Diaphragm valve with sensing function

Abstract

The utility model discloses a diaphragm valve with a sensing function, and particularly relates to the field of diaphragm valves, which comprises a valve seat, a water inlet is arranged at one end of the valve seat, a water outlet is arranged at the other end of the valve seat, a sealing gasket is arranged at the top end in the valve seat, a diaphragm is in compression joint with the top end of the sealing gasket, and a valve plug is arranged at the top end of the diaphragm. The top end of the valve plug is sleeved with a limiting ring, the top end of the limiting ring is connected with a locking sleeve in a pressing mode, the locking sleeve is in spiral connection with the valve seat, a lifting assembly is inserted into the top end of the locking sleeve, the lifting assembly is sleeved with a spring, the lifting assembly is sleeved with an air cylinder shell, and an air injection opening is formed in the middle of the top end of the air cylinder shell. A position sensor is installed on one side of the gas injection opening, and the bottom end of the position sensor is connected with the lifting assembly. Opening and closing monitoring of the diaphragm valve can be completed by additionally arranging the position sensor, and the diaphragm valve has the advantages of being simple in overall structure, convenient to operate, high in safety, capable of saving manufacturing cost and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm valves, and more specifically, the utility model relates to a diaphragm valve with an induction function. Background Art

[0002] The opening and closing principle of pneumatic diaphragm valves on the market is that the solenoid valve cooperates with the counter and PLC programming program to control the diaphragm valve. Each opening and closing is calculated by the solenoid valve opening and closing once. The opening, closing or half-open state of this traditional diaphragm valve is invisible, and its opening and closing state cannot be monitored by electronic devices. Due to special working conditions requirements, that is, wanting to know the half-open, unopened, slightly opened and other situations of the diaphragm valve.

[0003] Therefore, a diaphragm valve with an induction function is proposed, which can be installed by means of threads and add a sensor to complete the opening and closing monitoring of the diaphragm valve without changing any components. Summary of the Utility Model

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a diaphragm valve with an induction function to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A diaphragm valve with an induction function includes a valve seat. One end of the valve seat is provided with a water inlet, and the other end of the valve seat is provided with a water outlet. A sealing gasket is arranged at the top end inside the valve seat, a diaphragm is press-fitted on the top of the sealing gasket, a valve plug is arranged at the top of the diaphragm, a limiting ring is sleeved on the top of the valve plug, a locking sleeve spirally connected with the valve seat is press-fitted on the top of the limiting ring, a lifting component is inserted into the top of the locking sleeve, a spring is sleeved on the lifting component, a cylinder housing is sleeved on the lifting component, an air injection port is opened in the middle of the top of the cylinder housing, a position sensor is installed on one side of the air injection port, and the bottom end of the position sensor is connected with the lifting component.

[0006] Preferably, a valve port part is in interference fit with the top end inside the valve seat, and an annular overflow groove is arranged on the outer side of the valve port part, and the annular overflow groove is communicated with the water outlet.

[0007] Preferably, the lifting assembly includes an upper valve stem, a first sealing ring, a connecting rod, a valve disc, a support groove, a second sealing ring, a lower valve stem and a third sealing ring. The upper valve stem is slidably connected to the bottom of the gas injection port, and a first sealing ring is sleeved at the sliding connection of the upper valve stem. A connecting rod is provided at the bottom end of the upper valve stem, a valve disc is connected to the bottom of the connecting rod, a support groove is formed around the bottom of the connecting rod on the top of the valve disc, a second sealing ring is sleeved on the outer edge of the valve disc, the top of the valve disc is connected to the bottom of the position sensor, a lower valve stem is connected to the bottom end of the valve disc, the lower valve stem is slidably connected to the locking sleeve, a third sealing ring is sleeved at the sliding connection of the lower valve stem, and the bottom end of the lower valve stem abuts against the valve plug.

[0008] Preferably, a spring is supported in the support groove, and the top end of the spring abuts against and is limited at the inner top end of the cylinder housing.

[0009] The technical effects and advantages of the present utility model:

[0010] By adding a position sensor, the present utility model can complete the opening and closing monitoring of the diaphragm valve, and has the advantages of simple overall structure, convenient operation, high safety, cost saving in manufacturing and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0012] Figure 2 is a schematic cross-sectional structure diagram of the present utility model.

[0013] Figure 3 For the present utility model Figure 2 is a partial enlarged structural schematic diagram of part A in

[0014] Figure 4 is a structural schematic diagram of the lifting assembly of the present utility model.

[0015] The reference numerals are: 1, valve seat; 2, water inlet; 3, water outlet; 4, locking sleeve; 5, cylinder housing; 6, gas injection port; 7, position sensor; 8, lifting assembly; 801, upper valve stem; 802, first sealing ring; 803, connecting rod; 804, valve disc; 805, support groove; 806, second sealing ring; 807, lower valve stem; 808, third sealing ring; 9, spring; 10, limiting ring; 11, valve plug; 12, gasket; 13, diaphragm. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] As shown in the attached Figures 1-4 A diaphragm valve with an induction function, including a valve seat 1, one end of the valve seat 1 is provided with a water inlet 2, the other end of the valve seat 1 is provided with a water outlet 3, a sealing gasket 12 is arranged at the top end inside the valve seat 1, a diaphragm 13 is press-fitted on the top of the sealing gasket 12, a valve plug 11 is arranged at the top of the diaphragm 13, a limit ring 10 is sleeved on the top of the valve plug 11, a locking sleeve 4 screwed to the valve seat 1 is press-fitted on the top of the limit ring 10, a lifting assembly 8 is inserted into the top of the locking sleeve 4, a spring 9 is sleeved on the lifting assembly 8, a cylinder housing 5 is sleeved on the lifting assembly 8, an air injection port 6 is opened in the middle of the top of the cylinder housing 5, a position sensor 7 is installed on one side of the air injection port 6, and the bottom end of the position sensor 7 is connected to the lifting assembly 8.

[0018] A valve port part is in interference fit with the top end inside the valve seat 1, and an annular overflow groove is arranged on the outer side of the valve port part, and the annular overflow groove is communicated with the water outlet 3.

[0019] The lifting assembly 8 includes an upper valve rod 801, a first sealing ring 802, a connecting rod 803, a valve disc 804, a support groove 805, a second sealing ring 806, a lower valve rod 807 and a third sealing ring 808. The upper valve rod 801 is slidably connected to the bottom of the air injection port 6, and a first sealing ring 802 is sleeved at the sliding connection of the upper valve rod 801. Through the first sealing ring 802, the moving part at the bottom of the air injection port 6 can be sealed. The bottom end of the upper valve rod 801 is provided with a connecting rod 803, the bottom of the connecting rod 803 is connected with a valve disc 804, a support groove 805 is formed around the bottom of the connecting rod 803 on the top of the valve disc 804, a second sealing ring 806 is sleeved on the outer edge of the valve disc 804. Through the deformation of the outer side of the second sealing ring 806 caused by the extrusion of the inner wall of the top of the locking sleeve 4, the sealing performance can be further improved and air leakage can be avoided. The top of the valve disc 804 is connected to the bottom end of the position sensor 7, the bottom end of the valve disc 804 is connected with a lower valve rod 807, the lower valve rod 807 is slidably connected to the locking sleeve 4, a third sealing ring 808 is sleeved at the sliding connection of the lower valve rod 807, and the bottom end of the lower valve rod 807 abuts against the valve plug 11. By sealing the top of the valve plug 11 through the third sealing ring 808, water backflow into the cylinder can be avoided, and the safety and sealing performance of use can be improved.

[0020] A spring 9 is supported within the support groove 805, and the top end of the spring 9 abuts and is limited at the inner top end of the cylinder housing 5. Through the installation of the spring 9, the relaxation effect of the lifting assembly 8 is improved.

[0021] During specific implementation, air is injected through the air injection port 6, causing the top of the lifting assembly 8 to be affected by air pressure and the lifting assembly 8 to descend, pressing down on the valve plug 11, thereby deforming the diaphragm 13 to squeeze the gasket 12, thus sealing the valve port component and blocking the connection between the water inlet 2 and the water outlet 3. Therefore, by controlling the air injection volume, the extrusion strength of the diaphragm 13 can be controlled, and thus the sealing effect of the gasket 12 on the valve port component can be changed to achieve fine adjustment and opening / closing control. During the entire fine adjustment and opening / closing control process, the floating height of the lifting assembly 8 is different. Therefore, by detecting the position height of the lifting assembly 8 through the position sensor 7, the opening and closing monitoring of the diaphragm valve can be achieved.

[0022] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A diaphragm valve with a sensing function, comprising a valve seat (1), characterized in that: A water inlet (2) is provided at one end of the valve seat (1), and a water outlet (3) is provided at the other end of the valve seat (1). A sealing gasket (12) is provided at the top end of the valve seat (1). A diaphragm (13) is crimped onto the top end of the sealing gasket (12). A valve plug (11) is provided at the top end of the diaphragm (13). A limiting ring (10) is sleeved onto the top end of the valve plug (11). A locking sleeve (4) which is spirally connected to the valve seat (1) is crimped onto the top end of the limiting ring (10). A lifting assembly (8) is inserted into the top end of the locking sleeve (4). A spring (9) is sleeved onto the lifting assembly (8). A cylinder housing (5) is sleeved onto the lifting assembly (8). An air injection port (6) is provided in the middle of the top end of the cylinder housing (5). A position sensor (7) is installed on one side of the air injection port (6). The bottom end of the position sensor (7) is connected to the lifting assembly (8).

2. The diaphragm valve with sensing function according to claim 1, characterized in that: The top of the valve seat (1) is interference-fitted with a valve port piece, and an annular overflow groove is arranged on the outside of the valve port piece, and the annular overflow groove is connected to the water outlet (3).

3. A diaphragm valve with induction function according to claim 2, characterized in that: The lifting assembly (8) comprises an upper valve stem (801), a first sealing ring (802), a connecting rod (803), a valve disc (804), a supporting groove (805), a second sealing ring (806), a lower valve stem (807) and a third sealing ring (808); the upper valve stem (801) is slidably connected to the bottom of the gas injection port (6), and the first sealing ring (802) is sleeved at the sliding connection of the upper valve stem (801); a connecting rod (803) is provided at the bottom end of the upper valve stem (801), and the bottom of the connecting rod (803) is connected to the valve disc (804). ), a supporting groove (805) is provided at the top of the valve disc (804) around the bottom of the connecting rod (803), a second sealing ring (806) is sleeved on the outer edge of the valve disc (804), the top of the valve disc (804) is connected to the bottom of the position sensor (7), the bottom end of the valve disc (804) is connected to a lower valve stem (807), the lower valve stem (807) is slidably connected to the locking sleeve (4), a third sealing ring (808) is sleeved at the sliding connection of the lower valve stem (807), and the bottom end of the lower valve stem (807) is top-connected to the valve plug (11).

4. The diaphragm valve with sensing function according to claim 3, characterized in that: A spring (9) is supported in the support groove (805), and the top end of the spring (9) is contacted and limited at the top end inside the cylinder housing (5).

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