Pressure reduction stop valve for pipeline

Abstract

The pressure reduction stop valve comprises a valve body, a valve cover, a valve rod and a valve element, the valve cover is connected to the upper portion of the valve body, the valve rod and the valve cover are in threaded rotation connection, the bottom of the valve rod extends into the valve body, and a water inlet pipeline and a water outlet pipeline are arranged on the two sides of the interior of the valve body. A valve port is formed between the water inlet pipeline and the water outlet pipeline, the bottom of the valve rod extends to the position above the valve port and is connected with a valve element, a main pressure relief passage is arranged at the bottom of the valve element, a plurality of auxiliary pressure relief passages are arranged on the side face of the valve element, and the auxiliary pressure relief passages are communicated with the main pressure relief passage. According to the scheme, the impact pressure of water flow on the valve port during valve opening can be reduced, and the sealing effect of the valve port is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely relates to a pipeline pressure reducing stop valve. BACKGROUND

[0002] Straight-through type plane seal stop valve is mainly applied to industry, agriculture, heating, oil extraction, chemical field, cooperates with manual, pneumatic or electric actuator, plays the function of pipeline on-off, and can guarantee that the front end of regulating valve does not overpressure. Straight-through type plane seal stop valve is provided with valve port between inlet water pipe and outlet water pipe, and valve core is used to close valve port to realize opening or closing of straight-through type plane seal stop valve, if wear and tear appear at valve port, then the most easy cause is that sealing effect is poor, influence straight-through type plane seal stop valve's use effect.

[0003] The utility model discloses a kind of corrosion-resistant stop valves of application No.2019200137816, including stop valve body, first screw interface and second screw interface are respectively welded on the two sides of the stop valve body, valve cover is screw-connected on the top of the stop valve body, valve stem is vertically embedded in the inside of the stop valve body and screw-connected. The corrosion-resistant stop valve is sleeved with rubber connecting sleeve at the position of valve stem and stop valve core connection, and the top of rubber connecting sleeve is sealed and connected with the inside bottom of valve cover by second annular sealing sheet, and the bottom is sealed and connected with the bottom of stop valve core by first annular sealing sheet, to protect the position of valve stem and stop valve core connection.

[0004] The above-mentioned scheme is sealed and connected with the bottom of stop valve core by first annular sealing sheet, to protect the position of valve stem and stop valve core connection, avoid corrosion, improve sealing effect. But it is the same as straight-through type stop valve at present stage, when just opening, water flow pressure of inlet channel is usually larger, its instantaneous release can cause high-pressure water flow to impact valve port, it is easy to make the inside surface of valve port and the peripheral surface of valve core be impacted by high-speed water pressure, high-pressure impact wear is easy to cause after long-time high-frequency impact, leading to sealing effect decline. Utility model content

[0005] To solve the above problems, the utility model provides a kind of pipeline pressure reducing stop valve, including valve body, valve cover, valve stem and valve core, the top of the valve body is connected with valve cover, the valve stem is screw thread rotation connection between valve cover and the bottom of the valve stem extends to the inside of valve body, the inside of the valve body is equipped with inlet water pipe and outlet water pipe on both sides, the valve port is equipped between the inlet water pipe and outlet water pipe, the bottom of the valve stem extends to the top of valve port and the bottom of the valve stem is connected with valve core, the bottom of the valve core is equipped with pressure relief main passage, the side of the valve core is equipped with a plurality of pressure relief auxiliary passages, a plurality of the pressure relief auxiliary passages are communicated with pressure relief main passage.

[0006] Preferably, the valve port has a T-shaped cross section, and the valve core and the lower part of the valve stem also have T-shaped cross sections.

[0007] Preferably, the bottom of the valve stem is provided with a sliding groove, the upper part of the valve core is slidably arranged in the sliding groove, limit ring grooves are formed in the two sides of the valve core, limit blocks are arranged on the inner side walls of the sliding groove, and springs are connected to the top of the valve core.

[0008] Preferably, the inner side walls of the water inlet pipe are provided with first baffles and second baffles, and the first baffles and the second baffles are arranged alternately.

[0009] Preferably, the inner side walls of the water inlet pipe are provided with rubber linings, and the rubber linings are provided with honeycomb holes.

[0010] The utility model discloses the advantages are:

[0011] 1. The utility model discloses a pressure relief main passage and a pressure relief auxiliary passage are arranged on the bottom and the side of the valve core, when the valve core gradually rises and prepares to open the valve port, high-pressure water flow can be shunted through these passages. In this way, when the valve port is completely opened, the impact pressure of the initial water flow has been greatly reduced, thereby reducing the high-speed water pressure impact on the inner side surface of the valve port and the outer peripheral surface of the valve core, and further reducing the wear caused by the high-pressure water flow impact, the sealing effect between the valve port and the valve core is maintained, thereby improving the sealing performance of the stop valve.

[0012] 2. The utility model discloses a water flow impact pressure dispersion scheme, which helps to reduce the vibration and impact of the valve during opening and closing, thereby enhancing the stability and reliability of the valve.

[0013] 3. In the utility model, the valve core is retracted in the sliding groove and is blocked by the inner side wall of the sliding groove, which can ensure that the valve forms a tight seal in the blocked state. The inner side wall of the valve port is not directly subjected to the pressure of the water flow during blocking, reducing the risk of sealing failure caused by water flow impact pressure and corrosion, thereby improving the sealing performance of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an external structure diagram of the utility model.

[0015] Figure 2 It is a sectional structure diagram of the utility model.

[0016] Figure 3 It is a valve three-dimensional structure diagram of the utility model.

[0017] Figure 4 It is a valve core valve port opening state structure diagram of the utility model.

[0018] Figure 5 Figure 1 is a valve core valve port closing state structure diagram of the utility model.

[0019] In the figure: 1 valve body, 2 valve cover, 3 valve stem, 4 valve core, 5 water inlet pipeline, 6 water outlet pipeline, 7 valve port, 8 pressure relief main passage, 9 pressure relief auxiliary passage, 10 sliding groove, 11 limit ring groove, 12 limit block, 13 spring, 14 first baffle, 15 second baffle, 16 rubber lining, 17 honeycomb hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model.

[0021] In the description of the utility model, it should be explained that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "another end" and the like are the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as the limitation on the utility model.

[0022] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. Meanwhile, when an element is called "fixed to" or "provided with" another element, it can be directly on another element or can exist with a middle element at the same time. When an element is called "connected to" another element, it can be directly connected to another element or can exist with a middle element at the same time. When an element is called "fixedly connected to" another element, it can be fixedly connected in a common fixed connection mode such as welding or bolt connection or glue connection. In any case, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances by the ordinary skilled in the art.

[0023] Example 1, as Figures 1-2As shown, a pressure reducing stop valve for pipeline includes a valve body 1, a valve cover 2, a valve stem 3 and a valve core 4. The valve cover 2 is connected to the top of the valve body 1. The valve stem 3 is threadedly connected to the valve cover 2 and extends into the valve body 1. The valve body 1 has water inlet pipeline 5 and water outlet pipeline 6 on both sides. The valve port 7 is arranged between the water inlet pipeline 5 and the water outlet pipeline 6. The bottom of the valve stem 3 extends above the valve port 7 and is connected to the valve core 4. The contact surface of the valve core 4 and the valve port 7 forms a sealing surface. The valve core 4 can be lifted by rotating the valve stem 3. The valve core 4 blocks the valve port 7 to achieve the closing and opening of the stop valve. The top of the valve stem 3 is connected to a hand wheel. The valve stem 3 can be quickly rotated manually or electrically.

[0024] In combination Figures 3-4 The bottom of the valve core 4 is provided with a main pressure relief passage 8. The side of the valve core 4 is provided with a plurality of auxiliary pressure relief passages 9. The auxiliary pressure relief passages 9 are in communication with the main pressure relief passage 8. When the valve core 4 is in the blocking state, the auxiliary pressure relief passages 9 are tightly attached to the inner side wall of the valve port 7, and the auxiliary pressure relief passages 9 are in the closed state. When the valve core 4 gradually rises, the inner side wall of the valve port 7 no longer has a sealing effect on the auxiliary pressure relief passages 9. The auxiliary pressure relief passages 9 will be in communication with the water outlet pipeline 6 before the valve port 7 is fully opened. At this time, the high-pressure water flow in the water inlet pipeline 5 will enter the auxiliary pressure relief passages 9 through the main pressure relief passage 8 at the bottom of the valve core 4 and be branched from the auxiliary pressure relief passages 9. Therefore, when the valve core 4 is completely away from the valve port 7 and the valve port 7 is opened, the initial water flow impact pressure of the water inlet channel 5 will be greatly reduced because the initial impact pressure of the water flow has been dispersed by the auxiliary pressure relief passages 9 and the main pressure relief passage 8. Because the direct impact of high-pressure water flow is reduced, the wear and tear of the valve port 7 and the valve core 4 will be significantly reduced. This not only can maintain better sealing effect, but also can prolong the overall service life of the stop valve. The pressure reduction design makes the stop valve more stable during opening and closing, reducing the vibration and noise caused by the impact of high-pressure water flow. This helps to improve the stability and reliability of the stop valve.

[0025] The cross section of the valve port 7 is T-shaped structure. The cross section of the valve core 4 below the valve stem 3 is also T-shaped structure. When the T-shaped cross section of the valve core 4 cooperates with the valve port 7, the sealing effect can be better achieved due to the increase of the contact area, preventing water leakage. Moreover, the T-shaped cross section provides larger cross-sectional area in the direction of force, thereby enhancing the structural strength of the valve. This helps to resist stress caused by water flow impact, pressure change or temperature change, improving the durability and reliability of the valve.

[0026] In combination Figures 4-5The bottom of the valve rod 3 is provided with a sliding groove 10, the upper portion of the valve core 4 is slidably arranged in the sliding groove 10, and the two sides of the valve core 4 are provided with limiting ring grooves 11, and the inner side wall of the sliding groove 10 is provided with limiting blocks 12, and the limiting blocks 12 and the limiting ring grooves 11 are used to limit the up-down sliding range of the valve core 4.

[0027] The top of the valve core 4 is connected with a spring 13, the top of the spring 13 is connected with the inner side top of the sliding groove 10. The valve core 4 can slide up and down in the sliding groove 10, in the blocking state, the valve core 4 is retracted in the sliding groove 10, the pressure relief auxiliary passage 9 is blocked by the inner side wall of the sliding groove 10, and the inner side wall of the valve port 7 is not subjected to the pressure of the water flow, and when in the open state, the spring 13 is reset to push the valve core 4 away from the sliding groove 10, so that the pressure relief auxiliary passage 9 is gradually opened. Since in the blocking state, the inner side wall of the valve port 7 is not directly subjected to the pressure of the water flow, this helps to reduce the abrasion and corrosion of the inner side wall of the valve port 7. The risk of sealing failure caused by water flow impact is reduced, thereby improving the sealing performance of the valve. Long-term operation, this design can prolong the service life of the inner side wall of the valve port 7, and reduce the maintenance cost of the valve.

[0028] The inner side wall of the water inlet pipe 5 is provided with a first baffle 14 and a second baffle 15, and the first baffle 14 and the second baffle 15 are arranged alternately. The staggered baffles can effectively disperse and buffer the high-speed water flow in the inlet channel. When the water flow enters the pipe, it first encounters the first baffle 14, the flow direction changes, the speed decreases, and the pressure is preliminarily dispersed. Subsequently, the water flow is further dispersed by the second baffle 15, so that the overall water flow pressure in the water inlet pipe 5 is reduced, thereby reducing the instantaneous impact pressure of the water flow after the valve port 7 is opened. The inner side wall of the water inlet pipe is provided with a rubber lining 16, the rubber lining 16 is provided with honeycomb holes 17, the rubber lining 16 itself has a certain elasticity and buffering effect, and can absorb and disperse the impact energy of the water flow on the inner wall of the pipe. When the water flow pressure of the inlet channel is large, the rubber lining 16 can effectively slow down the impact speed of the water flow and reduce the direct impact force on the valve port 7. The design of the honeycomb holes 17 further enhances the ability to disperse the impact force of the water flow. The existence of the honeycomb holes 17 enables the water flow to form multiple small water flows when passing through, which are hindered and dispersed to a certain extent, thereby reducing the direct impact pressure of the water flow on the valve port 7.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure reducing stop valve for a pipe, characterized by: The utility model provides a valve, including valve body (1), valve cover (2), valve rod (3) and valve core (4), the top of valve body (1) is connected with valve cover (2), valve rod (3) is rotatably connected between valve cover (2) and the bottom of valve rod (3) extends to the inside of valve body (1), the inside of valve body (1) is equipped with water inlet pipe (5) and water outlet pipe (6) on both sides, water inlet pipe (5) and water outlet pipe (6) are equipped with valve port (7) between, the bottom of valve rod (3) extends to the top of valve port (7) and the bottom of valve rod (3) is connected with valve core (4), the bottom of valve core (4) is equipped with pressure relief main passage (8), the side of valve core (4) is equipped with a plurality of pressure relief auxiliary passage (9), a plurality of pressure relief auxiliary passage (9) are communicated with pressure relief main passage (8).

2. The pressure reducing stop valve for a pipe according to claim 1, characterized by: The cross section of the valve port (7) is T-shaped structure, the cross section of the valve core (4) and the valve rod (3) below is also T-shaped structure.

3. The pressure reducing stop valve for a pipe according to claim 2, characterized by: The bottom of the valve rod (3) is equipped with a sliding groove (10), the top of the valve core (4) is slidably arranged in the sliding groove (10), the both sides of the valve core (4) are provided with a limiting ring groove (11), the inner side wall of the sliding groove (10) is provided with a limiting block (12), the top of the valve core (4) is connected with a spring (13), and the top of the spring (13) is connected with the inner side top of the sliding groove (10).

4. The pressure reducing stop valve for a pipe according to claim 3, characterized by: The inner side wall of the water inlet pipe (5) is provided with a first baffle (14) and a second baffle (15), and the first baffle (14) and the second baffle (15) are staggered.

5. The pressure reducing stop valve for a pipe according to claim 4, characterized by: The inner side wall of the water inlet pipe is provided with a rubber lining (16), and the rubber lining (16) is provided with a honeycomb hole (17).

Images