Novel diaphragm valve

Abstract

The utility model discloses a novel diaphragm valve. The novel diaphragm valve comprises a valve seat, a diaphragm valve element made of elastic materials and an adjusting assembly. The valve seat is provided with a liquid channel which axially penetrates through two opposite side surfaces; the diaphragm valve element comprises a diaphragm piece, an end face sealing block and a core body which are coaxial and sequentially and integrally connected from top to bottom, the center of the upper surface of the diaphragm piece is detachably connected with the adjusting assembly, the edge of the diaphragm piece is connected to the valve seat, the end face sealing block is hermetically attached to an adjusting opening in the upper end of the liquid channel, and the core body penetrates through the adjusting opening to be hermetically attached to the liquid channel. The adjusting assembly drives the core body to move up and down to adjust the liquid passing section of the liquid channel, and therefore the liquid flow is controlled. The valve has the advantages of being clean in liquid drainage, free of residues, suitable for severe liquid drainage scenes, long in service life and high in liquid drainage speed.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a novel diaphragm valve. Background Art

[0002] The pneumatic diaphragm valve is composed of a diaphragm valve and a pneumatic actuator. It uses compressed air as a power source to regulate the flow of fluid media in the process pipeline. Most pneumatic diaphragm valves have a right-angle channel between the inlet and outlet. The diaphragm seals the vertical port of the right-angle channel. The diaphragm moves upward, and the liquid flows from the gap between the vertical port and the inlet. The defect is that when the liquid in the right-angle channel and the inlet pipe does not exceed the liquid level of the vertical port, the liquid cannot be completely discharged, and there will be residual liquid in the right-angle channel and the inlet pipe. The residual liquid will penetrate into the valve and pollute various components, affecting the working state of the valve, especially in the photovoltaic field. The circulating liquid contains acidic corrosive liquid, which will damage the components for a long time and reduce the service life of the valve. Utility Model Content

[0003] In order to solve one or more of the above problems, the utility model provides a novel diaphragm valve.

[0004] According to one aspect of the utility model, the novel diaphragm valve comprises: a valve seat, a diaphragm valve core made of elastic material, and an adjusting component;

[0005] The valve seat is provided with a liquid passage axially penetrating two opposite sides, and the upper end wall of the liquid passage is provided with an adjusting port;

[0006] The diaphragm valve core includes a diaphragm sheet, an end face seal block and a core body which are coaxial and connected in sequence from top to bottom. The center of the upper surface of the diaphragm sheet is detachably connected to the adjustment component and its edge is connected to the valve seat. The end face seal block is sealed to the adjustment port, and the core body passes through the adjustment port and is sealed to the liquid channel.

[0007] The regulating component drives the core body to move up and down to adjust the liquid flow cross section of the liquid channel, thereby controlling the flow rate of the liquid.

[0008] In some embodiments, a positioning groove is provided on the lower end surface of the liquid channel, and a positioning end head matching the positioning groove is provided at the lower end of the core body.

[0009] In some embodiments, the positioning groove is a spherical groove, and the positioning end is a hemispherical end.

[0010] In some embodiments, the central vertical cross-section of the core is equal to or slightly larger than the vertical cross-section of the corresponding liquid channel;

[0011] Or from bottom to top, the diameter of the horizontal circular cross section of the core gradually increases.

[0012] In some embodiments, an end surface leak-proof ring is provided on the upper edge of the regulating port, or a circumferential leak-proof ring is provided on the inner wall of the liquid channel.

[0013] In some embodiments, the sealing flange at the edge of the diaphragm is connected to the limiting ring groove of the valve seat.

[0014] In some embodiments, the adjustment assembly includes an adjustment seat, a valve stem, a push block, a valve cover, and a compression spring;

[0015] The lower end of the regulating seat is connected to the valve seat and the upper end thereof is connected to the valve cover;

[0016] The lower end of the valve stem has a central hole of a shaft sleeve adjusting seat and its end is threadedly connected to the diaphragm valve core, the middle of the valve stem is connected to a push block, and the upper end of the valve stem has a shaft sleeve passing through the upper through hole of the valve cover;

[0017] The push block slides in contact with the slide groove of the adjustment seat and is located above the air inlet and the air release port. A compression spring is arranged between the push block and the valve cover.

[0018] In some embodiments, the upper surface of the diaphragm is in contact with the first sealing ring.

[0019] In some embodiments, an overflow port is provided at the bottom end of the valve seat, and ports on both sides of the liquid channel are respectively a liquid inlet and a liquid outlet, and outer walls of the ports on both sides are provided with threaded interfaces.

[0020] In some embodiments, the diaphragm valve core is made of PTFE polytetrafluoroethylene material.

[0021] The new diaphragm valve has a valve seat and a diaphragm valve core of a new structure. The valve seat is provided with a liquid channel of a horizontal straight-through structure. The diaphragm valve core adopts double sealing of the core body and the diaphragm sheet. The liquid does not need to turn from the top to flow to the liquid outlet, but the liquid is discharged directly from the bottom of the liquid channel. Its beneficial effects are: first, the discharge is clean and without residue, and no liquid penetrates into the interior of the valve to pollute the various components. The valve maintains a good working condition for a long time. It is suitable for the discharge of acid and alkali corrosive liquids and high-temperature residual liquids, and the valve has a long service life; second, the lower gap, lateral gap and upper gap of the core body and the liquid channel can discharge liquid, and a large amount of liquid can be discharged quickly; third, the liquid does not need to flow at a turning angle, the resistance is small, and the discharge speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view schematic diagram of a novel diaphragm valve according to one embodiment of the utility model;

[0023] Figure 2 for Figure 1 The AA cross-sectional view of the new diaphragm valve is shown;

[0024] Figure 3 for Figure 1The BB cross-sectional view of the new diaphragm valve is shown;

[0025] Figure 4 for Figure 2 A three-dimensional schematic diagram of the diaphragm valve core shown;

[0026] Figure 5 for Figure 1 A schematic rear view of the new diaphragm valve shown;

[0027] Figure 6 for Figure 1 A three-dimensional schematic diagram of the new diaphragm valve is shown;

[0028] Valve seat 1, liquid channel 100, regulating port 101, end surface leakproof ring 102, circumferential leakproof ring 103, positioning groove 104, regulating groove 105, limiting ring groove 106, overflow port 107, liquid inlet 108, liquid discharge port 109, threaded interface 110;

[0029] Diaphragm valve core 2, diaphragm sheet 20, sealing flange 201, core body 21, positioning end head 211, end face sealing block 22, upper end column 23;

[0030] Adjustment assembly 01, adjustment seat 3, slide groove 31, air inlet 32, air release port 33, first sealing ring 4, valve stem 5, push block 6, valve cover 7, compression spring 8. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0032] Figures 1 to 6 A new diaphragm valve according to an embodiment of the utility model is schematically shown. As shown in the figure, the new diaphragm valve comprises: a valve seat 1, a diaphragm valve core 2 made of elastic material, and an adjustment component 01;

[0033] The valve seat 1 is provided with a liquid passage 100 axially penetrating two opposite sides, and an adjustment port 101 is provided on the upper end wall of the liquid passage 100;

[0034] The diaphragm valve core 2 includes a diaphragm 20 and a core 21. The center of the upper surface of the diaphragm 20 is detachably connected to the adjustment component 01 and the center of the lower surface is integrally connected to the end face seal 22. The center of the lower end of the end face seal 23 is integrally connected to the core 21. The edge of the diaphragm 20 is connected to the upper surface of the valve seat 1. In a preferred connection mode, the edge of the diaphragm 20 also forms a sealing flange 201, and the middle of the upper surface of the valve seat 1 also forms an adjustment groove 105. The end wall of the adjustment groove 105 is provided with a limiting ring groove 106, and the sealing flange 201 is located in the vertical limiting ring groove 106. The end face seal 22 is sealed and fitted on the adjustment port 101, and the core 21 passes through the adjustment port 101 and is sealed and fitted to the liquid channel 100; preferably, the lower end surface of the liquid channel 100 is provided with a concave positioning groove 104, and the lower end of the core 21 is provided with a protruding structure positioning end head 211 with the same shape as the positioning groove 104. The positioning groove 104 can be preferably set as a spherical groove, and the positioning end 211 can be preferably set as a hemispherical end. This structure can further improve the sealing effect and prevent abnormal outflow of liquid when drainage is not required.

[0035] The regulating component 01 drives the core 21 to move up and down to adjust the liquid flow cross section of the liquid channel 100, thereby controlling the flow rate of the liquid.

[0036] The novel diaphragm valve has a valve seat 1 and a diaphragm valve core 2 of a novel structure. The valve seat 1 is provided with a liquid channel 100 of a horizontal straight-through structure. The diaphragm valve core 2 adopts a core body 21 and a diaphragm sheet 20 for double sealing. The liquid does not need to turn from the top to flow to the liquid outlet, but is discharged directly from the bottom of the liquid channel 100. Its beneficial effects are: first, the discharge is clean and without residue, and no liquid penetrates into the interior of the valve to pollute various components. The valve maintains a good working condition for a long time, is suitable for the discharge of acid and alkali corrosive liquids and high-temperature residual liquids, and has a long service life; second, the lower gap, lateral gap and upper gap of the core body 21 and the liquid channel 100 can discharge liquid, and can discharge liquid quickly with a large flux; third, the liquid does not need to flow at a turning angle, the resistance is small, and the discharge speed is fast.

[0037] Furthermore, the central vertical cross section of the core 21 is equal to or slightly larger than the vertical cross section of the corresponding liquid channel 100; preferably, the horizontal cross section of the core 21 is circular, and the diameter of the horizontal circular cross section of the core 21 gradually increases from bottom to top. The beneficial effect is that the core 21 of this structure conforms to fluid mechanics and the flow rate changes evenly.

[0038] Furthermore, the upper edge of the adjustment port 101 is provided with an end face leak-proof ring 102 protruding upward in an arc shape. Under the pre-tightening pressure of the adjustment component 01, the end face sealing block 22 is elastically deformed to connect with the end face leak-proof ring 102;

[0039] The inner wall of the liquid channel 100 is radially inwardly protruding and provided with a circumferential leakproof ring 103, and the positioning end 211 is elastically deformed and connected to the circumferential leakproof ring 103. The beneficial effect is that the liquid channel can be effectively sealed to prevent abnormal discharge of liquid.

[0040] Furthermore, the adjustment assembly 01 includes an adjustment seat 3, a valve stem 5, a push block 6, a valve cover 7 and a compression spring 8.

[0041] The lower end of the adjusting seat 3 is threadedly connected to the upper end of the valve seat 1 and the upper end thereof is threadedly connected to the valve cover 7. A slide groove 31 is provided on the upper surface of the adjusting seat 3 and an air inlet 32 ​​and an air discharge port 33 which are linked to the slide groove 31 are provided in the middle of the side surface. The beneficial effect is that the air inlet 32 ​​is connected to a pressure gauge to cooperate with the air discharge port 33 to adjust the air pressure in the device so as to control the lifting and lowering of the diaphragm valve core 2 to control the valve flow and improve the control accuracy of the device.

[0042] The shaft sleeve at the lower end of the valve stem 5 is adjusted to the center hole of the seat 3 and its end is threadedly connected to the diaphragm valve core 2. The middle of the valve stem 5 is integrally connected or detachably connected to the push block 6. The shaft sleeve at the upper end of the valve stem 5 passes through the upper through hole of the valve cover 7. The upper end of the valve stem 5 protrudes from the upper through hole, which is convenient for observing the working status of the valve and improving the convenience of device maintenance.

[0043] The push block 6 slides in the slide groove 31 and is located above the air inlet 32 ​​and the air release port 33. A compression spring 8 is also provided between the push block 6 and the valve cover 7. The beneficial effect is that the compression spring 8 can increase the pre-tightening stress to ensure that the diaphragm valve core 2 effectively seals the liquid channel 100.

[0044] Furthermore, the central threaded hole of the upper end column 23 of the diaphragm valve core 2 is connected to the threaded column at the lower end of the valve stem 5 . Preferably, the diameter of the upper end column 23 and the diameter of the lower end column of the valve stem 5 are the same as the aperture of the central hole of the adjustment seat 3 .

[0045] Furthermore, the upper surface of the diaphragm 20 fits the first sealing ring 4 in the lower groove of the adjustment seat 3 .

[0046] Preferably, a second sealing ring is provided between the slide groove 31 and the sealing groove of the push block 6, and between the sealing groove at the lower end of the valve stem 5 and the central hole of the adjustment seat 3. The beneficial effect is that the sealing ring 302 prevents liquid from leaking into the device and causing pollution, which can improve the safety of the device.

[0047] Furthermore, an overflow port 107 is provided at the bottom of the valve seat 1, and ports on both sides of the liquid channel 100 are respectively a liquid inlet 108 and a liquid outlet 109, and threaded interfaces 110 are provided on the outer walls of the ports on both sides;

[0048] The liquid inlet 108 and the liquid outlet 109 are symmetrically arranged about the central axis of the valve seat 1 .

[0049] Furthermore, the diaphragm valve core 2 is made of PTFE polytetrafluoroethylene material. PTFE material has good high temperature resistance, acid and alkali corrosion resistance, good elasticity, good machining performance, suitable for harsh environments, and long service life.

[0050] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. The new diaphragm valve is characterized by: include: A valve seat (1), a diaphragm valve core (2) made of elastic material, and an adjusting component (01); The valve seat (1) is provided with a liquid channel (100) axially penetrating two opposite side surfaces, and the upper end wall of the liquid channel (100) is provided with an adjustment port (101); The diaphragm valve core (2) comprises a diaphragm sheet (20), an end face sealing block (22) and a core body (21) which are coaxial and connected in sequence from top to bottom. The center of the upper surface of the diaphragm sheet (20) is detachably connected to the regulating component (01) and its edge is connected to the valve seat (1). The end face sealing block (22) is sealed against the regulating port (101). The core body (21) passes through the regulating port (101) and is sealed against the liquid channel (100). The regulating component (01) drives the core (21) to move up and down to adjust the liquid flow cross section of the liquid channel (100), thereby controlling the flow rate of the liquid.

2. The novel diaphragm valve according to claim 1 is characterized in that: The lower end surface of the liquid channel (100) is provided with a positioning groove (104), and the lower end of the core body (21) is provided with a positioning end head (211) that matches the positioning groove (104).

3. The novel diaphragm valve according to claim 2 is characterized in that: The positioning groove (104) is a spherical groove, and the positioning end head (211) is a hemispherical end head.

4. The novel diaphragm valve according to claim 3 is characterized in that: The central vertical cross-section of the core (21) is equal to or slightly larger than the corresponding vertical cross-section of the liquid channel (100); Or from bottom to top, the diameter of the horizontal circular cross section of the core (21) gradually increases.

5. The novel diaphragm valve according to claim 1 is characterized in that: The upper edge of the regulating port (101) is provided with an end surface leak-proof ring (102), or the inner wall of the liquid channel (100) is provided with a circumferential leak-proof ring (103).

6. The novel diaphragm valve according to claim 1 is characterized in that: The sealing flange (201) at the edge of the diaphragm (20) is connected to the limiting ring groove (106) of the valve seat (1).

7. The novel diaphragm valve according to claim 1 is characterized in that: The regulating assembly (01) comprises an regulating seat (3), a valve stem (5), a push block (6), a valve cover (7) and a compression spring (8); The lower end of the adjusting seat (3) is connected to the valve seat (1) and the upper end thereof is connected to the valve cover (7); The lower end of the valve stem (5) is sleeved in the central hole of the adjustment seat (3) and its end is threadedly connected to the diaphragm valve core (2); the middle of the valve stem (5) is connected to the push block (6); the upper end of the valve stem (5) is sleeved through the upper through hole of the valve cover (7); The push block (6) slides in contact with the slide groove (31) of the adjustment seat (3) and is located above the air inlet (32) and the air discharge port (33). A compression spring (8) is provided between the push block (6) and the valve cover (7).

8. The novel diaphragm valve according to claim 1 is characterized in that: The upper surface of the diaphragm (20) is in contact with the first sealing ring (4).

9. The novel diaphragm valve according to claim 1 is characterized in that: The bottom end of the valve seat (1) is provided with an overflow port (107), and the ports on both sides of the liquid channel (100) are respectively a liquid inlet (108) and a liquid outlet (109), and the outer walls of the ports on both sides are provided with threaded interfaces (110).

10. The novel diaphragm valve according to any one of claims 1 to 9, characterized in that: The diaphragm valve core (2) is made of PTFE polytetrafluoroethylene material.

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