Low-water-loss pipe force valve

Abstract

The utility model discloses a low-water-loss pipe force valve, which comprises a valve body, a valve core, a valve core and a valve core, a control cavity is defined by the control assembly, a movable part capable of movably ascending and descending is installed in the control cavity, the control cavity is divided into an upper cavity and a lower cavity which are independent from each other by the movable part, and the lower cavity and the upper cavity are communicated with the water inlet end and the water outlet end of the overflowing channel respectively; the compression area of the movable part facing the upper cavity is smaller than that of the movable part facing the lower cavity; the control rod is movably mounted on the valve body in a lifting manner; the top end of the control rod is connected with the movable part; the elastic piece is installed in the upper cavity and used for driving the movable piece to descend; and when the pressure of the upper cavity is equal to that of the lower cavity, the movable part ascends to the stroke final position. According to the low-water-damage pipe force valve, the control rod can ascend to the highest position, so that the valve body can keep the maximum opening degree, and water damage passing through the valve is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe force valve technical field, especially a low water loss pipe force valve. BACKGROUND

[0002] The pipe force valve applied to the outlet of the water pump usually has a control rod, the top of the control rod has an upper control cavity and a lower control cavity, the volume of the upper control cavity and the lower control cavity changes to drive the control rod to lift, and then the function of slow opening and slow closing of the valve is realized; since the upper control cavity is a rodless cavity and the lower control cavity is a rod cavity, the effective acting area of the upper control cavity is usually greater than the effective acting area of the lower control cavity, which will cause the downward force of the upper control cavity to be greater than the upward force of the lower control cavity when the valve is opened, and at the same time, the gravity of the control rod, the small valve plate and other components is superimposed, so that the control rod cannot be lifted to the highest position, and then the valve opening degree is suppressed, and the water loss through the valve is increased. SUMMARY

[0003] The utility model aims at solving one of the technical problems in the prior art. To this end, the utility model provides a low water loss pipe force valve, which can ensure that the control rod can be lifted to the highest position under the condition that the pressure of the upper control cavity and the lower control cavity is consistent, so that the valve can maintain the maximum opening degree and reduce the water loss through the valve.

[0004] The low water loss pipe force valve according to the first aspect of the utility model comprises:

[0005] A valve body has a flow passage;

[0006] A control assembly is installed on the valve body; the control assembly defines a control cavity, a movable part is installed in the control cavity, and the movable part is movably installed in the control cavity; the movable part separates the control cavity into an upper chamber and a lower chamber, the lower chamber is communicated with the water inlet end of the flow passage, the upper chamber is communicated with the water outlet end of the flow passage, the pressure receiving area of the movable part towards the upper chamber is S1, the pressure receiving area of the movable part towards the lower chamber is S2, and S1 < S2 is satisfied;

[0007] A control rod is movably installed on the valve body; the top end of the control rod extends into the lower chamber to be connected with the movable part;

[0008] An elastic part is installed in the upper chamber; the top end of the elastic part abuts against the inner wall of the upper chamber, and the bottom end of the elastic part abuts against the movable part; the elastic part is used to drive the movable part to descend;

[0009] When the pressure of the upper chamber and the lower chamber is equal, the movable part is lifted to the end position of the stroke.

[0010] The low water loss pipe force valve has at least the following beneficial effects:

[0011] By setting the pressure receiving area of the movable element towards the upper chamber to be smaller than the pressure receiving area of the movable element towards the lower chamber, even if the elastic element arranged in the upper chamber has a pushing force to push the movable element downwards, the movable element can still rise to the stroke end position when the pressures of the upper chamber and the lower chamber are equal, so the control rod connected with the movable element can also rise to the stroke end position, and the position of the valve when fully open is higher, effectively reducing the water loss when passing through the valve.

[0012] According to some embodiments of the present application, the elastic element applies a force F to the movable element, and the gravity of the control rod is G, wherein 0.2G≤F≤5G.

[0013] According to some embodiments of the present application, one side of the movable element towards the lower chamber is connected with a control rod, and one side of the movable element towards the upper chamber is connected with an identification cylinder, and the vertical lifting of the movable element can drive the control rod and the identification cylinder to lift synchronously.

[0014] The diameter of the identification cylinder is greater than the diameter of the control rod, so that S1<S2.

[0015] According to some embodiments of the present application, the diameter of the identification cylinder is D1, and the diameter of the control rod is D2, wherein 1.1D2≤D1≤3D2.

[0016] According to some embodiments of the present application, the bottom end of the identification cylinder is connected with the movable element, the top end of the identification cylinder extends out of the upper chamber, the vertical lifting of the movable element can drive the identification cylinder to lift, and the elastic element is sleeved on the outer periphery of the identification cylinder.

[0017] According to some embodiments of the present application, the identification cylinder comprises an outer shell and an inner shell, the outer shell is sleeved on the outer periphery of the inner shell, the outer periphery wall of the inner shell is provided with a scale, and the outer shell is made of transparent material.

[0018] According to some embodiments of the present application, the top of the identification cylinder is sealingly arranged.

[0019] According to some embodiments of the present application, a bump block is installed at the top end of the identification cylinder.

[0020] According to some embodiments of the present application, the low water loss pipe force valve further comprises:

[0021] A valve shaft is installed in the valve body and partially penetrates the flow passage;

[0022] A big valve plate is installed in the flow passage and connected with the valve shaft, the big valve plate is eccentrically arranged with the valve shaft, the big valve plate can rotate around the valve shaft to close the flow passage, the big valve plate is provided with a through hole penetrating the big valve plate;

[0023] The bottom of the control rod is hinged with the valve shaft through a connecting rod mechanism, the vertical lifting of the movable part can drive the lifting of the control rod;

[0024] A small valve plate is installed in the connecting rod mechanism, the small valve plate is used for sealing the through hole of the big valve plate;

[0025] According to some embodiments of the utility model, the connecting rod mechanism comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod in the length direction is hinged with the bottom end of the control rod, the second end of the first connecting rod in the length direction is hinged with the first end of the second connecting rod in the length direction, and the second end of the second connecting rod in the length direction is hinged with the valve shaft;

[0026] The small valve plate is installed at the connection of the first connecting rod and the second connecting rod.

[0027] The additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0028] The utility model will be further explained in connection with the drawings and embodiments, wherein:

[0029] Figure 1 It is the position schematic view of the pipe force valve of the utility model embodiment when being in the valve closing state;

[0030] Figure 2 It is Figure 1 It is the enlarged view of A in the middle;

[0031] Figure 3 It is the position schematic view of the pipe force valve of the utility model embodiment when being in the valve opening process;

[0032] Figure 4 It is the position schematic view of the pipe force valve of the utility model embodiment when being in the full valve opening state;

[0033] Figure 5 It is the position schematic view of the pipe force valve of the utility model embodiment when being in the valve closing process;

[0034] Figure 6 It is the structure schematic view of the piston type pipe force valve of another utility model embodiment.

[0035] REFERENCE SIGNS

[0036] Valve body 100, flow passage 110, water inlet end 111, water outlet end 112, valve shaft 120;

[0037] Control assembly 200, upper chamber 210, elastic member 211, identification cylinder 212, lower chamber 220, control rod 221, movable member 230;

[0038] Large valve plate 300, through hole 310;

[0039] Connecting rod mechanism 400, first connecting rod 410, second connecting rod 420, small valve plate 430. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0042] In the description of the present application, the plural refers to more than two. If there is a description of the first, the second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0043] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0044] Referring to Figures 1 to 6A low-water-loss pipe force valve according to an embodiment of the present invention includes a valve body 100, which has a flow passage 110. A valve seat is obliquely arranged on the inner side wall of the flow passage 110, dividing the flow passage 110 into an inlet end 111 and an outlet end 112. A valve shaft 120 is inserted through the outlet end 112 of the valve body 100, and part of the valve shaft 120 extends into the flow passage 110. A large valve plate 300 is installed in the flow passage 110. The large valve plate 300 can be sealed to the valve seat to close the flow passage 110 and cut off the connection between the inlet end 111 and the outlet end 112. The large valve plate 300 is connected to the valve shaft 120, and the large valve plate 300 and the valve shaft 120 are eccentrically arranged. Specifically, the central axis of the valve shaft 120 is parallel to the central axis of the large valve plate 300, but the central axes of the two do not coincide. The large valve plate 300 can rotate around the valve shaft 120 to close or open the flow passage 110.

[0045] Reference Figure 1 , Figure 2 As shown, a control assembly 200 is installed on the top of the valve body 100 at the outlet end 112. The control assembly 200 defines a control chamber, and a movable part 230 is installed inside the control chamber. The movable part 230 is movably and vertically installed inside the control chamber; specifically, Figure 1 The diagram shows a diaphragm-type control assembly 200, in which the movable element 230 is a diaphragm; Figure 6 The diagram shows a piston-type control assembly 200, where the movable element 230 is a piston plate. The movable element 230 divides the control chamber into an independent upper chamber 210 and a lower chamber 220. The lower chamber 220 is connected to the inlet end 111 of the flow channel 110, and the upper chamber 210 is connected to the outlet end 112 of the flow channel 110. (Refer to...) Figure 1 , Figure 6 As shown, the upper chamber 210 is located above the movable part 230, and the lower chamber 220 is located below the movable part 230. Both the upper chamber 210 and the lower chamber 220 are closed chambers. The upper chamber 210 is connected to the outlet end 112 of the flow channel 110 through a bypass pipe, and the lower chamber 220 is connected to the inlet end 111 of the flow channel 110 through a bypass pipe.

[0046] Further, the pressure receiving area of the movable element 230 towards the upper chamber 210 is S1, and the pressure receiving area of the movable element 230 towards the lower chamber 220 is S2, satisfying S1 < S2; specifically, in the present embodiment, the pressure receiving area of the movable element 230 towards the upper chamber 210 refers to the area of the upper surface of the movable element 230 in contact with the medium in the upper chamber 210 when the upper chamber 210 is filled with medium, and the pressure receiving area of the movable element 230 towards the lower chamber 220 refers to the area of the lower surface of the movable element 230 in contact with the medium in the lower chamber 220 when the lower chamber 220 is filled with medium; since S1 < S2, the area of the upper surface of the movable element 230 in contact with the medium in the upper chamber 210 will be smaller than the area of the lower surface in contact with the medium in the lower chamber 220, so when the medium pressure in the upper chamber 210 and the lower chamber 220 is balanced, the movable element 230 will rise due to the larger pressure receiving area of the lower surface, i.e. when the pressure in the upper chamber 210 and the lower chamber 220 is equal, the movable element 230 will continue to rise to the end position of the stroke. The low water loss pipe valve of the present embodiment sets the pressure receiving area of the movable element 230 towards the upper chamber 210 to be smaller than the pressure receiving area of the movable element 230 towards the lower chamber 220, so that even if the elastic element 211 arranged in the upper chamber 210 has a pushing force to push the movable element 230 downwards, it can still ensure that the movable element 230 can rise to the end position of the stroke when the pressure in the upper chamber 210 and the lower chamber 220 is equal, so the control rod 221 connected to the movable element 230 can also rise to the end position of the stroke, thereby making the position of the valve when fully open higher, effectively reducing the water loss when passing through the valve.

[0047] In the embodiment of the utility model, the lower surface of the movable part 230 is connected with the control rod 221, the upper surface of the movable part 230 is connected with the identification cylinder 212, the diameter of the identification cylinder 212 is greater than the diameter of the control rod 221, therefore the pressure receiving area S1 of the movable part 230 towards the upper chamber 210 is less than the pressure receiving area S2 of the movable part 230 towards the lower chamber 220. The identification cylinder 212 extends upwards out of the upper chamber 210, the control rod 221 extends downwards out of the lower chamber 220, the movable part 230 vertically lifting will drive the identification cylinder 212 and the control rod 221 to synchronously lift. Since the identification cylinder 212 and the control rod 221 both have their own weight, therefore when the medium pressure in the upper chamber 210 and the lower chamber 220 is balanced, the force of the pressure difference of the upper chamber 210 and the lower chamber 220 pushing the movable part 230 to rise also needs to at least overcome the gravity of the identification cylinder 212, the control rod 221 and the movable part 230, in order to ensure that the pressure difference of the upper chamber 210 and the lower chamber 220 can push the movable part 230 to rise, and also not to make the pressure difference of the upper chamber 210 and the lower chamber 220 too large to cause the movable part 230 to rapidly rise, preferably the diameter of the identification cylinder 212 is 1.1 to 2 times the diameter of the control rod 221, that is, the diameter of the identification cylinder 212 is D1, the diameter of the control rod 221 is D2, wherein 1.1D2≤D1≤3D2.

[0048] In the embodiment of the utility model, the identification cylinder 212 comprises an outer shell and an inner shell, the outer shell is sleeved on the outer periphery of the inner shell; the outer peripheral wall of the inner shell is provided with a scale, and the outer shell is made of transparent material. Specifically, as known from the above, the top of the identification cylinder 212 extends out of the upper chamber 210, in order to facilitate the observation of the specific opening degree of the low water loss pipe force valve of the embodiment, the scale can be arranged on the identification cylinder 212 to facilitate the observation of the specific opening degree of the pipe force valve. Since the identification cylinder 212 is to extend upwards out of the upper chamber 210, and at the same time the sealing effect of the upper chamber 210 needs to be ensured, therefore the outer peripheral wall of the identification cylinder 212 needs to be provided with a smooth surface, therefore the identification cylinder 212 is provided with two layers of the outer shell and the inner shell, and the outer shell is made of transparent material, which can effectively observe the opening degree of the pipe force valve while ensuring the sealing of the upper chamber 210, and also avoids the scale being scratched.

[0049] It is conceivable that an opening degree scale can also be arranged outside the control chamber, and the valve opening degree is directly displayed through the lifting of the identification cylinder 212.

[0050] In the embodiment of the utility model, the top of the identification cylinder 212 is sealed, and a knock block is installed at the top end of the identification cylinder 212. Specifically, in order to protect the clarity of the scale of the inner shell in the identification cylinder 212, and also to avoid dust, impurities, rainwater and the like from entering the identification cylinder 212 to cause pollution to the identification cylinder 212, the top of the identification cylinder 212 is preferably sealed. The knock block is preferably made of metal material, and has high hardness, so that the knock block has anti-knock ability. The knock block can be detachably connected to the top of the identification cylinder 212 in a threaded or buckling manner, so that the knock block can be replaced individually, thereby reducing the maintenance cost. The knock block is used for facilitating knocking. In the case that the control rod 221 is stuck and cannot be lowered in the long-term use of the pipe force valve, the control rod 221 can be lowered by knocking the knock block.

[0051] It is conceivable that the knock block can also be knocked periodically to reduce the probability that the control rod 221 is stuck by impurities.

[0052] When the low water loss pipe force valve of the embodiment is operated to close the valve, in order to prevent the friction between the identification cylinder 212 and the control assembly 200 from affecting the lowering of the control rod 221, an elastic member 211 is further arranged in the upper chamber 210. As shown in Figure 2 , the elastic member 211 is preferably a spring, the elastic member 211 is sleeved on the outer periphery of the identification cylinder 212, the top end of the elastic member 211 abuts against the inner wall of the upper chamber 210, and the bottom end of the elastic member 211 abuts against the movable member 230. The elastic member 211 is used to drive the movable member 230 to lower. In order to ensure that the force applied by the elastic member 211 to the movable member 230 can overcome the frictional force borne by the identification cylinder 212 and the elastic member 211, preferably, the force applied by the elastic member 211 to the movable member 230 is F, and the gravity of the control rod 221 is G, wherein 0.2G≤F≤5G.

[0053] In the embodiment of the utility model, the bottom of the control rod 221 is hinged to the valve shaft 120 through a connecting rod mechanism 400. The large valve plate 300 is provided with a through hole 310 penetrating through the large valve plate 300, and the connecting rod mechanism 400 is provided with a small valve plate 430, and the small valve plate 430 is used to seal the through hole 310. The connecting rod mechanism 400 comprises a first connecting rod 410 and a second connecting rod 420, the first end of the first connecting rod 410 in the length direction is hinged to the bottom end of the control rod 221, the second end of the first connecting rod 410 in the length direction is hinged to the first end of the second connecting rod 420 in the length direction, and the second end of the second connecting rod 420 in the length direction is hinged to the valve shaft 120. The small valve plate 430 is installed at the connection between the first connecting rod 410 and the second connecting rod 420.

[0054] The steps of opening and closing the valve of the low water loss pipe force valve of the embodiment are as follows:

[0055] The pipe force valve is in the full closed state as shown in FIG. 1, at this time the movable element 230 is at the lower end position of the stroke, the small valve plate 430 seals the through hole 310, and the large valve plate 300 is in sealing connection with the valve seat in the flow passage 110, so as to close the flow passage 110 and cut off the communication between the water inlet end 111 and the water outlet end 112. Figure 1

[0056] Figure 4 The pipe force valve is in the full open state as shown in FIG. 2, during the switching process of the pipe force valve from the full closed state to the full open state, the pipe force valve is in the state shown in FIG. 3; for example, at this time the medium flows from right to left and pushes the large valve plate 300 to rotate around the valve shaft 120; at the same time, the medium enters the lower chamber 220 and pushes the movable element 230 to rise, and then drives the control rod 221 to rise, and the control rod 221 rising synchronously drives the connecting rod mechanism 400 and the small valve plate 430 to act, so that the large valve plate 300 and the small valve plate 430 rise synchronously, and since the movable element 230 can continuously rise to the upper end position of the stroke as shown in FIG. 4, the small valve plate 430 does not affect the large valve plate 300 to open to the position shown in FIG. 5. Figure 3 Figure 3 Figure 4 Figure 4

[0057] During the switching process of the pipe force valve from the full open state to the full closed state, that is, the switching process of the pipe force valve from the state shown in FIG. 2 to the state shown in FIG. 1, the positions of the structural members inside the pipe force valve refer to FIG. 3; after the right end of the pipe force valve loses the medium pressure, the large valve plate 300 will quickly close under the action of gravity, at this time there will be part of the backflow medium in the flow passage 110 impacting the left side of the large valve plate 300, and at the same time the medium of the water outlet end 112 will enter the upper chamber 210 in the reverse direction and push the movable element 230 to descend, but since the descending speed of the movable element 230 will be much smaller than the closing speed of the large valve plate 300, the closing speed of the small valve plate 430 will be obviously lagged, resulting in the state shown in FIG. 4; when the large valve plate 300 is in the closed state and the small valve plate 430 has not yet closed the through hole 310, part of the backflow pressure medium can be discharged to the water inlet end 111 through the through hole 310, so as to reduce the destructive impact of the backflow pressure medium on the large valve plate 300 and the outlet pipeline, and protect the large valve plate 300 and the pipe network system. The backflow pressure medium simultaneously enters the upper chamber 210 through the bypass pipe and pushes the medium in the lower chamber 220 to flow back to the water inlet end 111 from the bypass pipe, so that the movable element 230 moves downward under the joint action of the medium thrust and the elastic element 211, so that the control rod 221 and the small valve plate 430 connected therewith descend to the position of sealing contact with the through hole 310 on the large valve plate 300, and the valve is completely closed, and the valve returns to the position shown in FIG. 1. Figure 4 Figure 1 Figure 5 Figure 5 Figure 1 ​​​​​​​​​​

[0058] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification.

[0059] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.

Claims

1. A low water-loss force valve characterized by, The utility model provides a low water loss pipe force valve, including: The valve body has the flow channel; The control assembly is installed in the valve body; The control assembly defines the control chamber, and the movable element is installed in the control chamber; the movable element is installed in the control chamber in the up-and-down mode; the movable element separates the control chamber into the upper chamber and the lower chamber, and the lower chamber is communicated with the water inlet end of the flow channel, and the upper chamber is communicated with the water outlet end of the flow channel; the pressure receiving area of the movable element towards the upper chamber is S1, and the pressure receiving area of the movable element towards the lower chamber is S2, and S1 < S2 is satisfied; The control rod is installed in the valve body in the up-and-down mode; the top end of the control rod extends into the lower chamber to be connected with the movable element; The elastic element is installed in the upper chamber; the top end of the elastic element is abutted against the inner wall of the upper chamber, and the bottom end of the elastic element is abutted against the movable element; the elastic element is used to drive the movable element to descend; When the pressure of the upper chamber and the lower chamber is equal, the movable element rises to the end position of stroke.

2. The low water cut force valve of claim 1, wherein: The force applied by the elastic element to the movable element is F, and the gravity of the control rod is G, wherein 0.2G <= F <= 5G.

3. The low water cut force valve of claim 1, wherein: The side of the movable element towards the lower chamber is connected with the control rod, and the side of the movable element towards the upper chamber is connected with the identification cylinder; the movable element can drive the control rod and the identification cylinder to rise and fall in the up-and-down mode; The diameter of the identification cylinder is greater than the diameter of the control rod, so that S1 < S2 is satisfied.

4. The low water cut force valve of claim 3, wherein: The diameter of the identification cylinder is D1, and the diameter of the control rod is D2, wherein 1.1D2 <= D1 <= 3D2.

5. The low water cut force valve of claim 3, wherein: The bottom end of the identification cylinder is connected with the movable element, the top end of the identification cylinder extends out of the upper chamber, the movable element can drive the identification cylinder to rise and fall in the up-and-down mode, and the elastic element is sleeved on the outer periphery of the identification cylinder.

6. The low water cut force valve of claim 3, wherein: The identification cylinder comprises an outer shell and an inner shell, the outer shell is sleeved on the outer periphery of the inner shell; the outer periphery wall of the inner shell is provided with a scale, and the outer shell is made of transparent material.

7. The low water cut force valve of claim 3, wherein: The top of the identification cylinder is sealed.

8. The low water cut force valve of claim 3, wherein: The top end of the identification cylinder is provided with a bump block.

9. The low water cut force valve of claim 1, wherein: The low water loss pipe force valve further comprises: The valve shaft is installed in the valve body and partially penetrates the flow channel; The large valve plate is installed in the flow channel and connected with the valve shaft, and the large valve plate is eccentrically arranged with the valve shaft; the large valve plate can rotate around the valve shaft to close the flow channel; the large valve plate is provided with a through hole penetrating the large valve plate; The bottom of the control rod is hinged with the valve shaft through the connecting rod mechanism; the movable element can drive the control rod to rise and fall in the up-and-down mode; The small valve plate is installed in the connecting rod mechanism, and the small valve plate is used to seal the through hole.

10. The low water cut force valve of claim 9, wherein: The connecting rod mechanism comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod in the length direction is hinged with the bottom end of the control rod, the second end of the first connecting rod in the length direction is hinged with the first end of the second connecting rod in the length direction, and the second end of the second connecting rod in the length direction is hinged with the valve shaft; The small valve plate is installed at the connection of the first connecting rod and the second connecting rod.

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