Diaphragm type pipeline valve

Abstract

The utility model relates to the technical field of valves, and particularly discloses a diaphragm type pipeline valve which comprises a valve body, a valve cavity, a first flow channel and a second flow channel are arranged in the valve body, a partition block is arranged between the first flow channel and the second flow channel, a valve clack is movably arranged in the valve cavity, a diaphragm is sleeved on the valve clack, the valve clack is connected with a piston, and the piston is connected with a valve cap. A pressing ring is arranged between the valve bonnet and the valve body, the outer surrounding edge of the diaphragm is clamped between the pressing ring and the valve body, and the inner surrounding edge of the diaphragm is clamped between the piston and the valve clack. The working state of the valve element can be controlled by turning the hand wheel, the opening and closing function of the flow channel can be achieved without cooperation of a spring and the valve element, the flow of the valve channel is stable, and regular spring replacement operation is avoided; the partition block is arranged between the first flow channel and the second flow channel, so that fluid flowing into the valve cavity through the first flow channel or the second flow channel is guided by the partition block firstly, the influence that the fluid directly impacts the valve element is reduced, and the service life of the valve element is prolonged.

Description

Technical Field

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

[0002] Diaphragm valves are commonly used in power plants, chemical plants, medical aviation and other industries. With the rapid development of various industries, high-purity gas control is becoming more and more important in applications, and the demand for convenience, safety and stability of diaphragm valves has greatly increased.

[0003] A Chinese patent CN205824260U discloses a diaphragm valve, including a valve body with a T-shaped mounting hole; a valve core seat is arranged in the valve body, and a spring is arranged between the valve core seat and the valve body; a sealing gasket, a diaphragm, a drag reduction cushion seat and a drag reduction cushion are arranged on the upper end of the valve core seat in sequence; a compression adjustment nut wraps around the sealing gasket, the diaphragm, the drag reduction cushion seat and the drag reduction cushion; a brass valve stem or a stainless steel valve stem is installed in the compression adjustment nut; the compression adjustment nut is threadedly connected to the valve body, and has the characteristics of simple structure and easy operation;

[0004] After using the diaphragm valve, we found that the flow channel is opened and closed mainly by the spring and the valve core. After long-term use, the elasticity of the spring is unstable and unreliable, resulting in unstable flow in the valve channel. The spring needs to be replaced regularly to ensure the stability of the valve core.

[0005] Therefore, we provide a diaphragm pipeline valve that does not require the use of a spring to match the valve core, thereby ensuring the stability of the valve channel flow and reducing the replacement frequency of valve body parts. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] The problem to be solved by the utility model is to provide a diaphragm type pipeline valve to overcome the defects in the prior art.

[0008] (II) Technical solution

[0009] In order to solve the technical problem, the utility model provides a diaphragm pipeline valve, comprising a valve body connected to a pipeline, a valve cavity and a first flow channel and a second flow channel are arranged in the valve body, a spacer is arranged between the first flow channel and the second flow channel, the first flow channel is communicated with the second flow channel through the valve cavity, a valve disc is movably arranged in the valve cavity, a diaphragm is sleeved on the valve disc, the valve disc is connected to a piston, and the piston is connected to a valve cap installed on the valve body;

[0010] A pressure ring is arranged between the valve cap and the valve body, the outer peripheral edge of the diaphragm is clamped between the pressure ring and the valve body, and the inner peripheral edge of the diaphragm is clamped between the piston and the valve disc;

[0011] When the piston drives the valve flap to move toward the spacer block, the piston and the valve flap drive the inner peripheral edge of the diaphragm to move toward the spacer block, and the valve core of the valve flap contacts the spacer block and blocks the first flow channel. When the piston drives the valve flap to move away from the spacer block, the piston and the valve flap drive the inner peripheral edge of the diaphragm to move away from the spacer block, and the first flow channel is connected with the second flow channel through the valve cavity.

[0012] Furthermore, the valve flap is in an inverted T-shape, the piston is in a stem shape, the piston is provided with a first threaded hole, the valve flap is connected to the piston through the first threaded hole, and the inner peripheral edge of the diaphragm is clamped between the lower end of the piston and the lateral end of the valve flap.

[0013] Furthermore, a mounting hole is provided in the valve body, the valve cap and the pressure ring are arranged in the mounting hole, and the pressure ring is located between the outer peripheral edge of the diaphragm and the lower end of the valve cap.

[0014] Furthermore, a second O-ring is arranged between the valve bonnet and the wall of the mounting hole of the valve body, a second threaded hole and a sliding hole are opened in the valve bonnet, the second threaded hole of the valve bonnet is connected to the valve stem, the sliding hole of the valve bonnet is slidably connected to the piston, one end of the valve stem is L-shaped, and the L-shaped end of the valve stem cooperates with the upper end of the piston.

[0015] Furthermore, a steel ball is hinged on the valve stem, and the steel ball is connected to the top end of the piston.

[0016] Furthermore, a third O-ring is connected between the piston and the wall of the sliding hole of the valve cap, and a first O-ring is arranged between the valve stem and the valve cap.

[0017] Furthermore, the valve stem is connected to a handwheel via a locking nut, and a handwheel cover is connected to the handwheel.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the diaphragm type pipeline valve provided by the utility model has the following beneficial effects:

[0020] 1. The utility model can control the working state of the valve core only by turning the knob handwheel, and can achieve the opening and closing function of the flow channel without the need for a spring to cooperate with the valve core, so that the flow of the valve channel is stable, the valve body function is stable and reliable, and there is no need to regularly replace the spring, which reduces the operation of the operator to inspect and maintain the valve body.

[0021] 2. In addition to arranging a diaphragm in the valve cavity, the utility model also arranges a first O-ring, a second O-ring and a third O-ring at the connection between the valve body and the valve cap and the piston and the valve stem, respectively, to further improve the sealing performance of the valve body.

[0022] 3. The utility model arranges a spacer between the first flow channel and the second flow channel, so that the fluid flowing from the first flow channel or the second flow channel to the valve cavity is first guided by the spacer, reducing the situation where the fluid directly impacts the valve core, reducing the situation where the fluid directly impacts the valve core to cause cavitation and affect the sealing performance of the valve core, which helps to extend the service life of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 This is a structural schematic diagram of a diaphragm type pipeline valve of the utility model;

[0025] Figure 2 The utility model is a diaphragm type pipeline valve Figure 1 Enlarged view of point A in the middle;

[0026] The names of the components corresponding to the various figure marks in the figure are: 1. handwheel cover; 2. locking nut; 3. handwheel; 4. valve stem; 5. first O-ring; 6. valve cap; 7. steel ball; 8. piston; 9. second O-ring; 10. third O-ring; 11. pressure ring; 12. diaphragm; 13. valve body; 14. valve disc; 15. valve core; 16. first flow channel; 17. second flow channel; 18. spacer block; 19. valve chamber. DETAILED DESCRIPTION

[0027] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0033] See also Figure 1 to Figure 2 The utility model provides a diaphragm pipeline valve, including a valve body 13 connected to a pipeline, a valve cavity 19, a first flow channel 16 and a second flow channel 17 are arranged in the valve body 13, a spacer 18 is arranged between the first flow channel 16 and the second flow channel 17, the first flow channel 16 is connected with the second flow channel 17 through the valve cavity 19, a valve disc 14 is movably arranged in the valve cavity 19, a diaphragm 12 is sleeved on the valve disc 14, the valve disc 14 is connected to a piston 8, and the piston 8 is connected to a valve cap 6 installed on the valve body 13; a pressure ring 11 is arranged between the valve cap 6 and the valve body 13, and the outer edge of the diaphragm 12 is clamped Between the pressure ring 11 and the valve body 13, the inner edge of the diaphragm 12 is clamped between the piston 8 and the valve disc 14; when the piston 8 drives the valve disc 14 to move toward the spacer block 18, the piston 8 and the valve disc 14 drive the inner edge of the diaphragm 12 to move toward the spacer block 18, and the valve core 15 of the valve disc 14 contacts the spacer block 18 and blocks the first flow channel 16. When the piston 8 drives the valve disc 14 to move away from the spacer block 18, the piston 8 and the valve disc 14 drive the inner edge of the diaphragm 12 to move away from the spacer block 18, and the first flow channel 16 is connected with the second flow channel 17 through the valve cavity 19.

[0034] See also Figure 1 to Figure 2The valve disc 14 is in an inverted T shape, the piston 8 is in a dry shape, the piston 8 is provided with a first threaded hole, the valve disc 14 is connected to the piston 8 through the first threaded hole, the inner peripheral edge of the diaphragm 12 is clamped between the lower end of the piston 8 and the lateral end of the valve disc 14, a mounting hole is provided in the valve body 13, the valve bonnet 6 and the pressure ring 11 are arranged in the mounting hole, the pressure ring 11 is located between the outer peripheral edge of the diaphragm 12 and the lower end of the valve bonnet 6, a second O-ring 9 is provided between the valve bonnet 6 and the mounting hole wall of the valve body 13, and a first O-ring 9 is provided in the valve bonnet 6. Two threaded holes and a sliding hole, the second threaded hole of the valve bonnet 6 is connected to the valve stem 4, the sliding hole of the valve bonnet 6 is slidably connected to the piston 8, one end of the valve stem 4 is L-shaped, and the L-shaped end of the valve stem 4 cooperates with the upper end of the piston 8; a steel ball 7 is hinged on the valve stem 4, the steel ball 7 is connected to the top of the piston 8, a third O-ring 10 is connected between the piston 8 and the wall of the sliding hole of the valve bonnet 6, a first O-ring 5 is arranged between the valve stem 4 and the valve bonnet 6, the valve stem 4 is connected to the handwheel 3 through a locking nut 2, and the handwheel 3 is connected to a handwheel cover 1.

[0035] The diaphragm pipeline valve provided in the present embodiment can control the working state of the valve core 15 by turning the knob handwheel 3, and can achieve the opening and closing function of the flow channel without the need for a spring to cooperate with the valve core 15, so that the flow of the valve channel is stable, the function of the valve body 13 is stable and reliable, and there is no need to regularly replace the spring operation, which reduces the operation of the operator to inspect and maintain the diaphragm valve; in addition to arranging the diaphragm 12 in the valve cavity 19, the utility model also arranges a first O-ring 5, a second O-ring 9 and a third O-ring 10 at the connection between the valve body 13 and the valve cap 6 and the piston 8 and the valve stem 4, respectively, to further improve the sealing performance of the valve body 13; the utility model arranges a spacer block 18 between the first flow channel 16 and the second flow channel 17, so that the fluid flowing from the first flow channel 16 or the second flow channel 17 to the valve cavity 19 is first guided by the spacer block 18, thereby reducing the situation where the fluid directly impacts the valve core 15, and reducing the situation where the fluid directly impacts the valve core 15 to cause cavitation and affect the sealing performance of the valve core 15, which helps to extend the service life of the valve core 15.

[0036] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0037] 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 pipeline valve, comprising a valve body (13) connected to a pipeline, characterized in that: The valve body (13) is provided with a valve cavity (19), a first flow channel (16), and a second flow channel (17); a spacer (18) is provided between the first flow channel (16) and the second flow channel (17); the first flow channel (16) is communicated with the second flow channel (17) through the valve cavity (19); a valve flap (14) is movably provided in the valve cavity (19); a diaphragm (12) is sleeved on the valve flap (14); the valve flap (14) is connected to a piston (8); and the piston (8) is connected to a valve cap (6) mounted on the valve body (13); A pressure ring (11) is provided between the valve cap (6) and the valve body (13), the outer peripheral edge of the diaphragm (12) is clamped between the pressure ring (11) and the valve body (13), and the inner peripheral edge of the diaphragm (12) is clamped between the piston (8) and the valve disc (14); When the piston (8) drives the valve flap (14) to move in a direction close to the spacer (18), the piston (8) and the valve flap (14) drive the inner peripheral edge of the diaphragm (12) to move in a direction close to the spacer (18), and the valve core (15) of the valve flap (14) contacts the spacer (18) and blocks the first flow channel (16). When the piston (8) drives the valve flap (14) to move in a direction away from the spacer (18), the piston (8) and the valve flap (14) drive the inner peripheral edge of the diaphragm (12) to move in a direction away from the spacer (18), and the first flow channel (16) is connected to the second flow channel (17) through the valve cavity (19).

2. The diaphragm type pipeline valve according to claim 1, characterized in that: The valve flap (14) is in an inverted T-shape, the piston (8) is in a stem-shaped shape, the piston (8) is provided with a first threaded hole, the valve flap (14) is connected to the piston (8) via the first threaded hole, and the inner peripheral edge of the diaphragm (12) is clamped between the lower end of the piston (8) and the lateral end of the valve flap (14).

3. The diaphragm type pipeline valve according to claim 1, characterized in that: The valve body (13) is provided with a mounting hole, the valve cap (6) and the pressure ring (11) are arranged in the mounting hole, and the pressure ring (11) is located between the outer edge of the diaphragm (12) and the lower end of the valve cap (6).

4. The diaphragm pipeline valve according to claim 1, characterized in that: A second O-ring (9) is arranged between the valve bonnet (6) and the wall of the mounting hole of the valve body (13); a second threaded hole and a sliding hole are provided in the valve bonnet (6); the second threaded hole of the valve bonnet (6) is connected to a valve stem (4); the sliding hole of the valve bonnet (6) is slidably connected to the piston (8); one end of the valve stem (4) is L-shaped; the L-shaped end of the valve stem (4) cooperates with the upper end of the piston (8).

5. The diaphragm pipeline valve according to claim 4, characterized in that: A steel ball (7) is hinged on the valve stem (4), and the steel ball (7) is connected to the top end of the piston (8).

6. The diaphragm type pipeline valve according to claim 4, characterized in that: A third O-ring (10) is connected between the piston (8) and the sliding hole wall of the valve cap (6), and a first O-ring (5) is arranged between the valve stem (4) and the valve cap (6).

7. The diaphragm type pipeline valve according to claim 4, characterized in that: The valve stem (4) is connected to a hand wheel (3) via a locking nut (2), and a hand wheel cover (1) is connected to the hand wheel (3).

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