Anti-freezing ball valve

Abstract

The utility model provides an anti-freezing ball valve which comprises a valve body, the valve body is provided with a valve cavity, an inlet and an outlet are formed in the two sides of the valve cavity respectively, the inlet and the outlet are both provided with connecting flanges, and a ball core controlled to rotate through a valve rod is arranged in the valve cavity. The ball core is provided with a through hole which faces the inlet and the outlet or is staggered with the inlet and the outlet during rotation, the inlet is provided with a first valve seat which is pushed by one connecting flange and abuts against the ball core, and the outlet is provided with a second valve seat which is pushed by the other connecting flange and abuts against the ball core. The first valve seat and the second valve seat are annular, and annular extrusion faces are arranged at the positions, making contact with the ball core, of the first valve seat and the second valve seat. And the inlet is connected with the valve cavity at the outer wall of the ball core through a flow guide channel. The utility model has the advantages of simple structure and capability of avoiding frost crack caused by low temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve field, concretely relates to a kind of anti-freezing ball valve. BACKGROUND

[0002] Ball valve is the most commonly used valve, by rotating ball-shaped valve core to be realized opening and closing medium passage function, mainly responsible for cutting off, distribution and change medium flow direction on pipeline.

[0003] Chinese patent CN202120935305.7 discloses an anti-freezing ball valve, which belongs to the technical field of valve manufacturing. It solves the problem that the anti-freezing effect of the existing anti-freezing ball valve is still not ideal. The anti-freezing ball valve includes a valve body, a valve stem, a valve ball, a valve seat, and a handle. The valve ball has a through liquid hole. The valve body and the valve seat are threadedly connected. The valve ball is located in the valve body, and there is a cavity between the bottom of the valve ball and the valve body. A sealing seat one is provided between the valve ball and the valve body. A sealing seat two is provided between the valve ball and the valve seat. The inner end of the valve stem is connected to the valve ball. The handle has an axially extended extension. The extension is fixedly connected to the outer end of the valve stem that protrudes out of the valve body. The bottom of the valve ball has a plurality of liquid holes. Each liquid hole connects the through liquid hole and the cavity.

[0004] In the open state, the liquid holes, the through liquid hole, and the cavity of the ball valve are connected to each other. The anti-freezing relies on the connection between the through liquid hole and the entire pipeline. At this time, the anti-freezing effect can be achieved. However, when the ball valve is in the closed state, the connection between the through liquid hole and the entire pipeline is blocked by the sealing seat 1 and the sealing seat 2, forming a sealed environment for the liquid holes, the through liquid hole, and the cavity. Therefore, in the closed state, freezing and cracking may still occur at low temperatures. UTILITY MODEL CONTENTS

[0005] Based on the above problems, the utility model aims to provide an anti-freezing ball valve with a simple structure that can prevent freezing and cracking at low temperatures.

[0006] To solve the above problems, the following technical solution is provided: an anti-freezing ball valve includes a valve body. The valve body is provided with a valve cavity. The valve cavity is provided with an inlet and an outlet on both sides. The inlet and the outlet are both provided with a connecting flange. A ball core is provided in the valve cavity and is controlled to rotate by a valve stem. The ball core is provided with through holes that are directed towards the inlet and the outlet or offset from the inlet and the outlet when rotating. The inlet is provided with a first valve seat that is pushed by the connecting flange and in contact with the ball core. The outlet is provided with a second valve seat that is pushed by another connecting flange and in contact with the ball core. The first valve seat and the second valve seat are both annular and provided with annular extrusion surfaces at the contact positions with the ball core. The valve cavity at the position of the inlet and the outer wall of the ball core is connected by a flow guide channel.

[0007] In the structure, the inlet is connected with the valve cavity at the position of the outer wall of the ball core through the flow guide channel; in the open state of the ball core, the through hole of the ball core is directly connected with the pipeline, the valve cavity at the position of the outer wall of the ball core is connected with the inlet position of the pipeline through the flow guide channel, so that the valve cavity is not frozen and cracked at low temperature; in the closed state of the ball core, the through hole of the ball core is connected with the valve cavity at the position of the outer wall of the ball core, and the valve cavity at the position of the outer wall of the ball core is connected with the inlet position of the pipeline through the flow guide channel, so that the valve cavity is not frozen and cracked at low temperature; therefore, the pressure relief and anti-freezing effect can be realized whether the ball core is in the open state or the closed state.

[0008] The utility model further sets up, the flow guide channel includes the first flow guide groove that is located first valve seat outer ring wall on the first valve seat axial direction direction through setting, the end face of the connecting flange of the inlet side or the end face of first valve seat and connecting flange abuts sets up the second flow guide groove that opens to its radial direction, first flow guide groove and second flow guide groove are connected.

[0009] In the structure, the first flow guide groove and the second flow guide groove are opened in the corresponding parts, so that the anti-freezing effect can be realized without changing the basic production process of the ball valve, and the stability of the product is ensured.

[0010] The utility model further sets up, first flow guide groove, second flow guide groove are all several, along the first valve seat circumferential direction balanced arrangement.

[0011] In the structure, the plurality of first flow guide grooves and second flow guide grooves can effectively improve the flow and reduce the risk of blockage.

[0012] The utility model further sets up, one side of first valve seat and its outer ring wall junction of facing connecting flange is equipped with transition surface, transition surface is chamfer surface or round surface.

[0013] In the structure, when the first flow guide groove and the second flow guide groove are misaligned (for example, not aligned during assembly), the transition surface can be used for auxiliary connection and conduction.

[0014] The utility model further sets up, connecting flange is equipped with connecting disc, the outer edge of connecting disc is equipped with several connecting ears balanced arrangement along its circumferential direction, and the connecting ears of adjacent connecting flanges are connected through connecting bolts to fix the valve body between the two.

[0015] In the structure, the installation method has the advantages of high strength and strong maintainability.

[0016] The utility model further sets up, one end of connecting flange away from valve body is equipped with quick chuck.

[0017] In the structure, the quick chuck is used for adapting with the clamp joint to realize the quick connection between the pipelines.

[0018] The utility model further provides for, one side of quick chuck back to valve body is equipped with end surface groove.

[0019] In the above structure, the end surface groove is used for installing the sealing ring to avoid water from jumping after pipeline connection.

[0020] The utility model further provides for, one end of valve rod outer exposure valve body is equipped with handle.

[0021] In the above structure, the handle is used for controlling the rotation of the valve rod.

[0022] The utility model further provides for, the valve body is equipped with the limiting mechanism that is adapted with handle.

[0023] In the above structure, the limiting mechanism is used for limiting the rotation of the handle, and the handle is equipped with a locking hole and a locking slide, which can be locked by an external lock.

[0024] The utility model further provides for, the first valve seat, second valve seat are polytetrafluoroethylene material or brass material.

[0025] In the above structure, the first valve seat and the second valve seat are preferably made of polytetrafluoroethylene.

[0026] The utility model has the beneficial effects that: the valve cavity at the position of the inlet and the outer wall of the ball core is connected through the flow guide channel; in the open state of the ball core, the through hole of the ball core is directly connected with the pipeline, the valve cavity at the position of the outer wall of the ball core is connected with the inlet position of the pipeline through the flow guide channel, so that the valve cavity will not be frozen and cracked at low temperature; in the closed state of the ball core, the through hole of the ball core is connected with the valve cavity at the position of the outer wall of the ball core, and the valve cavity at the position of the outer wall of the ball core is connected with the inlet position of the pipeline through the flow guide channel, so that the valve cavity will not be frozen and cracked at low temperature; therefore, whether the ball core is in the open or closed state, the pressure relief and anti-freezing effect can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0028] Figure 2 It is a full-section three-dimensional structure schematic view of the utility model.

[0029] Figure 3 It is an exploded three-dimensional structure schematic view of the utility model.

[0030] Figure 4 It is a full-section exploded three-dimensional structure schematic view of the utility model.

[0031] Figure 5 It is a three-dimensional structure schematic view of the utility model from another perspective. Figure 3 Another perspective three-dimensional structure schematic view.

[0032] The meaning of the reference signs in the drawing: 10 - valve body; 101 - valve cavity; 102 - inlet; 103 - outlet; 104 - limiting mechanism; 11 - connecting flange; 111 - connecting disc; 112 - connecting lug; 113 - quick-connection chuck; 1131 - end face groove; 12 - valve rod; 13 - ball core; 131 - through hole; 14 - first valve seat; 141 - first flow guide groove; 142 - second flow guide groove; 143 - transition surface; 15 - second valve seat; 16 - flow guide channel; 17 - connecting bolt; 18 - handle; 181 - locking hole; 182 - locking slide; a - annular extrusion surface. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0034] Reference Figures 1 to 5 As Figures 1 to 5 shown in the drawings, the anti-freezing ball valve comprises a valve body 10, the valve body 10 is provided with a valve cavity 101, the valve cavity 101 is provided with an inlet 102 and an outlet 103 on both sides, the inlet 102 and the outlet 103 are provided with connecting flanges 11, the valve cavity 101 is provided with a ball core 13 which is controlled to rotate by a valve rod 12, the ball core 13 is provided with a through hole 131 which is directed to the inlet 102 and the outlet 103 or offset from the inlet 102 and the outlet 103 when rotating, the inlet 102 is provided with a first valve seat 14 which is pushed by the connecting flange 11 and abuts against the ball core 13, the outlet 103 is provided with a second valve seat 15 which is pushed by another connecting flange 11 and abuts against the ball core 13, the first valve seat 14 and the second valve seat 15 are annular and provided with an annular extrusion surface a at the position of abutting against the ball core 13, and the valve cavity 101 at the position of the outer wall of the ball core 13 is connected to the inlet 102 through a flow guide channel 16.

[0035] In the above structure, the valve cavity 101 at the position of the outer wall of the ball core 13 is connected to the inlet 102 through the flow guide channel 16; in the open state of the ball core 13, the through hole 131 of the ball core 13 is directly connected to a pipeline (not shown in the drawing), the valve cavity 101 at the position of the outer wall of the ball core 13 is connected to the position of the inlet 102 of the pipeline (not shown in the drawing) through the flow guide channel 16, so that the valve cavity 101 will not be frozen and cracked at low temperature; in the closed state of the ball core 13, the through hole 131 of the ball core 13 is connected to the valve cavity 101 at the position of the outer wall of the ball core 13, and the valve cavity 101 at the position of the outer wall of the ball core 13 is connected to the position of the inlet 102 of the pipeline through the flow guide channel 16, so that the valve cavity 101 will not be frozen and cracked at low temperature; therefore, whether the ball core 13 is in the open state or the closed state, the pressure relief anti-freezing effect can be achieved.

[0036] In the embodiment, the flow guide channel 16 includes a first flow guide groove 141 formed through the outer ring wall of the first valve seat 14 in the axial direction of the first valve seat 14; the end face of the connecting flange 11 on the inlet 102 side abutting against the first valve seat 14 or the end face of the first valve seat 14 abutting against the connecting flange 11 is provided with a second flow guide groove 142 formed in the radial direction thereof; and the first flow guide groove 141 is connected with the second flow guide groove 142.

[0037] In the above structure, the anti-freezing effect can be achieved only by forming the first flow guide groove 141 and the second flow guide groove 142 at the corresponding positions without changing the basic production process of the existing ball valve, thereby ensuring the stability of the product.

[0038] In the embodiment, the first flow guide groove 141 and the second flow guide groove 142 are a plurality of grooves and are arranged uniformly in the circumferential direction of the first valve seat 14.

[0039] In the above structure, the plurality of first flow guide grooves 141 and the plurality of second flow guide grooves 142 can effectively improve the flow and reduce the risk of blockage.

[0040] In the embodiment, the side of the first valve seat 14 facing the connecting flange 11 is provided with a transition surface 143 at the junction with the outer ring wall thereof, and the transition surface 143 is a chamfered surface or a rounded surface.

[0041] In the above structure, when the first flow guide groove 141 and the second flow guide groove 142 are misaligned (for example, not aligned during assembly), the transition surface 143 can be used for auxiliary connection and conduction.

[0042] In the embodiment, the connecting flange 11 is provided with a connecting disc 111, the outer edge of the connecting disc 111 is provided with a plurality of connecting lugs 112 arranged uniformly in the circumferential direction thereof, and the connecting lugs 112 of adjacent connecting flanges 11 are connected by connecting bolts 17 to fix the valve body 10 between the two connecting flanges 11.

[0043] In the above structure, this mounting method has the advantages of high strength and strong maintainability.

[0044] In the embodiment, the end of the connecting flange 11 away from the valve body 10 is provided with a quick coupling chuck 113.

[0045] In the above structure, the quick coupling chuck 113 is used to adapt to a clamp joint (not shown in the figure) to realize the quick connection between pipelines (not shown in the figure).

[0046] In the embodiment, the side of the quick coupling chuck 113 away from the valve body 10 is provided with an end face groove 1131.

[0047] The end face groove 1131 is used for mounting a sealing ring (not shown in the figure) to avoid water from splashing after the pipeline (not shown in the figure) is connected.

[0048] In the embodiment, one end of the valve stem 12 exposed outside the valve body 10 is provided with a handle 18.

[0049] In the structure, the handle 18 is used for controlling the rotation of the valve stem 12.

[0050] In the embodiment, the valve body 10 is provided with a limiting mechanism 104 (prior art) matched with the handle 18.

[0051] In the structure, the limiting mechanism 104 (prior art) is used for limiting the rotation of the handle 18, and the handle 18 is provided with a locking hole 181 (prior art) and a locking slide 182 (prior art), which can be locked by an external lock (not shown in the figure).

[0052] In the embodiment, the first valve seat 14 and the second valve seat 15 are made of polytetrafluoroethylene or brass.

[0053] In the structure, the first valve seat 14 and the second valve seat 15 are preferably made of polytetrafluoroethylene.

[0054] The utility model discloses the beneficial effect: the valve cavity 101 at the position of the ball core 13 outer wall position is connected through the flow guide channel 16 with the import 102, under the ball core 13 opening state, the through -hole 131 of ball core 13 is directly connected with the pipeline, the valve cavity 101 at the position of the ball core 13 outer wall position is connected through the flow guide channel 16 with the import 102 position of the pipeline, so low temperature will not cause the valve cavity 101 freeze -crack situation to occur, under the ball core 13 closing state, the through -hole 131 of ball core 13 is connected with the valve cavity 101 at the position of the ball core 13 outer wall position, and the valve cavity 101 at the position of the ball core 13 outer wall position is connected through the flow guide channel 16 with the import 102 position of the pipeline, so low temperature will not cause the valve cavity 101 freeze -crack situation to occur, therefore whether ball core 13 is in opening or closing state can realize pressure relief anti -freezing effect.

[0055] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled person in the art, on the premise of not departing from the technical principle of the utility model, a plurality of improvements and variations can be made, and the above-mentioned improvements and variations are also regarded as the protection scope of the utility model.

Claims

1. An antifreeze ball valve, comprising a valve body, the valve body having a valve cavity, an inlet and an outlet respectively provided on both sides of the valve cavity, both the inlet and the outlet having connecting flanges, and a ball core controlled to rotate by a valve stem within the valve cavity, the ball core having a through hole that faces the inlet and outlet or is offset from the inlet and outlet during rotation, characterized in that: The inlet is provided with a first valve seat pushed by a connecting flange and abutting against the ball core, the outlet is provided with a second valve seat pushed by another connecting flange and abutting against the ball core, the first valve seat and the second valve seat are annular and are provided with annular extrusion surfaces at the positions of abutting against the ball core; the inlet and the valve cavity at the position of the outer wall of the ball core are connected through a flow guide channel.

2. The freeze-proof ball valve according to claim 1, characterized in that: The flow guide channel comprises a first flow guide groove penetratingly provided on the outer annular wall of the first valve seat in the axial direction of the first valve seat; the end face of the connecting flange abutting against the first valve seat or the end face of the first valve seat abutting against the connecting flange is provided with a second flow guide groove opened in the radial direction thereof; the first flow guide groove is connected with the second flow guide groove.

3. A freeze-proof ball valve according to claim 2, characterized in that: The first flow guide groove and the second flow guide groove are a plurality of grooves and are uniformly arranged in the circumferential direction of the first valve seat.

4. The freeze-proof ball valve according to claim 2, characterized in that: The side of the first valve seat facing the connecting flange is provided with a transition surface at the junction with the outer annular wall, and the transition surface is a chamfered surface or a rounded surface.

5. A freeze-proof ball valve according to claim 1 or 2 or 3 or 4, characterized in that: The connecting flange is provided with a connecting disc, the outer edge of the connecting disc is provided with a plurality of connecting ears uniformly arranged in the circumferential direction thereof, and the connecting ears of adjacent connecting flanges are connected through connecting bolts to fix the valve body therebetween.

6. A freeze-proof ball valve according to claim 5, characterized in that: The end of the connecting flange away from the valve body is provided with a quick connecting chuck.

7. A freeze-proof ball valve according to claim 6, characterized in that: The side of the quick connecting chuck away from the valve body is provided with an end face groove.

8. The freeze-proof ball valve according to claim 1, characterized in that: The end of the valve rod exposed outside the valve body is provided with a handle.

9. A freeze-proof ball valve according to claim 8, characterized in that: The valve body is provided with a limiting mechanism matched with the handle.

10. The freeze-proof ball valve according to claim 1, characterized in that: The first valve seat and the second valve seat are made of polytetrafluoroethylene or brass.

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