CN214367775U

CN214367775U - Pressure-balancing pressure-reducing valve

Info

Publication number: CN214367775U
Application number: CN202023106971.4U
Authority: CN
Inventors: 张翼鹏
Original assignee: Shibaokang Environmental Electrical Appliances Nanjing Co ltd
Current assignee: Shibaokang Environmental Electrical Appliances Nanjing Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-10-08
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a pressure-balanced pressure reducing valve, which adopts a spring, a sleeve, a movable rod and a current-limiting block to be combined with the pressure reducing valve, when a screw thread pushing rod pushes the spring to drive the movable rod and the current-limiting block arranged on the surface of the movable rod to be pressed downwards, the bottom of the movable rod slides in a movable cavity arranged in the sleeve, so that the downward pressure of the movable rod is kept balanced, and the current-limiting block is prevented from shaking under the impact of liquid; meanwhile, the forward threads, the forward and reverse threads, the first nut and the second nut are combined with the pressure reducing valve, when the first nut is loosened under the action of external force, the second nut and the first nut are opposite in movement direction, the purpose of preventing the first nut from loosening is achieved, and the connecting structure of the pressure reducing valve is optimized; the pressure balance pressure reducing valve can improve the accuracy of pressure balance adjustment, and solves the problem that bolts arranged in the traditional pressure balance pressure reducing valve are easy to loosen under external factors such as vibration and the like.

Description

Pressure-balancing pressure-reducing valve

Technical Field

The utility model belongs to the technical field of the relief pressure valve, in particular to pressure balance's relief pressure valve.

Background

The pressure reducing valve is a valve which reduces the inlet pressure to a certain required outlet pressure through regulation and leads the outlet pressure to be automatically kept stable by relying on the energy of the medium. From the viewpoint of hydrodynamics, the pressure reducing valve is a throttling element with variable local resistance, namely, the flow speed and the kinetic energy of fluid are changed by changing the throttling area to cause different pressure losses, thereby achieving the purpose of pressure reduction. Then, the fluctuation of the pressure behind the valve is balanced with the spring force by means of the regulation of the control and regulation system, so that the pressure behind the valve is kept constant within a certain error range.

The existing pressure reducing valve has various structures, but has the following problems:

(1) in a traditional pressure-balanced pressure reducing valve, a pressure plate is driven by a spring to play a role in limiting and reducing pressure, so that the precision of pressure balance adjustment is poor;

(2) when the traditional pressure-balanced pressure reducing valve is connected with a pipeline through the arranged connecting pipeline, the arranged bolt is easy to loosen under external factors such as vibration and the like, so that the connecting structure of the pressure reducing valve is poor.

Based on the above analysis, the existing pressure reducing valve structure needs to be improved, and the scheme is generated accordingly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pressure balance's relief pressure valve can improve the precision that pressure balance adjusted, solves the relatively poor problem of traditional relief pressure valve to pressure balance adjustment's precision.

Another object of the utility model is to provide a pressure balance's relief pressure valve, the bolt that can solve traditional pressure balance's relief pressure valve setting is not hard up problem under external factors such as vibrations easily to reach the effect that improves the connection structure of this relief pressure valve.

In order to achieve the above purpose, the solution of the present invention is:

a pressure-balanced pressure reducing valve comprises a valve body, a driving cavity, a circulation pipeline and connecting flanges, wherein the driving cavity is arranged at the bottom of the valve body, the bottom of the driving cavity is movably connected with the circulation pipeline, and the connecting flanges are arranged at the left end and the right end of the circulation pipeline;

the circulating pipeline comprises a water inlet pipeline and a water outlet pipeline, the inner wall of the circulating pipeline is provided with a flow guide block, and the surface of the flow guide block is provided with a circulating groove; the bottom of the inner wall of the circulation pipeline is provided with a sleeve, and the top of the sleeve is provided with a movable cavity;

the top of the driving cavity is provided with a movable hole, the inner wall of the movable hole is movably connected with a threaded pushing rod, the threaded pushing rod penetrates through the movable hole, the bottom of the threaded pushing rod is connected with a first pressing plate, and the bottom of the first pressing plate is connected with a second pressing plate through a spring; the bottom of the second pressing plate is connected with a movable rod, the movable rod penetrates through the circulation groove and then is in sliding connection with the inner wall of the movable cavity, and a flow limiting block is arranged on the outer surface, located outside the movable cavity, of the movable rod.

The side surface of the connecting flange is provided with a stud through a threaded hole, the stud is provided with a forward thread and a forward thread, the forward thread of the stud is in threaded connection with the connecting flange and a first nut, and the first nut is positioned on the outer side of the connecting flange; the positive and negative screw thread of the stud is connected with a second nut in a threaded manner, and the positive and negative screw thread can be connected with the first nut in a threaded manner.

The top of the water inlet pipeline and the top of the water outlet pipeline are both provided with pressure gauges.

The inner wall of the circulation groove is provided with a rubber plug.

After the scheme is adopted, the utility model discloses compare prior art's beneficial effect is:

(1) the utility model provides a pressure balance's relief pressure valve adopts spring, sleeve, movable rod and current-limiting piece and this relief pressure valve to combine, when the current-limiting piece that screw propulsion pole promoted the spring and drives the movable rod and its surface setting pushed down, the activity cavity that the bottom of movable rod was seted up in the sleeve slides, makes the holding down force of movable rod balanced, avoids the current-limiting piece to produce under the impact of liquid and rocks to keep pressure balance more accurately.

(2) The utility model provides a pressure balance's relief pressure valve sets up through adopting forward screw thread, forward and reverse screw thread, first nut and second nut and this relief pressure valve combination, when first nut is not hard up under the exogenic action, second nut and first nut opposite direction of motion play locking purpose to first nut, and this bolted construction's practicality is stronger, has optimized the connection structure of this relief pressure valve.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the connection structure between the connecting flange and the stud according to the present invention;

FIG. 3 is a schematic view of the connection structure of the screw pushing rod, the spring and the second pressing plate of the present invention;

fig. 4 is a schematic view of the connection structure of the middle sleeve, the movable rod and the flow limiting block of the present invention.

Reference numerals:

1. a valve body; 2. a drive chamber;

3. a flow conduit; 301. a water inlet pipe; 302. a water outlet pipeline;

303. a flow guide block; 304. a circulation tank; 305. a rubber plug;

5. a connecting flange;

6. a stud; 601. a positive thread; 602. forward and reverse threads;

603. a first nut; 604. a second nut;

7. a movable hole; 8. a threaded push rod; 9. a first platen;

10. a spring; 11. a second platen; 12. a sleeve;

13. a movable chamber; 14. a movable rod; 15. a flow limiting block; 16. and a pressure gauge.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 4, the utility model provides a pressure balance's relief pressure valve, including valve body 1, drive cavity 2, runner pipe 3 and flange 5, drive cavity 2 has been seted up to valve body 1's bottom, and the fixing bolt swing joint that sets up has runner pipe 3 in drive cavity 2's bottom, and both ends all are provided with flange 5 about runner pipe 3.

As shown in fig. 1 and 4, the flow channel 3 includes an inlet channel 301 and an outlet channel 302, a flow guide block 303 is disposed on an inner wall of the flow channel 3, a flow channel 304 is disposed on a surface of the flow guide block 303, and a rubber plug 305 is disposed on an inner wall of the flow channel 304.

As shown in fig. 3, a movable hole 7 is formed in the top of the driving chamber 2, a threaded push rod 8 is movably connected to the inner wall of the movable hole 7, the threaded push rod 8 penetrates through the movable hole 7, a first pressing plate 9 is fixedly connected to the bottom of the threaded push rod 8, a spring 10 is arranged at the bottom of the first pressing plate 9, and a second pressing plate 11 is fixedly connected to the bottom of the spring 10.

A sleeve 12 is arranged at the bottom of the inner wall of the circulation pipeline 3, a movable chamber 13 is arranged at the top of the sleeve 12, a movable rod 14 is connected to the inner wall of the movable chamber 13 in a sliding manner, and the movable rod 14 penetrates through the circulation groove 304 and is fixedly connected with the bottom of the second pressing plate 11; in addition, the outer surface of the movable rod 14 is provided with a flow restriction piece 15. When the pressure-balanced pressure reducing valve is used, the threaded push rod 8 is controlled to move up and down in the internal thread of the driving cavity 2, and under the pushing action of the first pressure plate 9, the spring 10 drives the second pressure plate 11 to move up and down, so that the bottom of the movable rod 14 slides in the movable cavity 13 formed in the sleeve 12, the downward pressure of the movable rod 14 is kept balanced, and the flow limiting block 15 is prevented from shaking under the impact of liquid; in the sliding process, water flows into the water outlet pipeline 302 through the flow groove 304 formed in the flow guide block 303, and the distance between the flow guide block 15 and the flow guide groove 304 is changed, so that the flow rate of the water is changed, a pressure reduction effect is achieved, and the pressure balance of the water flow is accurately kept.

As a preferred embodiment of the present invention, the top of the water inlet pipe 301 and the water outlet pipe 302 is provided with a pressure gauge 16, and the pressure gauge 16 is convenient for the user to check the pressure of the flowing water in the water inlet pipe 301 and the water outlet pipe 302.

As a preferred embodiment of the present invention, as shown in fig. 2, the stud 6 is disposed on the side of the connecting flange 5 through the disposed threaded hole, the stud 6 includes a forward thread 601 and a forward and reverse thread 602, the connecting flange 5 and a first nut 603 are threadedly connected to the forward thread 601 of the stud 6, the first nut 603 is located on the outer side of the connecting flange 5, a second nut 604 is threadedly connected to the forward and reverse thread 602 of the stud 6, and the forward and reverse thread 602 of the stud 6 can be threadedly connected to the first nut 603, when the stud 6 threadedly connected to the connecting flange 5 is loosened by the influence of vibration or other external factors, the threaded connection between the first nut 603 and the forward thread 601 is loosened, since the forward thread 601 and the forward and reverse threads 602 are disposed on the stud 3 in the opposite direction, when the first nut 603 is moved due to the loosening, the second nut 604 is moved in the opposite direction, the connection between the first nut 603 and the connecting flange 5 is more tight, and the second nut 604 can fasten the first nut 603 and the connecting flange 5, so as to prevent the first nut 603 from loosening.

The utility model discloses a theory of operation is:

as shown in fig. 1-4, when the pressure-balanced pressure reducing valve works, the threaded push rod 8 is controlled to move up and down in the internal thread of the driving chamber 2, so that the spring 10 drives the second pressure plate 11 to move up and down, thereby the bottom of the movable rod 14 slides in the movable chamber formed by the sleeve 13, the downward pressure of the movable rod 14 is kept balanced, the flow limiting block 15 is prevented from shaking under the impact of liquid, during the sliding process, water flows into the water outlet pipe 302 through the flow groove 304 formed in the flow guiding block 303, the flow rate of the water is changed, the pressure reducing effect is achieved, when the stud 6 in threaded connection with the connecting flange 5 is loosened due to the influence of vibration or other external factors, because the forward thread 601 arranged on the stud 3 is opposite to the forward and reverse threads 602, when the first nut 603 moves due to the loosening, the second nut 604 moves in the reverse direction, the second nut 604 serves to tighten the connection between the first nut 603 and the stud 6.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A pressure balanced pressure relief valve characterized by: the valve comprises a valve body, a driving cavity, a circulating pipeline and connecting flanges, wherein the driving cavity is arranged at the bottom of the valve body, the bottom of the driving cavity is movably connected with the circulating pipeline, and the connecting flanges are arranged at the left end and the right end of the circulating pipeline;

2. A pressure balanced pressure relief valve as claimed in claim 1, wherein: the side surface of the connecting flange is provided with a stud through a threaded hole, the stud is provided with a forward thread and a forward thread, the forward thread of the stud is in threaded connection with the connecting flange and a first nut, and the first nut is positioned on the outer side of the connecting flange; the positive and negative screw thread of the stud is connected with a second nut in a threaded manner, and the positive and negative screw thread can be connected with the first nut in a threaded manner.

3. A pressure balanced pressure relief valve as claimed in claim 1, wherein: the top of the water inlet pipeline and the top of the water outlet pipeline are both provided with pressure gauges.

4. A pressure balanced pressure relief valve as claimed in claim 1, wherein: the inner wall of the circulation groove is provided with a rubber plug.