Shaftless quick-closing check valve

Abstract

The utility model relates to a shaft-free quick-closing check valve which comprises a valve body, a valve seat, a valve clack, a bracket, a reed, a spring and a pressing ring. A flow guide body structure is arranged in the valve body to form a streamline flow channel; the valve seat is installed at the inlet end of the valve body and fixed through the pressing ring. The valve clack is mounted in the valve body, one end faces the valve seat, and the other end is matched with the bracket; one end of the reed is fixed in the valve body, and the other end is fixedly connected with the bracket; a spring chamber is arranged in the valve body, the spring is located in the spring chamber, one end is contacted with the bottom of the spring chamber, and the other end is contacted with the bracket. Compared with the prior art, the check valve completely overcomes the pump stopping water hammer phenomenon or the non-check phenomenon caused by the problems of long valve closing time or axial jamming and the like of a traditional check valve closed in a one-section mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve structure field especially is related to a shaftless speed closing check valve. BACKGROUND

[0002] The check valve of water supply system is installed at the outlet end of water pump, prevents the backflow of water when stopping the pump and damages the water pump motor, and is a standard requirement.

[0003] These check valves currently have various problems in use, such as the two-section oil pressure slow closing check valve, which often has problems such as oil leakage, oil cylinder non-reset, oil cylinder shaft jamming, and large water loss (with a heavy hammer), and has a relatively high failure rate; the axial flow type flat plate check valve often has problems such as valve clack shaft jamming, slow valve closing causing water hammer, or non-checking causing water pump reversal; the one-section closing swing check valve has problems such as long closing time, relatively large backflow speed, and serious water hammer phenomenon. SUMMARY

[0004] The utility model discloses a shaftless speed closing check valve, which can overcome the defects of the traditional one-section closing check valve, such as pump stopping water hammer phenomenon caused by long valve closing time or axial jamming, or non-checking phenomenon.

[0005] The utility model discloses a shaftless speed closing check valve, which can overcome the defects of the traditional one-section closing check valve, such as pump stopping water hammer phenomenon caused by long valve closing time or axial jamming, or non-checking phenomenon.

[0006] A shaftless speed closing check valve, comprising a valve body, a valve seat, a valve clack, a bracket, a reed, a spring and a compression ring.

[0007] The valve body is provided with a flow guide structure, forming a streamlined flow channel.

[0008] The valve seat is installed at the inlet end of the valve body and is fixed by the compression ring.

[0009] The valve clack is installed in the valve body, one end of which faces the valve seat, and the other end of which cooperates with the bracket.

[0010] One end of the reed is fixed in the valve body, and the other end is fixedly connected to the bracket.

[0011] The valve body is provided with a spring chamber, and the spring is located in the spring chamber, one end of which contacts the bottom of the spring chamber, and the other end of which contacts the bracket.

[0012] Further, the valve body is of an axial flow streamlined structure, and the flow guide structure in the valve body is integrally cast with the body of the valve body. Further, the valve body is of an axial flow streamlined structure, and the flow guide structure in the valve body is integrally cast with the body of the valve body.

[0013] Further, one side of the valve disc is spherical surface, and the other side is cross rib structure, the tail of the cross rib structure is matched with the center hole of the bracket.

[0014] Further, the sealing surface of the valve seat is conical surface, and a circle of sealing rubber is vulcanized in the middle of the sealing surface of the valve seat.

[0015] Further, one side of the bracket is in contact with the valve disc, and the other side is connected with the spring leaf.

[0016] Further, the number of the spring leaf is multiple, and the multiple spring leaves are uniformly distributed on the bracket.

[0017] Further, one end of the spring leaf is fixed in the valve body through a screw, and the other end is fixed on the bracket through a rivet.

[0018] Further, the pressing ring is installed at the inlet end of the valve body through threads.

[0019] Further, when the inlet end of the valve body is supplied with water flow, the valve disc is pushed by the water flow to push the bracket and the spring leaf, and the spring is compressed to open;

[0020] When the inlet end of the valve body is not supplied with water flow, the valve disc is closed by the pushing force of the spring.

[0021] Further, the shaft-speed-closed check valve is installed at the outlet end of the water pump.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] (1) the shaft-speed-closed check valve provided by the utility model is valve disc without shaft structure, the valve disc is driven by water flow to compress the spring leaf and the spring, opening is realized, when the valve disc is not driven by water flow, closing is realized by the pushing force of the spring leaf and the spring, the scheme can prevent scale from being generated due to long-term use of the valve, and can prevent the problems that the valve disc shaft is blocked and the valve disc cannot be smoothly operated or even cannot be closed.

[0024] (2) the sealing surface of the valve seat is metal spherical surface plus vulcanized rubber in the valve seat, and the spherical surface can better realize sealing effect during sealing.

[0025] (3) the shaft-speed-closed check valve can be installed at the outlet end of the water pump, plays the role of speed-closed check, has low flow resistance in the opening state, and will not appear the phenomenon that the valve disc shaft is blocked when being closed, can more effectively prevent water hammer, and protects the water pump. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a sectional structure schematic view of the shaft-speed-closed check valve provided in the utility model embodiment;

[0027] Figure 2 This is a schematic diagram of the disassembled state structure of a non-shaft-speed closed check valve provided in an embodiment of this utility model;

[0028] In the diagram, 1 is the valve body, 2 is the valve seat, 3 is the valve disc, 4 is the bracket, 5 is the reed, 6 is the spring, and 7 is the pressure ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Example 1

[0034] like Figure 1 and Figure 2 As shown, this embodiment provides a non-shaft-speed closed check valve, including a valve body 1, a valve seat 2, a valve disc 3, a bracket 4, a spring 5, a spring 6, and a pressure ring 7;

[0035] The valve body 1 is equipped with a fluid guiding structure to form a streamlined flow channel;

[0036] Valve seat 2 is installed at the inlet end of valve body 1 and is fixed by pressure ring 7;

[0037] The valve flap 3 is installed in the valve body 1, one end towards the valve seat 2, the other end cooperating with the bracket 4;

[0038] One end of the spring leaf 5 is fixed inside the valve body 1, the other end is fixedly connected to the bracket 4;

[0039] The valve body 1 is provided with a spring chamber, and the spring 6 is located in the spring chamber, one end in contact with the bottom of the spring chamber, the other end in contact with the bracket 4.

[0040] Preferably, the valve body 1 is an axial flow streamline structure, the flow guide structure in the valve body 1 is integrally cast with the body of the valve body 1, and forms a streamline flow channel.

[0041] Preferably, the side of the valve flap 3 towards the valve seat 2 is spherical, and the other side is a cross rib structure, that is, the valve flap 2 is a spherical cross rib cast, installed on the upper part of the bracket 4, and the tail of the cross rib structure of the valve flap 3 cooperates with the center hole of the bracket 4. The spherical surface can better realize the sealing effect when sealed

[0042] Preferably, the sealing surface of the valve seat 2 is a conical surface, and a circle of sealing rubber is vulcanized in the middle of the sealing surface of the valve seat 2. The valve seat 4 is located at the inlet end of the valve body 1 and is tightly fixed by the pressing ring 7.

[0043] One side of the bracket 4 is in contact with the valve flap 3, and the other side is connected to the spring leaf 5.

[0044] Preferably, the number of spring leaves 5 is multiple, and the multiple spring leaves 5 are evenly distributed on the bracket 4.

[0045] In this embodiment, the back of the bracket 4 is fixed by 2-3 spring leaves 5 with rivets. The 2-3 spring leaves 5 are evenly distributed.

[0046] Optionally, one end of the spring leaf 5 is fixed in the valve body 1 by a screw, and the other end is fixed on the bracket 4 by a rivet.

[0047] In this embodiment, one end of the spring leaf 5 is fastened to the inner rib of the valve body 1 by a screw, and the other end is fixed to the bottom of the bracket 4 by a rivet.

[0048] The spring 6 is located in the spring chamber at the center of the valve body 1 and tightly presses the back of the bracket 4.

[0049] The pressing ring 7 is installed at the inlet end of the valve body 1 by threads and tightly presses the valve seat 3 to fix it.

[0050] Working principle:

[0051] When the water pump is turned on, the pressure before the check valve rises, reaches the minimum opening pressure of the check valve, the valve flap 3 opens, pushes the bracket 4 and the spring leaf 5, and compresses the spring 6; when the water flow rate reaches the full opening flow rate, the valve flap 3 tightly abuts against the flow guide in the valve body 1, at this time the check valve is fully opened.

[0052] When the water pump is normally closed or power failure due to an accident, the water flow rate in the pipe decreases to near zero, the spring 6 due to the action of the spring force, push the bracket 4 and the valve 3, so that the valve 3 is quickly closed and pressed on the valve seat 2, at this time the check valve is completely closed.

[0053] The shaft speed closing check valve can be installed at the outlet end of the water pump, plays the role of speed closing non-return, and the flow resistance is low in the opening state, and the valve shaft is not blocked in the closing state, can more effectively prevent water hammer, and protects the water pump.

[0054] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A shaft-speed independent closed check valve characterized by, It comprises a valve body (1), a valve seat (2), a valve flap (3), a bracket (4), a spring leaf (5), a spring (6) and a pressing ring (7); The valve body (1) is provided with a flow guide structure, forming a streamlined flow channel; The valve seat (2) is installed at the inlet end of the valve body (1) and is fixed by the pressing ring (7); The valve flap (3) is installed in the valve body (1), one end facing the valve seat (2) and the other end cooperating with the bracket (4); One end of the spring leaf (5) is fixed inside the valve body (1), and the other end is fixedly connected with the bracket (4); The valve body (1) is provided with a spring chamber, and the spring (6) is located in the spring chamber, one end of the spring (6) contacting the bottom of the spring chamber and the other end contacting the bracket (4).

2. A shaft-speed-independent check valve according to claim 1, characterized in that The valve body (1) is an axial flow streamlined structure, and the flow guide structure in the valve body (1) is integrally cast with the body of the valve body (1).

3. A shaft-speed-independent check valve according to claim 1, characterized in that The side of the valve flap (3) facing the valve seat (2) is spherical, and the other side is a cross rib structure, the tail of the cross rib structure cooperating with the center hole of the bracket (4).

4. A shaft-speed-independent check valve according to claim 1, wherein The sealing surface of the valve seat (2) is a conical surface, and a circle of sealing rubber is vulcanized in the middle of the sealing surface of the valve seat (2).

5. A shaft-speed-independent check valve according to claim 1, wherein One side of the bracket (4) contacts the valve flap (3), and the other side is connected with the spring leaf (5).

6. A shaft-speed-independent check valve according to claim 1, wherein The number of spring leaves (5) is multiple, and the multiple spring leaves (5) are evenly distributed on the bracket (4).

7. A shaft-speed-independent check valve according to claim 1, wherein One end of the spring leaf (5) is fixed in the valve body (1) by a screw, and the other end is fixed on the bracket (4) by a rivet.

8. A shaft-speed-independent check valve according to claim 1, wherein The pressing ring (7) is installed at the inlet end of the valve body (1) by threads.

9. The shaftless speed-closing check valve of claim 1, wherein, When the inlet end of the valve body (1) is supplied with water flow, the valve flap (3) is pushed by the water flow to push the bracket (4) and the spring leaf (5), and the spring (6) is compressed to open; When the inlet end of the valve body (1) has no water flow, the valve flap (3) is closed by the pushing force of the spring (6).

10. A shaft-speed-independent check valve according to claim 1, wherein The shaftless speed-closing check valve is installed at the outlet end of the water pump.

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