A high-pressure solenoid valve with signal feedback and a manual-automatic integrated self-locking device

Abstract

The present invention provides a high-pressure solenoid valve with signal feedback and a manual-automatic self-locking device, comprising a valve body, a valve core assembly, an electromagnet and a manual switch, wherein a valve cavity is formed in the valve body, an intermediate flow channel is provided in the valve cavity, and a liquid inlet and a liquid outlet are connected through the intermediate flow channel; the valve core assembly is slidably fitted in the valve core cavity, and an elastic assembly is provided in the valve core cavity to make the valve core assembly have a downward movement tendency and block the outlet end of the intermediate flow channel; the electromagnet is installed at the upper end of the valve body, and is used to drive the valve core assembly to move upward; the manual switch is installed on the side wall of the valve body, and is used to manually move the valve core assembly upward and realize manual opening. The high-pressure solenoid valve with signal feedback and a manual-automatic self-locking device of the present invention has a compact structure, a small size, is safe and reliable, and has a good use effect.

Description

Technical Field

[0001] The present invention relates to a fire-fighting device, and particularly to a high-pressure solenoid valve with signal feedback and a manual-automatic integrated self-locking device. Background Art

[0002] In a fire-extinguishing fire-fighting system, generally, fire extinguishing agents are stored centrally, and a solenoid valve is used to control multiple fire extinguishing points, and the pressure can even reach up to 50 kg. There are two fatal defects in the control solenoid valves on the market at present. First, the pressure is too low, not exceeding 2 kg, and in actual fire extinguishing, the solenoid valve must be started first, and then the fire extinguishing agent bottle valve is started. Once a fire breaks out at one place, the pressure is transmitted to the pipeline. If a second fire extinguishing point appears, the solenoid valve cannot be opened due to the too high system pressure, resulting in serious consequences. Second, since a fire at the scene may cause a power outage, resulting in the solenoid valve losing power and closing, and the fire extinguishing fails. Third, after the solenoid valve is opened, signal transmission is required for system control. Therefore, a high-pressure solenoid valve with signal feedback and a manual-automatic integrated self-locking device is needed to solve this series of problems. Summary of the Invention

[0003] [1] Technical Problems to be Solved

[0004] The technical problem to be solved by the present invention is to provide a high-pressure solenoid valve with signal feedback and a manual-automatic integrated self-locking device that can achieve electric, manual, and automatic opening and has high reliability with signal feedback.

[0005] [2] Technical Solutions for Solving the Problems

[0006] The present invention provides a high-pressure solenoid valve with signal feedback and a manual-automatic integrated self-locking device, which includes:

[0007] A valve body 1, in which a valve cavity is formed. The valve cavity is communicated with a liquid outlet 102 opened on the side wall of the valve body 1. An intermediate flow channel 11 with an upward outlet end is arranged in the valve cavity, and the intermediate flow channel is communicated with a liquid inlet 101 opened on the side wall of the valve body 1. A valve core cavity is opened at the top of the valve cavity;

[0008] A valve core assembly, which is slidably fitted in the valve core cavity. An elastic component is arranged in the valve core cavity to make the valve core assembly have a downward movement tendency and block the outlet end of the intermediate flow channel;

[0009] An electromagnet 8, which is installed at the upper end of the valve body 1 and located outside the valve core assembly, and is used to drive the valve core assembly to move upward and realize the communication between the liquid inlet 101 and the liquid outlet 102;

[0010] A manual switch 22, which is installed on the side wall of the valve body 1 and is used to manually toggle the valve core assembly to move upward and realize manual opening.

[0011] Furthermore, an induction switch is provided at the upper end of the valve core assembly, and when the valve core assembly moves upward and is in an open state, the induction switch is triggered.

[0012] Furthermore, the side wall of the valve body 1 is provided with a self-locking mechanism, and when the valve core assembly moves upward and is in an open state, the self-locking mechanism can lock and fix the valve core assembly.

[0013] Furthermore, the valve core assembly includes a sliding plug 3 and a sliding core assembly 4 that are slidably fitted in the valve core cavity, the sliding plug 3 is located at the lower end of the sliding core assembly 4, and the lower end of the sliding plug 3 is provided with a sealing ring 31 that can fit into the outlet end of the intermediate flow channel and achieve sealing, and the elastic assembly includes a first elastic component that allows the sliding plug 3 to have a downward movement tendency to press the outlet end of the intermediate flow channel, and a second elastic component that allows the sliding core assembly to have a downward movement tendency to press the sliding plug 3.

[0014] Furthermore, a through hole connected to the intermediate flow channel and forming a pressure relief hole 30 is opened in the center of the sliding plug 3, and a sealing gasket that can fit the pressure relief hole 30 and achieve sealing is provided at the lower end of the sliding core assembly 4, and a pressure relief cavity is provided between the sliding core assembly and the inner wall of the valve core cavity.

[0015] Furthermore, the manual switch 22 includes a manual rod 22 rotatably mounted on the side wall of the valve body 1, the rotation axis of the manual rod 22 is perpendicular to and intersects the axis of the valve core assembly, the head of the manual rod 22 extends into the valve core cavity, and a protrusion 223 is eccentrically provided at its end, the side wall of the protrusion 223 can contact the downwardly arranged step surface 4a on the valve core assembly and move the valve core assembly upward, and the tail of the manual rod 22 is provided with a lever 221 for manually rotating the manual rod 22.

[0016] Furthermore, the self-locking mechanism includes a mounting seat 21 fixed to the side wall of the valve body 1, a locking rod 23 slidably fitted in the mounting seat 21, and a reset rod 24 rotatably mounted on the mounting seat 21, the sliding axis of the locking rod 23 is perpendicular to the sliding direction of the valve core assembly, the head of the locking rod 23 can extend into the valve core cavity, and is used to contact with the downwardly arranged step surface 4a on the valve core assembly to block the downward movement path of the valve core assembly, the mounting seat 21 is provided with a third elastic component that makes the locking rod 23 have a movement tendency to approach the valve core cavity, and the side wall of the locking rod 23 is provided with an annular groove; the rotation axis of the reset rod 24 is perpendicular to and intersects with the axis of the locking rod 23, the head of the reset rod is eccentrically provided with a protrusion 242, the protrusion 242 is located in the annular groove and is used to move the locking rod 23 in a direction away from the valve core cavity, and the tail of the reset rod 24 is located outside the mounting seat and serves as an operating end.

[0017] Furthermore, the sliding core assembly 4 includes an upper sliding core 41 and a lower sliding core 43 arranged coaxially. An annular protrusion 432 for contacting with an elastic member is provided on the side wall of the upper sliding core 41 and / or the lower sliding core. A guide hole 430 is formed on the upper end surface of the lower sliding core 43. A guide rod 411 is provided at the lower end of the upper sliding core 41. The guide rod 411 is sleeved in the guide hole and realizes sliding fit. A temperature-controlled locking mechanism connected to the guide rod 411 is provided in the guide hole. When the temperature reaches the threshold value, the temperature-controlled locking mechanism is unlocked and the axial supporting force between the upper sliding core 41 and the lower sliding core 43 is lost. The lower sliding core 43 has an upward movement space and can connect the liquid inlet and the liquid outlet under water pressure.

[0018] Furthermore, the temperature-controlled locking mechanism includes a cylinder block 42 and a lock core assembly. The cylinder block 42 is fixed in the guide hole. A sliding cavity 420 coaxial with the guide hole is formed on the cylinder block 42. A piston is slidably fitted in the sliding cavity and divides the sliding cavity into an upper cavity and a lower cavity. A thermally expandable substance that can expand when heated is filled in the lower cavity. A push rod 421 is fixed on the piston. An inclined guide surface 421a is provided at the top of the push rod. A push rod hole 4111 for the piston rod to be inserted is formed on the guide rod 411. At least three first pin holes 4110 are circumferentially and uniformly distributed on the side wall of the push rod hole 4111. The axis of the first pin hole 4110 is perpendicular to and intersects with the axis of the push rod hole. A second pin hole 4310 coaxial with the first pin hole 4110 is provided on the inner wall of the guide hole. A first pin shaft 441 is slidably fitted in the first pin hole 4110. A first pin shaft 442 and a fourth elastic member are provided in the second pin hole 4310. The fourth elastic member makes the first pin shaft 442 have an inward movement tendency and makes its head insert into the first pin hole 4110 to realize the connection between the guide rod and the guide hole. When heated, the thermally expandable substance expands and pushes the piston and the push rod to move upward, and pushes the first pin shaft to move outward through the inclined guide surface. When the first pin shaft moves to the outer extreme position, the end surface of the first pin shaft is flush with the outer wall of the guide rod 411 and the axial supporting force between the upper sliding core and the lower sliding core is lost.

[0019] Furthermore, a heat conducting sleeve 6 is provided in the valve core cavity. The lower sliding core is slidably fitted in the heat conducting sleeve. A heat conducting ring 7 is provided between the valve body and the electromagnet. A heat conducting adhesive is provided between the inner wall of the heat conducting ring and the outer wall of the heat conducting sleeve.

[0020] Furthermore, the thermally expandable substance is gas or liquid. A spring or another gas for balancing the piston is provided in the upper cavity, and the thermal expansion coefficient of the another gas is smaller than that of the substance in the lower cavity.

[0021] Furthermore, the thermally expandable substance is carbon dioxide.

[0022] Furthermore, a fifth elastic member is provided in the guide hole to give the guide rod an upward movement tendency to reset the upper sliding core and the lower sliding core.

[0023] Furthermore, a positioning portion for radial positioning is provided between the guide rod and the guide hole, and the positioning portion is a strip-shaped groove and a strip-shaped protrusion.

[0024] Furthermore, a cylindrical stop pin 4211 is coaxially fixed to the top surface of the ejector rod. The top of the stop pin is arc-shaped or conical. The inclined guide surface 421a is provided between the lower end of the stop pin 4211 and the ejector rod. When in the locked state, the end of the first pin shaft contacts the stop pin.

[0025] Furthermore, chamfers are provided at the outer end of the first pin shaft and the inner end of the second pin shaft.

[0026] Furthermore, the ejector rod includes a first rod body 421a and a second rod body 421b connected by threads. A gasket 421c is provided between the first rod body and the second rod body and is used to adjust the horizontal height of the inclined guide surface.

[0027] 【3】Advantages

[0028] For the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention, two opening methods, namely coil suction and manual switch, are adopted to make the sliding core move upward, so that the locking rod is stuck on the step surface of the sliding core, so that the valve remains open even when the coil is powered off; in the case of coil failure (no power supply), the normally open state can also be achieved by rotating the manual switch; for the self-locking part, by rotating the reset rod, the action of the locking rod is controlled to indicate the opening and closing of self-locking; the piston and valve core are of a split structure, which can effectively prevent water hammer impact, and at the same time form a pressure internal circulation structure, which is not limited by pressure. Therefore, the spring force is very small, and the structure is compact and the volume is small; during the commissioning process of the fire protection system, the self-locking device can be pre-set to the closed (failed) state, which is convenient for commissioning. After the commissioning is completed, the self-locking device can be adjusted to the open (working) state; at the same time, when power is off and manual opening is impossible, mechanical automatic opening can be achieved, and the use is stable and reliable; the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention has a compact structure, small volume, is safe and reliable, and has good use effects. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0030] Figure 2 is an exploded structural diagram of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0031] Figure 3 Cross-sectional view of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0032] Figure 4 is Figure 3 Enlarged view of part A in

[0033] Figure 5 Another plane cross-sectional view of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0034] Figure 6 is Figure 5 Enlarged view of part B in

[0035] Figure 7 Schematic structural diagram of the reset rod of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0036] Figure 8 Schematic structural diagram of the mounting seat of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0037] Figure 9 Schematic structural diagram of the manual switch of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0038] Figure 10 Schematic structural diagram of the spool assembly of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0039] Figure 11 Exploded structural diagram of the spool assembly of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0040] Figure 12 Cross-sectional view of the spool assembly of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0041] Figure 13 Partial enlarged view of the spool assembly of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0042] Figure 14 is Figure 13 Enlarged view of part C in

[0043] Figure 15 Schematic diagram of the open state of the temperature control locking mechanism of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention;

[0044] Figure 16 is Figure 13 Enlarged view of part D in Detailed implementation manner

[0045] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] Referring to Figures 1 - 16 , the present invention provides a high-pressure solenoid valve with signal feedback and a manual-automatic integrated self-locking device, which includes a valve body 1, a spool assembly, an electromagnet (coil), a manual switch 22, and a self-locking mechanism. Each mechanism will be described in detail below.

[0047] The valve body 1 is integrally in a cuboid structure. A valve cavity is formed inside the valve body 1. The axis of the valve cavity is perpendicular to the horizontal plane. An outlet 102 is provided on the side wall of the valve body. The outlet 102 is communicated with the valve cavity. An intermediate flow channel 11 is provided in the valve cavity. The intermediate flow channel 11 is coaxial with the valve cavity, and its outlet end faces upward. The intermediate flow channel is communicated with an inlet 101 provided on the other side wall of the valve body 1. A spool cavity is opened at the top of the valve cavity. The valve cavity and the spool cavity are coaxial.

[0048] The spool assembly is slidably fitted in the spool cavity. At the same time, an elastic assembly is provided in the spool cavity. The elastic assembly makes the spool assembly have a downward movement tendency to block the outlet end of the intermediate flow channel, thereby controlling the communication or blockage between the inlet and the outlet. In this application, the spool assembly includes a sliding plug 3 and a spool core assembly 4. Both the sliding plug 3 and the spool core assembly 4 are slidably fitted in the spool cavity. Specifically, the spool cavity includes a lower spool cavity and an upper spool cavity arranged coaxially. Among them, the sliding plug 3 is slidably fitted in the lower spool cavity, and the spool core assembly is slidably fitted in the upper spool cavity, that is, the sliding plug 3 is located at the lower end of the spool core assembly 4. A sealing ring 31 (or gasket) is provided at the lower end of the sliding plug 3, and its lower end can fit against the outlet end of the intermediate flow channel, thereby realizing the sealing of the intermediate flow channel 11. It is used to control the communication or blockage (non-communication) between the inlet and the outlet. The elastic assembly includes a first elastic member and a second elastic member, both of which are springs. Among them, the first elastic member makes the sliding plug 3 have a downward movement tendency to press the sealing ring 31 against the outlet end of the intermediate flow channel, and the second elastic member makes the spool core assembly have a downward movement tendency to press the sliding plug 3. The elastic forces generated by the first elastic member and the second elastic member are in the same direction, both towards the intermediate flow channel. In this embodiment, a through hole is penetrated through the center of the sliding plug 3. The through hole is communicated with the intermediate flow channel and forms a pressure relief hole 30. A cylindrical support portion 45 is provided at the lower end of the spool core assembly 4. A gasket is provided at the lower end of the support portion, and it can fit against the pressure relief hole 30 and realize sealing. A pressure relief cavity is provided between the spool core assembly and the inner wall of the spool cavity. Part of the water entering from the inlet can enter the pressure relief cavity through the pressure relief hole, reducing the water pressure at the lower end on the sliding plug 3.

[0049] In the present application, the valve body 1 includes a main valve body and a sub-valve body fixed on the main valve body, wherein the liquid inlet, liquid outlet and valve cavity are opened on the main valve body, the valve core cavity and valve core assembly are arranged on the sub-valve body, and at the same time, the electromagnet 8 is installed at the upper end of the valve body 1, that is, installed at the upper end of the sub-valve body. The electromagnet (coil) is annular and is located on the outside of the valve core assembly. At this time, the sliding core assembly 4 forms an iron core. The electromagnet can make the sliding core assembly 4 have an upward movement tendency through electromagnetic force, and overcome the spring force to make it move upward, and realize the connection between the liquid inlet 101 and the liquid outlet 102, thereby realizing automatic (electric) opening.

[0050] See also Figures 3 - 4 and Figure 9 The manual switch 22 is installed on the side wall of the valve body 1. In the present application, it is installed on the side wall of the auxiliary valve body, and is used to manually move the valve core assembly upward and realize manual opening. Specifically, the manual switch 22 includes a manual rod 22 rotatably installed on the side wall of the valve body 1 (auxiliary valve body), the axis of the manual rod 22 is coaxial with the rotation axis, and its rotation axis is perpendicular to and intersects with the axis of the valve core assembly. The head of the manual rod 22 extends into the valve core cavity, and a protrusion 223 is eccentrically arranged at the end of the head, and the side wall of the protrusion 223 can be aligned with the downwardly arranged protrusion on the valve core assembly. The manual rod 22 is in contact with the stepped surface 4a, and the protrusion 223 can be eccentrically moved up and down by rotating the manual rod. By contacting the stepped surface 4a and moving the valve core assembly (sliding core assembly) upward, a lever 221 is provided at the tail of the manual rod 22. The lever 221 is perpendicular to the axis of the manual rod and can form a force arm for manually rotating the manual rod 22. A limit groove is provided on the side wall of the manual rod 22, and the rotation limit can be achieved when the protrusion is located at the upper limit position and the lower limit position, thereby achieving precise control, realizing manual fast and accurate opening, and improving the operating feel.

[0051] An induction switch is provided at the upper end of the valve core assembly. Specifically, an induction switch is provided at the upper end of the electromagnet, that is, the top of the valve core cavity. A trigger component is fixed on the top of the valve core assembly. When the valve core assembly moves upward and is in an open state, the induction switch can be triggered and an induction signal can be sent out. At the same time, signal feedback can be realized to detect the position state of the valve core assembly.

[0052] A self-locking mechanism is provided on the side wall of the valve body 1. In the present application, it is provided on the auxiliary valve body and is located on the same horizontal plane as the manual switch. When the valve core assembly moves upward and is in an open state, the self-locking mechanism can lock and fix the valve core assembly, thereby keeping the liquid inlet and the liquid outlet in a continuous connection state and keeping the valve body in a continuous open state; see Figures 5 - 8, the self-locking mechanism includes a mounting base 21, a locking rod 23 and a reset rod 24. Among them, the mounting base is fixed on the side wall of the secondary valve body, and it is located on a different side wall from the manual switch. The locking rod 23 is slidably fitted in the mounting base 21, and its sliding axis is perpendicular to and intersects the sliding direction of the spool assembly. The head of the locking rod 23 can extend into the spool cavity and can contact the downward-facing stepped surface 4a on the spool assembly (sliding spool assembly). When the spool assembly moves upward to the open state, the locking rod is radially inserted and contacts the stepped surface to support the sliding spool assembly, thereby blocking the downward movement path of the spool assembly and locking the state of the spool assembly so that it can be in a continuously open state. At the same time, a third elastic member is provided in the mounting base 21, which makes the locking rod 23 tend to move closer to the spool cavity, improving the reliability and stability of self-locking. At the same time, an annular groove is provided on the side wall of the locking rod 23. The reset rod 24 is rotatably mounted on the mounting base 21. The rotation axis of the reset rod 24 is perpendicular to and intersects the axis of the locking rod 23. A protrusion 242 is eccentrically provided at the head of the reset rod. The protrusion 242 is located in the annular groove. By rotating the reset rod, the protrusion can be made to move left and right, thereby used to toggle the locking rod 23 to move in a direction away from the spool cavity, that is, to realize the left and right control of the multi-locking rod, to realize self-locking or release self-locking. The tail of the reset rod 24 is located outside the mounting base and serves as an operating end. In this embodiment, a limiting groove is provided on the side wall of the reset rod, and rotational limiting can be achieved when the convex block is at the inner extreme limit and the outer extreme limit, thereby realizing precise control, realizing manual fast and accurate self-locking or unlocking, and improving the operating feel.

[0053] Refer to Figures 10 - 16 , in this application, the sliding spool assembly 4 includes an upper sliding spool 41 and a lower sliding spool 43 arranged coaxially. An annular protrusion 432 is provided on the side wall of the upper sliding spool 41 or the lower sliding spool for contacting with the elastic member to realize elastic support. A guide hole 430 is opened on the upper end surface of the lower sliding spool 43. The guide hole is coaxial with the lower sliding spool. At the same time, a guide rod 411 is provided at the lower end of the upper sliding spool 41. The guide rod 411 is coaxial with the upper sliding spool. The guide rod 411 is sleeved in the guide hole and realizes sliding fit. At the same time, a mechanical temperature control locking mechanism is provided in the guide hole. The temperature control locking mechanism is connected to the guide rod 411. When the temperature reaches the threshold value, the temperature control locking mechanism can be automatically unlocked, so that the axial support force between the upper sliding spool 41 and the lower sliding spool 43 is lost, and the lower sliding spool 43 has an upward movement space. Under the water pressure, the lower sliding spool can move upward, thereby opening the middle flow channel and connecting the liquid inlet and the liquid outlet to realize automatic opening.

[0054] The temperature-controlled locking mechanism includes a cylinder block 42 and a lock core assembly. The cylinder block 42 is cylindrical as a whole, fixed in a guide hole, supported by a heat-conducting metal material, and a heat-conducting adhesive is provided between the contact surface of the outer wall of the cylinder block and the guide hole. A sliding cavity 420 is formed in the cylinder block 42, which is coaxial with the guide hole. A piston is slidably fitted in the sliding cavity. The piston divides the sliding cavity into an upper cavity and a lower cavity. A thermally expandable substance that can expand when heated is filled in the lower cavity. A push rod 421 is fixed on the piston. The upper end of the push rod passes through the cylinder block and extends outside the cylinder block. A cylindrical stop pin 4211 is coaxially fixed on the top surface of the push rod. The top of the stop pin is arc-shaped or conical. The lower end of the stop pin is connected to the push rod through a conical inclined guide surface 421a, and its inclination angle is 45 - 60 degrees. At the same time, a push rod hole 4111 is formed in the guide rod 411. The piston rod is inserted into the push rod hole 4111. A first pin hole 4110 is formed in the side wall of the push rod hole 4111. The first pin hole 4110 penetrates the guide rod outward. Its axis is perpendicular and intersects the axis of the push rod hole. There are at least three and they are circumferentially evenly distributed. At the same time, a second pin hole 4310 with the same number and one-to-one correspondence (coaxial) as the first pin hole 4110 is provided on the inner wall of the guide hole. A first pin shaft 441 is slidably fitted in the first pin hole 4110. A first pin shaft 442 and a fourth elastic member 443 are provided in the second pin hole 4310. The fourth elastic member 443 makes the first pin shaft 442 have a tendency to move inward and contacts the end of the first pin shaft, so that the end of the first pin shaft contacts the stop pin 4211. At this time, the head of the second pin shaft is inserted into the first pin hole 4110, thereby realizing the connection between the guide rod (upper sliding core) and the guide hole (lower sliding core), that is, the upper sliding core and the lower sliding core form an integral body and can move synchronously. When heated, the thermally expandable substance expands, pushing the piston and the push rod upward, and pushing the first pin shaft outward through the inclined guide surface. When the first pin shaft moves to the outer extreme position, the end face of the first pin shaft is flush with the outer wall of the guide rod 411, so that the axial support force between the upper sliding core and the lower sliding core is lost. At this time, the upper sliding core and the lower sliding core can move relatively. Under the action of the water pressure at the lower end, the lower sliding core is pushed upward, and then the liquid inlet and the liquid outlet are communicated. Chamfers are provided at the outer end of the first pin shaft and the inner end of the second pin shaft, which can compensate for the production errors of the first pin shaft and the second pin shaft. When the outer wall of the guide rod is within the chamfer range of the first stop pin or the second stop pin, automatic opening can be realized, avoiding phenomena such as jamming during opening caused by errors, and greatly improving the use reliability and stability.

[0055] In this application, the push rod includes a first rod body 421a and a second rod body 421b connected by threads. Refer to Figure 16 and a gasket 421c is provided between the first rod body and the second rod body. The gasket is used to adjust the horizontal height of the inclined guide surface, can be quickly adjusted according to the expansion coefficient of the expandable substance in the lower cavity, adapts to different substances, and has a wide application range.

[0056] In order to achieve automatic reset, a fifth elastic member is provided in the guide hole, which gives the guide rod an upward movement tendency, so as to realize the reset of the upper sliding core and the lower sliding core; in order to facilitate quick and accurate assembly, a positioning portion for radial positioning is provided between the guide rod and the guide hole, and the positioning portion is a strip groove and a strip protrusion.

[0057] In this embodiment, the thermal expansion substance is a gas or a liquid. At the same time, a spring or another gas for balancing the piston can be provided in the upper cavity. When it is a gas, the thermal expansion coefficient of the other gas is smaller than that of the substance in the lower cavity. When it is a spring, the upper cavity is provided with an exhaust hole on the side wall to reduce the downward pressure generated on the piston during movement. Preferably, the thermal expansion substance in the lower cavity of this application is carbon dioxide, which has high use safety, a large thermal expansion coefficient, and fast response.

[0058] In order to further improve the response speed and enhance the stability and reliability of automatic opening, in this application, a heat conducting sleeve 6 is provided in the valve core cavity, and the lower sliding core is slidably fitted in the heat conducting sleeve. At the same time, a heat conducting ring 7 is provided between the valve body and the electromagnet. The above-mentioned heat conducting sleeve and heat conducting ring are both made of heat conducting metals such as aluminum and copper, which have fast heat conduction and low cost. At the same time, a heat conducting adhesive is provided between the inner wall of the heat conducting ring and the outer wall of the heat conducting sleeve, which can achieve fast and sufficient heat conduction. When a fire occurs, the external heat can be quickly transferred to the inside to achieve automatic opening.

[0059] The working principle of the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention is described as follows:

[0060] Automatic self-locking working principle: Turn the reset rod 24 to the opening direction. The locking rod 23 abuts against the sliding core assembly under the action of the spring. When the coil is energized, the sliding core assembly (equivalent to the iron core) is attracted upward, the pressure relief hole is opened, and the water in the piston is drained. Because the water inflow is less than the water drainage, a pressure difference is formed between the upper and lower parts of the piston, which pushes the piston upward, and the middle flow channel is opened. At the same time, the locking rod locks the sliding core assembly to keep it always in the normally open state; as the sliding core assembly moves upward, it touches the induction switch and gives a feedback signal.

[0061] Turn the reset rod to the closing direction, the locking rod resets outward, and at the same time, the sliding core assembly and the piston reset downward under the action of the elastic force, and the valve body closes.

[0062] Manual self-locking working principle: Turn the reset rod to the opening direction. The locking rod abuts against the sliding core assembly under the action of the spring. Rotate the manual switch, and the sliding core assembly moves upward under the rotation of the manual switch. The pressure relief port is opened, and the water in the piston is drained. Because the water inflow is less than the water drainage, a pressure difference is formed between the upper and lower parts of the piston, which pushes the piston upward, and the middle flow channel is opened. At the same time, the locking rod locks the sliding core assembly to keep the valve always in the normally open state; as the sliding core assembly moves upward, it touches the induction switch and gives a feedback signal.

[0063] Turn the reset rod in the closing direction to reset the locking rod. Then turn the manual switch to the closed state. Under the action of elastic force, the sliding core assembly and the piston reset downward, and the valve body closes.

[0064] Thermostatic trigger principle: When a fire occurs and the system loses power, the temperature around the valve body rises. The heat is transferred to the lower sliding core through the heat conduction ring and the heat conduction sleeve in sequence. The heat of the lower sliding core is transferred to the cylinder body in the guide hole. The carbon dioxide (thermal expansion substance) in the lower cavity of the cylinder body expands due to heat, pushing the sliding plug upward, causing the ejector rod on the piston to move upward synchronously. The inclined guide surface on the ejector rod pushes the first pin shaft and the second pin shaft outward. When the first pin shaft moves outward to the extreme position, the contact surface between the first pin shaft and the second pin shaft is flush with the outer wall of the guide rod (the contact surface with the inner wall of the guide hole). At this time, the axial support force between the upper sliding core and the lower sliding core is lost, and the two can achieve relative sliding. The sliding core assembly as a whole can shrink, reducing or disappearing the support force on the lower piston. Under the action of the lower water pressure, the piston and the lower sliding core are pushed upward, thereby realizing the automatic opening of the valve body.

[0065] The high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention uses two opening methods, namely coil suction and manual switch, to make the sliding core move upward, and the locking rod is stuck on the step surface of the sliding core, so that the coil remains open even after power-off; in the case of coil failure (no power supply), the normally open state can also be achieved by turning the manual switch; the self-locking part controls the action of the locking rod by turning the reset rod to indicate the opening and closing of self-locking; adopting a split structure of the piston and the valve core can effectively prevent water hammer impact, and at the same time form a pressure internal circulation structure, which is not limited by pressure. Therefore, the spring force is very small, and the structure is compact and small in size; during the debugging process of the fire protection system, the self-locking device can be pre-set to the closed (failed) state, which is convenient for debugging. After the debugging is completed, the self-locking device can be adjusted to the open (working) state; at the same time, when power-off occurs and manual opening is impossible, mechanical automatic opening can be achieved, and the use is stable and reliable; the high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device of the present invention has a compact structure, small size, is safe and reliable, and has good use effects.

[0066] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-pressure solenoid valve with signal feedback and a manual and automatic integrated self-locking device, characterized in that, include: A valve body, wherein a valve cavity is formed in the valve body, the valve cavity is communicated with a liquid outlet provided on a side wall of the valve body, an intermediate flow channel with an outlet end facing upward is provided in the valve cavity, the intermediate flow channel is communicated with a liquid inlet provided on the side wall of the valve body, and a valve core cavity is provided on the top of the valve cavity; A valve core assembly is slidably mounted in the valve core cavity, wherein an elastic assembly is provided in the valve core cavity to make the valve core assembly tend to move downward and block the outlet end of the intermediate flow channel; An electromagnet is installed at the upper end of the valve body and located outside the valve core assembly, and is used to drive the valve core assembly to move upward and achieve communication between the liquid inlet and the liquid outlet; A manual switch, mounted on the side wall of the valve body, for manually moving the valve core assembly upward and realizing manual opening; The valve core assembly includes a sliding plug and a sliding core assembly that are slidably fitted in the valve core cavity. The sliding core assembly includes an upper sliding core and a lower sliding core that are coaxially arranged. The side walls of the upper sliding core and / or the lower sliding core are provided with an annular protrusion for contacting the elastic component. A guide hole is opened on the upper end surface of the lower sliding core. A guide rod is provided at the lower end of the upper sliding core. The guide rod is sleeved in the guide hole and slidably fitted. A temperature control locking mechanism connected to the guide rod is provided in the guide hole. The temperature control locking mechanism includes a cylinder body and a lock core assembly. A piston is slidably fitted in the cylinder body and the cylinder body is divided into an upper chamber and a lower chamber. The lower chamber is filled with gas or The liquid has a thermal expansion material, a push rod is fixed on the piston, a stop pin is fixed on the top surface of the push rod, and the lower end of the stop pin is connected to the push rod through an inclined guide surface; a push rod hole for accommodating the piston rod to be inserted is opened on the guide rod, and the side wall of the push rod hole is evenly distributed with first pin holes in the circumference, and the inner wall of the guide hole is provided with a second pin hole, and the first pin shaft is slidably fitted in the first pin hole, and the second pin shaft and a fourth elastic component are provided in the second pin hole. The fourth elastic component makes the second pin shaft have an inward movement tendency and inserts its head into the first pin hole, thereby realizing the connection between the guide rod and the guide hole.

2. The high-pressure solenoid valve with a signal feedback and a manual-automatic integrated self-locking device according to claim 1, wherein: An induction switch is provided at the upper end of the valve core assembly, and when the valve core assembly moves upward and is in an open state, the induction switch is triggered.

3. The high-pressure solenoid valve with a signal feedback and a manual-automatic integrated self-locking device according to claim 1, characterized in that: The side wall of the valve body is provided with a self-locking mechanism, and when the valve core assembly moves upward and is in an open state, the self-locking mechanism can lock and fix the valve core assembly.

4. The high-pressure solenoid valve with a signal feedback and a manual-automatic integrated self-locking device as claimed in claim 1, wherein: The sliding plug is located at the lower end of the sliding core assembly, and a sealing ring is provided at the lower end of the sliding plug that can fit the outlet end of the intermediate flow channel and achieve sealing. The elastic assembly includes a first elastic component that allows the sliding plug to have a downward movement tendency to press the outlet end of the intermediate flow channel, and a second elastic component that allows the sliding core assembly to have a downward movement tendency to press the sliding plug.

5. The high-pressure solenoid valve with a signal feedback and a manual and automatic integrated self-locking device as claimed in claim 1, wherein: A through hole connected to the middle flow channel and forming a pressure relief hole is opened in the center of the sliding plug, and a sealing gasket that can fit the pressure relief hole and achieve sealing is provided at the lower end of the sliding core assembly, and a pressure relief cavity is provided between the sliding core assembly and the inner wall of the valve core cavity.

6. The high-pressure solenoid valve with a signal feedback and a manual-automatic integrated self-locking device as claimed in claim 1, wherein: The manual switch includes a manual rod rotatably mounted on the side wall of the valve body, the rotation axis of the manual rod is perpendicular to and intersects the axis of the valve core assembly, the head of the manual rod extends into the valve core cavity, and a protrusion is eccentrically arranged at its end, the side wall of the protrusion can contact the downwardly arranged step surface on the valve core assembly and move the valve core assembly upward, and a lever for manually rotating the manual rod is arranged at the tail of the manual rod.

7. The high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device according to claim 1, characterized in that: The self-locking mechanism includes a mounting seat fixed to the side wall of the valve body, a locking rod slidably fitted in the mounting seat, and a reset rod rotatably mounted on the mounting seat, the sliding axis of the locking rod being perpendicular to the sliding direction of the valve core assembly, the head of the locking rod being able to extend into the valve core cavity, and being used to contact with a downwardly arranged step surface on the valve core assembly to block the downward movement path of the valve core assembly, a third elastic component is provided in the mounting seat to cause the locking rod to have a movement tendency toward the valve core cavity, and an annular groove is provided on the side wall of the locking rod; the rotation axis of the reset rod is perpendicular to and intersects with the axis of the locking rod, a protrusion is eccentrically provided on the head of the reset rod, the protrusion is located in the annular groove and is used to move the locking rod in a direction away from the valve core cavity, and the tail of the reset rod is located outside the mounting seat and serves as an operating end.

8. The high-pressure solenoid valve with signal feedback and manual-automatic integrated self-locking device as claimed in claim 1, wherein: When the temperature reaches a threshold value, the temperature control locking mechanism is unlocked and the axial supporting force between the upper sliding core and the lower sliding core is lost. The lower sliding core has an upward movement space and can connect the liquid inlet and the liquid outlet under water pressure.

9. The high-pressure solenoid valve with a signal feedback and a manual-automatic integrated self-locking device as claimed in claim 1, wherein: The temperature control locking mechanism comprises a cylinder body and a lock core assembly, the cylinder body is fixed in the guide hole, a sliding cavity coaxial with the guide hole is formed on the cylinder body, a piston is slidably arranged in the sliding cavity and the sliding cavity is divided into an upper cavity and a lower cavity, the lower cavity is filled with a heat expansion material that can expand due to heat, a push rod is fixed on the piston, and an inclined guide surface is arranged on the top of the push rod; a push rod hole for accommodating the piston rod to be inserted is opened on the guide rod, and at least three first pin holes are evenly distributed on the side wall of the push rod hole in the circumferential direction, the axis of the first pin hole is perpendicular to and intersects with the axis of the push rod hole, and the inner wall of the guide hole is provided with a The second pin hole is coaxial with the first pin hole, and the first pin shaft is slidably provided in the first pin hole, and the second pin shaft and the fourth elastic component are provided in the second pin hole, and the fourth elastic component makes the second pin shaft have an inward movement tendency and inserts its head into the first pin hole, thereby realizing the connection between the guide rod and the guide hole; when heated, the heat expansion material expands and pushes the piston and the push rod to move upward and pushes the first pin shaft to move outward through the inclined guide surface, and when the first pin shaft moves to the outer limit position, the end face of the first pin shaft is flush with the outer wall of the guide rod and causes the axial support force between the upper sliding core and the lower sliding core to be lost.

10. The high-pressure solenoid valve with a signal feedback and a manual and automatic integrated self-locking device according to claim 1, characterized in that: A heat-conducting sleeve is arranged in the valve core cavity, the lower core is slidably fitted in the heat-conducting sleeve, a heat-conducting ring is arranged between the valve body and the electromagnet, and heat-conducting glue is arranged between the inner wall of the heat-conducting ring and the outer wall of the heat-conducting sleeve.

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