Pilot valve and control valve device

Abstract

The present invention discloses a pilot valve and a control valve device. The pilot valve includes a valve body unit, a valve core and a driving rod; the valve body unit includes a valve body, the valve core can slide in the valve body and divides the inner cavity of the valve body into a pressure chamber and a water outlet chamber through the valve core, a sealing member is installed on the end face of the valve core corresponding to the water outlet chamber, the valve body is provided with two openings for connecting the water outlet chamber, the two openings are respectively arranged on the side wall and the bottom wall of the valve body, and whether the sealing member contacts and seals the valve body is controlled by the sliding of the valve core to control the on-off of the two openings; the inner end of the driving rod is connected to the valve core together to drive the valve core to slide through the driving rod, and the outer end of the driving rod extends out of the valve body; the two openings can be set as the water inlet and the water distribution port of the pilot valve as required so that the pilot valve can be assembled into bottom water inlet and side water outlet or bottom water outlet and side water inlet. It has the following advantages: it is convenient to interchange the water inlet and the water outlet.

Description

Technical Field

[0001] The present invention relates to a waterway control device, and in particular to a pilot valve and a control valve device. Background Art

[0002] The existing pilot valve includes a valve body unit, a valve core, and a driving rod; the valve body unit includes a valve body, the valve core can slide in the valve body and divides the inner cavity of the valve body into a pressure chamber and a water outlet chamber through the valve core, a sealing member is installed on the end face of the valve core corresponding to the water outlet chamber, the valve body is provided with two openings communicating with the water outlet chamber, and whether the sealing member contacts and seals the valve body is controlled by the sliding of the valve core to control the on-off of the two openings; the inner end of the driving rod is connected to the valve core together to drive the valve core to slide through the driving rod, and the outer end of the driving rod extends out of the valve body. The two openings are respectively the water inlet and the water distribution port of the pilot valve, and can only be set to bottom water inlet and side water outlet or bottom water outlet and side water inlet, and cannot be replaced according to needs. Summary of the Invention

[0003] The present invention provides a pilot valve and a control valve device, which overcome the deficiencies of the pilot valve in the background art.

[0004] One of the technical solutions adopted by the present invention to solve its technical problems is: a pilot valve, including a valve body unit, a valve core, and a driving rod; the valve body unit includes a valve body and two cover bodies, the valve core can slide in the valve body and divides the inner cavity of the valve body into a pressure chamber and a water outlet chamber through the valve core, a sealing member is installed on the end face of the valve core corresponding to the water outlet chamber, the valve body is provided with two openings communicating with the water outlet chamber, and whether the sealing member contacts and seals the valve body is controlled by the sliding of the valve core to control the on-off of the two openings; the inner end of the driving rod is connected to the valve core together to drive the valve core to slide through the driving rod, and the outer end of the driving rod extends out of the valve body; one cover body is sleeved outside the driving rod and is located in the pressure chamber, and the other cover body is sleeved outside the driving rod and is located outside the valve body. A water hole is formed between each cover body and the driving rod, the two water holes are coaxially arranged along the driving rod, and the water hole formed by the cover body located in the pressure chamber is a water replenishing hole, and the water hole formed by the cover body located outside the valve body is a water discharging hole.

[0005] In one embodiment: the two openings are respectively arranged on the side wall and the bottom wall of the valve body.

[0006] In one embodiment: the valve core includes a pressure forming seat, the sealing member is installed on the end face of the pressure forming seat corresponding to the water outlet chamber, and a first elastic body is arranged between the cover body located in the pressure chamber and the end wall of the valve body corresponding to the pressure chamber.

[0007] In one embodiment: a first sealing ring is installed on the outer peripheral wall of the pressure forming seat, and the first sealing ring is sealingly connected to the inner peripheral wall of the valve body.

[0008] In one embodiment: The pressure-forming seat is provided with a first through hole penetrating along the sliding direction, and the inner end of the driving rod extends out of the first through hole. The first through hole is a stepped hole that is larger at the top and smaller at the bottom and includes a large-hole section and a small-hole section. The cover body located in the pressure-forming cavity protrudes downward with a protruding portion, and the protruding portion is placed in the large-hole section. The cover body located in the pressure-forming cavity is supported on the pressure-forming seat.

[0009] In one embodiment: The end wall of the pressure-forming seat facing the pressure-forming cavity is recessed with a groove, and a part of the cover body located in the pressure-forming cavity is located in the groove and is supported on the bottom of the groove.

[0010] In one embodiment: The outer end wall of the valve body is recessed to form a mounting groove, and the cover body located outside the valve body protrudes with a protruding portion, and the protruding portion is placed in the mounting groove.

[0011] In one embodiment: The valve body unit includes an outer pressure cover. The outer pressure cover is located outside the valve body and is fixedly connected to the valve body relatively. The outer end of the driving rod passes through the outer pressure cover, and the cover body located outside the valve body is between the outer pressure cover and the valve body.

[0012] In one embodiment: A pressure relief channel is provided between the outer pressure cover and the valve body. The pressure relief channel is located outside the valve body and connects the first water hole and the second water hole.

[0013] In one embodiment: The valve body unit is provided with a pressure relief channel. The pressure relief channel is located outside the valve body and connects two water holes.

[0014] In one embodiment: It is equipped with two driving rods. The outer peripheral walls of the two driving rods are both recessed with annular notches. The positions of the annular notches of the two driving rods are different. The two cover bodies are the first cover body and the second cover body respectively; the annular notch of one driving rod cooperates with the first cover body. The first cover body is installed in the pressure-forming cavity, and the second cover body is located outside the valve body. The annular notch of the other driving rod cooperates with the first cover body. The first cover body is located outside the valve body, and the second cover body is installed in the pressure-forming cavity.

[0015] In one embodiment: It is also equipped with two second sealing rings. The two driving rods are the first driving rod and the second driving rod respectively;

[0016] The annular notch of the first driving rod cooperates with the first cover body. The first cover body is installed in the pressure-forming cavity, and the second cover body is located outside the valve body. The two second sealing rings are both sleeved on the driving rod and are respectively arranged on both sides of the second cover body. The opening located on the side wall constitutes the water outlet, and the opening located on the bottom wall constitutes the water inlet;

[0017] The annular notch of the second driving rod cooperates with the first cover body. The first cover body is located outside the valve body, and the second cover body is installed in the pressure-forming cavity. The two second sealing rings are both sleeved on the driving rod, and the second cover body and the first cover body are between the two second sealing rings. The opening located on the side wall constitutes the water inlet, and the opening located on the bottom wall constitutes the water outlet.

[0018] In one embodiment: the valve body unit also includes a shell, the valve body and the shell are relatively fixed, the drive rod can slide relative to the shell, an automatic ballpoint pen mechanism is provided between the drive rod and the shell, and the drive rod constitutes the refill of the automatic ballpoint pen mechanism.

[0019] In one embodiment: the automatic ballpoint pen mechanism includes a ratchet seat, an upper ratchet, an adapter and a second elastic body; a ratchet seat is provided on the inner periphery of the upper section of the shell, the upper ratchet can be slidably connected in the ratchet seat and the upper ratchet and the ratchet seat cooperate, the ratchet seat, the upper ratchet and the outer pressure cover are all provided with ratchets, the drive rod passes through the upper ratchet and the ratchet seat, the adapter is fixed to the upper end of the drive rod, the adapter extends above the ratchet seat and constitutes a button of the automatic ballpoint pen mechanism.

[0020] In one embodiment: the automatic ballpoint pen mechanism includes an upper ratchet, a button housing, a lower ratchet and a second elastic body; the upper end of the drive rod is installed in the lower ratchet, the lower ratchet is installed in the upper ratchet, the upper ratchet is installed in the button housing, and the button housing is installed in the upper section of the housing; the upper ratchet, button housing, and the bottom end of the lower ratchet are all provided with ratchet teeth and surrounded by the drive rod; the button housing extends out of the housing and constitutes a button of the automatic ballpoint pen mechanism.

[0021] The second technical solution adopted by the present invention to solve its technical problem is: a pilot valve, including a valve body unit, a valve core and a driving rod; the valve body unit includes a valve body, the valve core can be slidably arranged in the valve body and the inner cavity of the valve body is divided into a pressure cavity and a water outlet cavity by the valve core, the end face of the valve core corresponding to the water outlet cavity is equipped with a sealing member, the valve body is provided with two openings connected to the water outlet cavity, the two openings are respectively arranged on the side wall of the valve body and the bottom wall of the valve body, and the sealing member is controlled to contact the sealing valve body by sliding the valve core to control the opening and closing of the two openings; the inner end of the driving rod and the valve core are assembled together to drive the valve core to slide through the driving rod, and the outer end of the driving rod extends out of the valve body; the two openings can be set as the water inlet and water diversion port of the pilot valve according to needs so that the pilot valve can be assembled into a bottom water inlet and side water outlet or a bottom water outlet and side water inlet.

[0022] The third technical solution adopted by the present invention to solve its technical problems is: a control valve device, including the pilot valve and the water inlet and outlet components, the water inlet and outlet components including an outer sleeve and a lower connecting part, the outer sleeve can be rotatably sleeved on the outside of the valve body part, the lower connecting part includes a stator fixed relative to the valve body part and a movable plate that can rotate relative to the stator, the outer sleeve is sleeved on the outside of the lower connecting part and transmission connected to the movable plate, the outer sleeve is provided with a first water port that can be connected to an opening, the stator is provided with a second water port that can be connected to the above-mentioned other opening, and the movable plate is provided with two control ports, and the two control ports cooperate with the second water port.

[0023] Compared with the background technology, this technical solution has the following advantages:

[0024] The two openings can be set as the water inlet and water outlet of the pilot valve as needed so that the pilot valve can be assembled into bottom water inlet and side water outlet or bottom water outlet and side water inlet, thereby facilitating the interchange of the water inlet and water outlet, and realizing modular production.

[0025] The two water holes are coaxially arranged along the drive rod. The water inlet and outlet can be interchanged through different assembly methods, meeting the water path requirements of various occasions such as showers and faucets. It has strong applicability. In addition, the entire pilot valve has a compact structure and can be matched with various appearances.

[0026] The first through hole is a stepped hole that is larger at the top and smaller at the bottom and includes a large hole section and a small hole section. A protrusion is protruded from the bottom of the cover body inside the valve body, and the protrusion is placed in the large hole section. The cover body is supported on a pressure seat and has a compact structure.

[0027] The end wall of the pressure seat facing the pressure cavity is concavely provided with a groove, and the cover body part located in the valve body is located in the groove and supported on the bottom of the groove, with a compact structure.

[0028] A pressure relief channel is provided between the outer pressure cover and the valve body. The pressure relief channel is located outside the valve body and connected to the two water holes, and has a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 It is a three-dimensional diagram of the control valve device of embodiment 1.

[0031] Figure 2 It is a cross-sectional schematic diagram of a control valve device of Example 1 in a closed state with side water inlet and bottom water outlet.

[0032] Figure 3 It is a cross-sectional schematic diagram of a control valve device of Example 1, which is in the open state with side water inlet and bottom water outlet.

[0033] Figure 4 It is a cross-sectional schematic diagram of the control valve device of Example 1, showing the bottom water inlet side and water outlet and in a closed state.

[0034] Figure 5 It is a cross-sectional schematic diagram of the control valve device of Example 1, showing the bottom water inlet side and water outlet and in an open state.

[0035] Figure 6 It is a cross-sectional exploded schematic diagram of the control valve device of Example 1.

[0036] Figure 7 It is a three-dimensional exploded schematic diagram of the control valve device of Example 1.

[0037] Figure 8 It is a half-section exploded perspective view of the control valve device of Example 1.

[0038] Figure 9 It is a three-dimensional schematic diagram of the first drive rod of the control valve device in the first embodiment.

[0039] Figure 10 It is a three-dimensional schematic diagram of the second drive rod of the control valve device in the first embodiment.

[0040] Figure 11 It is a schematic diagram of an application example of the control valve device in the first embodiment.

[0041] Figure 12 It is a three-dimensional view of the pilot valve in the second embodiment.

[0042] Figure 13 It is a sectional schematic diagram of the side-inlet bottom-outlet pilot valve in the second embodiment and in the closed state.

[0043] Figure 14 It is a sectional schematic diagram of the side-inlet bottom-outlet pilot valve in the second embodiment and in the open state.

[0044] Figure 15 It is a sectional schematic diagram of the bottom-inlet side-outlet pilot valve in the second embodiment and in the closed state.

[0045] Figure 16 It is a sectional schematic diagram of the bottom-inlet side-outlet pilot valve in the second embodiment and in the open state.

[0046] Figure 17 It is a three-dimensional exploded schematic diagram of the pilot valve in the second embodiment.

[0047] Figure 18 It is a half-sectional three-dimensional exploded schematic diagram of the pilot valve in the second embodiment.

[0048] Figure 19 It is one of the schematic diagrams of application examples of the pilot valve in the second embodiment.

[0049] Figure 20 It is another schematic diagram of application examples of the pilot valve in the second embodiment.

[0050] Figure 21 It is yet another schematic diagram of application examples of the pilot valve in the second embodiment.

[0051] Label description: Pilot valve A, water inlet and outlet assembly B, faucet body C; valve body unit 1, valve core 2, drive rod 3, first cover 4, second cover 5, pressure relief passage 6, automatic ballpoint pen mechanism 7; valve body 11, housing 12, outer pressure cover 13; fixed seat 111, base 112, first opening 113, second opening 114, pressure forming chamber 115, water outlet chamber 116, installation groove 117; pressure forming seat 21, groove 211, first through hole 212, first sealing ring 213, seal 22; buckle 31, annular notch 32, second sealing ring 33; first water hole 41, first elastic body 42, first protrusion 43; second water hole 51, second protrusion 52; ratchet seat 71, upper ratchet 72, adapter 73 and second elastic body 74; outer sleeve 81, lower seat 82, fixed piece 83, moving piece 84. Detailed implementation

[0052] Embodiment 1

[0053] Please refer to Figures 1 to 10 , The control valve device includes a pilot valve A and a water inlet and outlet assembly B. The pilot valve A includes a valve body unit 1, a valve core 2 and a drive rod 3. The valve body unit 1 includes a valve body 11, a housing 12 and an outer pressure cover 13.

[0054] The valve body 11 includes a fixed seat 111 and a base 112. The fixed seat 111 and the base 112 are fixedly connected together to form an inner cavity in the valve body 11. The side wall of the base 112 is provided with a first opening 113, and the bottom wall of the base 112 is provided with a second opening 114. The valve core 2 is slidably disposed in the valve body 11, and the inner cavity of the valve body 11 is divided into a pressure forming chamber 115 and a water outlet chamber 116 by the valve core 2. The first opening 113 and the second opening 114 are both connected to the water outlet chamber 116. The valve core 2 includes a pressure forming seat 21. A circular groove is recessed on the bottom surface (the end surface corresponding to the water outlet chamber) of the pressure forming seat 21. A seal 22 is installed in the circular groove. Whether the seal 22 contacts and seals the base 112 of the valve body 11 is controlled by the sliding of the valve core 2 to control the on-off of the two openings 113 and 114, so as to control the opening and closing of the pilot valve A. The inner end of the drive rod 3 is connected to the pressure forming seat 21 of the valve core 2 to drive the valve core 2 to slide through the drive rod 3, and the outer end of the drive rod 3 extends out of the valve body 11 for the user to control.

[0055] The pilot valve A further includes two cover bodies 4, 5 and a pressure relief passage 6. One cover body is sleeved outside the driving rod 3 and located in the pressure forming cavity 115. A first water hole 41 is formed between this cover body and the driving rod 3. The other cover body is sleeved outside the driving rod 3 and located outside the valve body 11. A second water hole 51 is formed between the other cover body and the driving rod 3. The second water hole 51 and the first water hole 41 are coaxially arranged along the driving rod 3. The pressure relief passage 6 is located outside the valve body 11 and connects the first water hole 41 and the second water hole 51. Further, a first elastic body 42 is provided between the cover body located in the pressure forming cavity 115 and the top wall (the end wall corresponding to the pressure forming cavity) of the fixed seat 111 of the valve body 11.

[0056] A groove 211 is concavely formed on the top surface (the end wall facing the pressure forming cavity) of the pressure forming seat 21. A first through hole 212 penetrating along the sliding direction is concavely formed at the bottom of the groove 211. The first through hole 212 is a stepped hole with a larger upper part and a smaller lower part and includes a large hole section and a small hole section. The inner end of the driving rod 3 extends out of the first through hole 212. Another buckle 31 is provided. The buckle 31 is assembled at the inner end of the driving rod 3 so that when at low pressure, the driving rod 3 can drive the pressure forming seat 21 to move. A first sealing ring 213 is installed on the outer peripheral wall of the pressure forming seat 21. The first sealing ring 213 is hermetically connected to the inner peripheral wall of the fixed seat 111 of the valve body 11 to hermetically isolate the pressure forming cavity and the water distribution cavity. The buckle 31 cooperates with the driving rod. When at low pressure, the pressure forming seat is pulled up to solve the problem that it cannot be closed at low pressure.

[0057] The housing 12 and the valve body 11 are relatively fixed. The housing 12 is located on the valve body 11. The external pressure cover 13 is fixedly connected to the lower port of the housing 12. An installation groove 117 is concavely formed on the upper end wall of the fixed seat 111 of the valve body 11. The cover body located outside the valve is between the external pressure cover 13 and the fixed seat 111 of the valve body 11. The pressure relief passage 6 is provided between the external pressure cover 13 and the fixed seat 111 of the valve body 11.

[0058] The outer end of the driving rod 3 passes through the external pressure cover 13, and the driving rod 3 can slide relative to the housing 12. An automatic ballpoint pen mechanism 7 is provided between the driving rod 3 and the housing 12. The driving rod 3 constitutes the pen core of the automatic ballpoint pen mechanism 7. The automatic ballpoint pen mechanism 7 includes a ratchet seat 71, an upper ratchet 72, a transfer member 73 and a second elastic body 74. The ratchet seat 71 is provided on the inner circumference of the upper section of the housing. The upper ratchet 72 can be slidably connected in the ratchet seat 71 and the upper ratchet cooperates with the ratchet seat 71. Ratchet teeth are provided on the ratchet seat 71, the upper ratchet 72 and the external pressure cover 13. The driving rod passes through the upper ratchet and the ratchet seat. And because the driving rod passes through the upper ratchet and the ratchet seat, and both the upper ratchet and the ratchet seat are sleeved outside the driving rod, the height of the automatic ballpoint pen mechanism 7 can be shortened. The transfer member 73 is fixedly connected to the upper end of the driving rod. The transfer member extends above the ratchet seat 71 and constitutes the key of the automatic ballpoint pen mechanism.

[0059] The pilot valve A of this embodiment is provided with two drive rods 3, 3' and two second sealing rings 33. The outer peripheral walls of the two drive rods are both recessed with annular notches 32, 32', and the positions of the annular notches of the two drive rods are different. The two drive rods 3, 3' are respectively the first drive rod 3 and the second drive rod 3', the two covers 4, 5 are respectively the first cover 4 and the second cover 5, the first cover is provided with a first protruding portion 43 below it, and the second cover 5 is provided with a second protruding portion 52 below it. Among them: 1. As Figure 2 and 3 , the annular notch 32 of the first drive rod 3 cooperates with the first cover 4. The first cover 4 is located in the pressure-forming cavity, the second cover 5 is located outside the valve body. One of the second sealing rings 33 and the drive rod cooperate to form a pressure relief hole, and the second cover and the drive rod cooperate to form a water replenishing hole; the two second sealing rings 33 are both sleeved on the drive rod, and the second cover and the first cover are located between the two second sealing rings. The opening located on the side wall constitutes the water inlet, and the opening located on the bottom wall constitutes the water outlet; the first protruding portion 43 protrudes downward from the first cover, and the first protruding portion 43 is placed in the large hole section. The first cover 4 is supported on the bottom of the groove of the pressure-forming seat 21 so that a part of the first cover 4 is located in the groove; the second cover is provided with a second protruding portion 52 protruding downward, and the second protruding portion 52 is placed in the installation groove 117. 2. As Figure 4 and 5 , the annular notch 32' of the second drive rod 3' cooperates with the first cover 4. The first cover 4 is located outside the valve body, the second cover 5 is located in the pressure-forming cavity. One of the second sealing rings 33 and the drive rod cooperate to form a water drainage hole, and the second cover and the drive rod cooperate to form a water replenishing hole; the two second sealing rings are both sleeved on the drive rod and are respectively arranged on both sides of the first cover 4. The opening located on the side wall constitutes the water inlet, and the opening located on the bottom wall constitutes the water outlet; the first protruding portion 43 of the first cover is placed in the installation groove 117, and the second protruding portion 52 of the second cover is placed in the large hole section. Therefore, as long as the drive rod is replaced and the setting position of the second sealing ring is adjusted accordingly, the replacement of side water inlet and bottom water outlet and bottom water inlet and side water outlet can be satisfied, so that the side water inlet and bottom water outlet and the bottom water inlet and side water outlet can share most components and realize modular production.

[0060] The water inlet and outlet assembly B includes an outer sleeve 81 and a lower connection part. The outer sleeve can be rotatably sleeved outside the valve body part 1. The lower connection part includes a lower seat 82 fixedly connected to the lower port of the outer sleeve, a fixed piece 83 fixed under the base, and a moving piece 84 fixedly connected to the lower seat and capable of rotating relative to the fixed piece. The outer sleeve is provided with a first water passing port capable of connecting to an opening, the fixed piece is provided with a second water passing port capable of connecting to the other opening, and the moving piece is provided with two control ports, and the two control ports cooperate with the second water passing port. Among them: when the bottom water inlet and side water outlet are used, the two control ports are respectively connected to cold and hot water to realize water temperature control by rotation; when the side water inlet and bottom water outlet are used, the two control ports are respectively connected to two water branch paths to realize water path switching control by rotation.

[0061] The pilot valve of this embodiment can be assembled into a structure with bottom inlet and side outlet or side inlet and bottom outlet. The drive rod penetrates through the second cover body and the first cover body to form a normally open first water hole or a non-normally open pressure relief hole; the fixed seat and the external pressure cover are divided into upper and lower parts. The upper part is normally sealed by the external pressure cover and the drive rod, and the lower part cooperates with the second cover body or the first cover body to form a non-normal sealing state or a normally open state. Among them: the pressure of the water inlet cavity + the pressure of the water outlet cavity = the pressure of the pressure-forming cavity. When the drive rod is sealed with the second sealing ring on the second cover body, the pressure-forming seat is in a balanced state and is moved downward by the first elastic body on the pressure-forming seat to seal with the base. Therefore, the pressure of the water outlet cavity is static pressure and equal to 0. So the pressure of the pressure-forming cavity > the pressure of the water inlet cavity, and the pressure-forming seat is pressed downward by the water pressure to better seal the seal with the base. When the drive rod is separated from the second sealing ring on the second cover body, the water in the pressure-forming cavity is discharged through the second cover body to the water outlet cavity, and the water inlet speed of the water inlet hole is less than the water outlet speed of the pressure relief hole. The pressure of the pressure-forming cavity becomes smaller. At this time, the pressure of the pressure-forming cavity < the pressure of the water inlet cavity, and the pressure-forming seat is pressed upward by the water pressure. At this time, the pressure-forming seat is opened. Moreover, when the water enters from the side and exits from the bottom, in addition to the elastic force sealing of the second elastic body, the frictional force between the drive rod and the second sealing ring on the second cover body can also cause the pressure-forming seat to move downward until it seals with the base. Changing from bottom water inlet and side water outlet to side water inlet and bottom water outlet only requires changing the assembly position relationship of the valve core parts to achieve different functions.

[0062] The cover body 5 located outside the valve body protrudes with a second protruding portion 52, and the second protruding portion 52 is placed in the installation groove 117. The second cover body 5 is located between the external pressure cover 13 and the fixed seat 111 of the valve body 11.

[0063] Please refer to Figure 11 , which is a schematic structural diagram of a control valve device applied to a kitchen faucet. It includes a faucet main body C and a control valve device, and the control valve device controls the water outlet of the faucet main body C.

[0064] Embodiment 2

[0065] Please refer to Figures 12 to 18, the pilot valve A includes a valve body unit 1, a valve core 2 and a drive rod 3. The valve body unit 1 includes a valve body 11, a housing 12 and an outer gland 13. The difference from the first embodiment is that the automatic ballpoint pen mechanism 7 includes an upper ratchet 72, a button housing 75, a lower ratchet 76 and a second elastic body 74; the upper end of the drive rod is installed in the lower ratchet 76, the lower ratchet 76 is connected to the upper ratchet 72, the upper ratchet 72 is connected to the button housing 75, the button housing 75 is connected to the upper section of the housing, and the bottom parts of the upper ratchet 72, the button housing 75 and the lower ratchet 76 are all provided with ratchet teeth and surround the drive rod. Since the bottom parts of the upper ratchet 72, the button housing 75 and the lower ratchet 76 are all provided with ratchet teeth and surround the drive rod, the height of the automatic ballpoint pen mechanism 7 can be shortened; the button housing 75 extends above the housing and forms the button of the automatic ballpoint pen mechanism. The housing 12 is integrally formed with the fixed seat 111 of the valve body 11. Please refer to Figure 19 , Figure 20 and up to Figure 21 , which is a schematic structural diagram of a control valve device applied to a kitchen faucet. It includes a faucet body C and a pilot valve A. The pilot valve A is installed at the water outlet port of the faucet body C and can select bottom inlet side outlet or side inlet bottom outlet as needed.

[0066] As mentioned above, it is only a preferred embodiment of the present invention, so the scope of implementation of the present invention cannot be limited thereby. That is, equivalent changes and modifications made according to the scope of the present invention patent and the content of the specification should still fall within the scope covered by the present invention.

Claims

1. Pilot valve, comprising a valve body unit, a valve core and a drive rod; characterized in that: The valve body unit includes a valve body and two cover bodies. The valve core is slidably disposed in the valve body, and the inner cavity of the valve body is divided into a pressure-forming cavity and a water outlet cavity by the valve core. A seal is installed on the end face of the valve core corresponding to the water outlet cavity. The valve body is provided with two openings communicating with the water outlet cavity. Whether the seal contacts and seals the valve body is controlled by sliding the valve core to control the on-off of the two openings. The inner end of the driving rod is connected to the valve core together to drive the valve core to slide through the driving rod, and the outer end of the driving rod extends out of the valve body. One cover body is sleeved outside the driving rod and located in the pressure-forming cavity, and the other cover body is sleeved outside the driving rod and located outside the valve body. A water hole is formed between each cover body and the driving rod. The two water holes are arranged coaxially along the driving rod, and the positions of the two cover bodies can be interchanged. In the first working mode, the water hole formed by the cover body located in the pressure-forming cavity is a pressure relief hole, and the water hole formed by the cover body located outside the valve body is a water replenishing hole. In the second working mode, the water hole formed by the cover body located in the pressure-forming cavity is a water replenishing hole, and the water hole formed by the cover body located outside the valve body is a pressure relief hole.

2. The pilot valve according to claim 1, characterized in that: The two openings are respectively arranged on the side wall and the bottom wall of the valve body.

3. The pilot valve according to claim 1, wherein: The valve core includes a pressure-forming seat. The seal is installed on the end face of the pressure-forming seat corresponding to the water outlet cavity. A first elastic body is provided between one cover body located in the pressure-forming cavity and the end wall of the valve body corresponding to the pressure-forming cavity.

4. The pilot valve according to claim 1, wherein: A first sealing ring is installed on the outer peripheral wall of the pressure-forming seat, and the first sealing ring is sealingly connected to the inner peripheral wall of the valve body.

5. The pilot valve according to claim 1, characterized in that: The pressure-forming seat is provided with a first through hole penetrating along the sliding direction. The inner end of the driving rod extends out of the first through hole. The first through hole is a stepped hole with a larger upper part and a smaller lower part and includes a large hole section and a small hole section. The cover body located in the pressure-forming cavity protrudes downward with a protruding part, and the protruding part is placed in the large hole section. The cover body located in the pressure-forming cavity supports on the pressure-forming seat.

6. The pilot valve according to claim 5, characterized in that: A groove is recessed on the end wall of the pressure-forming seat facing the pressure-forming cavity. The cover body located in the pressure-forming cavity is partially located in the groove and supports on the bottom of the groove.

7. The pilot valve according to claim 1, characterized in that: An installation groove is recessed on the outer end wall of the valve body. The cover body located outside the valve body protrudes with a protruding part, and the protruding part is placed in the installation groove.

8. The pilot valve according to claim 7, wherein: The valve body unit includes an outer pressure cover. The outer pressure cover is located outside the valve body and is fixedly connected to the valve body relatively. The outer end of the driving rod passes through the outer pressure cover, and the cover body located outside the valve body is located between the outer pressure cover and the valve body.

9. The pilot valve according to claim 8, characterized in that: A pressure relief channel is provided between the outer pressure cover and the valve body. The pressure relief channel is located outside the valve body and communicates with the water hole of the first cover body and the water hole of the second cover body.

10. The pilot valve according to claim 1, characterized in that: The valve body unit is provided with a pressure relief channel. The pressure relief channel is located outside the valve body and communicates with the two water holes.

11. The pilot valve according to claim 2, characterized in that: It is equipped with two kinds of driving rods. Annular notches are recessed on the outer peripheral walls of the two kinds of driving rods. The positions of the annular notches of the two kinds of driving rods are different. The two cover bodies are respectively a first cover body and a second cover body. The annular notch of one kind of driving rod cooperates with the first cover body. The first cover body is installed in the pressure-forming cavity, and the second cover body is located outside the valve body. The annular notch of the other kind of driving rod cooperates with the first cover body. The first cover body is located outside the valve body, and the second cover body is installed in the pressure-forming cavity.

12. The pilot valve according to claim 11, characterized in that: It is also equipped with two second sealing rings. The two kinds of driving rods are respectively a first kind of driving rod and a second kind of driving rod. The annular notch of the first driving rod is matched with the first cover body, the first cover body is installed in the pressure chamber, the second cover body is located outside the valve body, the two second sealing rings are both sleeved on the driving rod, and the second cover body and the first cover body are interposed between the two second sealing rings, the opening on the side wall constitutes a water inlet, and the opening on the bottom wall constitutes a water outlet; The annular notch of the second driving rod cooperates with the first cover body, the first cover body is located outside the valve body, and the second cover body is installed in the pressure chamber. The two second sealing rings are both sleeved on the driving rod and are respectively arranged on both sides of the first cover body. The opening located on the bottom wall constitutes a water inlet, and the opening located on the side wall constitutes a water outlet.

13. The pilot valve according to claim 1, characterized in that: The valve body unit also includes a shell. The valve body and the shell are relatively fixed. The drive rod can slide relative to the shell. An automatic ballpoint pen mechanism is arranged between the drive rod and the shell. The drive rod constitutes the refill of the automatic ballpoint pen mechanism.

14. The pilot valve according to claim 13, characterized in that: The automatic ballpoint pen mechanism includes a ratchet seat, an upper ratchet, an adapter and a second elastic body; a ratchet seat is provided on the inner periphery of the upper section of the shell, the upper ratchet can be slidably connected in the ratchet seat and the upper ratchet and the ratchet seat cooperate, the ratchet seat, the upper ratchet and the outer pressure cover are all provided with ratchets, the drive rod passes through the upper ratchet and the ratchet seat, the adapter is fixed to the upper end of the drive rod, the adapter extends above the ratchet seat and constitutes a button of the automatic ballpoint pen mechanism.

15. The pilot valve according to claim 13, characterized in that: The automatic ballpoint pen mechanism includes an upper ratchet, a button housing, a lower ratchet and a second elastic body; the upper end of the drive rod is installed in the lower ratchet, the lower ratchet is installed in the upper ratchet, the upper ratchet is installed in the button housing, and the button housing is installed in the upper section of the housing; the upper ratchet, button housing, and the bottom end of the lower ratchet are all provided with ratchets and surrounded by the drive rod; the button housing extends above the housing and constitutes a button of the automatic ballpoint pen mechanism.

16. Control valve device, characterized in that: It comprises a pilot valve and an inlet and outlet water assembly according to claim 1, the inlet and outlet water assembly comprising an outer sleeve and a lower connecting part, the outer sleeve can be rotatably sleeved on the valve body, the lower connecting part comprises a stator fixed relative to the valve body and a movable piece rotatable relative to the stator, the outer sleeve is sleeved on the outside of the lower connecting part and transmission-connected to the movable piece, the outer sleeve is provided with a first water port that can be connected to an opening, the stator is provided with a second water port that can be connected to the above-mentioned other opening, and the movable piece is provided with two control ports, which cooperate with the second water port.

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