Diaphragm valve

Abstract

The utility model relates to the technical field of diaphragm valves, and particularly discloses a diaphragm valve which comprises a valve body, the valve body comprises an air inlet end, an air inlet, an air outlet end, an air outlet and a connecting end, the air inlet end is communicated with the air inlet, the air outlet end is communicated with the air outlet, and the connecting end is located on the upper side of the valve body; the diaphragm is adjacent to the air inlet, and the diaphragm is in an arc shape; the functional mechanism comprises a center rod, a valve bonnet, an M4 screw and a pressing ring, the valve bonnet is in threaded connection with the connecting end, the valve bonnet is connected with the center rod, the M4 screw is arranged at one end of the center rod, the pressing ring is adjacent to the other end of the center rod, a first sealing ring is arranged between the other end of the center rod and the valve bonnet, and a concave spherical surface is formed in the middle of the pressing ring; the steel ball is placed in the concave spherical surface, and the center rod abuts against the steel ball. The hand wheel is connected with the center rod; the diaphragm valve overcomes the defects of incomplete sealing and difficulty in maintenance / disassembly of the diaphragm valve in the prior art.

Description

Technical Field

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

[0002] Diaphragm valve is an important fluid control device, widely used in various industrial and medical fields. Its main features are simple structure, good sealing, corrosion resistance and wear resistance, which make diaphragm valve widely used in gas and fluid control systems.

[0003] The diaphragm valve controls the on and off of gas / fluid by the movement of the diaphragm. As an efficient and reliable fluid control device, it plays an important role in many industries.

[0004] In the prior art, the diaphragm valve may encounter the problem of difficult sealing during use. When the air inlet pressure of the diaphragm valve is relatively high, air leakage and incomplete sealing may occur. At the same time, in the prior art, the process of disassembling and repairing the diaphragm valve is relatively complicated. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The problem to be solved by the utility model is to provide a diaphragm valve to overcome the defects of incomplete sealing and difficulty in repairing / disassembling the diaphragm valve in the prior art.

[0007] (II) Technical solution

[0008] In order to solve the technical problem, the utility model provides a diaphragm valve, comprising:

[0009] A valve body, the valve body comprising an air inlet end, an air inlet port, an air outlet end, an air outlet port and a connecting end, the air inlet end is communicated with the air inlet port, the air outlet end is communicated with the air outlet port, the connecting end is located on the upper side of the valve body, the air inlet end is located on one side of the valve body, and the air outlet end is located on the other side of the valve body;

[0010] A diaphragm, the diaphragm is arranged adjacent to the air inlet, and the diaphragm is arc-shaped;

[0011] Functional mechanism, the functional mechanism comprises a center rod, a valve bonnet, an M4 screw and a pressure ring, the valve bonnet is threadedly connected to the connection end, the valve bonnet is connected to the center rod, the M4 screw is arranged at one end of the center rod, the pressure ring is arranged adjacent to the other end of the center rod, a first sealing ring is provided between the other end of the center rod and the valve bonnet, a concave spherical surface is provided in the middle of the pressure ring, a steel ball is placed in the concave spherical surface, and the center rod abuts against the steel ball;

[0012] A hand wheel is connected to the center rod.

[0013] As for the diaphragm valve mentioned above, optionally, the inner wall of the valve cap is provided with an internal thread, the outer surface of the center rod is provided with an external thread, and the valve cap and the center rod are threadedly connected via the internal thread and the external thread.

[0014] As mentioned above, the diaphragm valve may optionally include a second sealing ring, and the second sealing ring is arranged adjacent to the air inlet.

[0015] As described above, the diaphragm valve may optionally include a handwheel cover, wherein the handwheel cover is connected to the handwheel, and an observation slot is provided on the handwheel cover.

[0016] As for the diaphragm valve described above, optionally, the hand wheel further includes an indicator ring inside. As for the diaphragm valve described above, optionally, the M4 screw, the center rod, the valve cap and the pressure ring are coaxially arranged.

[0017] (III) Beneficial effects

[0018] The utility model provides a diaphragm valve, which has the following beneficial effects:

[0019] (1) In the utility model, when the diaphragm valve is in the airflow closed state, the hand wheel is turned counterclockwise. Since the hand wheel is connected to the center rod, the center rod rotates with the rotation of the hand wheel. The inner surface of the valve cap is threadedly connected to the center rod. As the center rod rotates, the center rod extends toward the diaphragm side. Because the center rod abuts against the steel ball, as the center rod extends, the steel ball moves downward to squeeze the pressure ring, so that the pressure ring presses the diaphragm tightly, and the diaphragm is deformed, thereby abutting against the second sealing ring. The airflow plays a sealing role under the cooperation of the second sealing ring and the diaphragm; when the diaphragm valve is in the airflow open state, the hand wheel is turned clockwise, the center rod is lifted upward, the diaphragm valve rebounds, and the airflow flows from the air inlet to the air outlet. At the same time, there is a first sealing ring between the center rod and the valve cap, which can isolate the airflow from external impurities. This step can ensure the sealing effect of the diaphragm valve and ensure that the diaphragm valve does not leak when opening / closing the gas.

[0020] (2) The utility model can realize the disassembly / installation of the diaphragm valve by quickly removing the handwheel cover and the M4 screw, and complete the inspection / cleaning of the diaphragm valve failure, which is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a cross-sectional view of a diaphragm valve of the utility model;

[0023] Figure 2 The utility model is a top view of a diaphragm valve.

[0024] The corresponding component names of the various figure marks in the figure are: 1. valve body; 11. air inlet end; 12. air inlet; 13. air outlet end; 14. air outlet; 15. connecting end; 2. diaphragm; 3. handwheel; 31. indicator ring; 4. functional mechanism; 41. center rod; 42. valve cap; 43. M4 screw; 44. pressure ring; 5. handwheel cover; 6. first sealing ring; 7. steel ball; 8. second sealing ring. DETAILED DESCRIPTION

[0025] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0027] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0028] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0029] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0030] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0031] See also Figure 1 to Figure 2 The utility model provides a diaphragm valve, comprising a valve body 1, a diaphragm 2, a functional mechanism 4 and a hand wheel 3. The diaphragm 2 is arranged inside the valve body 1, the functional mechanism 4 is connected to the valve body 1, and the hand wheel 3 is connected to the functional mechanism 4.

[0032] exist Figure 1 to Figure 2 In an optional embodiment, the valve body 1 includes an air inlet end 11, an air inlet port 12, an air outlet end 13, an air outlet port 14 and a connecting end 15, the air inlet end 11 is connected to the air inlet port 12, the air outlet end 13 is connected to the air outlet port 14, the connecting end 15 is located on the upper side of the valve body 1, the air inlet end 11 is located on one side of the valve body 1, and the air outlet end 13 is located on the other side of the valve body 1.

[0033] Specifically, due to the air outlet 14 and the connecting end 15 , the air inlet end 11 is connected with the air inlet 12 , and the air flow can be taken in from the air inlet end 11 , flow into the air inlet 12 , flow out from the air outlet 14 , and flow out from the air outlet end 13 .

[0034] Furthermore, the diaphragm valve 2 further includes a second sealing ring 8 , which is disposed adjacent to the air inlet 12 .

[0035] exist Figure 1 to Figure 2 In an optional embodiment, the diaphragm 2 is arranged adjacent to the air inlet 12, and the diaphragm 2 is arc-shaped. When the diaphragm 2 is displaced and contacts with the second sealing ring 8, the air inlet 12 of the diaphragm valve is closed, and air flow cannot enter from the air inlet 12; when the diaphragm 2 is displaced and does not contact with the second sealing ring 8, the air inlet 12 of the diaphragm valve is opened, and air flow can enter from the air inlet 12.

[0036] exist Figure 1 to Figure 2 In an optional embodiment, the functional mechanism 4 includes a center rod 41, a valve cap 42, an M4 screw 43 and a pressure ring 44. The outer surface of the valve cap 42 has an external thread, and the inner surface of the connecting end 15 has an internal thread, and the valve cap 42 can be threadedly connected to the connecting end 15 under the cooperation of the internal thread and the external thread.

[0037] Furthermore, the valve bonnet 42 is coaxial with the center rod 41 , wherein the inner wall of the valve bonnet 42 is provided with an internal thread, the outer surface of the center rod 41 is provided with an external thread, and the valve bonnet 42 and the center rod 41 are threadedly connected via the internal thread and the external thread.

[0038] Furthermore, the M4 screw 43 is coaxial with the center rod 41, and the M4 bolt plays a fixing role. Specifically, the M4 screw 43 is arranged at one end of the center rod 41, and the pressure ring 44 is arranged adjacent to the other end of the center rod 41. There is a first sealing ring 6 between the other end of the center rod 41 and the valve cap 42, which plays a secondary sealing role for the gas. A concave spherical surface is opened in the middle of the pressure ring 44, and the steel ball 7 is placed in the concave spherical surface, and the center rod 41 abuts against the steel ball 7.

[0039] exist Figure 1 to Figure 2 In an optional embodiment, the hand wheel 3 is connected to the center rod 41 , and the hand wheel 3 further includes an indicator ring 31 inside, and the indicator ring 31 can intuitively display the internal situation of the hand wheel 3 .

[0040] exist Figure 1 to Figure 2 In an optional embodiment, the diaphragm 2 valve includes a handwheel 3 cover, the handwheel cover 5 is connected to the handwheel 3, and an observation groove is provided on the handwheel cover 5. Technicians in this field can observe the indicator ring 31 through the observation groove to understand the rotation of the handwheel 3 and the internal condition of the diaphragm valve.

[0041] It should be noted that the M4 screw 43, the center rod 41, the valve cap 42 and the pressure ring 44 are coaxially arranged.

[0042] The specific operating steps of a diaphragm valve of the utility model are as follows:

[0043] When the diaphragm 2 valve is in the airflow closed state, the hand wheel 3 is turned counterclockwise. Since the hand wheel 3 is connected to the center rod 41, the center rod 41 rotates with the rotation of the hand wheel 3. The inner surface of the valve cap 42 is threadedly connected to the center rod 41. As the center rod 41 rotates, the center rod 41 extends toward the diaphragm side. Because the center rod 41 abuts against the steel ball 7, as the center rod 41 extends, the steel ball 7 moves downward, squeezing the pressure ring 44, so that the pressure ring 44 presses the diaphragm 2, and the diaphragm 2 is deformed, thereby abutting against the second sealing ring 8. The airflow plays a sealing role under the cooperation of the second sealing ring 8 and the diaphragm 2; when the diaphragm valve is in the airflow open state, the hand wheel 3 is turned clockwise, the center rod 41 is lifted upward, the diaphragm 2 valve rebounds, and the airflow flows to the air outlet 14 through the air inlet 12. At the same time, there is a first sealing ring 6 between the center rod 41 and the valve cap 42, which can isolate the airflow from external impurities. This step can ensure the sealing effect of the diaphragm valve and ensure that the diaphragm valve does not leak when opening / closing the gas.

[0044] When a technician in this field needs to repair / clean a fault in the diaphragm valve, the diaphragm valve can be disassembled / installed by quickly removing the handwheel cover 5 and the M4 screw 43, which is relatively convenient.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A diaphragm valve, characterized in that: include: A valve body (1), the valve body (1) comprising an air inlet end (11), an air inlet port (12), an air outlet end (13), an air outlet port (14) and a connecting end (15), the air inlet end (11) being in communication with the air inlet port (12), the air outlet end (13) being in communication with the air outlet port (14), the connecting end (15) being located on the upper side of the valve body (1), the air inlet end (11) being located on one side of the valve body (1), and the air outlet end (13) being located on the other side of the valve body (1); A diaphragm (2), the diaphragm (2) being arranged adjacent to the air inlet (12), the diaphragm (2) being arc-shaped; A functional mechanism (4), the functional mechanism (4) comprising a center rod (41), a valve bonnet (42), an M4 screw (43) and a pressure ring (44), the valve bonnet (42) being threadedly connected to the connection end (15), the valve bonnet (42) being connected to the center rod (41), the M4 screw (43) being arranged at one end of the center rod (41), the pressure ring (44) being arranged adjacent to the other end of the center rod (41), a first sealing ring (6) being provided between the other end of the center rod (41) and the valve bonnet (42), a concave spherical surface being provided in the middle of the pressure ring (44), a steel ball (7) being placed in the concave spherical surface, and the center rod (41) being in contact with the steel ball (7); A hand wheel (3), wherein the hand wheel (3) is connected to the center rod (41).

2. The diaphragm valve according to claim 1, characterized in that: The inner wall of the valve cap (42) is provided with an internal thread, the outer surface of the center rod (41) is provided with an external thread, and the valve cap (42) and the center rod (41) are threadedly connected via the internal thread and the external thread.

3. The diaphragm valve according to claim 1, characterized in that The diaphragm valve comprises a second sealing ring (8), wherein the second sealing ring (8) is arranged adjacent to the air inlet (12).

4. The diaphragm valve according to claim 1, characterized in that: The diaphragm valve comprises a hand wheel cover (5), wherein the hand wheel cover (5) is connected to the hand wheel (3), and an observation slot is provided on the hand wheel (3) cover.

5. The diaphragm valve according to claim 1, characterized in that The hand wheel (3) further comprises an indicator ring (31) inside.

6. The diaphragm valve according to claim 1, characterized in that The M4 screw (43), the center rod (41), the valve cap (42) and the pressure ring (44) are coaxially arranged.

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