Pressure gauge protection device and double-gauge valve
By designing an isolation device in the dual meter valve to induce and automatically cut off high-pressure overload, the problem that the low-pressure gauge is easily damaged during the refrigerant filling of the dual meter valve is solved, and the safe and normal operation of the equipment is achieved.
Patent Information
- Application Number
- CN202421331762.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing dual-meter valves are prone to damage the low-pressure gauge due to high pressure during refrigerant filling, resulting in equipment damage.
A pressure gauge protection device is designed, including an isolation device, which induces the airflow pressure through the high-pressure sampling channel and the low-pressure sampling channel, and automatically cuts off the low-pressure sampling channel of the low-pressure gauge to protect it from being damaged by excessive pressure.
It effectively protects the low-pressure gauge from being damaged by excessively high airflow pressure, ensures the normal use of the equipment, and reduces the need for manual control through automated processes, and is compact in structure and easy to use.
Smart Images
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of flow control devices, and in particular to a pressure gauge protection device and a double gauge valve. Background Art
[0002] The double gauge valve is an important device used in the inspection, maintenance and refrigerant filling process of refrigeration equipment. It is used to measure the pressure of the refrigeration system or various refrigeration systems inside the equipment, and can achieve appropriate refrigerant replenishment through it.
[0003] However, the existing double-gauge valve has the following defects: during the process of charging the double-gauge valve with refrigerant, due to various reasons such as operating errors, the low-pressure gauge in the double-gauge valve is easily damaged by the high pressure in the system, resulting in damage to the double-gauge valve. Summary of the invention
[0004] One object of the present application is to provide a pressure gauge protection device and a double gauge valve capable of protecting a pressure gauge.
[0005] In order to achieve the above purpose, the technical solution adopted in the present application is: a pressure gauge protection device, including a device body, a high-pressure sampling channel, a low-pressure sampling channel and a connecting channel are opened inside the device body, the high-pressure sampling channel is connected to the connecting channel, and the low-pressure sampling channel is connected to the connecting channel. An isolation device is arranged in the device body, and the isolation device is located between the first end and the second end of the low-pressure sampling channel. The isolation device is suitable for operating between the first end and the second end according to the change of the intake pressure of the first end, and opening the second end so that the first end and the second end are connected, or closing the second end so that the first end and the second end are separated.
[0006] In some embodiments, the isolation device includes an elastomer and a piston, wherein the elastomer is connected to the piston, and the elastomer is suitable for enabling the piston to overcome a portion of the intake pressure of the first end to operate, thereby connecting the first end and the second end.
[0007] In some embodiments, the piston includes a connecting section and a blocking section, the connecting section is suitable for opening the second end, the blocking section is suitable for closing the second end, and the elastomer is suitable for at least allowing the connecting section and the blocking section to move and switch at the opening of the second end.
[0008] In some embodiments, the isolation device also includes a regulator, which is movably arranged on the device body, and the regulator and the piston are respectively located on both sides of the elastomer. The regulator is suitable for changing the maximum movable distance between the regulator and the piston, thereby adjusting the magnitude of the force applied by the elastomer to the piston.
[0009] In some embodiments, the elastic body enables the upper limit of the intake pressure of the piston overcoming the first end to be no more than 90% of the maximum limit of the low-pressure gauge.
[0010] In some embodiments, the elastic body enables the piston to overcome an upper limit of the intake pressure at the first end that is not less than 80% of a maximum limit of a low-pressure gauge.
[0011] In some embodiments, the low-pressure sampling channel is provided with a first sampling hole near the first end, and the low-pressure sampling channel is provided with a second sampling hole near the second end, and the first sampling hole and the second sampling hole are staggered along the movement direction of the isolation device.
[0012] In some embodiments, the distance between the first sampling hole and the second sampling hole in the moving direction of the isolation device is not less than the connecting length of the connecting section in the moving direction of the isolation device.
[0013] In some embodiments, a valve core is disposed in the low-pressure sampling channel, and the isolation device is located between the valve core and the second end.
[0014] A double-gauge valve comprises any one of the pressure gauge protection devices described above.
[0015] Compared with the prior art, the beneficial effect of the present application is that the pressure gauge protection device and double-gauge valve of the present application can sense the air flow pressure entering the low-pressure pressure gauge by setting an isolation device, and can cut off the low-pressure sampling channel of the low-pressure gauge when the system high pressure enters the low-pressure measurement system of the low-pressure pressure gauge, causing the air flow pressure to be too high, thereby protecting the low-pressure gauge from being damaged by the excessive air flow pressure. When the air flow pressure in the low-pressure sampling channel returns to normal, the isolation device can automatically open to enable the low-pressure pressure gauge to operate normally, thereby ensuring the normal use of the entire equipment, without the need for manual control, with a compact structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of a double-meter valve according to a preferred embodiment of the present application.
[0017] Figure 2 It is a structural schematic diagram of an isolation device according to a preferred embodiment of the present application when the second end of the low-pressure sampling channel is opened.
[0018] Figure 3 It is a structural schematic diagram of the isolation device according to a preferred embodiment of the present application when the second end of the low-pressure sampling channel is closed.
[0019] Figure 4 It is a piping diagram of a double-meter valve and a refrigeration system according to a preferred embodiment of the present application.
[0020] In the figure: 1. device body; 11. high-pressure sampling channel; 12. low-pressure sampling channel; 121. first sampling hole; 122. second sampling hole; 13. connecting channel; 131. connecting end; 14. first end; 15. second end; 2. isolating device; 21. elastomer; 22. piston; 221. connecting section; 222. blocking section; 2221. sealing ring; 23. regulator; 3. valve core; 4. hand wheel; 5. high-pressure pressure gauge; 6. low-pressure pressure gauge; 7. hook. DETAILED DESCRIPTION
[0021] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0022] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.
[0023] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
[0024] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.
[0025] The present application is further described below with reference to the accompanying drawings:
[0026] like Figures 1 to 4As shown, the present application provides a pressure gauge protection device, including a device body 1, a high-pressure sampling channel 11, a low-pressure sampling channel 12 and a connecting channel 13 are opened inside the device body 1, the high-pressure sampling channel 11 is connected to the connecting channel 13, the second end 15 of the high-pressure sampling channel 11 is connected to the high-pressure pressure gauge 5, the first end 14 of the high-pressure sampling channel 11 is connected to the high-pressure interface of the refrigeration system, the low-pressure sampling channel 12 is connected to the connecting channel 13, the second end 15 of the low-pressure sampling channel 12 is connected to the low-pressure pressure gauge 6, the first end 14 of the low-pressure sampling channel 12 is connected to the low-pressure interface of the refrigeration system, and the connecting channel 13 is also provided with a connecting end 131, and the connecting end 131 is used to connect a refrigerant bottle.
[0027] An isolation device 2 is provided in the device body 1, and the isolation device 2 is located between the first end 14 and the second end 15 of the low-pressure sampling channel 12. The isolation device 2 is suitable for operating between the first end 14 of the low-pressure sampling channel 12 and the second end 15 of the low-pressure sampling channel 12 according to the change of the intake pressure of the first end 14 of the low-pressure sampling channel 12. When the intake pressure of the first end 14 of the low-pressure sampling channel 12 is within the set value range, the isolation device 2 can operate with the change of the intake pressure, but keep the second end 15 of the low-pressure sampling channel 12 open, so that the first end 14 of the low-pressure sampling channel 12 and the second end 15 of the low-pressure sampling channel 12 are connected. When the low-pressure sampling channel 12 When the intake pressure at the first end 14 exceeds the set value range, the isolation device 2 can operate with the change of the intake pressure, but will close the second end 15 of the low-pressure sampling channel 12, so that the first end 14 of the low-pressure sampling channel 12 and the second end 15 of the low-pressure sampling channel 12 are separated. Specifically, by associating the action stroke of the isolation device 2 with the change of the intake pressure of the low-pressure sampling channel 12, and setting the idle stroke according to the upper limit of the change of the intake pressure of the low-pressure sampling channel 12 and the upper limit of the load of the low-pressure pressure gauge 6, the isolation device 2 will not affect the normal operation of the low-pressure sampling channel 12 within the idle stroke, thereby avoiding the phenomenon of excessive air pressure damaging the low-pressure pressure gauge 6.
[0028] like Figure 2 and 3 In the illustrated embodiment, the isolation device 2 includes an elastomer 21 and a piston 22. The elastomer 21 is connected to the piston 22. The elastomer 21 is suitable for enabling the piston 22 to overcome the intake pressure of part of the first end 14 of the low-pressure sampling channel 12 to move, thereby connecting the first end 14 of the low-pressure sampling channel 12 and the second end 15 of the low-pressure sampling channel 12. When the intake pressure of the first end 14 of the low-pressure sampling channel 12 gradually increases, the elastomer 21 will no longer be able to continue to maintain the state of the piston 22, and the piston 22 will move. When the piston 22 moves beyond a certain range, the first end 14 of the low-pressure sampling channel 12 and the second end 15 of the low-pressure sampling channel 12 will be blocked by the piston 22.
[0029] In some embodiments, the elastic body 21 is preferably a spring, and the elastic force of the spring is used to push the piston 22 to move.
[0030] like Figure 2 and 3 In the illustrated embodiment, the piston 22 includes a connecting section 221 and a blocking section 222, the connecting section 221 is suitable for opening the second end 15 of the low-pressure sampling channel 12, the blocking section 222 is suitable for closing the second end 15 of the low-pressure sampling channel 12, and the elastomer 21 is suitable for at least allowing the connecting section 221 and the blocking section 222 to move and switch at the opening of the second end 15 of the low-pressure sampling channel 12.
[0031] In some embodiments, the connecting section 221 may be a columnar body having a diameter slightly smaller than the movable space of the piston 22 , and the gap between the connecting section 221 and the movable space of the piston 22 may be used to achieve gas communication.
[0032] In some embodiments, the cross-section of the blocking section 222 can be set to be the same as the cross-section of the movable space of the piston 22, so as to achieve the closure of the side wall of the movable space of the piston 22.
[0033] In some embodiments, a sealing ring 2221 is provided on the blocking section 222 to enhance the airflow blocking capability of the blocking section 222 .
[0034] In some embodiments, the isolation device 2 also includes a regulator 23, which is movably arranged on the device body 1. The regulator 23 and the piston 22 are respectively located on both sides of the elastomer 21. The regulator 23 is suitable for changing the maximum movable distance between the regulator 23 and the piston 22, thereby adjusting the magnitude of the force applied by the elastomer 21 to the piston 22, which directly determines how much intake pressure the piston 22 can be pushed. The larger the maximum movable distance between the regulator 23 and the piston 22, the smaller the intake pressure that the piston 22 can be pushed, so that the upper limit of the air pressure entering the low-pressure pressure gauge 6 can be lower, and the better the protection effect.
[0035] In some embodiments, the regulator 23 preferably uses a screw plug, which is set on the device body 1 through a threaded connection. The structure is stable and not easy to slide loose.
[0036] In some embodiments, the elastic body 21 enables the piston 22 to overcome the upper limit of the intake pressure of the first end 14 of the low-pressure sampling channel 12 to not exceed 90% of the maximum limit of the low-pressure pressure gauge 6, ensuring that the low-pressure pressure gauge 6 will not be damaged by excessive air pressure.
[0037] In some embodiments, the elastomer 21 enables the piston 22 to overcome the upper limit of the intake pressure of the first end 14 of the low-pressure sampling channel 12, which is not less than 80% of the maximum limit of the low-pressure pressure gauge 6, thereby ensuring the measurement capacity range of the low-pressure pressure gauge 6 for normal use and avoiding limitation due to a too small measurement range.
[0038] In some embodiments, the elastic body 21 enables the piston 22 to overcome the upper limit of the intake pressure of the first end 14 of the low-pressure sampling channel 12 to be between 85% and 90% of the maximum limit of the low-pressure pressure gauge 6 .
[0039] like Figure 2 and 3 In the illustrated embodiment, the low-pressure sampling channel 12 is provided with a first sampling hole 121 near the first end 14, and the low-pressure sampling channel 12 is provided with a second sampling hole 122 near the second end 15. The first sampling hole 121 and the second sampling hole 122 are staggered along the movement direction of the isolation device 2. The piston 22 can achieve protection by controlling the opening and closing of the first sampling hole 121 and the second sampling hole 122. Specifically, when the blocking section 222 is active, it needs to pass through the second sampling hole 122 after the connecting section 221 and not through the first sampling hole 121, so as to ensure the sensing of the intake pressure.
[0040] In some embodiments, the spacing between the first sampling hole 121 and the second sampling hole 122 in the movement direction of the isolation device 2 is not less than the connection length of the connecting section 221 in the movement direction of the isolation device 2, ensuring that the connecting section 221 can simultaneously connect the first sampling hole 121 and the second sampling hole 122 within at least a certain stroke, thereby ensuring that the device can be used normally.
[0041] like Figure 2 and 3 In the illustrated embodiment, a valve core 3 is disposed in the low-pressure sampling channel 12 , and the isolation device 2 is located between the valve core 3 and the second end 15 of the low-pressure sampling channel 12 for controlling the opening and closing of the low-pressure sampling channel 12 .
[0042] like Figure 2 and 3 In the illustrated embodiment, a valve core 3 is provided in the high pressure sampling channel 11 for controlling the opening and closing of the high pressure sampling channel 11 .
[0043] like Figure 1 In the illustrated embodiment, the valve cores 3 in the low-pressure sampling channel 12 and the high-pressure sampling channel 11 are both connected to a handwheel 4 , through which the flow rates of the low-pressure sampling channel 12 and the high-pressure sampling channel 11 can be controlled.
[0044] like Figure 1 and 4 As shown, the present application also provides a double-gauge valve, comprising the pressure gauge protection device of any of the above embodiments.
[0045] like Figure 1 In the illustrated embodiment, a hook 7 is provided on the double-gauge valve between the high-pressure gauge 5 and the low-pressure gauge 6 to facilitate hanging the double-gauge valve.
[0046] like Figure 4 In the embodiment shown, in actual application, the various interfaces are connected, the first end 14 of the low-pressure sampling channel 12 is connected to the low-pressure interface of the refrigeration system, the first end 14 of the high-pressure sampling channel 11 is connected to the high-pressure interface of the refrigeration system, and the connecting end 131 is connected to the refrigerant bottle. The opening and closing of the low-pressure sampling channel 12 and the high-pressure sampling channel 11 are achieved by controlling the valve core 3 through the hand wheel 4, and the connection between the connecting end 131 and the refrigerant bottle is achieved through the bottle valve provided by the refrigerant bottle.
[0047] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.
Claims
1. A pressure gauge protection device, characterized in that: The device body comprises a device body, wherein a high-pressure sampling channel, a low-pressure sampling channel and a connecting channel are provided inside the device body, wherein the high-pressure sampling channel is connected to the connecting channel, and the low-pressure sampling channel is connected to the connecting channel, and an isolation device is provided inside the device body, wherein the isolation device is located between the first end and the second end of the low-pressure sampling channel, and wherein the isolation device is suitable for operating between the first end and the second end according to the change of the intake pressure of the first end, and opening the second end so that the first end and the second end are connected, or closing the second end so that the first end and the second end are isolated.
2. A pressure gauge protection device according to claim 1, characterized in that: The isolation device includes an elastic body and a piston. The elastic body is connected to the piston. The elastic body is suitable for enabling the piston to overcome a portion of the intake pressure of the first end to operate, thereby connecting the first end and the second end.
3. A pressure gauge protection device as claimed in claim 2, characterized in that: The piston comprises a connecting section and a blocking section, wherein the connecting section is adapted to open the second end, and the blocking section is adapted to close the second end, and the elastic body is adapted to at least enable the connecting section and the blocking section to move and switch at the opening of the second end.
4. A pressure gauge protection device as claimed in claim 2, characterized in that: The isolation device also includes a regulator, which is movably arranged on the device body. The regulator and the piston are respectively located on both sides of the elastomer. The regulator is suitable for changing the maximum movable distance between the regulator and the piston, thereby adjusting the magnitude of the force applied by the elastomer to the piston.
5. A pressure gauge protection device as claimed in claim 2, characterized in that: The elastic body enables the upper limit of the intake pressure of the piston overcoming the first end to not exceed 90% of the maximum limit of the low-pressure pressure gauge.
6. A pressure gauge protection device as claimed in claim 5, characterized in that: The elastic body enables the piston to overcome the upper limit of the intake pressure of the first end to be no less than 80% of the maximum limit of the low-pressure pressure gauge.
7. A pressure gauge protection device according to claim 1, characterized in that: The low-pressure sampling channel is provided with a first sampling hole near the first end, and the low-pressure sampling channel is provided with a second sampling hole near the second end. The first sampling hole and the second sampling hole are staggered along the action direction of the isolation device.
8. A pressure gauge protection device according to claim 7, characterized in that: The distance between the first sampling hole and the second sampling hole in the moving direction of the isolation device is not less than the connecting length of the connecting section in the moving direction of the isolation device.
9. A pressure gauge protection device according to claim 1, characterized in that: A valve core is arranged in the low-pressure sampling channel, and the isolation device is located between the valve core and the second end.
10. A double meter valve, characterized in that: The invention comprises the pressure gauge protection device as claimed in any one of claims 1 to 9.