Lengthened rod faucet

Abstract

The utility model 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 utility model belongs to the technical field of tap, and relates to a lengthening rod tap. BACKGROUND

[0002] With the continuous improvement of material level, more and more residences are provided with gardens, and people will plant flowers, grass or vegetables in the gardens. In order to facilitate the spraying of the flowers, grass and vegetables, it is inevitable to set a tap and connect a water pipe for use outdoors. When the tap is closed, water will remain in the tap and the water pipe. In winter or in some areas where the weather is cold all the year round, the tap and the water pipe are prone to freezing due to the remaining water.

[0003] In order to solve the above problems, the applicant improves the structure of the conventional tap and proposes a lengthening rod tap with the application number 201620500950.5. The lengthening rod tap comprises a valve body, the valve body has a water outlet pipe inclined upward on one side, a valve rod is arranged in the valve body, the upper end of the valve rod extends out of the valve body and is connected with a hand wheel, a lengthening connecting sleeve is connected to the lower end of the valve body, the valve body is in the shape of a long rod, the lower end of the valve rod is located in the lengthening connecting sleeve, the lower end of the lengthening connecting sleeve has a water inlet, the inner side of the lengthening connecting sleeve has a water inlet hole above the water inlet, the lower end of the valve rod is fixedly connected with a sealing head, the outer side of the sealing head is threadedly connected with the inner side of the lengthening connecting sleeve, the outer side of the sealing head is uniformly distributed with a plurality of water inlet notches in the circumferential direction, the bottom of the sealing head has an annular mounting groove, and a sealing gasket is arranged in the annular mounting groove to form a seal by abutting against the upper end of the water inlet hole. The lengthening rod tap can be installed in a wall, the lengthening connecting sleeve and the components in the lengthening connecting sleeve are installed in the wall, the hand wheel and the water outlet pipe are located outside the wall, the valve core part in the tap is close to the indoor space through the lengthening valve rod and the lengthening connecting sleeve, the temperature at the valve core part is higher than the outdoor temperature, and the accumulated water at the valve core part is not prone to freezing. Moreover, during actual installation, the upper end of the lengthening connecting sleeve can be installed slightly lower than the lower end of the lengthening connecting sleeve, and the water outlet of the water outlet pipe is lower than the water inlet hole on the lengthening connecting sleeve. In the case that the tap is closed, the accumulated water in the lengthening connecting sleeve can flow out of the lengthening connecting sleeve through the water outlet under the action of gravity, so that the accumulated water will not freeze in the tap.

[0004] However, in actual use, negative pressure will be formed in the internal flow channel and the water pipe when the tap is closed instantaneously. Under the action of the negative pressure, the water in the internal flow channel of the valve body cannot be completely drained by gravity alone, that is, water will remain in the internal flow channel of the valve body and the water pipe. Therefore, the lengthening rod tap has the problem of insufficient anti-freezing effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the above problems in the prior art and provides a lengthening rod tap, which solves the problem of insufficient anti-freezing effect.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A lengthened rod tap, comprising a valve body and a valve rod assembly arranged in the valve body, the valve rod assembly can move along its axial direction and control the communication or isolation of the internal flow passage of the valve body, the side of the valve body is provided with an air inlet hole, characterized in that a control member is threadedly connected in the valve body, the inner end side of the control member is provided with a first sealing ring, the first sealing ring abuts against the inner wall of the valve body to form a seal and block the air inlet hole and the internal flow passage of the valve body, the control member is sleeved on the outer end of the valve rod assembly, a pre-closing spring is sleeved on the valve rod assembly, the inner end of the pre-closing spring abuts against the valve rod assembly, the outer end of the pre-closing spring abuts against the control member, the valve body is provided with a stop portion for limiting the movement range of the control member, when the control member moves to the stop portion in the valve body in the direction of compressing the pre-closing spring, the control member and the inner wall of the valve body have an air gap.

[0008] In the open state of the lengthened lever faucet, the valve stem assembly is in a position to make the internal flow passage of the valve body communicate, at this time the first sealing ring is abutted against the inner wall of the valve body to form a seal and block the air inlet hole and the internal flow passage of the valve body, to ensure that water cannot be directly sprayed from the air inlet hole. Since the water is in a constant flow state, freezing phenomenon will not occur. When it is necessary to close the lengthened lever faucet, the control member is rotated, and the control member is threadedly connected with the valve body and moves while rotating. Since the control member is sleeved on the outer end of the valve stem assembly, the valve stem assembly is externally sleeved with a pre-closing spring, the two ends of the pre-closing spring are abutted against the control member and the valve stem assembly respectively, and at this time the inner end of the valve stem assembly is in an un-abutted state, so that the control member moves by pushing the valve stem assembly through the pre-closing spring. Until the valve stem assembly is pushed to the position to block the internal flow passage of the valve body, the inner end of the valve stem assembly is abutted, at this time the valve stem assembly cannot be pushed open by the water pressure due to the presence of the pre-closing spring (in practice, the pre-closing spring is a relatively thick spring, which requires a relatively large force to be compressed, that is, it is very difficult to overcome the elastic force of the pre-closing spring to push open the valve stem assembly by water pressure), thereby achieving the closing of the lengthened lever faucet. But at this time the pre-closing spring is in a natural extension and contraction state, and has a space that can be compressed, so that when the inner end of the valve stem assembly is already in an abutted state, the control member can continue to be rotated and moved in the same direction (of course, at this time the movement of the control member 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 that the lengthened lever faucet is closed more tightly). After the control member is compressed to abut against the stop portion in the valve body (the setting of the stop portion can ensure that the pre-closing spring can prevent the pre-closing spring from being compressed too much by the control member and being damaged), the first sealing ring is separated from the inner wall of the valve body, so that an air gap is formed between the control member 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 passage of the valve body, at this time the external air can enter the internal flow passage of the valve body through the air inlet hole and break the negative pressure in the internal flow passage of the valve body, so that the water remaining in the internal flow passage of the valve body can be discharged under the action of its own gravity to prevent freezing, thereby improving the anti-freezing effect.

[0009] In the present lengthened lever faucet, the time when the air gap between the control member and the inner wall of the valve body is formed is later than the time when the valve rod assembly blocks the internal flow passage of the valve body, and the air gap formed is large enough, so that the external air can enter the water outlet stably and smoothly and ensure sufficient air intake, thereby ensuring that the residual water can be stably and reliably discharged to achieve anti-freezing, and at the same time, the water will not be directly sprayed from the air inlet hole due to the formation of the large air gap. In addition, this anti-freezing method is automatically realized when the lengthened lever faucet is closed, and the control member not only controls the communication between the air inlet hole and the internal flow passage of the valve body, but also drives the valve rod assembly to move. The entire water cutoff and air intake process only needs to operate the control member, and no additional operation is required for anti-freezing, so the operation is more convenient.

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

[0011] After assembly is completed, the connecting cap is located between the blocking member and the pre-closing spring. Such arrangement enables the valve rod assembly to be moved by the pre-closing spring to close the lengthened lever faucet and open the communication between the air inlet hole and the internal flow passage of the valve body when the control member moves towards its inner end. When the control member moves towards its outer end, the valve rod assembly is pulled to move by the abutment between the connecting cap and the blocking member to open the lengthened lever faucet and block the communication between the air inlet hole and the internal flow passage of the valve body. Through the above arrangement, whether the communication between the air inlet hole and the internal flow passage of the valve body is opened or closed, it only needs to rotate the control member to complete the operation, that is, the operation is more convenient.

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

[0013] The two ends of the pre-closing spring are respectively welded and fixedly connected with the control member and the valve stem assembly. When the control member moves towards the inner end, the pre-closing spring pushes the valve stem assembly to move to close the elongated lever faucet and open the communication between the air inlet hole and the internal flow passage of the valve body. When the control member moves towards the outer end, the pre-closing spring pulls the valve stem assembly to move to open the elongated lever faucet and block the communication between the air inlet hole and the internal flow passage of the valve body. Through the above arrangement, whether the communication between the air inlet hole and the internal flow passage of the valve body is opened or closed, the control member only needs to be rotated, that is, the operation is more convenient.

[0014] In the above-mentioned elongated lever faucet, the main body is provided with an annular protrusion at the middle part in the axial direction, the control member is threadedly connected with the valve body through the annular protrusion, the air inlet hole is located in the valve body at the position for threadedly connecting with the annular protrusion, and the side of the annular protrusion is provided with a plurality of air passing grooves in the circumferential direction. The air passing grooves are straight grooves arranged in the axial direction of the valve stem assembly and pass through the outer end surface of the annular protrusion.

[0015] The main body of the control member is in a cylindrical shape. The annular protrusion arranged at the middle part in the axial direction of the main body enables the cylindrical main body to be threadedly connected with the valve body, thereby ensuring that the control member can move in the axial direction of the valve stem assembly while being rotated. The air passing grooves arranged on the side of the annular protrusion in the circumferential direction are straight grooves arranged in the axial direction of the valve stem assembly, which can directly guide the external air to enter the internal flow passage of the valve body.

[0016] However, since the air passing grooves are straight grooves and the air inlet hole is arranged on the side of the valve body, and the control member moves while being rotated, it is difficult to ensure that the position of the air passing grooves in the circumferential direction of the main body is opposite to the air inlet hole when the first sealing ring is separated from the inner wall of the valve body. The air passing grooves are directly arranged on the outer end surface of the annular protrusion. When the outer end of the annular protrusion is located at the air inlet hole during the movement of the control member, the external air first enters the position in the valve body which is emptied by the movement of the control member, and then directly enters the internal flow passage of the valve body through the straight grooves. Through the above arrangement, the external air can stably enter the water outlet when the elongated lever faucet is in the closed state.

[0017] In the above-mentioned elongated lever faucet, the inner end of the main body is provided with an annular protrusion, the annular protrusion is provided with an annular mounting groove on the outer circumferential surface at the middle part in the axial direction of the valve stem assembly, the first sealing ring is arranged in the annular mounting groove, an annular groove is formed between the annular protrusion, the annular protrusion and the outer wall of the main body, and each air passing groove is in communication with the annular groove.

[0018] The first sealing ring is arranged in the annular mounting groove of the annular shoulder. In practice, the air gap is formed between the annular shoulder and the inner wall of the valve body when the control member moves to abut against the stopper in the valve body. The annular groove is formed between the annular protrusion, the annular shoulder and the outer wall of the main body. The air passing grooves are communicated with the annular groove. Thus, the air flowing along the air passing grooves can be gathered in the annular groove to a certain extent and then flows into the internal passage of the valve body. This can ensure the stability of the air inlet and reliably discharge the residual water.

[0019] In the above-mentioned extended rod faucet, the outer end side of the annular shoulder is provided with a notch groove, 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 shoulder along the axial direction of the valve rod assembly, the annular shoulder has a certain thickness, and the outer end part of the annular shoulder is not 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 shoulder and the inner wall of the valve body, the gap is not enough to form an air gap, and the amount of air that can pass through is very small. However, because the notch groove is arranged at the outer end side of the annular shoulder, the notch groove is communicated with the annular groove. Thus, the air inlet amount when the outer end of the annular shoulder is not exposed can be improved, and it is not necessary to wait until the outer end of the annular shoulder is exposed. Thus, time can be saved, and the discharge efficiency of the residual water can be improved.

[0021] In the above-mentioned extended rod faucet, the number of the notch grooves is several, and the notch grooves are distributed in the circumferential direction.

[0022] Through the above-mentioned arrangement, the air inlet amount when the outer end of the annular shoulder is not exposed can be further increased, and the discharge efficiency of the residual water can be further improved.

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

[0024] The valve stem assembly passes through the stem sleeve, and the inner end of the stem sleeve directly extends into the first connecting body and is used as a stopper during assembly, so that a stopper does not need to be additionally and separately machined in the valve body, thereby making the overall structure more compact. Moreover, the stem sleeve is a part of the valve body, and the strength of the stem sleeve is guaranteed, so that the stopper (i.e., the inner end of the stem sleeve) will not be deformed even if the control member is rotated with great force. Since water flows through the stem sleeve, a plurality of air guide notches are arranged in the circumferential direction of the inner end of the stem sleeve, so that the control member will not completely block the stem sleeve after abutting against the outer end of the stem sleeve.

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

[0026] Like the existing extended-stem faucet, the extended-stem faucet is installed in the transverse direction of the axial direction of the valve stem assembly, and after installation, the second connecting body of the valve body is located indoors, the first connecting body is located outdoors, the second connecting body is upwardly tilted relative to the first connecting body, and the water outlet is downwardly tilted. By arranging the air inlet hole on the same side of the first connecting body as the water outlet, locating the water outlet between the air inlet hole and the water inlet in the axial direction of the valve stem assembly, and locating the first sealing ring between the air inlet hole and the water outlet, that is, the water outlet is closer to the water inlet than the air inlet, so that residual water only flows out of the water outlet and not out of the air inlet.

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

[0028] 1. By arranging the air inlet hole on the side of the valve body and threadedly connecting the control member in the valve body, the inner end side of the control member is provided with the first sealing ring, and when the extended-stem faucet is in a closed state, external air is introduced through the air inlet hole and the internal flow passage of the valve body, thereby breaking the negative pressure in the internal flow passage of the valve body, so that water remaining in the internal flow passage of the valve body can be discharged under the action of its own gravity to prevent freezing, thereby greatly improving the anti-freezing effect.

[0029] 2. By arranging the pre-closing spring, the time at which the air gap between the control member and the inner wall of the valve body is formed is later than the time at which the valve stem assembly blocks the internal flow passage of the valve body, and the finally formed air gap is large enough, so that external air can stably and smoothly enter the water outlet and ensure sufficient air intake, thereby ensuring that residual water can be stably and reliably discharged to achieve anti-freezing, and at the same time, water will not directly spray out of the air inlet hole due to the large air gap.

[0030] 3、The anti-freezing is realized automatically when the extension rod faucet is closed. The control member not only controls the communication between the air inlet hole and the internal flow passage of the valve body, but also drives the valve rod assembly to move. The whole water cutting and air inlet process only needs to operate the control member, and no additional operation is needed for anti-freezing, so the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a sectional view of the extension rod faucet (in an open state).

[0032] Figure 2 is Figure 1 is an enlarged view of the first connecting body in the

[0033] Figure 3 is a sectional view of the control member.

[0034] Figure 4 is Figure 3 is a sectional view of the A-A direction in the

[0035] Figure 5 is Figure 3 is a sectional view of the B-B direction in the

[0036] Figure 6 is a sectional view of the extension rod faucet (in a pre-closed state).

[0037] Figure 7 is a sectional view of the extension rod faucet (when air is in).

[0038] Figure 8 is Figure 7 is an enlarged view of the first connecting body in the

[0039] In the figure, 1, valve body; 1a, first connecting body; 1a1, water outlet; 1a2, air inlet hole; 1b, second connecting body; 1b1, water inlet; 1b2, valve port; 1c, rod sleeve; 1c1, air gap; 1d, stop portion; 2, valve rod assembly; 2a, long connecting rod; 2b, first connecting head; 2c, second connecting head; 2c1, annular convex edge; 3, valve core; 4, check spring; 5, control member; 5a, main body; 5a1, cylindrical connecting portion; 5a2, air passage; 5a3, annular convex portion; 5a4, annular convex 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, air gap. DETAILED DESCRIPTION

[0040] The following is a specific embodiment of the present application combined with the drawings, which further describes the technical scheme of the present application, but the present application is not limited to these embodiments.

[0041] Embodiment One

[0042] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 8 , a lengthened lever faucet includes a valve body 1 and a valve stem assembly 2 arranged in the valve body 1, the valve stem assembly 2 is axially movable and controls the communication or isolation of the internal flow passage of 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 passage, the inner end of the valve stem assembly 2 is slidably connected with a valve core 3, the inner end of the valve stem assembly 2 is provided with a check spring 4, the valve core 3 is abutted 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 inlet pressure, the valve core 3 can be easily pushed away from the valve port 1b2 by overcoming the action of the check spring 4), in order to completely close the valve port 1b2, the valve stem assembly 2 needs to be moved to the inner end and abut against the valve core 3 and press the valve core 3 on the valve port 1b2. The side of the valve body 1 is provided with an air inlet hole 1a2, the lengthened lever faucet further includes a control member 5, the control member 5 is threadedly connected in the valve body 1, the inner end side of the control member 5 is provided with a first sealing ring 6, the first sealing ring 6 is abutted against the inner wall of the valve body 1 to form a seal and block the air inlet hole 1a2 and the internal flow passage of the valve body 1. 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, the inner end of the pre-closing spring 9 is abutted against the valve stem assembly 2, the outer end of the pre-closing spring 9 is abutted against the control member 5, the valve body 1 has a stop portion 1d for limiting the movement range of the control member 5, when the control member 5 moves to the stop portion 1d abutted in the valve body 1 in the direction of compressing the pre-closing spring 9, the control member 5 has an air gap 11 between the inner wall of the valve body 1.

[0043] Further, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the control member 5 comprises a cylindrical main body 5a with an open inner end and a connecting cap 5b threadedly connected to the inner end of the main body 5a (in practice, the main body 5a and the connecting cap 5b are glued at the threadedly connected position to ensure that they are fixed together), the connecting cap 5b has a through hole in the axial direction of the valve stem assembly 2, the outer end of the valve stem assembly 2 passes through the through hole into the main body 5a, and the outer end of the valve stem assembly 2 is integrally connected or fixedly connected with the blocking member 8. The side of the valve stem assembly 2 is provided with an annular protrusion 2c1, and the pre-closing spring 9 abuts between the annular protrusion 2c1 and the connecting cap 5b. The first sealing ring 6 is arranged outside the inner end of the main body 5a, and the outer end of the main body 5a is provided with a hexagonal columnar connecting portion 5a1 in cross section, in practice, the control member 5 can be rotated by sleeving a handle with an inner hexagonal hole on the columnar connecting portion 5a1. The main body 5a is provided with an annular protrusion 5a3 in the circumferential direction at the middle position in the axial direction thereof, the control member 5 is threadedly connected with the valve body 1 through the annular protrusion 5a3, the air inlet hole 1a2 is located at the position in the valve body 1 for threadedly connecting with the annular protrusion 5a3, the side of the annular protrusion 5a3 is provided with a plurality of air passing grooves 5a2 in the circumferential direction, the air passing grooves 5a2 are straight grooves arranged in the axial direction of the valve stem assembly 2 and pass through the outer end face of the annular protrusion 5a3, and the outer end of the annular protrusion 5a3 is located at the air inlet hole 1a2 when the control member 5 drives the valve stem assembly 2 to move to the position for blocking the internal flow passage of the valve body 1. The outer side of the inner end of the main body 5a is provided with an annular shoulder 5a4, the annular shoulder 5a4 is provided with an annular mounting groove in the outer circumferential face thereof along the middle position in the axial direction of the valve stem assembly 2, the first sealing ring 6 is arranged in the annular mounting groove, the annular protrusion 5a3, the annular shoulder 5a4 and the outer wall of the main body 5a form an annular groove 5a5, and each air passing groove 5a2 communicates with the annular groove 5a5. The outer side of the annular shoulder 5a4 is provided with a plurality of notched grooves 5a6, and the notched grooves 5a6 communicate with the annular groove 5a5. The number of the notched grooves 5a6 is several, and each notched groove 5a6 is distributed in the circumferential direction.

[0044] In the present embodiment, as Figure 1 and Figure 2As shown, the valve body 1 comprises a first connecting body 1a, a second connecting body 1b and a stem sleeve 1c fixedly connected between the first connecting body 1a and the second connecting body 1b, the valve stem assembly 2 passes through the stem sleeve 1c, the water outlet 1a1 and the air inlet hole 1a2 are both located on the first connecting body 1a, the water inlet 1b1 and the valve port 1b2 are both located on the second connecting body 1b, the inner end of the stem sleeve 1c is located in the first connecting body 1a and the stop portion 1d is actually the outer end of the stem sleeve 1c, the outer end of the stem sleeve 1c is provided with a plurality of air passing notches 1c1 in the circumferential direction. The water outlet 1a1 is located on the side of the first connecting body 1a, and the water outlet 1a1 is inclined relative to the valve stem assembly 2 and arranged towards the outer end of the first connecting body 1a, the air inlet hole 1a2 is parallel to the water outlet 1a1, and the inner side of the mounting seat 10 is inclined. The air inlet hole 1a2 and the water outlet 1a1 are located on the same side of the first connecting body 1a, the water outlet 1a1 is located between the air inlet hole 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 hole 1a2 and the water outlet 1a1. The lengthened rod faucet is actually a lengthened rod faucet used outdoors but installed through the wall, specifically, an installation hole is opened on the wall during installation, one end of the installation hole located outdoors is lower than the other end of the installation hole located indoors, the stem sleeve 1c of the valve body 1 passes through the installation hole, and the mounting seat 10 is fixed on the wall located outdoors by fasteners. As mentioned in the background art, after installation is completed, the first connecting body 1a of the valve body 1 is located outdoors, 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 stem sleeve 1c will also automatically adhere to the inner wall of the stem sleeve 1c and flow into the water outlet 1a1 under the action of gravity. The air inlet hole 1a2 is parallel to the water outlet 1a1, which means that after installation is completed, the air inlet hole 1a2 is also arranged downward, which can ensure that external rainwater cannot enter the valve body 1 from the air inlet hole 1a2. The valve stem assembly 2 comprises a long connecting rod 2a, a first connecting head 2b and a second connecting head 2c, the long connecting rod 2a is a hollow tubular, the inner end of the long connecting rod 2a is fixedly connected with the outer end of the first connecting head 2b, the second connecting head 2c is columnar, the inner end of the second connecting head 2c is inserted into the outer end of the long connecting rod 2a and fixedly connected with each other, the annular convex edge 2c1 is located on the outer side of the second connecting head 2c, and the blocking piece 8 is a nut screwed on the outer end of the second connecting head 2c. The valve core 3 is slidingly 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] In the open state of the lengthened rod faucet, Figure 1 and Figure 2As shown, the valve stem assembly 2 is in a position to make the internal flow passage of the valve body 1 communicate, at this time, the first sealing ring 6 is in abutment with the inner wall of the valve body 1 to form a seal and block the inlet hole 1a2 and the internal flow passage of the valve body 1, to ensure that water cannot be directly sprayed from the inlet hole 1a2. The water from the water inlet 1b1 will push the valve core 3 to open under the action of water pressure, and then enter the first connecting body 1a through the stem sleeve 1c and flow 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 outside the water outlet 1a1.

[0046] When it is necessary to close the extended rod faucet, the control member 5 is rotated, and the control member 5 is threadedly connected with 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 are respectively abutted on 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 an un-abutted state, so that when the control member 5 moves, the valve stem assembly 2 is pushed to move by the pre-closing spring 9. Until the valve stem assembly 2 is pushed to the position of blocking the internal flow passage of the valve body 1, the inner end of the valve stem assembly 2 abuts on the valve core 3 and pushes the valve core 3 to press on the valve port 1b2, at this time, the valve stem assembly 2 is not pushed open by the water pressure due to the existence of the pre-closing spring 9 (in fact, the pre-closing spring 9 is a relatively thick spring, which needs a relatively large force to be compressed, that is, it is very difficult to overcome the elastic force of the pre-closing spring 9 to push open the valve stem assembly 2 by the water pressure), thereby achieving the closing of the extended rod faucet, as shown in Figure 6 As shown, at this time, the pre-closing spring 9 is in a natural extension state and the first sealing ring 6 is not separated from the inner wall of the valve body 1. Because the pre-closing spring 9 is in a natural extension state, it has a space that can be compressed, so that when the inner end of the valve stem assembly 2 is in an abutted state, the control member 5 can continue to be rotated and moved in the same direction (of course, at this time, the movement of the control member 5 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 is compressed to abut on the stop portion 1d in the valve body 1 (the setting of the stop portion 1d can ensure that the pre-closing spring 9 can prevent the pre-closing spring 9 from being compressed too much by the control member 5 and being damaged), the first sealing ring 6 is separated from the inner wall of the valve body 1, so that the air gap 11 is formed between the control member 5 and the inner wall of the valve body 1, as shown in Figure 7 and Figure 8As shown, that is, the first sealing ring 6 no longer blocks between the air inlet hole 1a2 and the internal flow passage of the valve body 1, at this time the external air can enter the internal flow passage of the valve body 1 through the air inlet hole 1a2 and break the negative pressure in the internal flow passage of the valve body 1, so that the water remaining in the internal flow passage of the valve body 1 can be discharged under the action of its own gravity to prevent freezing.

[0047] Embodiment two

[0048] The structure and principle of the embodiment are basically the same as those of the embodiment one, and the difference lies in that in the embodiment, the two ends of the pre-closing spring 9 are respectively welded and fixedly connected with the control member 5 and the valve rod assembly 2. The two ends of the pre-closing spring 9 are respectively welded and fixedly connected with the control member 5 and the valve rod assembly 2, and such a setting makes the control member 5 move towards the inner end direction to push the valve rod assembly 2 to move through the pre-closing spring 9 to close the lengthened rod faucet and open the communication between the air inlet hole 1a2 and the internal flow passage of the valve body 1; when the control member 5 moves towards the outer end direction, the pre-closing spring 9 is pulled and the valve rod assembly 2 is pulled to move through the pre-closing spring 9 to open the lengthened rod faucet and block the communication between the air inlet hole 1a2 and the internal flow passage of the valve body 1.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A lengthened lever faucet, comprising a valve body (1) and a valve stem assembly (2) disposed in the valve body (1), the valve stem assembly (2) being axially movable and controlling the communication or isolation of a flow passage in the valve body (1), a side of the valve body (1) being provided with an air inlet hole (1a2), characterized in that, The valve body (1) is internally threaded with a control member (5), the inner end side of the control member (5) is provided with a first sealing ring (6), the first sealing ring (6) is abutted against the inner wall of the valve body (1) to form a seal and block the air inlet hole (1a2) and the internal flow passage of the valve body (1), the control member (5) is sleeved on the outer end of the valve stem assembly (2), the valve stem assembly (2) is externally sleeved with a pre-closing spring (9), the inner end of the pre-closing spring (9) is abutted against the valve stem assembly (2), the outer end of the pre-closing spring (9) is abutted against the control member (5), the valve body (1) has a stop portion (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) to abut against the stop portion (1d) in the valve body (1), the control member (5) has a ventilation gap (11) between the inner wall of the valve body (1).

2. A lengthening rod faucet according to claim 1, characterized in that The control member (5) includes a cylindrical main body (5a) with an open inner end and a connecting cap (5b) threaded into 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 convex edge (2c1), and the pre-closing spring (9) is abutted between the annular convex edge (2c1) and the connecting cap (5b).

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

4. A lengthening rod faucet according to claim 2, wherein The main body (5a) is provided with an annular protrusion (5a3) at the circumferential middle position in the axial direction, the control member (5) is threaded with the valve body (1) through the annular protrusion (5a3), the air inlet hole (1a2) is located at the position in the valve body (1) for being threaded with the annular protrusion (5a3), and the side of the annular protrusion (5a3) is provided with a plurality of air passing grooves (5a2) in the circumferential direction, the air passing grooves (5a2) are straight grooves arranged in the axial direction of the valve stem assembly (2) and penetrate the outer end face of the annular protrusion (5a3).

5. A lengthening rod tap according to claim 4, wherein The inner end of the main body (5a) is provided with an annular shoulder (5a4) on the outer side, the annular shoulder (5a4) is provided with an annular mounting groove in the outer circumferential surface at the middle in the axial direction of the valve stem assembly (2), the first sealing ring (6) is arranged in the annular mounting groove, and the annular protrusion (5a3), the annular shoulder (5a4) and the outer wall of the main body (5a) form an annular groove (5a5).

6. A lengthening rod tap according to claim 5, wherein The outer end side of the annular shoulder (5a4) is provided with a notched groove (5a6), and the notched groove (5a6) is communicated with the annular groove (5a5).

7. A lengthening rod tap according to claim 6, wherein The number of the notched grooves (5a6) is a plurality, and each notched groove (5a6) is distributed in the circumferential direction.

8. A lengthening rod tap according to claim 2 or 3, wherein 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), a valve rod assembly (2) passes through the rod sleeve (1c), an air inlet hole (1a2) is located on the first connecting body (1a), a water outlet (1a1) is further arranged on the first connecting body (1a), a water inlet (1b1) is arranged on the second connecting body (1b), an inner end of the rod sleeve (1c) is located in the first connecting body (1a), and a stop portion (1d) is an outer end of the rod sleeve (1c), and a plurality of air guide notches (1c1) are arranged on the outer end of the rod sleeve (1c) in a circumferential direction.

9. A lengthening rod tap according to claim 8, wherein The air inlet hole (1a2) and the water outlet (1a1) are located on the same side of the first connecting body (1a), the water outlet (1a1) is located between the air inlet hole (1a2) and the water inlet (1b1) in an axial direction of the valve rod assembly (2), and the first sealing ring (6) is located between the air inlet hole (1a2) and the water outlet (1a1).

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