet ring and the ratchet rib are meshed to drive the valve body to rotate; when the pressure rises, the valve core ejector pin drives the ratchet ring to move upward, the ratchet ring is separated from the ratchet rib, and the ratchet ring rotates idly.

6. A safety valve with built-in pressure indication according to claim 5, characterized in that: A pressure relief spring is arranged outside the movable valve core, a valve core nut is arranged on the top of the pressure relief spring, and the valve core nut is threadedly connected with the valve body.

7. A safety valve with built-in pressure indication according to claim 4, characterized in that: A reset spring is also provided on the top of the ratchet ring for resetting the ratchet ring.

8. A safety valve with built-in pressure indication according to any one of claims 1 to 6, characterized in that: The pressure gauge is a pressure gauge with an involute spring. The high-pressure gas directly drives the involute spring in the pressure gauge to drive the pointer of the dial to rotate to indicate the corresponding pressure value.

9. A safety valve with built-in pressure indication according to any one of claims 1 to 7, characterized in that: Sealing rings are installed at the gas connection points, including valve body sealing rings, valve core ejector needle sealing rings, and pressure gauge sealing rings.

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