CN213393700U

CN213393700U - Differential pressure dry type alarm valve

Info

Publication number: CN213393700U
Application number: CN202022316357.4U
Authority: CN
Inventors: 李川
Original assignee: Tianjin Jiuying Equipment Installation Engineering Co ltd
Current assignee: Tianjin Jiuying Equipment Installation Engineering Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-06-08
Anticipated expiration: 2030-10-19

Abstract

The utility model provides a differential pressure formula dry-type alarm valve. According to the technical scheme, the upper end of a cover plate for controlling a fluid passage is additionally provided with a pressing handle, a sliding rod transversely jacking the pressing handle is connected into one end of a containing cavity, the other end of the containing cavity is communicated with an external gas circuit, and a membrane body is intercepted in the middle of the containing cavity. Based on the structure, under the normal state, because the pressure of the air path is higher, the film body continuously pushes the sliding rod to the pressing handle, so that the pressing handle plays a role in locking the cover plate. When fire occurs and the closed spray head sprays water, the pressure of fluid in the main pipeline is increased, and the pressure in the gas circuit is correspondingly reduced; when a certain critical value is reached, the slide bar is not enough to overcome the lifting force of the press handle, the press handle is lifted immediately, and simultaneously, the fluid in the main pipeline overcomes the downward pressure of the cover plate, so that the cover plate is lifted, and the valve is communicated. Based on the principle, the valve can be opened only when the pressure of the gas pipeline and the pressure of the liquid pipeline change cooperatively, and the micro-motion change of the single pipeline pressure cannot trigger the valve to be opened, so that the reliability of the alarm valve is improved.

Description

Differential pressure dry type alarm valve

Technical Field

The utility model relates to a fire alarm valve technical field, concretely relates to differential pressure formula dry-type alarm valve.

Background

The alarm valve is a control valve of a fire sprinkler system and mainly comprises a dry alarm valve and a wet alarm valve. The wet alarm valve is a one-way valve which only allows water to flow into a water spraying system in a one-way mode and alarms under the specified flow rate. The water pressure of the valve clack is equal before and after the wet alarm valve is normal; when a fire disaster happens, the closed spray head sprays water to cause the two sides to form pressure difference, so that the wet alarm valve is opened.

The dry alarm valve is a one-way valve which is filled with compressed gas at the outlet side and can make water automatically flow into a water spraying system to alarm when the air pressure is lower than a certain value. In principle, the dry alarm valve is basically the same as the wet alarm valve, except that the total pressure on the valve plate of the wet alarm valve is caused by the pressure of pressurized water in a pipe network, and the dry alarm valve is caused by the pressure of pressurized gas in a pipe before the valve and the pressure of pressurized gas in a pipe after the valve, so that the response speed is relatively high. However, since the air pressure is slightly more than the hydraulic pressure, the dry alarm valve has relatively low reliability and may be opened by mistake due to a change in the differential pressure. In this case, if the activation condition of the dry alarm valve can be restricted, it is expected to improve the reliability thereof.

Disclosure of Invention

The utility model discloses aim at to prior art's technical defect, provide a differential pressure formula dry alarm valve to solve present conventional dry alarm valve reliability and remain the technical problem who promotes.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

a differential pressure dry-type alarm valve comprises a valve body, a mounting seat, a bolt, a first sealing ring, a cover plate, a first return spring, a second sealing ring, a containing cavity, a communicating pipe, a guide channel, a sliding rod, a membrane body, a pressing handle, a step part and a second return spring, wherein the mounting seat is arranged on the inner side of an inlet end of the valve body, the mounting seat is fixedly connected with the valve body through the bolt, the first sealing ring is arranged between the mounting seat and the valve body in a padding mode, the cover plate is hinged to the upper end opening of the mounting seat, the first return spring is connected to a hinged shaft of the mounting seat, the second sealing ring is arranged between the cover plate and the upper end opening of the mounting seat in a padding mode, and; the side end of the valve body is provided with a containing cavity, the outer side of the containing cavity is fixedly connected with a communicating pipe, the inner side of the containing cavity is provided with a guide channel, a sliding rod is inserted in the guide channel, a membrane body is intercepted in the containing cavity, and the communicating pipe and the guide channel are respectively positioned at two sides of the membrane body; the lower end of the pressing handle is hinged to the side end of the mounting seat, a second return spring is connected to the hinged shaft of the pressing handle, the upper end of the pressing handle is located on the side of the sliding rod, a step portion is arranged in the middle of the pressing handle, and the step portion pushes against the upper end of the cover plate.

Preferably, the location of the step against the lid is at the furthest end of the lid relative to its hinge axis.

Preferably, a through hole is formed in a side wall of the mounting seat, and a bolt is inserted through the through hole and is fastened to the valve body.

Preferably, an annular groove is formed in the side wall of the mounting seat, and the first sealing ring is located in the annular groove.

Preferably, the end of the slide rod is spherical, and the slide rod is in contact with the press handle via the spherical surface.

In the technical scheme, the valve body is a shell structure of the dry alarm valve; the mounting seat is used for bearing the cover plate and the pressing handle; the bolt is used for fixing the mounting seat and the valve body; the first sealing ring is used for ensuring the sealing between the mounting seat and the valve body; the cover plate is a valve plate structure, when the cover plate is opened, the valve is communicated, and when the cover plate is closed, the valve is cut off; the first return spring continuously gives pressure below the cover plate to enable the cover plate to be in a closed state under a normal state; the second sealing ring is used for ensuring the sealing between the cover plate and the upper port of the mounting seat; the cavity is used for accommodating the membrane body; the communicating pipe is used for communicating with an external gas circuit; under a normal state, the external gas circuit is pressed with pressure, the film body is continuously pressed to one side of the sliding rod, the sliding rod extends out of the guide channel, and the pressing handle is continuously pressed, so that the pressing handle is continuously pressed on the cover plate; the step part on the pressing handle is used for matching with the shape of the tail end of the cover plate; the second return spring continuously gives the pressure handle with the opening force; when a fire disaster occurs and the closed spray head sprays water, the pressure of fluid in the main pipeline (namely the inner space of the mounting seat) is increased, and correspondingly, the pressure in the gas circuit is reduced; because the fluid pressure in the main pipeline is increased, the upward thrust on the cover plate is increased, and meanwhile, because the pressure in the gas circuit is reduced, the acting force of the sliding rod for pressing the pressing handle is reduced; when the change reaches a certain critical point, the sliding rod is not enough to overcome the lifting force of the pressing handle, the pressing handle is lifted immediately, and simultaneously, the fluid in the main pipeline overcomes the downward pressure of the cover plate, so that the cover plate is lifted, and the valve is communicated.

Drawings

FIG. 1 is an internal structural view of the present invention;

FIG. 2 is an external structural view of the present invention;

FIG. 3 is a structural diagram of the mounting base of the present invention;

in the figure:

1. valve body 2, mount pad 3, bolt 4, first sealing washer

5. Cover plate 6, first return spring 7, second sealing ring 8 and containing cavity

9. Communication pipe 10, guide passage 11, slide rod 12, and membrane body

13. A pressing handle 14, a step part 15 and a second return spring.

Detailed Description

The following will describe in detail specific embodiments of the present invention. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1

A differential pressure type dry alarm valve is shown in figures 1-3 and comprises a valve body 1, a mounting seat 2, a bolt 3, a first sealing ring 4, a cover plate 5, a first return spring 6, a second sealing ring 7, a containing cavity 8, a communicating pipe 9, a guide channel 10, a sliding rod 11, a membrane body 12, a pressing handle 13, a step part 14 and a second return spring 15, wherein the mounting seat 2 is arranged on the inner side of an inlet end of the valve body 1, the mounting seat 2 is fixedly connected with the valve body 1 through the bolt 3, the first sealing ring 4 is arranged between the mounting seat 2 and the valve body 1 in a padding mode, the cover plate 5 is hinged to an upper port of the mounting seat 2, the first return spring 6 is connected to a hinging shaft of the mounting seat, the second sealing ring 7 is arranged between the cover plate 5 and an upper port of the mounting seat 2 in a padding mode, and the second sealing ring; the side end of the valve body 1 is provided with a containing cavity 8, the outer side of the containing cavity 8 is fixedly connected with a communicating pipe 9, the inner side of the containing cavity 8 is provided with a guide channel 10, a sliding rod 11 is inserted into the guide channel 10, a membrane body 12 is intercepted in the containing cavity 8, and the communicating pipe 9 and the guide channel 10 are respectively positioned at two sides of the membrane body 12; the lower end of the pressing handle 13 is hinged at the side end of the mounting seat 2, a second return spring 15 is connected at the hinged shaft, the upper end of the pressing handle 13 is positioned at the side of the sliding rod 11, a step part 14 is arranged in the middle of the pressing handle 13, and the step part 14 is pressed against the upper end of the cover plate 5.

The device has the following structural characteristics: the valve body 1 is a shell structure of the dry alarm valve; the mounting seat 2 is used for bearing the cover plate 5 and the pressing handle 13; the bolt 3 is used for fixing the mounting seat 2 and the valve body 1; the first sealing ring 4 is used for ensuring the sealing between the mounting seat 2 and the valve body 1; the cover plate 5 is a valve plate structure, when the cover plate is opened, the valve is communicated, and when the cover plate is closed, the valve is cut off; the first return spring 6 continuously gives the cover plate 5 the following pressure to make it in the closed state under the normal state; the second sealing ring 7 is used for ensuring the sealing between the cover plate 5 and the upper port of the mounting seat 2; the cavity 8 is used for accommodating the membrane body 12; the communicating pipe 9 is used for communicating with an external gas circuit; under the normal state, the external gas circuit is pressed with pressure, the film body 12 is continuously pressed to one side of the sliding rod 11, the sliding rod 11 extends out of the guide channel 10, and the pressing handle 13 is continuously pressed, so that the pressing handle 13 is continuously pressed on the cover plate 5; the step part 14 on the pressing handle 13 is used for matching with the shape of the tail end of the cover plate 5; the second return spring 15 continues to give the pressing handle 13 a force to open; when a fire disaster occurs and the closed spray head sprays water, the pressure of fluid in the main pipeline (namely the inner space of the mounting seat 2) is increased, and correspondingly, the pressure in the gas circuit is reduced; the upward thrust on the cover plate 5 is increased due to the increase of the fluid pressure in the main pipeline, and meanwhile, the acting force of the sliding rod 11 pressing the pressing handle 13 is reduced due to the decrease of the pressure in the air channel; when the change reaches a certain critical point, the sliding rod 11 is not enough to overcome the opening force of the pressing handle 13, the pressing handle 13 is opened immediately, and simultaneously, the fluid in the main pipeline overcomes the downward force of the cover plate 5, so that the cover plate 5 is pushed open, and the valve is communicated.

Example 2

A differential pressure type dry alarm valve is shown in figures 1-3 and comprises a valve body 1, a mounting seat 2, a bolt 3, a first sealing ring 4, a cover plate 5, a first return spring 6, a second sealing ring 7, a containing cavity 8, a communicating pipe 9, a guide channel 10, a sliding rod 11, a membrane body 12, a pressing handle 13, a step part 14 and a second return spring 15, wherein the mounting seat 2 is arranged on the inner side of an inlet end of the valve body 1, the mounting seat 2 is fixedly connected with the valve body 1 through the bolt 3, the first sealing ring 4 is arranged between the mounting seat 2 and the valve body 1 in a padding mode, the cover plate 5 is hinged to an upper port of the mounting seat 2, the first return spring 6 is connected to a hinging shaft of the mounting seat, the second sealing ring 7 is arranged between the cover plate 5 and an upper port of the mounting seat 2 in a padding mode, and the second sealing ring; the side end of the valve body 1 is provided with a containing cavity 8, the outer side of the containing cavity 8 is fixedly connected with a communicating pipe 9, the inner side of the containing cavity 8 is provided with a guide channel 10, a sliding rod 11 is inserted into the guide channel 10, a membrane body 12 is intercepted in the containing cavity 8, and the communicating pipe 9 and the guide channel 10 are respectively positioned at two sides of the membrane body 12; the lower end of the pressing handle 13 is hinged at the side end of the mounting seat 2, a second return spring 15 is connected at the hinged shaft, the upper end of the pressing handle 13 is positioned at the side of the sliding rod 11, a step part 14 is arranged in the middle of the pressing handle 13, and the step part 14 is pressed against the upper end of the cover plate 5. The point of pressing of the step 14 against the cover 5 is located at the most distal end of the cover 5 with respect to its hinge axis. A through hole is arranged on the side wall of the mounting seat 2, and a bolt 3 penetrates through the through hole and is tightly connected with the valve body 1. An annular groove is formed in the side wall of the mounting seat 2, and the first sealing ring 4 is located in the annular groove. The end of the slide rod 11 is spherical, and the slide rod 11 contacts the pressing handle 13 with the spherical surface.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A differential pressure dry alarm valve is characterized by comprising a valve body (1), a mounting seat (2), a bolt (3), a first sealing ring (4), a cover plate (5), a first reset spring (6), a second sealing ring (7), a containing cavity (8), a communicating pipe (9), a guide channel (10), a sliding rod (11), a membrane body (12), a pressing handle (13), a step part (14) and a second reset spring (15), wherein the mounting seat (2) is arranged on the inner side of an inlet end of the valve body (1), the mounting seat (2) is fixedly connected with the valve body (1) through the bolt (3), the first sealing ring (4) is arranged between the mounting seat (2) and the valve body (1), the cover plate (5) is hinged at the upper end opening of the mounting seat (2), the first reset spring (6) is connected at a hinged shaft, the second sealing ring (7) is arranged between the cover plate (5) and the upper end opening of the mounting seat (2), the second sealing ring (7) is fixedly connected with the cover plate (5); the side end of the valve body (1) is provided with a containing cavity (8), the outer side of the containing cavity (8) is fixedly connected with a communicating pipe (9), the inner side of the containing cavity (8) is provided with a guide channel (10), a sliding rod (11) is inserted into the guide channel (10), a membrane body (12) is intercepted in the containing cavity (8), and the communicating pipe (9) and the guide channel (10) are respectively positioned on two sides of the membrane body (12); the lower end of the pressing handle (13) is hinged to the side end of the mounting seat (2), a second return spring (15) is connected to the hinged shaft of the pressing handle, the upper end of the pressing handle (13) is located on the side of the sliding rod (11), a step part (14) is arranged in the middle of the pressing handle (13), and the step part (14) is pressed against the upper end of the cover plate (5).

2. A differential dry alarm valve according to claim 1, characterised in that the point of pressure of the step (14) against the cover (5) is located at the furthest end of the cover (5) with respect to its hinge axis.

3. The differential pressure dry alarm valve of claim 1, wherein a through hole is provided on the side wall of the mounting seat (2), and the bolt (3) penetrates through the through hole and is fastened to the valve body (1).

4. A differential pressure dry alarm valve according to claim 1 characterised in that an annular groove is provided in the side wall of the mounting seat (2) in which the first sealing ring (4) is located.

5. The differential pressure dry alarm valve of claim 1 wherein the end of the sliding rod (11) is spherical and the sliding rod (11) contacts the press handle (13) with the spherical surface.