Three-way pressure relief valve of wall-mounted boiler water channel device and wall-mounted boiler water channel device thereof

Abstract

The present invention discloses a three-way pressure relief valve of a wall-mounted boiler water channel device and the wall-mounted boiler water channel device thereof, comprising a valve body, a valve core mechanism and a pressure relief structure, the valve core mechanism comprising a heating head and a bathroom head arranged on a driving rod; the pressure relief structure comprises a pressure relief hole arranged on the heating head, and a pressure relief push cover movably sleeved on the driving rod relative to the pressure relief hole, and an elastic limiting assembly arranged on the driving rod, the pressure relief push cover seals against the pressure relief hole under the action of the elastic limiting assembly, when the internal pressure of the heating channel increases to be greater than the biasing force of the elastic limiting assembly, the pressure relief is achieved by pushing open the pressure relief push cover to open the pressure relief hole, the three-way pressure relief valve adopting the technical solution can release the internal pressure of the heating channel, thereby realizing the automatic pressure regulation function, so that the heating head can be opened normally, so as to have good pressure relief effect and good safety in use, thereby improving the use performance and service life of the product.

Description

Technical Field

[0001] The invention relates to the technical field of wall-mounted boilers, and in particular to a three-way pressure relief valve of a wall-mounted boiler water channel device and the wall-mounted boiler water channel device. Background Art

[0002] The water control device of the wall-mounted boiler is used for household heating systems and bathroom hot water. The hot water of the heating system mainly comes from the hot water generated by the heater, while the bathroom hot water used for life uses natural cold water to exchange heat with the hot water in the heating system in a heat exchanger to become bathroom hot water.

[0003] The wall-mounted boiler realizes heat exchange between hot water in the heating system and bathroom water through a water circuit valve device. The water circuit valve device mainly includes a heat exchanger, an inlet valve and an outlet valve. The inlet valve is respectively provided with a bathroom water inlet pipeline and a heating return pipeline. The outlet valve is respectively provided with a heating pipeline, a water inlet pipeline, a bathroom pipeline and a three-way valve, and a water outlet pipe is connected to the heating water outlet of the heating pipeline. The three-way valve is used to switch between the heating pipeline, the water inlet pipeline and the bathroom pipeline, and plays a role in changing the flow direction of the medium. However, during the actual use of the wall-mounted boiler water circuit valve device, the following problems often occur with this three-way valve: when the user is using centralized heating, the wall-mounted boiler needs to close the heating water outlet, which will cause excessive pressure in the heating channel between the heating water outlet and the heating head of the three-way valve. The traditional approach is to connect a pressure relief device to the outside of the heating water outlet, which is more troublesome to install, unreliable in safety, and greatly increases the cost, and is generally rarely adopted; in the above situation, when the heating water outlet needs to be opened to supply water, the heating head at the heating pipeline needs to be opened downward. At this time, the heating head is in a closed state due to the excessive pressure in the channel, resulting in the drive rod of the three-way valve being unable to drive the heating head to move downward under the drive of the motor, resulting in a ticking sound at the contact between the movable core of the three-way valve motor and the three-way rod, posing a major safety hazard. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the heating head of the water channel of the wall-mounted boiler is unable to drive the heating head downward under the drive of the motor due to excessive pressure in the heating channel, causing abnormal noise to be generated at the contact point between the motor and the driving rod, posing a safety hazard.

[0005] In order to solve the above technical problems, the present invention provides a three-way pressure relief valve for a water channel device of a wall-mounted boiler, comprising:

[0006] A valve body, the inner cavity of which includes a heating channel and a bathroom channel, and a water inlet connected between the heating channel and the bathroom channel, wherein the heating channel and the bathroom channel are respectively provided with a first valve port and a second valve port opposite to each other;

[0007] The valve core mechanism comprises a driving rod which can reciprocate and penetrate between the first valve port and the second valve port, and a heating head and a bathroom head which are arranged on the driving rod, and the heating head and the bathroom head are driven by the driving rod to alternately close or open the first valve port and the second valve port;

[0008] The pressure relief structure is arranged between the heating head and the bathroom head, including a pressure relief hole arranged on the heating head, a pressure relief push cover movably mounted on the driving rod relative to the pressure relief hole, and an elastic limiting component arranged on the driving rod and connected to the pressure relief push cover, the pressure relief push cover seals against the pressure relief hole under the biasing force of the elastic limiting component, and is pushed to move away from the heating head when the internal pressure of the heating channel is greater than the biasing force, so as to open the pressure relief hole for pressure relief.

[0009] As a preferred embodiment, the inner cavity of the valve body includes a middle cavity arranged between the first valve port and the second valve port and connected to the water inlet. When the heating head is closed at the first valve port, the heating channel is connected to the middle cavity by opening the pressure relief hole.

[0010] As a preferred solution, the elastic limiting component includes:

[0011] A limit conversion rod is fixedly sleeved on the driving rod and arranged opposite to the heating head, and has a limit groove opening toward the heating head, and the pressure relief push cover can be movably accommodated in the limit groove;

[0012] A first pressure spring is arranged between the limiting groove and the pressure relief push cover, and its bias force drives the pressure relief push cover to resist the outer port of the pressure relief hole, and when the pressure relief push cover is pushed by the internal pressure of the heating channel, it moves toward the inside of the limiting groove and squeezes the first pressure spring.

[0013] As a preferred solution, a limiting step that cooperates with the pressure relief push cover is formed in the limiting groove, one end of the first pressure spring abuts against the limiting groove, and the other end abuts against the concave hole on one side of the pressure relief push cover.

[0014] As a preferred solution, the heating head and the bathroom head are respectively provided with through holes for the driving rod to move through, the through hole provided on the heating head is the pressure relief hole, and a pressure relief gap is left between the driving rod and the pressure relief hole.

[0015] As a preferred solution, a sealing ring sleeved on the driving rod is provided between the pressure relief push cover and the heating head, and the sealing ring cooperates and seals against the outer port of the pressure relief hole under the extrusion of the pressure relief push cover.

[0016] As a preferred embodiment, the valve core mechanism includes a motor device connected to one end of the driving rod, and the motor device drives the driving rod to reciprocate along the axial direction between the first valve port and the second valve port. A shaft sleeve cover suitable for the driving rod to pass through is sealed between the motor device and the bathroom channel, and a shaft sleeve is provided in the shaft sleeve cover for positioning and connecting the driving rod.

[0017] As a preferred solution, the heating head and the bathroom head are respectively accommodated in the heating channel and the bathroom channel, and are respectively provided with sealing flat gaskets which are sealed with the first valve port and the second valve port; a threaded joint through which the other end of the driving rod can pass is installed at the port of the heating channel, and a reset spring sleeved on the driving rod is provided between the threaded joint and the heating head, and the reset spring applies an elastic force to the heating head to move it toward the first valve port.

[0018] As a preferred solution, a second pressure spring is provided between the driving rod and the bathroom head for driving the bathroom head to move toward the second valve port, a positioning clip is fixed on the driving rod and abuts against one end of the second pressure spring, and a recessed hole for installing the other end of the second pressure spring is formed on the side of the bathroom head facing away from the limit conversion rod.

[0019] As a preferred solution, the bathroom head is connected to the heating head through an elastic limit assembly and a pressure relief push cover, and the limit conversion rod includes a limit end extending to one side of the bathroom head, and the bathroom head cooperates and abuts against the limit end under the action of the second pressure spring.

[0020] The present invention further provides a wall-mounted boiler water channel device, comprising the three-way pressure relief valve of any one of the wall-mounted boiler water channel devices described above.

[0021] The technical solution of the present invention has the following advantages compared with the prior art:

[0022] 1. In the three-way pressure relief valve of the wall-mounted boiler water channel device provided by the present invention, when the heating head closes the first valve port under the drive of the driving rod, the bathroom head opens the second valve port, and vice versa, when the heating head opens the first valve port, the bathroom head closes the second valve port, and the two are used alternately and repeatedly. During normal alternating use, the pressure relief push cover is sealed against the pressure relief hole under the action of the elastic limiting component to ensure the sealing effect of the heating head in the closed state. When the internal pressure of the heating channel increases to be greater than the biasing force of the elastic limiting component, the internal pressure of the heating channel drives the pressure relief push cover through the pressure relief hole to move away from the heating head. When the pressure in the heating channel returns to normal, the elastic limit assembly will drive the pressure relief push cover to cover the pressure relief hole again. By adopting the technical scheme, the three-way pressure relief valve can release the internal pressure of the heating channel through the pressure relief structure, thereby realizing the automatic pressure regulation function, so that the heating head can be opened normally to prevent the valve core mechanism and the driving rod from being blocked by excessive pressure and unable to move normally, thereby ensuring that the water in the heating channel can flow normally, with good pressure relief effect, good safety in use, practicality and reliability, and improving the performance and service life of the product.

[0023] 2. In the three-way pressure relief valve of the wall-mounted boiler water channel device provided by the present invention, a pressure relief push cover is movably arranged in the limit groove of the limit conversion rod, and a first pressure spring is arranged between the pressure relief push cover and the limit groove, the biasing pressure of the first pressure spring drives the pressure relief push cover to abut against the heating head, and seals and blocks the pressure relief hole, when the pressure in the heating channel is greater than the biasing pressure of the first pressure spring, the pressure in the heating channel pushes the pressure relief push cover through the pressure relief hole, and the pressure relief push cover moves toward the limit groove due to the pressure pushing action, at this time the pressure relief hole is opened to start the pressure relief work, when the pressure in the heating channel is less than the biasing pressure of the first pressure spring, the pressure relief push cover is acted on by the first pressure spring to close the pressure relief hole, and such operation is repeated, so as to achieve the purpose of automatically adjusting the internal pressure of the heating channel, and the transmission is reliable, safe and reliable.

[0024] 3. In the three-way pressure relief valve of the wall-mounted boiler water channel device provided by the present invention, the driving rod is movable to pass through the pressure relief hole, and a pressure relief gap is left between the driving rod and the pressure relief hole, and the pressure relief push cover is sealed at the outer port of the pressure relief hole by a sealing ring, thereby sealing and blocking the pressure relief gap, thereby ensuring the sealing of the connection between the driving rod and the pressure relief hole.

[0025] 4. In the three-way pressure relief valve of the wall-mounted boiler water channel device provided by the present invention, a return spring sleeved on the driving rod is arranged between the threaded joint and the heating head. The pressure relief push cover maintains a pressing contact with the heating head under the action of the first pressure spring, thereby transmitting motion and force between the driving rod and the heating head. When the driving rod moves downward toward the side of the heating channel under the drive of the motor device, it will drive the pressure relief push cover to push the heating head downward to open the first valve port. At this time, the heating head squeezes the return spring. Therefore, when the force of the motor device disappears, the heating head will reset and move upward under the action of the return spring to close the first valve port, and then drive the driving rod to move upward toward the side of the bathroom channel through the pressure relief push cover. At this time, the bathroom head will open the second valve port, thereby realizing the pipeline switching of the three-way pressure relief valve and changing the flow direction of the medium.

[0026] 5. In the three-way pressure relief valve of the wall-mounted boiler water channel device provided by the present invention, the bathroom head is cooperated and abutted on the limit end under the action of the second pressure spring, and the limit end plays a limiting role on the driving rod, so that both sides of the bathroom head are pressed by the limit conversion rod and the second pressure spring, thereby realizing the linkage cooperation between the bathroom head and the driving rod. Therefore, when the driving rod moves downward or upward, it will synchronously drive the bathroom head to move up or down, so that the bathroom head opens or closes the second valve port, and the second pressure spring can increase the pressure of the bathroom head when closing the second valve port, and the stability is good.

[0027] 6. The wall-mounted boiler water channel device provided by the present invention is provided with the three-way pressure relief valve as described above, and thus naturally has all the advantages brought about by the provision of the above-mentioned three-way pressure relief valve. The three-way pressure relief valve can release the excessive pressure in the heating channel, thereby ensuring the balance of the internal pressure of the heating channel, so that the wall-mounted boiler water channel device can open the heating head normally, realize the automatic pressure relief function, and is safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic plan view of the structure of a three-way pressure relief valve of a water channel device of a wall-mounted boiler of the present invention;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the three-way valve structure of the present invention along line AA;

[0030] Figure 3 for Figure 2 An enlarged structural schematic diagram of the pressure relief structure shown;

[0031] Figure 4 It is a schematic diagram of the installation structure of the heating head and the bathroom head and the driving rod of the present invention;

[0032] Explanation of the reference numerals in the accompanying drawings: 1. valve body; 11. heating channel; 12. bathroom channel; 13. water inlet; 14. first valve port; 15. second valve port; 16. threaded joint; 2. driving rod; 21. heating head; 22. bathroom head; 23. sealing flat gasket; 24. positioning card; 3. pressure relief hole; 4. pressure relief push cover; 5. elastic limit assembly; 5. limit switching rod; 52. limit groove; 53. first pressure spring; 54. limit end; 55. limit step; 6. sealing ring; 7. motor device; 71. shaft sleeve cover; 72. shaft sleeve; 8. reset spring; 9. second pressure spring. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example 1

[0036] This embodiment provides Figure 1-4 A three-way pressure relief valve for a wall-mounted boiler water channel device is shown, comprising:

[0037] The valve body 1 has an inner cavity including a heating channel 11 and a bathroom channel 12, and a water inlet 13 connected between the heating channel and the bathroom channel. The heating channel 11 and the bathroom channel 12 are respectively provided with a first valve port 14 and a second valve port 15 opposite to each other;

[0038] The valve core mechanism includes a driving rod 2 that can reciprocate and penetrate between the first valve port 14 and the second valve port 15, and a heating head 21 and a bathroom head 22 that are arranged on the driving rod 2. The heating head 21 and the bathroom head 22 are driven by the driving rod 2 to alternately close or open the first valve port and the second valve port;

[0039] The pressure relief structure is arranged between the heating head 21 and the bathroom head 22, and includes a pressure relief hole 3 arranged on the heating head 21, and a pressure relief push cover 4 movably mounted on the driving rod relative to the pressure relief hole 3, and an elastic limiting component 5 arranged on the driving rod 2 and connected to the pressure relief push cover 4. The pressure relief push cover 4 seals against the pressure relief hole 3 under the biasing force of the elastic limiting component 4, and is pushed to move away from the heating head when the internal pressure of the heating channel 11 is greater than the biasing force, so as to open the pressure relief hole 3 for pressure relief.

[0040] In the above embodiment, when the heating head 21 closes the first valve port 14 driven by the driving rod 2, the bathroom head 22 opens the second valve port 15. Conversely, when the heating head opens the first valve port, the bathroom head closes the second valve port, and the two are used alternately and repeatedly. During normal alternating use, the pressure relief push cover 4 is sealed against the pressure relief hole 3 under the action of the elastic limiting component 5 to ensure the sealing effect of the heating head in the closed state. When the internal pressure of the heating channel 21 increases to be greater than the biasing force of the elastic limiting component 5, the internal pressure of the heating channel 11 drives the pressure relief push cover 4 away from the pressure relief hole 3 through the pressure relief hole 3. The warm sealing head 21 moves in the direction of the pressure relief operation on the heating channel by opening the pressure relief hole 3. After the internal pressure of the heating channel 11 returns to normal, the elastic limiting component 5 will drive the pressure relief push cover 4 to cover the pressure relief hole 3 again. With the technical solution, the three-way pressure relief valve can release the internal pressure of the heating channel through the pressure relief structure, thereby realizing the automatic pressure regulation function, so that the heating head can be opened normally to prevent the valve core mechanism and the driving rod from being blocked by excessive pressure and unable to move normally, thereby ensuring that the water in the heating channel can flow normally, with good pressure relief effect, good safety in use, practicality and reliability, and improving the performance and service life of the product.

[0041] like Figure 2 As shown, the inner cavity of the valve body 1 includes a middle cavity arranged between the first valve port and the second valve port and connected to the water inlet. When the heating head is closed at the first valve port, the heating channel 11 opens the pressure relief hole to connect to the middle cavity, that is, the heating channel 11 relieves pressure to one side of the middle cavity through the pressure relief hole.

[0042] The following structure Figure 2-4 The specific setting method of the elastic limit assembly is described in detail:

[0043] The elastic limiting assembly 5 includes a limiting conversion rod 51 and a first pressure spring 53, wherein the limiting conversion rod 51 is fixedly sleeved on the driving rod and arranged opposite to the heating head, and has a limiting groove 52 with an opening toward the heating head, and the pressure relief push cover 4 is movably accommodated in the limiting groove 52; the first pressure spring 53 is arranged between the limiting groove and the pressure relief push cover, and its bias force drives the pressure relief push cover 4 to resist at the outer port of the pressure relief hole 3, and when the pressure relief push cover 4 is pushed by the internal pressure of the heating channel 11, it moves toward the inner side of the limiting groove 52 and squeezes the first pressure spring 53. It can be known from the above structure that the pressure relief push cover 4 is pressed against the heating head 21 under the drive of the first pressure spring, and the pressure relief hole 3 is sealed and blocked. When the pressure in the heating channel 11 is greater than the biasing force of the first pressure spring 53, the pressure in the heating channel 11 pushes the pressure relief push cover 4 through the pressure relief hole 3. The pressure relief push cover 4 moves toward the limiting groove under the pressure pushing effect. At this time, the pressure relief hole 3 is opened to start the pressure relief work. When the pressure in the heating channel is less than the biasing force of the first pressure spring, the pressure relief push cover is closed by the first pressure spring. Such repeated operations achieve the purpose of automatically adjusting the internal pressure of the heating channel, and the transmission is reliable and safe.

[0044] As a specific structural setting, a limiting step 55 is formed in the limiting groove 52 and cooperates with the pressure relief push cover 4. One end of the first pressure spring 53 abuts against the limiting groove, and the other end abuts against the concave hole on one side of the pressure relief push cover 4. The limiting step 55 limits the movement of the pressure relief push cover.

[0045] Combination Figure 1-2 As shown, the heating head 21 and the bathroom head 22 are respectively provided with through holes for the driving rod 2 to move through. This design allows the heating head and the bathroom head to move relatively on the driving rod, wherein the through hole provided on the heating head 21 is the pressure relief hole 3, and a pressure relief gap is left between the driving rod 2 and the pressure relief hole 3 to ensure that the heating channel 11 is connected to the middle cavity through the pressure relief gap to achieve normal pressure relief work.

[0046] In order to ensure the sealing performance of the heating seal 21 in the closed state, a sealing ring 6 is provided between the pressure relief push cover 4 and the heating seal 21 and is sleeved on the driving rod. The sealing ring 6 cooperates with the sealing to resist the outer port of the pressure relief hole 3 under the extrusion of the pressure relief push cover, thereby sealing and blocking the pressure relief gap, and ensuring the sealing performance of the connection between the driving rod and the pressure relief hole. When the pressure in the heating channel 21 is greater than the biasing force of the first pressure spring 53, the strong internal pressure will push the sealing ring 6 and the pressure relief push cover 4 to move a certain distance into the limiting groove through the pressure relief hole, thereby opening the pressure relief hole to release the excessive pressure in the heating channel.

[0047] In this embodiment, if Figure 2 As shown, the valve core mechanism includes a motor device 7 connected to one end of the drive rod, and the motor device 7 drives the drive rod 2 to reciprocate along the axial direction between the first valve port 14 and the second valve port 15. As for the transmission mode between the motor device and the drive rod, there are various forms. The motor device can be selected to be reduced by gears or worm gears, and the rotational motion of the motor can be converted into the linear motion of the drive rod through the cooperation of the screw nut and the drive rod. According to the connection of the motor device 7 to the bathroom passage, a sleeve cover 71 suitable for the drive rod 2 to pass through is sealed and installed between the motor device 7 and the bathroom passage 12. A sleeve 72 for positioning and connecting the drive rod is provided in the sleeve cover. The sleeve can play a limiting and guiding role on one end of the drive rod to ensure the smoothness and reliability of the movement of the drive rod.

[0048] As a preferred embodiment, the heating head 21 and the bathroom head 22 are respectively accommodated in the heating channel 11 and the bathroom channel 12, and are respectively provided with sealing flat gaskets 23 that are sealed and connected to the first valve port and the second valve port. The heating head and the bathroom head are respectively abutted against the ports of the first valve port and the second valve port through the sealing flat gaskets 23 to ensure the sealing of the connection between the two. A threaded joint 16 is installed at the port of the heating channel 11 for the other end of the driving rod to pass through, that is, an axial hole opposite to the shaft sleeve is provided on the threaded joint 16, thereby playing a limiting and guiding role for the other end of the driving rod 2 to prevent the driving rod from deflecting and shaking during movement.

[0049] Combine the following Figure 2-4 The specific setting method between the heating head and the driving rod is explained in detail:

[0050] A return spring 8 sleeved on the drive rod is provided between the threaded joint 16 and the heating head 21, and the return spring 8 applies an elastic force to the heating head 21 to move toward the first valve port. With this structural arrangement, the pressure relief push cover 4 maintains a pressing contact with the heating head 21 under the action of the first pressure spring 53, thereby transmitting motion and force between the drive rod 2 and the heating head 21. When the drive rod 2 moves downward toward one side of the heating channel under the drive of the motor device, the limit conversion rod 51 follows the drive rod in the downward process through the first pressure spring 53 applies an extrusion force to the pressure relief push cover 4, so that the pressure relief push cover 4 pushes the heating head 21 downward to open the first valve port 14. At this time, the heating head squeezes the reset spring 8. Therefore, when the force of the motor device disappears, the heating head 21 will reset and move upward under the action of the reset spring 8 to close the first valve port 14, and then drive the driving rod 2 to move upward toward the side of the bathroom channel through the pressure relief push cover 4. At this time, the bathroom head 22 will open the second valve port 15, thereby realizing the pipeline switching of the three-way pressure relief valve, which plays a role in changing the flow direction of the medium.

[0051] Combine the following Figure 2-4 The specific setting method between the bathroom head and the driving rod is explained in detail:

[0052] A second pressure spring 9 for driving the bathroom head to move toward the second valve port is provided between the driving rod 2 and the bathroom head. A positioning clamp 24 is fixedly provided on the driving rod 2 to abut and limit one end of the second pressure spring. A concave hole for installing the other end of the second pressure spring is formed on the side of the bathroom head facing away from the limit conversion rod. The second pressure spring 9 is limited and installed through the cooperation between the positioning clamp 24 and the concave hole. It is further preferably arranged that the limit conversion rod 51 and the pressure relief push cover 4 are cooperated and connected between the heating head 21 and the bathroom head 22. The limit conversion rod 51 includes a limit end 54 extending to one side of the bathroom head. The bathroom head 22 is in the second pressure Under the action of the spring 9, it cooperates to abut against the limit end 54, and the pressure relief push cover 4 cooperates to abut against the heating head 21 under the action of the first pressure spring 53. According to the above structure, the limit end 54 plays a limiting role on the driving rod of the bathroom head. This design makes the two sides of the bathroom head respectively subject to the pressure of the limit conversion rod and the second pressure spring, thereby realizing the linkage cooperation between the bathroom head 22 and the driving rod 2. Therefore, when the driving rod 2 moves downward or upward, it will synchronously drive the bathroom head 22 to move up or down, so that the bathroom head 22 opens or closes the second valve port 15, and the second pressure spring can increase the pressure of the bathroom head when closing the second valve port, and the stability is good.

[0053] The following combination Figure 2-4 The working principle of the three-way pressure relief valve is described as follows:

[0054] When the heating channel needs to be opened, the motor device 7 drives the driving rod 2 to start downward movement, and the pressure relief push cover 4 abuts against the heating head 21 under the action of the first pressure spring, and the heating head 21 is pushed downward by the pressure relief push cover 4 to open the first valve port 14. At the same time, the bathroom head 22 closes the second valve port 15 when the driving rod 2 moves downward, thereby realizing the connection between the water inlet and the heating channel;

[0055] When it is necessary to open the bathroom passage, the motor device 7 stops working, and the heating head 21 and the driving rod 2 start to move upward under the action of the reset spring 8 until the heating head 21 closes the first valve port. At the same time, the bathroom head 22 opens the second valve port as the driving rod moves upward, thereby realizing the connection between the water inlet and the bathroom.

[0056] Example 2

[0057] This embodiment provides a wall-mounted boiler water channel device, such as Figure 1-2 As shown, the three-way pressure relief valve of the wall-mounted boiler water channel device described in Example 1 can release the excessive pressure in the heating channel through the three-way pressure relief valve, ensure the balance of pressure inside the heating channel, and enable the wall-mounted boiler water channel device to open the heating head normally, realize the automatic pressure relief function, and be safe and reliable to use.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A three-way pressure relief valve for a wall-mounted boiler water channel device, characterized in that: include: A valve body (1), the inner cavity of which comprises a heating channel (11) and a bathroom channel (12), and a water inlet (13) connected between the heating channel and the bathroom channel, wherein the heating channel (11) and the bathroom channel (12) are respectively provided with a first valve port (14) and a second valve port (15) opposite to each other; The valve core mechanism comprises a driving rod (2) which is reciprocatably arranged between the first valve port (14) and the second valve port (15), and a heating sealing head (21) and a bathroom sealing head (22) arranged on the driving rod (2), wherein the heating sealing head and the bathroom sealing head are driven by the driving rod (2) to alternately close or open the first valve port and the second valve port; A pressure relief structure is arranged between the heating sealing head (21) and the bathroom sealing head (22), comprising a pressure relief hole (3) arranged on the heating sealing head (21), and a pressure relief push cover (4) movably sleeved on the driving rod (2) relative to the pressure relief hole, and an elastic limiting component (5) arranged on the driving rod (2) and connected to the pressure relief push cover, wherein the pressure relief push cover (4) seals against the pressure relief hole (3) under the biasing force of the elastic limiting component (5), and is pushed to move away from the heating sealing head when the internal pressure of the heating channel (11) is greater than the biasing force, so as to open the pressure relief hole (3) for pressure relief; The inner cavity of the valve body (1) comprises a middle cavity which is arranged between the first valve port (14) and the second valve port (15) and is connected to the water inlet (13); when the heating sealing head (21) is closed at the first valve port, the heating channel (11) is connected to the middle cavity by opening the pressure relief hole (3); The elastic limiting component (5) comprises: A limit conversion rod (51) is fixedly sleeved on the driving rod (2) and arranged opposite to the heating sealing head (21), and has a limit groove (52) opening toward the heating sealing head, and the pressure relief push cover (4) can be movably accommodated in the limit groove (52); A first pressure spring (53) is arranged between the limiting groove (52) and the pressure relief push cover (4), and its biasing force drives the pressure relief push cover (4) to resist the outer port of the pressure relief hole (3), and when the pressure relief push cover (4) is pushed by the internal pressure of the heating channel, it moves toward the inside of the limiting groove (52) and squeezes the first pressure spring (53).

2. The three-way pressure relief valve of the wall-mounted boiler water channel device according to claim 1, characterized in that: A limiting step (55) is formed in the limiting groove (52) and is matched with the pressure relief push cover. One end of the first pressure spring (53) abuts against the limiting groove, and the other end abuts against the concave hole on one side of the pressure relief push cover (4).

3. The three-way pressure relief valve of the wall-mounted boiler water channel device according to claim 2, characterized in that: The heating sealing head (21) and the bathroom sealing head (22) are respectively provided with through holes for the driving rod to move through, the through hole provided on the heating sealing head (21) is the pressure relief hole (3), and a pressure relief gap is left between the driving rod (2) and the pressure relief hole (3).

4. The three-way pressure relief valve of the wall-mounted boiler water channel device according to claim 1 is characterized in that: A sealing ring (6) sleeved on the driving rod is provided between the pressure relief push cover (4) and the heating sealing head (21); the sealing ring (6) cooperates and seals against the outer port of the pressure relief hole (3) under the pressure of the pressure relief push cover (4).

5. The three-way pressure relief valve of the wall-mounted boiler water channel device according to any one of claims 1 to 4, characterized in that: The valve core mechanism comprises a motor device (7) connected to one end of the driving rod, the motor device (7) drives the driving rod (2) to move back and forth along the axial direction between the first valve port and the second valve port, and a shaft sleeve cover (71) suitable for the driving rod to pass through is sealedly installed between the motor device (7) and the bathroom passage (12), and a shaft sleeve (72) for positioning and connecting the driving rod is provided in the shaft sleeve cover.

6. The three-way pressure relief valve of the wall-mounted boiler water channel device according to claim 5, characterized in that: The heating sealing head (21) and the bathroom sealing head (22) are respectively accommodated in the heating channel (11) and the bathroom channel (12), and are respectively provided with sealing flat gaskets (23) which are sealedly connected to the first valve port and the second valve port; a threaded joint (16) is installed at the end of the heating channel (11) for the other end of the driving rod to pass through, and a return spring (8) sleeved on the driving rod is provided between the threaded joint (16) and the heating sealing head (21), and the return spring (8) applies an elastic force to the heating sealing head (21) to move it in a direction close to the first valve port (14).

7. The three-way pressure relief valve of the wall-mounted boiler water channel device according to claim 6, characterized in that: A second pressure spring (9) for driving the bathroom closure (22) to move toward the second valve port is provided between the driving rod (2) and the bathroom closure (22); a positioning clamp (24) abutting against one end of the second pressure spring is fixedly provided on the driving rod (2); and a concave hole for mounting the other end of the second pressure spring is formed on the side of the bathroom closure (22) facing away from the limit conversion rod (51).

8. The three-way pressure relief valve of the wall-mounted boiler water channel device according to claim 7, characterized in that: The limit conversion rod (51) and the pressure relief push cover (4) are cooperatively connected between the heating head and the bathroom head. The limit conversion rod (51) includes a limit end (54) extending toward one side of the bathroom head. The bathroom head (22) cooperates with and abuts against the limit end (54) under the action of the second pressure spring (9).

9. A water channel device for a wall-mounted boiler, characterized in that: A three-way pressure relief valve comprising the water channel device of a wall-mounted boiler according to any one of claims 1-8.

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