Pneumatic valve and water supply valve

Abstract

The utility model discloses a pneumatic valve and a water supply valve, which belong to the field of valves, are used for solving the problem that the opening and closing of the existing valve are delayed, and comprise a valve seat, a liquid path joint, a gas path joint, a piston, a valve rod and an elastic piece, the liquid path joint is provided with a hydraulic channel; the gas circuit connector is provided with a piston cavity, a valve rod cavity, a gas pressure channel and an auxiliary channel. The piston is arranged in the piston cavity in a sliding mode and divides the piston cavity into a first cavity and a second cavity, the first cavity is communicated with the hydraulic channel, and the second cavity is communicated with the valve rod cavity and the auxiliary channel; the valve rod is movably arranged in the valve rod cavity, one end of the valve rod faces the piston, and a plug is arranged at the other end of the valve rod. The elastic piece is arranged between the gas circuit connector and the valve rod and used for driving the valve rod to move in the direction of closing the opening; an airtight piece is arranged between the valve rod and the cavity wall of the valve rod cavity so as to separate the valve rod cavity and the second cavity, and the auxiliary channel is connected with a vacuumizing device.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a pneumatic valve and a water supply valve. Background Art

[0002] Pneumatic valves play a vital role in industrial automation control systems. However, existing pneumatic valves suffer from delays in opening and closing. This delay occurs when the valve core, after receiving a control signal, takes longer than expected or specified to fully open or close from its fully open or closed state. This delay can lead to unresponsive control systems, impacting production efficiency and product quality.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0004] (1) Technical problems solved

[0005] The utility model provides a pneumatic valve and a water supply valve, which at least solve the technical problem of how to reduce the opening and closing delay of the pneumatic valve.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A pneumatic valve comprises: a valve seat, a liquid line connector, a gas line connector, a piston, a valve stem and an elastic member;

[0009] The fluid path joint is sealed and connected to the valve seat, and is internally provided with a hydraulic channel connected to a hydraulic source;

[0010] The air circuit joint is sealed with the valve seat and is internally provided with a piston chamber, a valve stem chamber, an air pressure channel and an auxiliary channel. The valve stem chamber is provided with an opening communicating with the outside of the air circuit joint. The air pressure channel is in communication with the valve stem chamber and is used to input air pressure into the valve stem chamber.

[0011] The piston is slidably disposed in the piston cavity and divides the piston cavity into a first chamber and a second chamber, wherein the first chamber is communicated with the hydraulic channel, and the second chamber is communicated with the valve stem cavity and the auxiliary channel;

[0012] The valve stem is movably disposed in the valve stem cavity, with one end facing the piston and the other end provided with a plug, wherein the plug is configured to close the opening in an initial state and open the opening when the valve stem moves;

[0013] The elastic member is provided between the gas path connector and the valve stem, and is used to drive the valve stem to move in the direction of closing the opening;

[0014] Wherein, an airtight member is provided between the valve stem and the wall of the valve stem cavity to separate the valve stem cavity and the second cavity, and the auxiliary channel is used to connect a vacuum device.

[0015] In some embodiments, the auxiliary channel is located on a side of the second chamber opposite to the piston.

[0016] In some embodiments, the end of the valve stem close to the piston is threadedly connected to two limiting rings, the air-sealing part is sleeved on the periphery of the valve stem and fixed between the two limiting rings, and the outer surface of the air-sealing part is in movably sealed contact with the wall of the valve stem cavity.

[0017] In some embodiments, the elastic member is a compression spring, the air circuit connector is provided with a limiting step on the inner side of the valve stem cavity, the compression spring is sleeved on the periphery of the valve stem, and its two ends respectively abut against a limiting ring and the limiting step.

[0018] In some embodiments, a retaining ring is fixedly provided on the valve stem on a side of the limiting step close to the plug. In an initial state, the retaining ring contacts the limiting step to limit the movement of the valve stem toward the piston.

[0019] In some embodiments, the plug includes a buffer portion extending to the periphery of the opening, the buffer portion is made of elastic material, and contacts the gas path connector when the plug closes the opening.

[0020] In some embodiments, the valve seat is provided with a sleeve cavity, both ends of which are connected to the outside; the liquid path connector is sealingly sleeved at one end of the sleeve cavity, and the gas path connector is sealingly sleeved at the other end of the sleeve cavity.

[0021] The utility model also provides a water supply valve, comprising any one of the above-mentioned pneumatic valves.

[0022] (3) Beneficial effects

[0023] Compared with the prior art, the pneumatic valve and water supply valve provided by the utility model have the following beneficial effects:

[0024] Improved starting speed: The hydraulic power is provided by the hydraulic source, and the negative pressure environment formed by the vacuum pumping effect of the auxiliary channel accelerates the speed of the piston moving toward the valve stem. The auxiliary air pressure of the air pressure channel pushes the valve stem to move faster, thereby improving the starting response speed of the pneumatic valve and effectively shortening the time from the initial state to full opening.

[0025] Improved closing speed: During the closing process of the pneumatic valve, by eliminating hydraulic power and leveraging the action of external actuators and the driving force of elastic parts, the valve stem can quickly and smoothly move toward the piston and return to its initial position. This process not only optimizes the smoothness of the closing action, but also significantly improves the closing speed of the pneumatic valve, ensuring rapid response and efficient operation of the system.

[0026] It can be seen that the pneumatic valve of the present invention can reduce the delay when opening and closing the pneumatic valve, and improve the working efficiency of the pneumatic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the pneumatic valve when it is opened in the embodiment.

[0028] Figure 2 It is a cross-sectional view of the pneumatic valve when it is closed in the embodiment.

[0029] Reference numerals:

[0030] Valve seat 1, sleeve cavity 10;

[0031] Liquid circuit connector 2, hydraulic channel 20;

[0032] Air circuit connector 3, piston chamber 31, valve stem chamber 32, air pressure channel 33, auxiliary channel 34, limit step 35, opening 300, first chamber 301, second chamber 302;

[0033] Piston 4, valve stem 5, airtight part 50, plug 51, limit ring 52, retaining ring 53;

[0034] Elastic member 6; hydraulic source 7; air pressure source 8; vacuum device 9. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] Existing pneumatic valves have the problem of opening and closing delays.

[0037] In order to solve the above technical problems, this embodiment provides a pneumatic valve, please refer to Figure 1 and Figure 2 As shown, Figure 1 This is a cross-sectional view of the pneumatic valve when it is opened in the embodiment. Figure 2 It is a cross-sectional view of the pneumatic valve when it is closed in the embodiment.

[0038] The pneumatic valve of this embodiment includes: a valve seat 1 , a liquid circuit connector 2 , a gas circuit connector 3 , a piston 4 , a valve stem 5 and an elastic member 6 .

[0039] The fluid path connector 2 is sealedly connected to the valve seat 1 , and a hydraulic channel 20 connected to the hydraulic source 7 is provided inside the fluid path connector 2 , and the hydraulic channel 20 is connected to the hydraulic source 7 .

[0040] The air circuit connector 3 is sealed and connected to the valve seat 1, and is internally provided with a piston chamber 31, a valve stem chamber 32, an air pressure channel 33 and an auxiliary channel 34. The piston chamber 31 is used to install the piston 4, the valve stem chamber 32 is used to install the valve stem 5, and is provided with an opening 300 connected to the outside of the air circuit connector 3. The air pressure channel 33 is connected to the valve stem chamber 32, and air pressure is provided by the air pressure source 8, and is used to input air pressure into the valve stem chamber 32.

[0041] The piston 4 is slidably disposed in the piston chamber 31 and divides the piston chamber 31 into a first chamber 301 and a second chamber 302. The first chamber 301 is connected to the hydraulic channel 20, and the second chamber 302 is connected to the valve stem chamber 32 and the auxiliary channel 34. The auxiliary channel 34 is used to connect the vacuum device 9, and the second chamber 302 is vacuumed by the vacuum device 9.

[0042] The valve stem 5 is movably disposed in the valve stem cavity 32, with one end facing the piston 4 and the other end provided with a plug 51. The plug 51 is configured to close the opening 300 in the initial state and open the opening 300 when the valve stem 5 moves. An airtight part 50 is provided between the valve stem 5 and the wall of the valve stem cavity 32 to separate the valve stem cavity 32 and the second chamber 302.

[0043] The elastic member 6 is provided between the gas line connector 3 and the valve stem 5 , and is used to drive the valve stem 5 to move in a direction of closing the opening 300 .

[0044] When the pneumatic valve of the above technical solution is in operation, the hydraulic source 7 increases the hydraulic power for the first chamber 301 through the hydraulic channel 20, pushing the piston 4 toward the second chamber 302. Subsequently, the piston 4 pushes the valve stem 5 toward the opening 300, causing the plug 51 to open the opening 300. During this process, the air pressure channel 33 inputs air pressure into the valve stem chamber 32, which can assist in pushing the plug 51 against the elastic force of the elastic member 6 to open the opening 300. After the opening 300 is opened, the air pressure is output to the outside of the opening 300. At the same time, the auxiliary channel 34 can also evacuate the second chamber 302 through the vacuum device 9, thereby accelerating the speed of the piston 4 moving toward the valve stem 5 under negative pressure and reducing the pneumatic valve startup delay. When the pneumatic valve is closed, the hydraulic power is canceled, and the valve stem 5 can move toward the piston 4 under the action of the external actuator until it returns to its initial position. During this process, the elastic member 6 drives the valve stem 5 to return, thereby increasing the closing speed of the pneumatic valve.

[0045] Exemplarily, the plug 51 is fixed to the end of the valve stem 5 by bonding or bolts.

[0046] In order to ensure that the piston 4 can be subjected to negative pressure within its moving stroke when the auxiliary channel 34 evacuates the second chamber 302 , the auxiliary channel 34 is located on the side of the second chamber 302 opposite to the piston 4 .

[0047] In one embodiment of the above-mentioned arrangement of an airtight member 50 between the valve stem 5 and the wall of the valve stem cavity 32, the end of the valve stem 5 proximal to the piston 4 is threadedly connected to two retaining rings 52. The airtight member 50 is annular and sleeved around the periphery of the valve stem 5 and secured between the two retaining rings 52. In other words, the two retaining rings 52 securely lock the airtight member 50 to the valve stem 5, while the outer surface of the airtight member 50 is in movable, sealing contact with the circular wall of the valve stem cavity 32. This arrangement allows the airtight member 50 to move with the valve stem 5 and maintain a sealing effect during movement, preventing the air pressure in the air pressure passage 33 from flowing into the piston cavity 31.

[0048] Exemplarily, the airtight member 50 is a sealing ring made of rubber.

[0049] In one embodiment, the elastic member 6 is disposed between the gas connector 3 and the valve stem 5. The elastic member 6 is a compression spring. A stopper step 35 is fixedly provided inside the valve stem cavity 32 of the gas connector 3. The compression spring is sleeved around the valve stem 5, with its ends resting on a stopper ring 52 and the stopper step 35, respectively. When the plug 51 opens the opening 300, the compression spring compresses. When the opening 300 is closed, the stopper step 35 serves as support, and the spring force drives the valve stem 5 back into its original position.

[0050] In another embodiment in which the elastic member 6 is disposed between the air circuit connector 3 and the valve stem 5 , the elastic member 6 is a tension spring, both ends of which are respectively connected to the valve stem 5 and the air circuit connector 3 , and the elastic force generated by stretching drives the valve stem 5 to reset.

[0051] In order to limit the maximum movement stroke of the valve stem 5, the plug 51 is protected from overpressure to prevent the plug 51 from being crushed by the actuator, a retaining ring 53 is fixedly provided on the valve stem 5 on the side of the limit step 35 close to the plug 51. In the initial state, the retaining ring 53 contacts the limit step 35 to limit the movement of the valve stem 5 toward the piston 4.

[0052] In order to reduce vibration when the plug 51 closes the opening 300 , the plug 51 includes a buffer portion extending to the periphery of the opening 300 . The buffer portion is made of elastic material and contacts the gas line connector 3 when the plug 51 closes the opening 300 .

[0053] In one embodiment of the above-mentioned liquid circuit connector 2 and gas circuit connector 3 being sealedly connected to the valve seat 1, the valve seat 1 is provided with a sleeve cavity 10, both ends of which are connected to the outside; the liquid circuit connector 2 is sealedly sleeved at one end of the sleeve cavity 10, and the gas circuit connector 3 is sealedly sleeved at the other end of the sleeve cavity 10.

[0054] Exemplarily, a sealing ring is provided between the gas line connector 3 and the liquid line connector 2 and the inner side of the sleeve cavity 10 .

[0055] It is understandable that other air paths may be provided in the piston chamber 31 and the valve stem chamber 32 as required to balance and adjust the internal air pressure and ensure the normal operation of the control system where the pneumatic valve is located.

[0056] This embodiment provides a water supply valve, including the pneumatic valve of the above embodiment. It can be understood that the specific installation of the pneumatic valve in the water supply valve and the connection with other components of the water supply valve can refer to the existing technology and will not be repeated here.

[0057] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic valve, characterized in that: include: Valve seat, liquid connector, gas connector, piston, valve stem and elastic parts; The fluid path joint is sealed and connected to the valve seat, and is internally provided with a hydraulic channel connected to a hydraulic source; The air circuit joint is sealed with the valve seat and is internally provided with a piston chamber, a valve stem chamber, an air pressure channel and an auxiliary channel. The valve stem chamber is provided with an opening communicating with the outside of the air circuit joint. The air pressure channel is in communication with the valve stem chamber and is used to input air pressure into the valve stem chamber. The piston is slidably disposed in the piston cavity and divides the piston cavity into a first chamber and a second chamber, wherein the first chamber is communicated with the hydraulic channel, and the second chamber is communicated with the valve stem cavity and the auxiliary channel; The valve stem is movably disposed in the valve stem cavity, with one end facing the piston and the other end provided with a plug, wherein the plug is configured to close the opening in an initial state and open the opening when the valve stem moves; The elastic member is provided between the gas path connector and the valve stem, and is used to drive the valve stem to move in the direction of closing the opening; Wherein, an airtight member is provided between the valve stem and the wall of the valve stem cavity to separate the valve stem cavity and the second cavity, and the auxiliary channel is used to connect a vacuum device.

2. The pneumatic valve according to claim 1, characterized in that The auxiliary passage is located on a side of the second chamber opposite to the piston.

3. The pneumatic valve according to claim 1, characterized in that The end of the valve stem close to the piston is threadedly connected to two limiting rings. The airtight component is sleeved on the periphery of the valve stem and fixed between the two limiting rings. The outer surface of the airtight component is in movably sealed contact with the wall of the valve stem cavity.

4. The pneumatic valve according to claim 3, characterized in that: The elastic member is a compression spring, and the air path joint is provided with a limiting step on the inner side of the valve stem cavity. The compression spring is sleeved on the outer periphery of the valve stem, and its two ends respectively abut against a limiting ring and the limiting step.

5. The pneumatic valve according to claim 4, characterized in that: The valve stem is fixed with a retaining ring on the side of the limiting step close to the plug. In an initial state, the retaining ring contacts the limiting step to limit the movement of the valve stem toward the piston.

6. The pneumatic valve according to claim 1, characterized in that The plug includes a buffer portion extending to the periphery of the opening. The buffer portion is made of elastic material and contacts the gas path connector when the plug closes the opening.

7. The pneumatic valve according to claim 1, characterized in that The valve seat is provided with a sleeve cavity, and both ends of the sleeve cavity are communicated with the outside; the liquid path joint is sealingly sleeved at one end of the sleeve cavity, and the gas path joint is sealingly sleeved at the other end of the sleeve cavity.

8. A water supply valve, characterized in that: A pneumatic valve comprising the pneumatic valve according to any one of claims 1 to 7.

Images