A new multi-valve core flow limiting valve

Abstract

A new multi-valve core flow limiting valve, comprising a valve body, a valve core and a control handle, the valve body is combined by an upper valve shell and a lower valve shell, the side of the lower valve shell facing the upper valve shell is provided with a fluid through slot, the fluid through slot is closed by the upper valve shell above to form a fluid passage, the fluid through slot comprises a straight flow part and a branch flow part, the straight flow part is arranged along the length direction of the lower valve shell, a plurality of branch flow parts are connected on both sides of the straight flow part, the valve core comprises a plurality of valve core blocks, the valve core blocks are movably connected in the corresponding branch flow parts, the valve core blocks are connected with the control handle arranged outside the valve body, the shape of the valve core blocks is set to be able to block the fluid passage when the flow limiting valve is closed, and when the flow limiting valve is opened, the valve core blocks and the side wall of the branch flow part can form a shunt passage, the fluid flowing out of the shunt passage can impact the fluid flowing out of the straight flow part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve manufacturing, in particular to a new type of multi-valve core flow limiting valve. BACKGROUND

[0002] In daily life and production, flow limiting valves are often used to stabilize the pressure and flow of fluid in the pipeline, so that the pressure and instantaneous flow of fluid in the pipeline can be maintained within a stable range, and the fluid at the end of the pipeline can be used conveniently.

[0003] The flow limiting valves on the market at present have a simple structure, and only one valve core is arranged in the valve body to control the flow of fluid, so that the pressure and instantaneous flow of fluid in the pipeline can be controlled only by the opening and closing of the single valve core. Under the scouring of high-pressure fluid, the valve body will be quickly corroded and worn. The single valve core cannot stably control the pressure and instantaneous flow of fluid, and cannot stably control the pressure and instantaneous flow of fluid. Moreover, because the flow limiting valve has only one valve core to bear the pressure of fluid, when the valve core is opened or closed, the valve core must be slowly moved, otherwise the valve core will be damaged by the great impact of fluid. It is basically necessary to rotate the control handle for more than 5s to completely open or close the valve core. If an emergency occurs, it may not be possible to operate in time, which may cause unnecessary personnel casualties or property losses. SUMMARY

[0004] In order to solve the problems in the prior art, the present application provides a new type of multi-valve core flow limiting valve.

[0005] The technical scheme of the present application is as follows:

[0006] The utility model provides a new type of multi-valve core flow limiting valve, including valve body, valve core and control handle, the valve body is combined by upper valve shell and lower valve shell, one side of lower valve shell is provided with fluid through slot towards upper valve shell, after the combination installation of upper valve shell and lower valve shell, the fluid through slot is closed by upper valve shell and forms fluid passage, fluid flows through the flow limiting valve from fluid passage, the fluid through slot includes straight flow part and branch flow part, the straight flow part is arranged along the length direction of lower valve shell, the both sides of straight flow part are provided with a plurality of branch flow parts along the length direction, and the arrangement direction of adjacent two branch flow parts is different, the valve core includes a plurality of valve core blocks, the valve core blocks are movably connected in the corresponding branch flow part, the valve core blocks are connected with the control handle arranged outside the valve body, the valve core blocks can be changed from the passing position to the blocking position under the action of control handle, the passing position is that the valve core block is in the current branch flow part position, one side of which is adjacent to the straight flow part, and the other side forms a shunt passage with the side wall of branch flow part, the liquid from the front part of fluid through slot can flow into the rear part through the straight flow part and shunt passage respectively, and the straight flow part and shunt passage are not parallel to each other, the blocking position is that the front part of valve core block slides to the front branch flow part and blocks the fluid through slot, when the valve core block is in the blocking position, the fluid in the shunt passage can impact the fluid in the straight flow part, slow down the flow rate of fluid in the straight flow part, thereby reducing the pressure and instantaneous flow of fluid after passing through the flow limiting valve, reducing the direct impact of fluid on the valve body and valve core and the caused abrasion, effectively prolonging the overall life of the flow limiting valve.

[0007] Further, because the impact of high-pressure fluid is evenly distributed to each valve core block, the impact on each valve core block is also smaller, and the valve core can directly control the opening or closing of the fluid passage when the flow limiting valve is opened or closed.

[0008] As described above, a new type of multi-valve core flow limiting valve, the valve core block is in the passing position state, the valve core block and the side wall of the branch flow part form a shunt passage and a straight flow passage respectively, so that the high-pressure fluid in the fluid passage can be shunted into the shunt passage and the straight flow passage, and the front end and the rear end of the shunt passage are respectively communicated with the front end and the rear end of the straight flow passage.

[0009] As preferred, the end of the valve core block towards the front branch flow part is an acute angle a, and the angle a is 20-30 degrees, which can make the shunt part shunt the high-pressure fluid in the fluid passage into the shunt passage and the straight flow passage.

[0010] As preferred, the connecting position of the rear end of the shunt passage and the rear end of the corresponding straight flow passage forms a deflection angle b, and the angle b is 100-125 degrees. The fluid discharged from the shunt passage can be injected towards the straight flow passage, thereby playing a flow limiting role on the fluid in the straight flow passage.

[0011] Further, the valve core block is in the blocking position state, and one end of the valve core block can be slidably inserted into the rear part of the front branch part, one side of the valve core block is flush with the side wall of the front branch part, and the other side is flush with the side wall of the corresponding branch part

[0012] A new multi-valve core flow limiting valve as described above, the control handle includes a rotating frame and a linkage rod, the rotating frame is rotatably connected above the valve body, the linkage rod is arranged parallel to the upper valve shell surface, a connecting rod is arranged between the linkage rod and the corresponding valve core block for connection, a movable spring is arranged between the rotating frame and the linkage rod for connection, and rotating the rotating frame in the opposite direction of the water flow direction can drive all valve core blocks to slide in the corresponding branch part towards the front branch part.

[0013] Preferably, the position where the connecting rod passes through the upper valve shell is provided with a sliding hole, the shape of the sliding hole includes an elongated shape, and the sliding hole is arranged parallel to the corresponding branch part flow channel, so that the valve core block in the branch part can slide along the arrangement direction of the sliding hole.

[0014] Further, a rotatingly connected locking claw is arranged on the side of the valve body, and a locking pin corresponding to the locking claw is arranged on the side of the rotating frame, and the locking claw can clamp the locking pin to fix the rotating frame.

[0015] Preferably, the valve core block is made of ceramic.

[0016] Preferably, the valve body is made of stainless steel.

[0017] The beneficial effects of the present application are:

[0018] 1. A new multi-valve core flow limiting valve, a plurality of linkage valve core blocks are arranged in the valve body of the flow limiting valve, and the flow of fluid flowing through the valve body is controlled, so that the impact of fluid on a single valve core block is reduced, and the service life of the entire flow limiting valve can be prolonged.

[0019] 2. A new multi-valve core flow limiting valve, the flow limiting valve divides high-pressure fluid into two streams through the valve core block, and the two streams flow into the shunt channel and the straight-through channel respectively, the fluid in the shunt channel collides with the fluid in the straight-through channel after being guided by the shunt channel, and the kinetic energy originally carried by the fluid is used to reduce the flow rate of the fluid. Compared with the traditional valve which controls the flow rate of fluid by opening and closing the valve core alone, the flow limiting valve is more stable in controlling the flow rate of fluid, and the impact of fluid on the valve core is smaller.

[0020] 3. The application discloses a new type of multi-valve core flow limiting valve, wherein the flow limiting valve is controlled by multiple valve core blocks, so that the impact of fluid on each valve core block is greatly reduced, the flow limiting valve can be directly controlled by a control handle in a linkage mode through linkage of linkage rods, the flow limiting valve can be closed or opened by pulling the handle, the reaction time is shorter, and the flow limiting valve can be closed or opened by an operator more timely when an emergency occurs, so that personnel life and property safety are protected as much as possible.

[0021] 4. The application discloses a new type of multi-valve core flow limiting valve, wherein the valve core blocks of the flow limiting valve are elastically connected with the control handle through movable springs, but when the flow limiting valve is closed and water hammer effect occurs in fluid in a pipeline, the valve core blocks of the flow limiting valve can be displaced by the impact of the water hammer effect, so that the water hammer effect is buffered, direct impact of the water hammer effect on the valve core blocks and the valve body is avoided, damage of the flow limiting valve is avoided, and after the impact of the water hammer effect is relieved, the valve core blocks can return to the original position under the elastic action of the movable springs, so that the fluid channel is closed. BRIEF DESCRIPTION OF DRAWINGS

[0022] The solutions and advantages of the present application will become clear to those skilled in the art from the following detailed description of the preferred embodiments. The accompanying drawings are merely intended to illustrate the preferred embodiments and are not considered as limitations to the present application.

[0023] In the drawings:

[0024] Figure 1 FIG. 1 is a structural schematic view of a new type of multi-valve core flow limiting valve in the present embodiment 1;

[0025] Figure 2 FIG. 2 is a side view of the new type of multi-valve core flow limiting valve in the present embodiment 1;

[0026] Figure 3 FIG. 3 is a structural schematic view of a lower valve shell in the present embodiment 1;

[0027] Figure 4 FIG. 4 is a structural schematic view of an upper valve shell in the present embodiment 1;

[0028] Figure 5 FIG. 5 is an internal structure schematic view of the flow limiting valve in the present embodiment 1 in an open state;

[0029] Figure 6 FIG. 6 is an internal partial structure schematic view of the flow limiting valve in the present embodiment 1 in the open state;

[0030] Figure 7 FIG. 7 is an internal structure schematic view of the flow limiting valve in the present embodiment 1 in a closed state;

[0031] Figure 8Fig. 1 is a schematic view of the internal partial structure of the flow limiting valve in the closed state as described in Embodiment 1;

[0032] The components represented by the reference numerals in the figures are:

[0033] 1. valve body; 11. upper valve shell; 111. sliding hole; 12. lower valve shell; 121. fluid passage; 122. straight flow portion; 123. branch flow portion; 124. shunt passage; 125. straight flow passage; 126. shunt channel portion; 127. guide channel portion; 2. valve core; 21. valve core block; 211. shunt portion; 212. guide portion; 3. control handle; 31. connecting rod; 32. linkage rod; 33. rotating frame; 34. movable spring; 35. locking hook; 36. handle; 37. locking pin. DETAILED DESCRIPTION

[0034] Reference Figures 1-8 A new multi-valve core flow limiting valve, comprising a valve body 1, a valve core 2 and a control handle 3, the valve body 1 is combined by an upper valve shell 11 and a lower valve shell 12, one side of the lower valve shell 12 towards the upper valve shell 11 is provided with a fluid passage, after the upper valve shell 11 and the lower valve shell 12 are combined and installed, the fluid passage is closed by the upper valve shell 11 to form a fluid passage 121, fluid flows through the flow limiting valve from the fluid passage 121, the fluid passage includes a straight flow portion 122 and a branch flow portion 123, the straight flow portion 122 is arranged along the length direction of the lower valve shell 12, a plurality of branch flow portions 123 are arranged along the length direction on both sides of the straight flow portion 122, and the arrangement directions of adjacent two branch flow portions 123 are different, the valve core 2 includes a plurality of valve core blocks 21, the valve core blocks 21 are movably connected in the corresponding branch flow portions 123, and the valve core blocks 21 can be transformed from a passing position to a blocking position under the action of the control handle 3.

[0035] Further, the passing position is that the valve core block 21 is located in the current branch flow portion 123, one side of which is adjacent to the straight flow portion 122, and the other side forms a shunt passage 124 with the side wall of the branch flow portion 123, liquid flowing from the front part of the fluid passage can flow into the rear part through the straight flow portion 122 and the shunt passage 124 respectively, and the straight flow portion 122 and the shunt passage 124 are not parallel to each other;

[0036] Further, the blocking position is that the front part of the valve core block 21 slides forward into the front branch flow portion 123 and blocks the position of the fluid passage.

[0037] Further, the fluid in the shunt passage 124 can impact the fluid in the straight passage 122, slow down the flow rate of the fluid in the straight passage 122, thereby reducing the pressure and instantaneous flow of the fluid after passing through the flow limiting valve, reducing the direct impact of the fluid on the valve body 1 and the valve core 2 and the resulting wear, effectively prolonging the overall life of the flow limiting valve, and because several valve core blocks 21 are involved in stabilizing the pressure and limiting the flow of the fluid, the impact of high-pressure fluid can be evenly distributed to each valve core block 21, thereby making the flow limiting valve more stable in controlling the flow of high-pressure fluid, and because the impact of high-pressure fluid is evenly distributed among the many valve core blocks 21, the impact and wear on each valve core block 21 is less, further prolonging the service life of the valve core 2.

[0038] As a preferred, referring to Figure 1 and Figure 2 , the upper valve shell 11 and the lower valve shell 12 are connected by bolts, which is convenient and safe to disassemble and assemble, and the valve core block 21 will not fly out due to internal pressure, effectively ensuring safety.

[0039] Further, because the impact of high-pressure fluid is evenly distributed to each valve core block 21, the impact on each valve core block 21 is also smaller, and when opening or closing the flow limiting valve, the valve core 2 can be directly controlled to open or close the fluid passage 121, without the need to slowly open or close the valve core 2 as in traditional flow limiting valves, with faster response speed, facilitating control in emergency situations, and helping to reduce personnel casualties and property losses in emergency situations.

[0040] Referring to Figures 5-8 , the valve core block 21 is in a pass-through position, and the valve core block 21 and the side wall of the branch passage 123 form a shunt passage 124 and a straight passage 125, respectively, so that the high-pressure fluid in the fluid passage 121 can be shunted into the shunt passage 124 and the straight passage 125, the front end and the rear end of the shunt passage 124 and the front end and the rear end of the straight passage 125 are in communication, respectively, the valve core block 21 is composed of a shunt part 211 and a flow guide part 212, the shape of the shunt part 211 is an acute triangle, the shape of the flow guide part 212 is a circular arc, one end of the acute angle of the shunt part 211 faces the water inlet of the fluid passage 121 and is located between the two sides of the fluid passage 121, and the other end is combined with the flow guide part 212.

[0041] As a preferred, the valve core block 21 is made of ceramic, which has high hardness and strong wear resistance, effectively prolonging the service life of the valve core block 21, and the valve body 1 is made of stainless steel, which can effectively prevent rust from occurring, ensuring the service life of the valve body 1.

[0042] Further, the valve core block 21 is an acute angle a towards one end of the front branch part 123, the angle a is 20-30 degrees, the angle design can make the branch part 211 can shunt the high pressure fluid in the fluid passage 121 to the shunt passage 124 and the straight passage 125, at the same time, reduce the impact of high pressure fluid on the valve core block 21 as far as possible, further prolong the service life of the valve core block 21.

[0043] Further, the shunt passage 124 is connected with the corresponding straight passage 125 at the rear end of the shunt passage 124, forming a deflection angle b, the deflection angle b is 100-125 degrees. The fluid discharged from the shunt passage 124 can be sprayed towards the straight passage 125, thereby playing a role in limiting the flow of fluid in the straight passage 125.

[0044] As preferred, the shunt passage 124 includes a shunt waterway part 126 and a guide waterway part 127, the shunt part 211 and the branch part 123 are the shunt waterway part 126 of the shunt passage 124, which is linear in shape, the guide part 212 and the branch part 123 are the guide waterway part 127, which is circular arc shape rotating towards the straight passage 125. The high pressure fluid shunted into the shunt passage 124 enters the circular arc guide waterway part 127 after passing through the shunt waterway part 126, and is sprayed into the straight passage 125 under the backflow effect of the guide waterway part 127, and is sprayed into the straight passage 125 under the backflow effect of the guide waterway part 127. The straight passage 125, while converging with the high pressure fluid in the straight passage 125, forms resistance to the fluid in the straight passage 125, thereby slowing down the flow rate of the fluid in the straight passage 125, that is, unlike the traditional flow limiting valve which forcibly reduces the cross-sectional area of the fluid passing through the valve body 1 and the valve core 2, the flow limiting valve uses the kinetic energy carried by the fluid itself to slow down the flow rate of the fluid. The stable pressure limiting flow method of the limiting valve can reduce the damage of high pressure fluid to the valve body 1 and the valve core 2, which is beneficial to improve the service life of the valve body 1 and the valve core 2.

[0045] Referring to Figure 1 and Figure 2 , the control handle 3 includes a rotating frame 33 and a linkage rod 32, the rotating frame 33 is rotatably connected above the valve body 1, the linkage rod 32 is arranged parallel to the surface of the upper valve shell 11, the linkage rod 32 is connected with the corresponding valve core block 21 through the connecting rod 31, the rotating frame 33 is connected with the linkage rod 32 through the movable spring 34, rotating the rotating frame 33 in the opposite direction of the water flow direction, the rotating frame 33 can drive all valve core blocks 21 to slide in the corresponding branch part 123 towards the front branch part 123 through the linkage rod 32, and the linkage rod 32 of the control handle 3 can control the valve core block 21 to slide in the corresponding branch part 123 along the setting direction of the sliding hole 111, realizing the opening and closing of the limiting valve.

[0046] As preferred, the active spring 34 can form an elastic connection between the linkage rod 32 connected with the valve core block 21 and the control handle 3, the conventional valve core 2 is generally hard fixedly connected with the control handle 3, when being opened or closed, the water hammer effect caused by the fluid in the pipeline will directly impact the valve body 1 and the valve core 2 of the conventional valve, which is very easy to cause damage to the valve, and the elastic connection between the flow limiting valve and the control handle 3 can make the valve core block 21 be pushed away a certain distance in the valve body 1 to buffer when the water hammer effect occurs in the pipeline, after the impact force caused by the water hammer effect is buffered, the valve core block 21 returns to the original position under the left and right of the active spring 34, and the fluid passage 121 is closed, thereby reducing the damage of the water hammer effect to the flow limiting valve.

[0047] As preferred, the position where the connecting rod 31 passes through the upper valve shell 11 is provided with a sliding hole 111, the shape of the sliding hole 111 includes an elongated shape, and the sliding hole 111 is arranged parallel to the corresponding branch flow part 123 branch passage 124, so that the valve core block 21 can be inclined and slid along the sliding hole 111 towards the water inlet straight flow part 122, thereby blocking the connection between the branch flow part 123 and the straight flow part 122, and closing the flow limiting valve.

[0048] Further, a rotatingly connected locking claw 35 is arranged on the side of the valve body 1, and as preferred, the locking claw 35 is arranged on the side of the rotating frame 33 close to the water inlet, and the rotating frame 33 is provided with a protruding locking pin 37 on the side where the locking claw 35 is arranged, and rotating the locking claw 35 can clamp the locking pin 37 to fix the position of the rotating frame 33. When it is desired to close the flow limiting valve, the valve core block 21 will generate a reaction force under the impact of the fluid, so after the valve core block 21 blocks the fluid passage 121 by pulling the control handle 3, the locking claw 35 is used to fix the rotating frame 33, so as to avoid the control handle 3 from bouncing back under the impact of the fluid, causing the valve core block 21 to fail to block the fluid passage 121.

[0049] As preferred, the rotating frame 33 is connected with a handle 36 above, and the handle 36 is arranged to facilitate relevant personnel to pull the control handle 3, and the handle 36 and the rotating frame 33 are connected through threads, which is convenient for disassembly and replacement.

Claims

1. A new multi-spool flow-restricted valve characterized by, The valve body (1) is combined by an upper valve shell (11) and a lower valve shell (12), the side of the lower valve shell (12) facing the upper valve shell (11) is provided with a fluid passage, the fluid passage is closed by the upper valve shell (11) to form a fluid passage (121), the fluid passage comprises a straight flow part (122) and branch flow parts (123), the straight flow part (122) is arranged along the length direction of the lower valve shell (12), the two sides of the straight flow part (122) are provided with a plurality of branch flow parts (123) along the length direction, and the arrangement directions of the adjacent two branch flow parts (123) are different, the valve core (2) comprises a plurality of valve core blocks (21), the valve core blocks (21) are movably connected in the corresponding branch flow parts (123), the valve core blocks (21) are connected with the control handle (3) arranged outside the valve body (1), and the valve core blocks (21) can be changed from a passing position to a blocking position under the action of the control handle (3). The passing position is that the valve core block (21) is located in the current branch flow part (123), one side of the valve core block (21) is adjacent to the straight flow part (122), and the other side of the valve core block (21) forms a shunt passage (124) with the side wall of the branch flow part (123), the liquid flowing from the front part of the fluid passage can flow into the rear part through the straight flow part (122) and the shunt passage (124) respectively, and the straight flow part (122) and the shunt passage (124) are not parallel to each other. The blocking position is that the front part of the valve core block (21) slides forward into the front branch flow part (123) and blocks the fluid passage.

2. A new multi-spool flow-restricted valve according to claim 1, characterized in that, When the valve core block (21) is in the passing position, the shunt passage (124) and the straight flow passage (125) are respectively formed between the valve core block (21) and the side wall of the branch flow part (123), so that the high-pressure fluid in the fluid passage (121) can be shunted into the shunt passage (124) and the straight flow passage (125), and the front end and the rear end of the shunt passage (124) are communicated with the front end and the rear end of the straight flow passage (125) respectively.

3. A new multi-spool flow-restricted valve according to claim 2, characterized in that, When the valve core block (21) is in the blocking position, one end of the valve core block (21) facing the front branch flow part (123) can be slidably inserted into the rear part of the front branch flow part (123), one side of the valve core block (21) is flush with the side wall of the front branch flow part (123), and the other side of the valve core block (21) is flush with the side wall of the corresponding branch flow part (123).

4. A new multi-spool flow-restricted valve according to claim 3, characterized in that, The one end of the valve core block (21) facing the front branch flow part (123) is an acute angle a, and the angle a is 20-30 degrees.

5. A new multi-spool flow-restricted valve according to claim 4, characterized in that, The connecting position of the rear end of the shunt passage (124) and the rear end of the corresponding straight flow passage (125) forms a deflection angle b, and the angle b is 100-125 degrees.

6. A new multi-spool flow-restricted valve according to claim 5, characterized in that, The control handle (3) comprises a rotating frame (33) and a linkage rod (32), the rotating frame (33) is rotatably connected above the valve body (1), the linkage rod (32) is arranged parallel to the surface of the upper valve shell (11), a connecting rod (31) is arranged between the linkage rod (32) and the corresponding valve core block (21) for connection, a movable spring (34) is arranged between the rotating frame (33) and the linkage rod (32) for connection, the rotating frame (33) can be rotated in the opposite direction of the water flow direction, and the rotating frame (33) can drive all valve core blocks (21) to slide in the corresponding branch flow part (123) towards the front branch flow part (123) through the linkage rod (32).

7. A new multi-spool flow-restricted valve according to claim 6, characterized in that, The position of the connecting rod (31) penetrating through the upper valve shell (11) is provided with a sliding hole (111), the shape of the sliding hole (111) comprises an elongated shape, and the sliding hole (111) is arranged parallel to the corresponding branch flow channel (124).

8. A new multi-spool flow-restricted valve according to claim 7, characterized in that, A rotatably connected locking claw (35) is arranged on the side of the valve body (1), the side of the rotating frame (33) is provided with a locking pin (37) corresponding to the locking claw (35), the locking claw (35) can clamp the locking pin (37), and the rotating frame (33) is fixed.

9. A new multi-spool flow-restricted valve according to claim 1, characterized in that, The valve core block (21) is made of ceramic.

10. A new multi-spool flow-restricted valve according to claim 1, characterized in that, The valve body (1) is made of stainless steel.

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