Lengthened rod faucet

Abstract

The invention provides an extension bar faucet, and belongs to the technical field of faucets. The problem that the anti-freezing effect is insufficient is solved. The valve comprises a valve body and a valve rod assembly, the valve rod assembly can move in the axial direction of the valve body and control communication or separation of a flow channel in the valve body, an air inlet is formed in the side portion of the valve body, a control piece is in threaded connection with the interior of the valve body, and a first sealing ring is arranged on the side portion of the inner end of the control piece. The first sealing ring abuts against the inner wall of the valve body to form sealing and is blocked between the air inlet hole and a flow channel in the valve body, the control piece is connected to the outer end of the valve rod assembly in a sleeving mode, the valve rod assembly is sleeved with a pre-closing spring, the inner end of the pre-closing spring abuts against the valve rod assembly, and the outer end of the pre-closing spring abuts against the control piece. A stop part for limiting the moving range of the control piece is arranged in the valve body, and when the control piece moves in the direction of compressing the pre-closing spring till the control piece abuts against the stop part in the valve body, a ventilation gap is formed between the control piece and the inner wall of the valve body. The device has the advantages of good anti-freezing effect, convenience in operation and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of faucets and relates to an extended-rod faucet. Background Art

[0002] With the continuous improvement of material standards, more and more houses have their own gardens (especially in some developed countries), where people grow flowers, plants or vegetables. In order to spray flowers, plants and vegetables, it is inevitable to install a faucet outdoors and connect it to a water pipe for use. When the faucet is closed, water will remain inside the faucet and in the water pipe. In this case, in winter when the temperature is low or in some areas with cold weather all year round, it is easy for the faucet and water pipe to freeze due to the residual water.

[0003] In order to solve the above problems, the applicant has improved the conventional faucet structure and proposed an extended rod faucet with application number 201620500950.5, which includes a valve body, one side of the valve body has an upward inclined water outlet pipe, a valve stem is arranged in the valve body, the upper end of the valve stem extends upward out of the valve body and is connected to a handwheel, the lower end of the valve body is connected to an extended connecting sleeve, the valve body is in the shape of a long rod and the lower end of the valve stem is located in the extended connecting sleeve, the lower end of the extended connecting sleeve has a water inlet, the inner side of the extended connecting sleeve has a water inlet hole above the water inlet, the lower end of the valve stem is fixedly connected with a sealing head, the outer side of the sealing head is threadedly connected to the inner side of the extended connecting sleeve, the outer side of the sealing head is evenly distributed with a number of water inlet notches along the circumferential direction, the bottom of the sealing head has an annular mounting groove, a sealing gasket is arranged in the annular mounting groove, and the sealing gasket abuts against the upper port of the water inlet hole to form a seal. The extended rod faucet can be installed in the wall, and the extended connecting sleeve and the components in the extended connecting sleeve are installed in the wall, while the hand wheel and the water outlet pipe are located outside the wall. The valve core part of the faucet is made closer to the room by extending the valve stem and the extension connection, so that the temperature at the valve core is higher than the outdoor temperature, and the accumulated water at the valve core is not easy to freeze; and in actual installation, the upper end of the extended connecting sleeve can be installed slightly lower than the lower end of the extended connecting sleeve, and at the same time, the water outlet of the water outlet pipe is made lower than the water inlet hole on the extended connecting sleeve. When the faucet is closed, the accumulated water in the extended connecting sleeve can flow out from the extended connecting sleeve through the water outlet under the action of gravity, so that the accumulated water will not freeze in the faucet.

[0004] However, in practice, when the valve is closed instantly, negative pressure will be formed in the internal flow channel and the water pipe. Under the action of negative pressure, gravity alone cannot completely drain the water in the internal flow channel of the valve body. In other words, there will still be water remaining in the internal flow channel of the valve body and the water pipe. Therefore, the above-mentioned extended stem faucet has the problem of insufficient antifreeze effect. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to provide an extended-stem faucet to solve the problem of insufficient antifreeze effect.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] 1. The faucet of claim 1, wherein the faucet has a plurality of camshafts, each of which is adapted to move toward the cam face of the control member, the plurality of camshafts being adapted to move toward the cam face of the control member, the plurality of camshafts being adapted to move toward the cam face of the control member, and the plurality of camshafts being adapted to move toward the cam face of the control member.

[0008] When the extended stem faucet is in the open state, the valve stem assembly is in a position to connect the internal flow channel of the valve body. At this time, the first sealing ring abuts against the inner wall of the valve body to form a seal and block between the air inlet and the internal flow channel of the valve body, ensuring that water will not spray out directly from the air inlet. Since the water is in a state of constant flow, it will not freeze. When it is necessary to close the extended stem faucet, turn the control member. The control member and the valve body are threadedly connected and will move while rotating. Since the control member is sleeved on the outer end of the valve stem assembly, a pre-closing spring is provided on the outer sleeve of the valve stem assembly. The two ends of the pre-closing spring abut against the control member and the valve stem assembly respectively, and at this time the inner end of the valve stem assembly is in a state of not being abutted. Therefore, when the control member moves, it will push the valve stem assembly to move through the pre-closing spring. Until the valve stem assembly is pushed to the position where the flow channel inside the valve body is blocked, the inner end of the valve stem assembly is abutted, and at this time, the valve stem assembly will not be pushed open by water pressure in the direction of its outer end due to the presence of the pre-closing spring (in practice, the pre-closing spring is a relatively thick spring, and it requires a relatively large force when it is compressed, that is, it is difficult to overcome the elastic force of the pre-closing spring and push the valve stem assembly open by water pressure alone), thereby achieving the closing of the extended stem faucet. However, the pre-closing spring is in a natural expansion and contraction state at this time, and it has a space that can be compressed. Therefore, when the inner end of the valve stem assembly is already in a state of being abutted, the control member can continue to be rotated and moved in the same direction (of course, because the valve stem assembly will not move anymore at this time, the movement of the control member at this time is relative to the valve stem assembly, and in this process, as the pre-closing spring is compressed by the control member, the elastic force acting on the valve stem assembly becomes greater, so the extended stem faucet is closed more tightly). When the control part compresses the pre-closing spring and moves it to abut against the stop part in the valve body (the setting of the stop part can ensure that the pre-closing spring can prevent the pre-closing spring from being damaged by excessive compression of the control part), the first sealing ring is separated from the inner wall of the valve body, so that a ventilation gap is formed between the control part and the inner wall of the valve body, that is, the first sealing ring no longer blocks the air inlet hole and the internal flow channel of the valve body. At this time, external air can enter the internal flow channel of the valve body through the air inlet hole and break the negative pressure in the internal flow channel of the valve body, so that the water remaining in the internal flow channel of the valve body can be discharged under the action of its own gravity to prevent freezing, thereby greatly improving the antifreeze effect.

[0009] In the extended stem faucet, by setting the pre-closing spring, the time when the ventilation gap is formed between the control part and the inner wall of the valve body is later than the valve stem assembly isolating the internal flow channel of the valve body, and the ventilation gap finally formed is also large enough, thereby ensuring that the external air can stably and smoothly enter the water outlet and ensure sufficient air intake, thereby ensuring that the residual water can be stably and reliably discharged to achieve antifreeze, and at the same time, there will be no situation where water is directly sprayed out from the air inlet hole due to ensuring a large enough ventilation gap. In addition, this antifreeze method is automatically realized when the extended stem faucet is closed. The control part not only controls the connection between the air inlet hole and the internal flow channel of the valve body, but also has the function of driving the valve stem assembly to move. The entire process of water cutting and air intake only requires operating the control part, and no additional operation is required for antifreeze, so it is more convenient to operate.

[0010] In the above-mentioned extended stem faucet, the control member includes a cylindrical main body with an inner end open and a connecting cap threadedly connected to the inner end of the main body, the outer end of the valve stem assembly passes through the connecting cap, the outer end of the valve stem assembly is integrally connected or fixedly connected with a blocking member, the side of the valve stem assembly is provided with an annular flange, and the pre-closing spring rests between the annular flange and the connecting cap.

[0011] After the assembly is completed, the connecting cap is located between the blocking member and the pre-closing spring. With this arrangement, when the control member moves toward its inner end, the pre-closing spring can push the valve stem assembly to move to close the extended stem faucet and open the connection between the air inlet and the internal flow channel of the valve body; when the control member moves toward its outer end, the connecting cap and the blocking member can form abutment to pull the valve stem assembly to move to open the extended stem faucet and block the connection between the air inlet and the internal flow channel of the valve body. Through the above arrangement, whether opening the extended stem faucet to block the connection between the air inlet and the internal flow channel of the valve body or closing the extended stem faucet to open the connection between the air inlet and the internal flow channel of the valve body, it can be completed by simply turning the control member, which means that the operation is more convenient.

[0012] In the above-mentioned extended stem faucet, as another technical solution, the two ends of the pre-closing spring are respectively welded and fixedly connected to the control member and the valve stem assembly.

[0013] The two ends of the pre-closing spring are respectively welded and fixedly connected to the control part and the valve stem assembly. Such a setting enables the control part to move toward its inner end and push the valve stem assembly to move through the pre-closing spring to close the extended stem faucet and open the connection between the air inlet and the internal flow channel of the valve body; when the control part moves toward its outer end, it will pull the pre-closing spring and pull the valve stem assembly to move through the pre-closing spring to open the extended stem faucet and block the connection between the air inlet and the internal flow channel of the valve body. Through the above-mentioned setting, whether opening the extended stem faucet to block the connection between the air inlet and the internal flow channel of the valve body or closing the extended stem faucet to open the connection between the air inlet and the internal flow channel of the valve body, it can be completed by simply turning the control part, which means that the operation is more convenient.

[0014] In the above-mentioned extended stem faucet, the main body is provided with an annular protrusion along the circumferential direction at the middle position of its axial direction, the control part is threadedly connected to the valve body through the annular protrusion, the air inlet is located in the valve body at a position for threaded connection with the annular protrusion, and the side of the annular protrusion is provided with a plurality of air grooves along the circumferential direction, the air grooves are straight grooves arranged along the axial direction of the valve stem assembly and the air grooves pass through the outer end surface of the annular protrusion.

[0015] The main body of the control member is cylindrical, and an annular protrusion is provided at the middle position of the main body in the axial direction, so that the cylindrical main body can be threadedly connected with the valve body, thereby ensuring that the control member can rotate and move along the axial direction of the valve stem assembly. By providing an air passage groove along the circumferential direction on the side of the annular protrusion, the air passage groove is a straight groove provided along the axial direction of the valve stem assembly, so that the external air can be guided straightly to ensure that it can quickly enter the internal flow channel of the valve body.

[0016] However, because the air groove is a straight groove, and the air inlet is set on the side of the valve body, and the control part moves while rotating, it is difficult to ensure that the position of the air groove along the circumference of the main body is exactly opposite to the air inlet when the first sealing ring is in a position separated from the inner wall of the valve body. By opening the air groove directly to the outer end surface of the annular protrusion, when the control part moves to the outer end of the annular protrusion at the air inlet, the external air first enters the position of the valve body vacated by the annular protrusion after the control part moves, and then can directly enter the internal flow channel of the valve body through the straight air groove. Through the above-mentioned arrangement, it is ensured that the external air can stably enter the water outlet when the extended stem faucet is in the closed state.

[0017] In the above-mentioned extended stem faucet, an annular boss is provided on the outer side of the inner end of the main body, and an annular boss is provided with an annular mounting groove along its outer peripheral surface in the middle part of the axial direction of the valve stem assembly. The first sealing ring is arranged in the annular mounting groove, and an annular groove is formed between the annular protrusion, the annular boss and the outer wall of the main body, and each air groove is connected to the annular groove.

[0018] The first sealing ring is arranged in the annular mounting groove of the annular boss. In practice, when the control member moves to abut against the stopper in the valve body, the ventilation gap is formed between the annular boss and the inner wall of the valve body. An annular groove is formed between the annular protrusion, the annular boss and the outer wall of the main body. Each air passing groove is connected to the annular groove, so that the air flowing along each air passing groove can be gathered in the annular groove to a certain extent before flowing into the internal channel of the valve body, so that the air intake stability can be ensured and the residual water can be discharged reliably.

[0019] In the above-mentioned extended stem faucet, a notch groove is provided on the outer end side of the annular boss, and the notch groove is communicated with the annular groove.

[0020] Because the first sealing ring is arranged at the middle position of the annular boss along the axial direction of the valve stem assembly, and the annular boss has a certain thickness, the outer end of the annular boss has not yet been exposed when the first sealing ring is just separated from the inner wall of the valve body. At this time, although there is a gap between the annular boss and the inner wall of the valve body, it is not enough to form a ventilation gap, and the amount of ventilation is very small. However, because a notch groove is arranged on the side of the outer end of the annular boss, and the notch groove is connected to the annular groove, the air intake can be greatly improved when the outer end of the annular boss is not exposed, so there is no need to wait until the outer end of the annular boss is fully exposed, thereby saving time and improving the discharge efficiency of residual water.

[0021] In the above-mentioned extended stem faucet, the number of the notched grooves is several, and the notched grooves are distributed along the circumferential direction.

[0022] Through the above arrangement, the air intake volume before the outer end of the annular boss is exposed can be further increased, thereby further improving the discharge efficiency of residual water.

[0023] In the above-mentioned extended rod faucet, the valve body includes a first connector, a second connector and a rod sleeve fixedly connected between the first connector and the second connector, the valve stem assembly passes through the rod sleeve, the air inlet is located in the first connector and the first connector is also provided with a water outlet, the second connector is provided with a water inlet, the inner end of the rod sleeve is located in the first connector and the stopper is the outer end of the rod sleeve, and the outer end of the rod sleeve is provided with a plurality of air guide notches along the circumferential direction.

[0024] The valve stem assembly passes through the rod sleeve. During assembly, the inner end of the rod sleeve is directly inserted into the first connecting body and used as a stopper. In this way, there is no need to process a stopper separately in the valve body, which can make the overall structure more compact. Moreover, as a part of the valve body, the strength of the rod sleeve is guaranteed. Even if the control member is turned with great force, the stopper (i.e., the inner end of the rod sleeve) will not be squeezed and deformed. Since water is to flow through the rod sleeve, a number of air guide notches are provided along the circumferential direction at the inner end of the rod sleeve so that the rod sleeve will not be completely blocked after the control member abuts against the outer end of the rod sleeve.

[0025] In the above-mentioned extended stem faucet, the air inlet and the water outlet are located on the same side of the first connector, the water outlet is located between the air inlet and the water inlet along the axial direction of the valve stem assembly, and the first sealing ring is located between the air inlet and the water outlet.

[0026] Like the existing extended-stem faucets, this extended-stem faucet is also installed through the wall with the axial direction of the valve stem assembly as the horizontal direction. After installation, the second connector of the valve body is located indoors, the first connector is located outdoors, and the second connector is tilted upward relative to the first connector, while the water outlet is facing downward. By setting the air inlet and the water outlet to be located on the same side of the first connector, the water outlet is located between the air inlet and the water inlet along the axial direction of the valve stem assembly, and the first sealing ring is located between the air inlet and the water outlet, that is, the water outlet is closer to the water inlet than the air inlet, so that the residual water will only flow out from the water outlet and not from the air inlet.

[0027] Compared with the prior art, the extended rod faucet has the following advantages:

[0028] 1. An air inlet is provided on the side of the valve body, and a control member is threadedly connected to the valve body. A first sealing ring is provided on the inner side of the control member. When the extended stem faucet is in a closed state, the air inlet is connected to the internal flow channel of the valve body to allow external air to enter, thereby breaking the negative pressure in the internal flow channel of the valve body, so that the water remaining in the internal flow channel of the valve body can be discharged under the action of its own gravity to prevent freezing, thereby greatly improving the antifreeze effect;

[0029] 2. By setting the pre-closing spring, the time when the ventilation gap is formed between the control part and the inner wall of the valve body is later than the time when the valve stem assembly isolates the internal flow channel of the valve body, and the ventilation gap finally formed is also large enough, thereby ensuring that the external air can stably and smoothly enter the water outlet and ensure sufficient air intake, thereby ensuring that the residual water can be stably and reliably discharged to achieve antifreeze, and at the same time, water will not be directly sprayed out from the air inlet due to ensuring a large enough ventilation gap;

[0030] 3. Antifreeze is automatically achieved when the extended stem faucet is closed. The control component not only controls the connection between the air inlet and the internal flow channel of the valve body, but also drives the valve stem assembly to move. The entire process of water cutting and air intake only requires operating the control component, and no additional operation is required for antifreeze, so the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional view of the extended-stem faucet (in the open state).

[0032] Figure 2 yes Figure 1 Magnified view of the first connector.

[0033] Figure 3 It is a cross-sectional view of the control component.

[0034] Figure 4 yes Figure 3 Sectional view along AA direction.

[0035] Figure 5 yes Figure 3 Cross-sectional view along the BB axis.

[0036] Figure 6 It is a cross-sectional view of the extended stem faucet (in a pre-closing state).

[0037] Figure 7 It is a cross-sectional view of the extended-stem faucet (when air is being taken in).

[0038] Figure 8 yes Figure 7 Magnified view of the first connector.

[0039] In the figure, 1, valve body; 1a, first connecting body; 1a1, water outlet; 1a2, air inlet; 1b, second connecting body; 1b1, water inlet; 1b2, valve port; 1c, rod sleeve; 1c1, air gap; 1d, stopper; 2, valve stem assembly; 2a, long connecting rod; 2b, first connecting head; 2c, second connecting head; 2c1, annular flange; 3, valve core; 4, check spring; 5, control member; 5a, main body; 5a1, columnar connecting part; 5a2, air groove; 5a3, annular protrusion; 5a4, annular shoulder; 5a5, annular groove; 5a6, notch groove; 5b, connecting cap; 6, first sealing ring; 7, second sealing ring; 8, blocking member; 9, pre-closing spring; 10, mounting seat; 11, ventilation gap. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0041] Embodiment 1

[0042] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, an extended stem faucet includes a valve body 1 and a valve stem assembly 2 inserted in the valve body 1, the valve stem assembly 2 can move along its axial direction and control the connection or isolation of the flow channel inside the valve body 1. Specifically, the valve body 1 has a water inlet 1b1 and a water outlet 1a1, the valve body 1 is provided with a valve port 1b2 in the internal flow channel, the inner end of the valve stem assembly 2 is slidably connected with a valve core 3, a check spring 4 is provided in the inner end of the valve stem assembly 2, the valve core 3 abuts against the valve port 1b2 under the elastic force of the check spring 4, the valve core 3 and the check spring 4 constitute a check structure (under the action of the water pressure of the inlet water, the valve core 3 can overcome the action of the check spring 4 and easily push away from the valve port 1b2), in order to completely close the valve port 1b2, the valve stem assembly 2 needs to move to the inner end to abut against the valve core 3 and press the valve core 3 against the valve port 1b2. An air inlet 1a2 is provided on the side of the valve body 1. The extended stem faucet also includes a control member 5, which is threadedly connected to the valve body 1. A first sealing ring 6 is provided on the inner side of the control member 5. The first sealing ring 6 abuts against the inner wall of the valve body 1 to form a seal and block the air inlet 1a2 and the internal flow channel of the valve body 1. The control member 5 is sleeved on the outer end of the valve stem assembly 2. A pre-closing spring 9 is provided on the outer sleeve of the valve stem assembly 2. The inner end of the pre-closing spring 9 abuts against the valve stem assembly 2. The outer end of the pre-closing spring 9 abuts against the control member 5. A stopper 1d is provided in the valve body 1 to limit the movement range of the control member 5. When the control member 5 moves in the direction of compressing the pre-closing spring 9 until the control member 5 abuts against the stopper 1d in the valve body 1, a ventilation gap 11 is provided between the control member 5 and the inner wall of the valve body 1.

[0043] Furthermore, if Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the control member 5 includes a cylindrical main body 5a with an inner end opening and a connecting cap 5b threadedly connected to the inner end of the main body 5a (in practice, glue is applied to the main body 5a and the connecting cap 5b at the threaded connection to ensure that the two are fixed together). The connecting cap 5b has a through hole along the axial direction of the valve stem assembly 2, and the outer end of the valve stem assembly 2 passes through the through hole into the main body 5a. The outer end of the valve stem assembly 2 is integrally connected or fixedly connected with a blocking member 8. The side of the valve stem assembly 2 is provided with an annular convex edge 2c1, and the pre-closing spring 9 abuts between the annular convex edge 2c1 and the connecting cap 5b. The first sealing ring 6 is provided on the outer side of the inner end of the main body 5a, and the outer end of the main body 5a is protruding with a columnar connecting portion 5a1 with a hexagonal cross section. In practice, the control member 5 can be rotated by sleeve-fitting a handle with a hexagonal inner hole on the columnar connecting portion 5a1. The main body 5a is provided with an annular protrusion 5a3 along the circumferential direction at the middle position of its axial direction. The control member 5 is threadedly connected to the valve body 1 through the annular protrusion 5a3. The air inlet hole 1a2 is located in the valve body 1 at a position for threaded connection with the annular protrusion 5a3. The side of the annular protrusion 5a3 is provided with a plurality of air grooves 5a2 along the circumferential direction. The air grooves 5a2 are straight grooves arranged along the axial direction of the valve stem assembly 2 and the air grooves 5a2 pass through the outer end surface of the annular protrusion 5a3. When the control member 5 drives the valve stem assembly 2 to move to a position where the internal flow channel of the valve body 1 is blocked, the outer end of the annular protrusion 5a3 is located at the air inlet hole 1a2. An annular boss 5a4 is provided on the outer side of the inner end of the main body 5a. An annular mounting groove is provided along the outer peripheral surface of the annular boss 5a4 in the middle of the axial direction of the valve stem assembly 2. The first sealing ring 6 is arranged in the annular mounting groove. An annular groove 5a5 is formed between the annular protrusion 5a3, the annular boss 5a4 and the outer wall of the main body 5a. Each of the air passing grooves 5a2 is connected to the annular groove 5a5. A notch groove 5a6 is provided on the outer end side of the annular boss 5a4. The notch groove 5a6 is connected to the annular groove 5a5. There are a plurality of notch grooves 5a6, and each notch groove 5a6 is distributed along the circumferential direction.

[0044] In this embodiment, if Figure 1 and Figure 2As shown, the valve body 1 includes a first connecting body 1a, a second connecting body 1b, and a rod sleeve 1c fixedly connected between the first connecting body 1a and the second connecting body 1b, the valve stem assembly 2 passes through the rod sleeve 1c, the water outlet 1a1 and the air inlet 1a2 are both located in the first connecting body 1a, the water inlet 1b1 and the valve port 1b2 are both located in the second connecting body 1b, the inner end of the rod sleeve 1c is located in the first connecting body 1a and the stopper 1d is actually the outer end of the rod sleeve 1c, and the outer end of the rod sleeve 1c is provided with a plurality of air notches 1c1 along the circumferential direction. The water outlet 1a1 is located at the side of the first connecting body 1a, the water outlet 1a1 is inclined relative to the valve stem assembly 2 toward the outer end of the first connecting body 1a, the air inlet 1a2 is parallel to the water outlet 1a1, the inner end of the first connecting body 1a is fixedly connected to a mounting seat 10, and the inner side surface of the mounting seat 10 is inclined. The air inlet 1a2 and the water outlet 1a1 are located on the same side of the first connector 1a, the water outlet 1a1 is located between the air inlet 1a2 and the water inlet 1b1 along the axial direction of the valve stem assembly 2, and the first sealing ring 6 is located between the air inlet 1a2 and the water outlet 1a1. The extended stem faucet is actually an extended stem faucet used outdoors but installed through a wall. Specifically, during installation, a mounting hole is opened on the wall, the end of the mounting hole located outdoors is lower than the end of the mounting hole located indoors, the rod sleeve 1c of the valve body 1 passes through the mounting hole, and the mounting seat 10 is fixed to the wall outdoors by fasteners. Similar to the extended rod faucet mentioned in the background technology, after installation, the first connecting body 1a of the valve body 1 is located outdoors, and the second connecting body 1b is located indoors, and the second connecting body 1b is tilted upward relative to the first connecting body 1a, and the water outlet 1a1 is downward. In this state, the water in the rod sleeve 1c will automatically flow to the water outlet 1a1 along the inner wall of the rod sleeve 1c under the action of gravity. The air inlet 1a2 is parallel to the water outlet 1a1, which means that after installation, the air inlet 1a2 is also set downward, which can ensure that external rainwater will not enter the valve body 1 through the air inlet 1a2. The valve stem assembly 2 includes a long connecting rod 2a, a first connecting head 2b and a second connecting head 2c. The long connecting rod 2a is a hollow tube, the inner end of the long connecting rod 2a is fixedly connected to the outer end of the first connecting head 2b, the second connecting head 2c is a column, the inner end of the second connecting head 2c is inserted into the outer end of the long connecting rod 2a and fixed to each other, the annular convex edge 2c1 is located on the outer side of the second connecting head 2c and the blocking member 8 is a nut threadedly connected to the outer end of the second connecting head 2c. The valve core 3 is slidably connected to the inner end of the first connecting head 2b, and the check spring 4 is arranged in the inner end of the first connecting head 2b.

[0045] When the extension faucet is turned on, Figure 1 and Figure 2As shown, the valve stem assembly 2 is in a position to connect the internal flow channel of the valve body 1. At this time, the first sealing ring 6 abuts against the inner wall of the valve body 1 to form a seal and block between the air inlet 1a2 and the internal flow channel of the valve body 1, ensuring that water will not be directly sprayed out from the air inlet 1a2. The water coming in from the water inlet 1b1 pushes the valve core 3 open under the action of the check spring 4, and thus enters the first connecting body 1a through the stem sleeve 1c and flows into the water pipe from the water outlet 1a1. In this state, because the water is always flowing, there will be no freezing in the water pipe connected to the water outlet 1a1.

[0046] When the extended-stem faucet needs to be closed, the control member 5 is rotated. The control member 5 is threadedly connected to the valve body 1 and moves while rotating. Since the control member 5 is sleeved on the outer end of the valve stem assembly 2, the valve stem assembly 2 is provided with a pre-closing spring 9, and the two ends of the pre-closing spring 9 respectively abut against the control member 5 and the valve stem assembly 2, and at this time, the inner end of the valve stem assembly 2 is in a non-abutted state, so when the control member 5 moves, the pre-closing spring 9 pushes the valve stem assembly 2 to move. Until the valve stem assembly 2 is pushed to the position where the internal flow channel of the valve body 1 is blocked, the inner end of the valve stem assembly 2 abuts against the valve core 3 and presses the valve core 3 against the valve port 1b2. At this time, the valve stem assembly 2 will not be pushed open by water pressure in the direction of its outer end due to the presence of the pre-closing spring 9 (in practice, the pre-closing spring 9 is a relatively thick spring, which requires a relatively large force when compressed, that is, it is difficult to overcome the elastic force of the pre-closing spring 9 and push open the valve stem assembly 2 by water pressure alone), thereby achieving the closing of the extended stem faucet, just like Figure 6 As shown, at this time, the pre-closing spring 9 is in a naturally extended state and the first sealing ring 6 has not yet separated from the inner wall of the valve body 1. Because the pre-closing spring 9 is in a naturally extended state, it has space that can be compressed. Therefore, when the inner end of the valve stem assembly 2 is already in a state of being abutted, the control member 5 can continue to be rotated and moved in the same direction (of course, because the valve stem assembly 2 will no longer move at this time, the movement of the control member 5 at this time is relative to the valve stem assembly 2, and in this process, as the pre-closing spring 9 is compressed by the control member 5, the elastic force acting on the valve stem assembly 2 becomes greater, so that the extended rod faucet is closed more tightly). After the control member 5 compresses the pre-closing spring 9 and moves it to abut against the stopper 1d in the valve body 1 (the setting of the stopper 1d can ensure that the pre-closing spring 9 can prevent the pre-closing spring 9 from being over-compressed by the control member 5 and damaged), the first sealing ring 6 separates from the inner wall of the valve body 1, so that a ventilation gap 11 is formed between the control member 5 and the inner wall of the valve body 1, as shown in FIG. Figure 7 and Figure 8As shown, the first sealing ring 6 no longer blocks the air inlet hole 1a2 and the internal flow channel of the valve body 1. At this time, external air can enter the internal flow channel of the valve body 1 through the air inlet hole 1a2 and break the negative pressure in the internal flow channel of the valve body 1, so that the water remaining in the internal flow channel of the valve body 1 can be discharged under the action of its own gravity to prevent freezing.

[0047] Embodiment 2

[0048] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the two ends of the pre-closing spring 9 are respectively welded and fixedly connected to the control member 5 and the valve stem assembly 2. The two ends of the pre-closing spring 9 are respectively welded and fixedly connected to the control member 5 and the valve stem assembly 2. Such an arrangement enables the control member 5 to move toward its inner end and push the valve stem assembly 2 to move through the pre-closing spring 9 to close the extended stem faucet and open the connection between the air inlet 1a2 and the internal flow channel of the valve body 1; when the control member 5 moves toward its outer end, it pulls the pre-closing spring 9 and pulls the valve stem assembly 2 to move through the pre-closing spring 9 to open the extended stem faucet and block the connection between the air inlet 1a2 and the internal flow channel of the valve body 1.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An extended stem faucet, comprising a valve body (1) and a valve stem assembly (2) inserted into the valve body (1), wherein the valve stem assembly (2) can move along its axial direction and control the connection or isolation of the flow channel inside the valve body (1), and an air inlet hole (1a2) is provided on the side of the valve body (1), characterized in that: The valve body (1) is internally threadedly connected to a control member (5), and a first sealing ring (6) is provided on the inner end side of the control member (5). The first sealing ring (6) abuts against the inner wall of the valve body (1) to form a seal and block the air inlet (1a2) and the internal flow channel of the valve body (1). The control member (5) is sleeved on the outer end of the valve stem assembly (2), and a pre-closing spring (9) is provided on the outer sleeve of the valve stem assembly (2). The inner end of the pre-closing spring (9) abuts against the valve stem assembly (2), and the outer end of the pre-closing spring (9) abuts against the control member (5). The valve body (1) has a stopper (1d) for limiting the movement range of the control member (5). When the control member (5) moves in the direction of compressing the pre-closing spring (9) until the control member (5) abuts against the stopper (1d) in the valve body (1), a ventilation gap (11) is provided between the control member (5) and the inner wall of the valve body (1).

2. The extended stem faucet according to claim 1, characterized in that: The control member (5) comprises a cylindrical main body (5a) with an inner end open and a connecting cap (5b) threadedly connected to the inner end of the main body (5a); the outer end of the valve stem assembly (2) passes through the connecting cap (5b); the outer end of the valve stem assembly (2) is integrally connected or fixedly connected with a blocking member (8); the side of the valve stem assembly (2) is provided with an annular flange (2c1); and a pre-closing spring (9) abuts between the annular flange (2c1) and the connecting cap (5b).

3. The extended stem faucet according to claim 1, characterized in that: The two ends of the pre-closing spring (9) are respectively welded and fixedly connected to the control component (5) and the valve stem assembly (2).

4. An extended stem faucet according to claim 2 or 3, characterized in that: The main body (5a) is provided with an annular protrusion (5a3) along the circumferential direction at the middle position of its axial direction, the control member (5) is threadedly connected to the valve body (1) through the annular protrusion (5a3), the air inlet (1a2) is located in the valve body (1) at a position for threaded connection with the annular protrusion (5a3), and the side of the annular protrusion (5a3) is provided with a plurality of air grooves (5a2) along the circumferential direction, the air grooves (5a2) are straight grooves arranged along the axial direction of the valve stem assembly (2), and the air grooves (5a2) pass through the outer end surface of the annular protrusion (5a3).

5. The extended stem faucet according to claim 4, characterized in that: An annular boss (5a4) is provided on the outer side of the inner end of the main body (5a), and an annular mounting groove is provided on the outer peripheral surface of the annular boss (5a4) along the axial middle part of the valve stem assembly (2). The first sealing ring (6) is arranged in the annular mounting groove, and an annular groove (5a5) is formed between the annular protrusion (5a3), the annular boss (5a4) and the outer wall of the main body (5a), and each air groove (5a2) is connected to the annular groove (5a5).

6. The extended stem faucet according to claim 5, characterized in that: The outer end side of the annular boss (5a4) is provided with a notch groove (5a6), and the notch groove (5a6) is communicated with the annular groove (5a5).

7. The extended stem faucet according to claim 6, characterized in that: The number of the notch grooves (5a6) is several, and the notch grooves (5a6) are distributed along the circumferential direction.

8. The extended stem faucet according to claim 2 or 3, characterized in that: The valve body (1) comprises a first connecting body (1a), a second connecting body (1b) and a rod sleeve (1c) fixedly connected between the first connecting body (1a) and the second connecting body (1b); the valve stem assembly (2) passes through the rod sleeve (1c); the air inlet (1a2) is located in the first connecting body (1a) and the first connecting body (1a) is also provided with a water outlet (1a1); the second connecting body (1b) is provided with a water inlet (1b1); the inner end of the rod sleeve (1c) is located in the first connecting body (1a) and the stopper (1d) is the outer end of the rod sleeve (1c); and the outer end of the rod sleeve (1c) is provided with a plurality of air guide notches (1c1) along the circumferential direction.

9. The extended stem faucet according to claim 8, characterized in that: The air inlet (1a2) and the water outlet (1a1) are located on the same side of the first connector (1a), the water outlet (1a1) is located between the air inlet (1a2) and the water inlet (1b1) along the axial direction of the valve stem assembly (2), and the first sealing ring (6) is located between the air inlet (1a2) and the water outlet (1a1).

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