A pneumatic control valve with good water-saving effect

Abstract

The utility model discloses a pneumatic control valve with good water-saving effect, comprising a valve body and a valve seat, wherein the valve seat is provided with a connected inlet channel and a discharge channel, wherein the valve seat is provided with a water-saving channel connected with the inlet channel and the discharge channel, the front side surface of the valve seat is threadedly connected with a diaphragm fixing block, a second diaphragm is sandwiched between the rear side surface of the diaphragm fixing block and the water-saving channel, the diaphragm fixing block is threadedly connected with a shaft body, the rear end of the shaft body is rotatably connected with a sealing block located in the water-saving channel, the rear side surface of the sealing block abuts against the second diaphragm, so that the second diaphragm and the water-saving channel are sealed and fitted; the utility model has the advantage of saving water.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic control valves and relates to a pneumatic control valve with good water-saving effect. Background Art

[0002] A pneumatic control valve is a device used to control the flow of a fluid (usually a gas or liquid). These valves regulate the flow, pressure, temperature or other parameters of the fluid by manipulating a pneumatic actuator. When making substances such as ultrapure water, completely closing the pneumatic control valve may cause bacteria to grow inside the valve body, so it is necessary to keep water flowing inside the valve body at all times.

[0003] The Chinese utility model patent with the authorization announcement number CN201526725U discloses a pneumatic control valve, including a valve seat, a valve body, a valve disc, and a return spring. The valve seat is fixedly connected to the valve body and the valve cover, the valve cover is sleeved on the valve body, a through hole is provided at the center of the valve body, the through hole is coaxial with the inner hole of the valve cover, a piston is also provided in the valve cover, the upper part of the piston is sealed and connected to the inner hole of the valve cover, the lower part of the piston passes through the through hole of the valve body and extends downward, the lower part of the piston is sealed and connected to the through hole of the valve body, the bottom end of the piston is fixedly connected to the valve disc, and the return spring is provided between the piston and the valve cover. The technical solution connects the air pipe to the air inlet and introduces air to push the piston. At this time, the gas in the inner cavity of the valve cover above the piston is discharged from the air outlet, thereby separating the valve disc and the valve seat, thereby opening the valve. When it is necessary to cut off the medium and prevent it from flowing, the air source is cut off, and the valve disc and the valve seat are closed by the action of the return spring to close the valve. In this technical solution, there is only one flow channel for the medium. When the pneumatic control valve is not used, but a small flow of water is required to flow in the pneumatic control valve, it may be inconvenient for the user to control the flow in the pneumatic control valve, thereby causing a waste of resources. Utility Model Content

[0004] In view of the above problems, the utility model proposes a pneumatic control valve with good water-saving effect, which well solves the problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a pneumatic control valve with good water-saving effect, including a valve body and a valve seat, the valve seat is provided with a connected inlet channel and a discharge channel, the valve seat is provided with a water-saving channel connected with the inlet channel and the discharge channel, the front side of the valve seat is threadedly connected with a diaphragm fixing block, a second diaphragm is sandwiched between the rear side of the diaphragm fixing block and the water-saving channel, the diaphragm fixing block is threadedly connected with a shaft body, the rear end of the shaft body is rotatably connected with a sealing block located in the water-saving channel, the rear side of the sealing block abuts against the second diaphragm, so that the second diaphragm and the water-saving channel are sealed and fit.

[0006] Furthermore, a water-saving handle is arranged at one end of the shaft body facing away from the sealing block, and a fixing screw threadedly connected to the shaft body is arranged in the water-saving handle.

[0007] Furthermore, a second locking nut is provided at one end of the shaft body that faces away from the sealing block and extends out of the diaphragm fixing block, and the second locking nut is located at the rear side of the water-saving handle.

[0008] Furthermore, the valve body includes a shell, a piston arranged in the shell, a first handle threadedly connected to the upper end of the shell, a threaded part threadedly connected to the lower end of the shell, and a first diaphragm clamped between the lower side of the threaded part and the valve seat, the lower side of the piston is fixedly connected to the first diaphragm, and the upper end of the piston is inserted into the first handle.

[0009] Furthermore, a first locking nut is provided at one end of the first handle located outside the housing.

[0010] Furthermore, the annular side surface of the piston is provided with an annular protrusion in contact with the inner wall of the housing, and the housing is provided with a spring in contact with the upper side surface of the annular protrusion.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model realizes small flow transportation of medium in the pneumatic control valve through the water-saving channel, reduces the waste of medium, improves the water-saving effect of the pneumatic control valve, and realizes the closing and opening of the water-saving channel through the diaphragm fixing block, the shaft body, the sealing block and the second diaphragm, which is convenient for the staff to control the closing and opening of the water-saving channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 Right view of;

[0015] Figure 3 For this utility model Figure 1 Cross-sectional view of the AA portion.

[0016] In the figure, 1-valve seat; 101-inlet channel; 102-discharge channel; 103-water-saving channel; 2-valve body; 201-piston; 202-first handle; 203-first diaphragm; 204-exhaust hole; 205-inlet hole; 206-first locking nut; 207-housing; 208-spring; 209-threaded part; 3-diaphragm fixing block; 4-second diaphragm; 5-shaft body; 6-second locking nut; 7-water-saving handle; 8-fixing screw; 9-sealing block. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, a pneumatic control valve with good water-saving effect includes a valve body 2 and a valve seat 1, wherein the valve seat 1 is provided with a connected inlet channel 101 and an outlet channel 102, wherein the valve seat 1 is provided with a water-saving channel 103 connected with the inlet channel 101 and the outlet channel 102, wherein the front side of the valve seat 1 is threadedly connected with a diaphragm fixing block 3, wherein a second diaphragm 4 is sandwiched between the rear side of the diaphragm fixing block 3 and the valve seat 1, wherein the diaphragm fixing block 3 is internally threadedly connected with a shaft body 5, wherein the rear end of the shaft body 5 is connected with a sealing block 9 located in the water-saving channel 103, wherein the rear side of the sealing block 9 abuts against the second diaphragm 4 so that the second diaphragm 4 and the water-saving channel 103 are sealed and fit.

[0019] When the pneumatic control valve is closed, the staff controls the valve body 2 to disconnect the inlet channel 101 from the outlet channel 102, and then the staff rotates the shaft body 5 to drive the sealing block 9 to move forward of the valve seat 1, so that the second diaphragm 4 does not contact the rear side of the water-saving channel 103, thereby connecting the water-saving channel 103 to the inlet channel 101. At this time, the medium in the entry channel 101 can enter the outlet channel 102 through the water-saving channel 103, thereby realizing a small flow rate of the medium in the pneumatic control valve, preventing bacteria from growing inside the pneumatic control valve, and reducing the waste of the medium in the pneumatic control valve. When the pneumatic control valve is used normally, the staff rotates the shaft body 5 in the opposite direction to make the sealing block 9 push the second diaphragm 4 to seal and contact the water-saving channel 103, thereby disconnecting the water-saving channel 103 from the inlet channel 101. After that, the staff can connect the inlet channel 101 and the outlet channel 102 by controlling the valve body 2, thereby achieving a large flow rate in the pneumatic control valve, thereby realizing the normal use of the pneumatic control valve.

[0020] In this embodiment, a water-saving handle 7 is provided at one end of the shaft body 5 located outside the diaphragm fixing block 3, and a fixing screw 8 threadedly connected to the shaft body 5 is provided in the water-saving handle 7. When in use, the staff can drive the shaft body 5 to rotate by rotating the water-saving handle 7, thereby facilitating the staff to rotate the shaft body 5.

[0021] In this embodiment, one end of the shaft body 5 located outside the diaphragm fixing block 3 is threadedly connected to a second locking nut 6, and the second locking nut 6 is located on the rear side of the water-saving handle 7. When in use, the staff can limit the shaft body 5 by rotating the second locking nut 6 to prevent the shaft body 5 from rotating when not in use, thereby ensuring the reliability of the shaft body 5.

[0022] In this embodiment, the valve body 2 includes a shell 207, a piston 201 inserted in the shell 207, a first handle 202 threadedly connected to the upper end of the shell 207, a threaded member 209 threadedly connected to the lower end of the shell 207, and a first diaphragm 203 sandwiched between the lower side of the threaded member 209 and the valve seat 1. The lower side of the piston 201 is fixedly connected to the first diaphragm 203, and the upper end of the piston 201 is inserted in the first handle 202. The annular side of the shell 207 is provided with an air inlet 205 and an exhaust hole 204. When in use, the staff can fill air into the lower part of the piston 201 through the air inlet 205, and the piston 20 1 is discharged through the exhaust hole 204. At this time, the piston 201 moves upward under the action of air pressure, so that the first diaphragm 203 is not in sealing contact with the valve seat 1, thereby connecting the inlet channel 101 with the outlet channel 102, and realizing the flow of the medium in the pneumatic control valve. The staff can drive the piston 201 to move up and down by turning the first handle 202. When the pneumatic control valve is closed, the staff turns the first handle 202 to drive the piston 201 to move downward so that the piston 201 contacts the first diaphragm 203 and moves downward to the valve seat 1 in sealing contact, thereby disconnecting the inlet channel 101 from the outlet channel 102, thereby realizing the closing of the pneumatic control valve.

[0023] In this embodiment, one end of the first handle 202 located outside the shell 207 is threadedly connected to the first locking nut 206. When in use, the staff can limit the first handle 202 by rotating the first locking nut 206 to make the lower side of the first locking nut 206 fit with the upper side of the shell 207, thereby preventing the first handle 202 from shaking during use, thereby ensuring the reliability of the pneumatic control valve during use.

[0024] In this embodiment, the annular side surface of the piston 201 is integrally formed with an annular protrusion that contacts the inner wall of the shell 207, and a spring 208 that contacts the upper side surface of the annular protrusion is arranged in the shell 207. When the pneumatic control valve is closed, the spring 208 applies a downward elastic force to the piston 201, so that the first diaphragm 203 is always in sealing contact with the valve seat 1, thereby ensuring the reliability of the sealing of the pneumatic control valve.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. 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 pneumatic control valve with good water-saving effect, comprising a valve body and a valve seat, wherein the valve seat is provided with a communicating inlet channel and an outlet channel, characterized in that: A water-saving channel connected to the inlet channel and the outlet channel is opened in the valve seat, a diaphragm fixing block is threadedly connected to the front side of the valve seat, a second diaphragm is sandwiched between the rear side of the diaphragm fixing block and the water-saving channel, a shaft body is threadedly connected to the diaphragm fixing block, a sealing block located in the water-saving channel is rotatably connected to the rear end of the shaft body, and the rear side of the sealing block abuts against the second diaphragm to make the second diaphragm seal and fit the water-saving channel.

2. A pneumatic control valve with good water-saving effect according to claim 1, characterized in that: A water-saving handle is arranged at one end of the shaft body facing away from the sealing block, and a fixing screw threadedly connected to the shaft body is arranged in the water-saving handle.

3. A pneumatic control valve with good water-saving effect according to claim 1 or 2, characterized in that: The end of the shaft body that faces away from the sealing block and extends out of the diaphragm fixing block is provided with a second locking nut, and the second locking nut is located at the rear side of the water-saving handle.

4. A pneumatic control valve with good water-saving effect according to claim 1, characterized in that: The valve body includes a shell, a piston arranged in the shell, a first handle threadedly connected to the upper end of the shell, a threaded part threadedly connected to the lower end of the shell, and a first diaphragm clamped between the lower side of the threaded part and the valve seat, the lower side of the piston is fixedly connected to the first diaphragm, and the upper end of the piston is inserted into the first handle.

5. A pneumatic control valve with good water-saving effect according to claim 4, characterized in that: A first locking nut is disposed at one end of the first handle located outside the housing.

6. A pneumatic control valve with good water-saving effect according to claim 4, characterized in that: The annular side surface of the piston is provided with an annular protrusion in contact with the inner wall of the housing, and the housing is provided with a spring in contact with the upper side surface of the annular protrusion.

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