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CN-122014859-A - Pressure-adjustable fire-fighting stop valve

CN122014859ACN 122014859 ACN122014859 ACN 122014859ACN-122014859-A

Abstract

The invention discloses an adjustable pressure type fire control stop valve, which comprises an upper valve body, wherein an end cover is fixedly arranged above the upper valve body, a butt joint pipe is fixedly arranged on the side surface of the upper valve body by using a flange, a sealing valve block is arranged in the middle position inside the upper valve body, the purpose of opening and closing the valve is achieved by lifting a sealing valve block plugging channel, a hollow cylindrical lower valve body is fixedly arranged below the upper valve body, a piston plate which is attached to the lower valve body and slides is arranged at the upper end inside the lower valve body, and a connecting rod is fixedly arranged between the piston plate and the sealing valve block. This but pressure regulating formula fire control stop valve when the valve is opened, utilizes the inside extrusion spring of lower valve body to promote the limiting plate and upwards move to make and go up the limiting plate and drive the synchronous upward movement of piston plate, utilize the inside cavity of piston plate extrusion lower valve body, apply pressure to the inside valve body through the through-hole, thereby reach the purpose of pressurization, and can adjust the pressurization degree through adjustment mechanism, reach the purpose of adjusting the pressure size.

Inventors

  • FENG YUZHU
  • WANG HOUQIAN
  • LIU SHUOLEI

Assignees

  • 远大阀门集团有限公司

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The utility model provides a but pressure regulating formula fire control stop valve, includes upper valve body (1) of top fixed mounting end cover (2), and upper valve body (1) side utilizes flange fixed mounting to take over (3), its characterized in that still includes: a sealing valve block (6) is arranged in the middle position inside the upper valve body (1), and the purpose of opening and closing the valve is achieved by lifting and plugging the channel through the sealing valve block (6); A hollow cylindrical lower valve body (7) is fixedly arranged below the upper valve body (1), a piston plate (9) which is attached to the lower valve body (7) and slides is arranged at the upper end inside the lower valve body (7), a connecting rod (8) is fixedly arranged between the piston plate (9) and the sealing valve block (6), a through hole (10) communicated with the lower valve body (7) is formed at the lower end of the upper valve body (1), an adjusting mechanism is arranged inside the lower valve body (7), and the adjusting mechanism applies pressure to the piston plate (9) to enable the piston plate (9) to be pressurized in the upper valve body (1); The sealing valve block (6) is characterized in that a sealing ring (18) is fixedly arranged on the outer surface of the sealing valve block (6), and an air blowing mechanism for blowing air into the sealing ring (18) is arranged on the upper surface of the sealing valve block (6).
  2. 2. The pressure-adjustable fire-fighting stop valve according to claim 1, wherein the adjusting mechanism comprises an upper limiting plate (11) and a lower limiting plate (12) which are arranged inside the lower valve body (7).
  3. 3. The pressure-adjustable fire-fighting stop valve according to claim 2, wherein the upper limiting plate (11) is fixedly arranged at the lower end of the piston plate (9), and the lower limiting plate (12) and the lower valve body (7) form an up-down sliding structure.
  4. 4. The adjustable pressure fire control stop valve according to claim 3, wherein an extrusion spring (13) is fixedly arranged between the upper limiting plate (11) and the lower limiting plate (12), an adjusting bolt (14) for driving the lower limiting plate (12) to move up and down is arranged in an internal thread of the lower limiting plate (12), the adjusting bolt (14) is rotationally connected with the lower valve body (7), and an adjusting knob (15) positioned outside the lower valve body (7) is fixedly arranged at the lower end of the adjusting bolt (14).
  5. 5. The pressure-adjustable fire-fighting stop valve according to claim 4, wherein the left side and the right side of the lower limiting plate (12) are provided with limiting sliding grooves (16), and the limiting sliding grooves (16) and limiting strips (17) fixedly arranged on the inner wall of the lower valve body (7) are embedded and slide.
  6. 6. The adjustable pressure type fire control stop valve according to claim 1, wherein an installation seat (22) is fixedly installed on the upper surface of the butt joint pipe (3), and a pressure valve for monitoring the internal pressure of the upper valve body (1) in real time is installed after a sealing plug in the installation seat (22) is removed.
  7. 7. The pressure-adjustable fire-fighting stop valve according to claim 1, wherein the air-blowing mechanism comprises a rubber diaphragm (21) fixedly arranged in the middle of the upper surface of the sealing valve block (6), and the rubber diaphragm (21) is made of self-rebound elastic rubber.
  8. 8. The pressure-adjustable fire-fighting stop valve according to claim 7, wherein an inner cavity (19) for storing air is formed in the sealing valve block (6), and the inner cavity (19) is communicated with the rubber diaphragm (21).
  9. 9. The pressure-adjustable fire-fighting stop valve according to claim 8, wherein the side surface of the sealing valve block (6) is provided with a communication hole (20) corresponding to the sealing ring (18), and the sealing ring (18) is communicated with the inner cavity (19) through the communication hole (20).
  10. 10. The adjustable pressure fire control stop valve according to claim 9, wherein the position of the sealing valve block (6) corresponds to the position of the opening and closing valve rod (4) up and down, the lower end of the opening and closing valve rod (4) is fixedly provided with an extrusion block (5) for extruding the rubber diaphragm (21), and the rubber diaphragm (21) is pressurized into the inner cavity (19) when being extruded.

Description

Pressure-adjustable fire-fighting stop valve Technical Field The invention relates to the technical field of fire control stop valves, in particular to an adjustable pressure type fire control stop valve. Background The fire control stop valve is a manual control valve arranged in a fire control pipeline system, such as a fire hydrant system, an automatic water spraying fire extinguishing system and the like, and has the core function of manually closing the water source when the downstream fire control equipment needs to be overhauled or replaced, so that the normal water supply of other fire control areas of the whole building can not be influenced. As in the prior art, chinese patent application number CN201520277938.8 discloses a fire control stop valve, be equipped with valve body water inlet and valve body delivery port on the valve body, there is the upper valve rod through threaded connection in the valve body, be fixed with the hand wheel at the upper end of upper valve rod, the hypomere of upper valve rod with the upper segment of hypomere is pegged graft together, is equipped with the spring between upper valve rod and hypomere, is fixed with the valve plate at the lower tip of hypomere, installs spacing pull pin on the valve body, has seted up the spacing groove on the upper valve rod, valve body water inlet and valve body delivery port are in 90 degrees orientations, can change the direction that the medium flows, can reduce the risk that causes personal safety, and the piece is opened slowly, makes pressure rise slowly, has reduced the pressure when just opening and has risen suddenly to play the guard action to personal safety. In the prior art, china patent with the application number of CN201510540286.7 discloses a spring fire control stop valve and a quick opening and closing device, wherein the spring fire control stop valve comprises a valve body, a support, an end cover, an upper valve rod, a spring, a lower valve rod and a valve core, the quick opening and closing device comprises a spring clamp and a high-pressure water gun for fire control, the lower end of the upper valve rod and the upper end of the lower valve rod are respectively arranged in a spring cavity in the support and are acted by spring force, the upper end of the upper valve rod is positioned outside the spring cavity, the lower end of the lower valve rod is connected with the valve core and is pressed against a valve sealing plane of the valve body by a valve core plane to form a valve closing state, the spring clamp is fixedly arranged at the upper part of the stop valve, the upper end of the upper valve rod penetrates through a hole at the bottom of the spring clamp to stretch into the clamp, and the high-pressure water gun for fire control is clamped in the spring clamp and butts against the top end of the upper valve rod. In the prior art, chinese patent application number CN202122345609.0 discloses a novel stop valve, including the stop valve body, water inlet and delivery port have been seted up on the stop valve body, the inside sealed disk seat that still fixedly is provided with of stop valve body, the stop valve body has the stop valve gap through bolted connection, be provided with the stop valve regulation pole on the stop valve cap, stop valve regulation pole and stop valve gap junction are provided with first screw thread, and stop valve regulation pole one end extends the stop valve gap outside, and the other end extends to inside the stop valve body. In combination with the above materials, it is known that the stop valve in the prior art is used in a water supply pipeline of a fire protection system, and in the actual use process, the defect of the fire protection stop valve in the market at present is mainly that the outlet pressure cannot be adjusted, because the stop valve may not provide stable adjusted output pressure when in use due to the design reason, the design structure of the valve is usually optimized for the outlet of the flow passage, and when the demand pressure changes, the outlet pressure may not be adjusted, so that the outlet pressure cannot change along with the change of fire. Disclosure of Invention The invention aims to provide an adjustable pressure type fire control stop valve, which aims to solve the problem that the pressure cannot be adjusted in the background technology. The pressure-adjustable fire-fighting stop valve comprises an upper valve body, an end cover is fixedly arranged above the upper valve body, a butt joint pipe is fixedly arranged on the side surface of the upper valve body through a flange, a sealing valve block is arranged in the middle of the interior of the upper valve body, the purpose of opening and closing the valve is achieved through lifting and plugging a channel through the sealing valve block, a hollow cylindrical lower valve body is fixedly arranged below the upper valve body, a piston plate which is in fit sliding with the lower valve body is