Heating main pipeline and heating tail end conversion device

Abstract

A heating main pipeline and heating tail end conversion device comprises a water supply static valve, a water return static valve, a water supply movable valve, a water return movable valve and a fixing block, the fixing block comprises a power supply fixing hole, a power supply pipe hole, a return fixing hole and a return pipe hole, and the power supply fixing hole and the power supply pipe hole are communicated and located on the same straight line. The reversing fixing hole and the reversing pipe hole are communicated and located on the same straight line. The water supply static valve and the water return static valve are arranged left and right; the power supply valve body is fixed with the power supply fixing hole, the reversing valve body is fixed with the reversing fixing hole, and the reversing pipe body is in sliding fit with the reversing pipe hole; the power supply valve body and the return valve body are in inserted connection and sliding fit with the static valve element cavity and the return static valve element cavity respectively and are in contact fit with the switching valve element and the return switching valve element, and the dynamic elastic plate is in sliding fit with the axial guide groove and is matched with the rear locking groove. The water supply movable valve and the water return movable valve move relative to the water supply static valve and the water return static valve in a reciprocating mode, state switching is achieved, and operation is convenient.

Description

Technical Field

[0001] The invention relates to an air energy heat pump system, in particular to a connecting device of a main pipeline and a cooling and heating terminal. Background Art

[0002] In the current existing technology, the water inlet and outlet of the cold and heating terminals are connected to the main pipeline, and a main stop valve is provided on the main pipeline between the water outlet and the water inlet, and the water outlet and the water inlet are respectively provided with an inlet stop valve and an outlet stop valve; when the terminal stops using, it is necessary to open the main stop valve, and then close the inlet stop valve and the outlet stop valve respectively; when the terminal is switched to use, the main stop valve is cut off, and the inlet stop valve and the outlet stop valve are opened; the state conversion process is complicated. Summary of the invention

[0003] The purpose of the present invention is to provide a heating main line and a heating terminal conversion device, which has the characteristics of convenient terminal use and stop conversion.

[0004] The present invention is implemented as follows: a heating main line and a heating terminal conversion device, which is special in that it includes a water supply static valve, a return water static valve, a water supply dynamic valve, a return water dynamic valve and a fixed block,

[0005] The water supply static valve includes a water supply static valve body, a water supply static spring and a water supply switching valve core.

[0006] The water supply static valve body includes a static valve core cavity, a static valve stem and a static valve core, a water supply interface and a water supply outlet interface. The static valve core cavity includes a guide limit cavity arranged on one side, two axial grooves opposite to each other up and down, and an axial guide groove arranged on the upper part of the other side. The axial groove is connected with the circumferential ends of the guide limit cavity, and the axial guide groove is provided with a front locking groove and a rear locking groove arranged in front and behind. The switching valve core includes a cylindrical body, a water inlet hole and a limit frame arranged on one side of the cylindrical body, and a static elastic plate arranged on the other side. and a water outlet valve core cavity arranged in the water outlet end; the static spring is arranged in the static valve core cavity, the cylindrical body is arranged in the static valve core cavity and cooperates with the static spring, the limit frame slides with the guide limit cavity, and the axial part of the limit frame slides with the axial groove; the static valve core slides with the water outlet valve core cavity; the static elastic plate slides with the axial guide groove and locks with the front locking groove or the rear locking groove; in the straight-through state, the water supply interface and the water outlet interface are connected, and in the circulation state, the supply switching valve core closes the water outlet interface;

[0007] The return static valve includes a return static valve body, a return static spring and a return switching valve core. The return static valve body includes a return static valve core cavity, a return static valve stem and a return static valve core, a return water inlet interface and a return water outlet interface. The return static valve core cavity and the return switching valve core have the same and symmetrical structures as the supply static valve core cavity and the supply switching valve core.

[0008] The water supply actuator comprises an actuator valve body, an actuator valve core and an actuator spring. The actuator valve body comprises an actuator valve core cavity, an actuator valve core seat, an annular groove arranged in the other end, an annular driving plate arranged at one axial end of the annular groove, a countersunk hole and an actuator elastic plate; the actuator valve core comprises an actuator cylinder, an actuator valve stem and an actuator valve core plug, an annular spring cavity and an actuator tube body; the actuator spring is arranged in the annular spring cavity, the actuator cylinder is slidably matched with the actuator valve core cavity, the actuator valve core plug is matched with the water guide hole of the actuator valve core seat, the annular driving plate extends into the annular spring cavity and is driven and matched with one end of the water supply spring; the actuator tube body is slidably matched with the countersunk hole;

[0009] The return water valve comprises a return valve body, a return valve core and a return spring. The return valve body and the supply valve body have the same structure and the dynamic elastic plates are symmetrical; the return valve core and the supply valve core have the same structure;

[0010] The fixed block includes a supply fixing hole and a supply pipe hole and a return fixing hole and a return pipe hole, the supply fixing hole and the supply pipe hole are connected and are in a straight line, and the return fixing hole and the return pipe hole are connected and are in a straight line;

[0011] The water supply static valve and the water return static valve are arranged on the left and right, and the water outlet interface and the water return inlet interface are connected; the supply moving valve body is fixed to the supply moving fixing hole, the supply moving pipe body is slidingly matched with the supply moving pipe hole, the return valve body is fixed to the return fixing hole, and the return pipe body is slidingly matched with the return pipe hole; the supply moving valve body and the return valve body are respectively plugged into and slidingly matched with the supply static valve core cavity and the return static valve core cavity, and are in contact and matched with the supply switching valve core and the return switching valve core, and the dynamic elastic plate is slidingly matched with the axial guide groove and matched with the rear locking groove.

[0012] The heating main line and heating terminal conversion device described above are special in that: the supply switching valve core and the return switching valve core are provided with a core axial groove adjacent to the axial part of the limit frame;

[0013] The static supply valve core cavity and the static return core cavity are provided with axial protrusions, and the axial protrusions are slidably matched with the core axial grooves.

[0014] The heating main line and the heating terminal conversion device are special in that: the supply-static valve core cavity is provided with a front radial guide hole and a rear radial guide hole communicating with the front locking groove and the rear locking groove, and the return-static core cavity is provided with a front radial guide hole and a rear radial guide hole communicating with the front locking groove and the rear locking groove;

[0015] It also includes a housing, a driving member, a front driven driving plate, a rear driven driving plate and a spring,

[0016] The housing is provided with front and rear guide holes, a front transmission hole and a rear transmission hole with a front opening, and the front and rear guide holes include a square hole and two inclined hole portions distributed in a trapezoidal shape, and the inclined hole portions are connected with the front transmission hole and the rear transmission hole;

[0017] The driving member comprises a square body, a front driving plate and a rear driving plate arranged on both sides of the lower part of the square body, and a spring cavity provided with a rear part and passing through the rear driving plate;

[0018] The front transmission hole and the rear transmission hole are respectively opposite to the front radial guide hole and the rear radial guide hole, the front driven drive plate and the rear driven drive plate extend into the front radial guide hole and the rear radial guide hole through the front transmission hole and the rear transmission hole, and cooperate with the cylindrical body and the static elastic plate of the supply switching valve core, the supply valve body and the dynamic elastic plate; the shell is fixed to the water supply static valve body and the return water static valve body, the square body part slides with the square hole and extends out, and the front drive plate and the rear drive plate slide with the inclined hole part; the spring is arranged in the spring cavity 7, one end cooperates with the closed end of the spring cavity, and the other end cooperates with the closed end of the inclined hole part, the front driven drive plate and the rear driven drive plate extend into the inclined hole part through the front transmission hole and the rear transmission hole respectively, and the front drive plate and the rear drive plate cooperate with the front driven drive plate and the rear driven drive plate respectively.

[0019] The present invention provides a heating main line and a heating terminal conversion device. Due to the use of such a structure, the water supply dynamic valve and the water return dynamic valve move back and forth relative to the water supply static valve and the water return static valve to achieve state conversion, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is one of the cross-sectional views of the present invention.

[0021] Figure 2 It is a planar exploded view of the present invention.

[0022] Figure 3 It is the second sectional view of the present invention.

[0023] Figure 4 It is the third sectional view of the present invention.

[0024] Figure 5 It is four of the cross-sectional views of the present invention.

[0025] Figure 6 It is a three-dimensional exploded view of the static valve assembly of the present invention.

[0026] Figure 7 It is a cross-sectional view of the water supply static valve body of the present invention.

[0027] Figure 8 It is one of the three-dimensional cross-sectional views of the water supply static valve body of the present invention.

[0028] Fig. 9 This is the second stereoscopic cross-sectional view of the water supply static valve body of the present invention.

[0029] Fig.10 It is one of the three-dimensional views of the switch valve core of the present invention.

[0030] Fig.11This is the second stereoscopic view of the switch valve core of the present invention.

[0031] Fig.12 It is a three-dimensional cross-sectional view of the movable valve assembly of the present invention.

[0032] Fig.13 It is a three-dimensional view of the movable valve assembly of the present invention.

[0033] Fig.14 It is one of the three-dimensional exploded views of the present invention.

[0034] Fig.15 It is a three-dimensional view of the driving member of the present invention.

[0035] Fig.16 It is the second of the three-dimensional exploded diagrams of the present invention.

[0036] Fig.17 It is three-dimensional exploded view of the present invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] 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 direct connection, or an indirect connection 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.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, a heating main line and a heating terminal conversion device comprises a water supply static valve 1, a water return static valve 2, a water supply dynamic valve 3, a water return dynamic valve 4 and a fixing block 5.

[0040] The water supply static valve 1 comprises a water supply static valve body 11, a water supply static spring 12 and a water supply switching valve core 13.

[0041] The water supply static valve body 11 includes a static valve core cavity 111, a static valve stem 112, a static valve core 113, a water supply interface 114 and a water supply outlet interface 115. One end of the static valve stem 112 is connected to the bottom of the static valve core cavity 111, and the other end is connected to the static valve core 113. The water supply static valve body 11 is formed in one step.

[0042] like Figure 8 , Fig. 9 As shown, the static valve core cavity 111 includes an arc-shaped guide limit cavity 1111 arranged on one side, two axial grooves 1112 opposite to each other up and down, and an axial guide groove 1113 arranged on the upper part of the other side, the axial groove 1112 is connected with the circumferential ends of the guide limit cavity 1111, and the axial guide groove 1113 is provided with a front locking groove 1114 and a rear locking groove 1115 arranged front and back; the guide limit cavity 1111 and the water supply interface 114 are arranged on the same side;

[0043] like Fig.10 , Fig.11 As shown, the switching valve core 13 includes a cylindrical body 131, a water inlet hole 132 provided on one side of the cylindrical body 131 and a limit frame 133 with an opening at one end, a static elastic plate 134 provided on the other side and a water outlet valve core cavity 135 provided in the water outlet end, the water inlet hole 132 is in an arc shape, the limit frame 133 includes a circumferential portion and axial portions located at both ends of the circumferential portion; the limit frame 133 surrounds the water inlet hole 132, and the circumferential portion is located at the axial inner end of the water inlet hole 132; the static elastic plate 134 is in a straight line and inclined in this embodiment; it can also be in an inverted "U" shape to utilize its elasticity;

[0044] The static spring 12 is arranged in the bottom of the static valve core cavity 111, the cylindrical body 131 is arranged in the static valve core cavity 111 and cooperates with the static spring 12, the cylindrical body 131 slides with the static valve core cavity 111, the limit frame 133 slides with the guide limit cavity 1111, the axial part of the limit frame 133 slides with the axial groove 1112, and the circumferential part stops with one end of the guide limit cavity 1111; the static valve core 113 slides with the outlet valve core cavity 135; the static elastic plate 134 slides with the axial guide groove and is locked with the front locking groove or the rear locking groove; Figure 1 As shown, in the straight-through state, the water supply interface 114 and the water outlet interface 115 are connected, the static elastic plate 134 and the front locking groove 1114 are engaged, the static valve core 113 and the water outlet valve core cavity 135 are engaged and sealed, and the static spring 12 is in an extended state; Figure 3 As shown, in the circulation state, the switching valve core 13 closes the water outlet interface 115, the water inlet hole 132 and the water supply interface 114 are opposite; the static elastic plate 134 and the rear locking groove 1115 are engaged, and the static valve core 113 leaves the water outlet valve core cavity 135; the return spring 22 is in a compressed state;

[0045] The return static valve 2 includes a return static valve body 21, a return static spring 22 and a return switching valve core 23. The return static valve body 21 includes a return static valve core cavity 211, a return static valve stem 212 and a return static valve core 213, a return water inlet interface 214 and a return water outlet interface 215. The return static valve core cavity 211 and the return switching valve core 23 have the same and symmetrical structures as the supply static valve core cavity 111 and the supply switching valve core 13. In the circulation state, the return switching valve core 23 closes the return water inlet interface 214, such as Figure 3 As shown; the return water static valve and the water supply static valve operate in the same way;

[0046] The water supply valve 3 includes a supply valve body 31, a supply valve core 32 and a supply spring 33.

[0047] The supply valve body 31 includes a supply valve core chamber 311, a supply valve core seat 312, an annular groove 313 provided in the other end, an annular driving plate 314 provided at one axial end of the annular groove, a counterbore 315 and a dynamic elastic plate 316;

[0048] The moving valve core 32 includes a moving cylinder 321, a moving valve stem 322, a moving valve core plug 323, an annular spring chamber 324 and a moving tube body 325.

[0049] The supply spring 33 is arranged in the annular spring cavity 324, the supply cylinder 321 is slidably matched with the supply valve core cavity 311, the supply valve core plug 323 is matched with the water guide hole of the supply valve core seat 312, and the annular driving plate 314 extends into the annular spring cavity 324 and drives and cooperates with one end of the supply spring 33; the supply pipe body 325 is slidably matched with the counterbore 315; the supply valve core 32 drives the supply spring 33;

[0050] The return water valve 4 includes a return valve body 41, a return valve core 42 and a return spring 43. The return valve body and the supply valve body 31 have the same structure and the dynamic elastic plate 316 is symmetrical; the return valve core and the supply valve core 32 have the same structure; the dynamic elastic plate 316 is straight and inclined in this embodiment; it can also be in an inverted "U" shape;

[0051] The fixed block 5 includes a supply fixing hole 51 and a supply pipe hole 52 and a return fixing hole (not marked) and a return pipe hole. The supply fixing hole 51 and the supply pipe hole 52 are connected and on a straight line, and the return fixing hole and the return pipe hole are connected and on a straight line.

[0052] like Figure 1 As shown, the water supply static valve 1 and the water return static valve 2 are arranged on the left and right, and the water outlet interface 115 and the water return inlet interface 214 are connected; the supply moving valve body 31 is fixed to the supply moving fixing hole 51, the supply moving pipe body 315 is slidably matched with the supply moving pipe hole 52, the return valve body is fixed to the return fixing hole, and the return pipe body is slidably matched with the return pipe hole; the supply moving valve body 31 and the return valve body 41 are respectively plugged and slidably matched with the supply static valve core cavity 111 and the return static valve core cavity 211, and are in contact with the supply switching valve core 13 and the return switching valve core 23, and the dynamic elastic plate 316 is slidably matched with the axial guide groove and matched with the front locking groove;

[0053] like Figure 1 , Fig.16As shown, in the straight-through state, the dynamic elastic plate 316 is engaged with the axial guide groove 1113 at the front of the front locking groove; when it is necessary to switch to the circulation state, the fixed block 5 is held, and the supply valve body 31 of the water supply dynamic valve 3 and the return valve body 41 of the return water dynamic valve 4 respectively drive the supply switching valve core 13 and the return switching valve core 23 to move, and at the same time, the static valve core 113 and the supply valve core plug 323 move into the supply valve body 31; until the water inlet hole 132 and the water supply interface 114 are connected, the supply switching valve core 13 closes the water supply and outlet interface 115, the static elastic plate 134 is engaged with the rear locking groove 1115, the dynamic elastic plate 316 is engaged with the front locking groove 11141, and the return switching valve core 23 closes the return water inlet interface 214; as shown in FIG. Figure 3 The state is shown; the action mode of the return water static valve 2 and the return water dynamic valve 4 is the same as the action mode of the supply water static valve 1 and the supply water dynamic valve 3;

[0054] At this time, water enters the water inlet end of the heating terminal through the water supply interface 114, the supply switching valve core 13, the water outlet valve core cavity 135, the water guide hole of the supply valve core seat 312, the supply valve core 32, the supply cylinder part 321, and the supply pipe body 325;

[0055] At the outlet end of the heating end, the return water dynamic valve 4 flows out through the return water interface 215 of the return water static valve 2. With such a structure, when the state is switched, only the fixed block needs to be held, and the water supply dynamic valve 3 and the return water dynamic valve 4 can be moved forward and backward.

[0056] As a further improvement of the present invention: the supply switching valve core 13 and the return switching valve core 23 are provided with a core axial groove 136 adjacent to the axial portion of the limit frame 133;

[0057] The supply static valve core cavity 111 is provided with an axial protrusion 1116, and the return static valve core cavity is provided with an axial protrusion. The axial protrusion 1116 and the core axial groove 136 are slidably matched.

[0058] As a further improvement of the present invention: the supply valve core chamber 111 is provided with a front radial guide hole 11141 and a rear radial guide hole 11151 communicating with the front locking groove 1114 and the rear locking groove 1115, and the return valve core chamber 211 is provided with a front radial guide hole and a rear radial guide hole communicating with the front locking groove and the rear locking groove;

[0059] It also includes a housing 6, a driving member 7, a front driven driving plate 81, a rear driven driving plate 82 and a spring 9.

[0060] The housing 6 is provided with a front and rear guide hole 61, a front transmission hole 621 and a rear transmission hole 622 with a front opening, and the front and rear guide holes include a square hole 611 and two inclined hole portions 612 distributed in a trapezoidal shape, and the inclined hole portions 612 are connected to the front transmission hole 621 and the rear transmission hole 622;

[0061] The driving member 7 includes a square body 71, a front driving plate 721 and a rear driving plate 722 provided on both sides of the lower part of the square body 71, and a spring cavity 723 provided with a rear part and passing through the rear driving plate 722;

[0062] The front transmission hole 621 and the rear transmission hole 622 are respectively opposite to the front radial guide hole 11141 and the rear radial guide hole 11151, and the front driven driving plate 81 and the rear driven driving plate 82 extend into the front radial guide hole 11141 and the rear radial guide hole 11151 through the front transmission hole 621 and the rear transmission hole 622 and cooperate with the cylindrical body 131 and the static elastic plate 134 of the switching valve core 13, the dynamic valve body 31 and the dynamic elastic plate 316; the housing 6 is fixed to the water supply static valve body and the water return static valve body, and the square body 7 1 slides with and extends out of the square hole 611, and the front drive plate 721 and the rear drive plate 722 slide with the inclined hole portion 612; the spring 9 is arranged in the spring cavity 723, one end of which is matched with the closed end of the spring cavity, and the other end is matched with the closed end of the inclined hole portion 612, the front driven drive plate 81 and the rear driven drive plate 82 extend into the inclined hole portion 612 through the front transmission hole 621 and the rear transmission hole 622 respectively, and the front drive plate 721 and the rear drive plate 722 are matched with the front driven drive plate 81 and the rear driven drive plate 82 respectively.

[0063] Figure 3 , Fig.13 This is a view of the present invention in the circulation state. The static elastic plate 134 is engaged with the rear locking groove 1115, and the dynamic elastic plate 316 is engaged with the front locking groove 11141; when it is necessary to convert to the straight-through state;

[0064] The front part of the square body 71 is pressed, and the square body 71 moves into the square hole 611. The front driving plate 721 and the rear driving plate 722 drive the front driven driving plate 81 and the rear driven driving plate 82 to move respectively. The front driven driving plate 81 and the rear driven driving plate 82 act on the static elastic plate 134 and the dynamic elastic plate 316 respectively, so that the static elastic plate 134 leaves the rear locking groove 1115 and enters the axial guide groove 1113, and the dynamic elastic plate 316 leaves the front locking groove 11141 and enters the axial guide groove 1113; then the holding fixed block 5 is moved forward, and the moving hand leaves the front part of the square body 71. Under the action of the spring 9, the driving member 7 is automatically reset;

[0065] When the static elastic plate 134 enters the front locking groove 11141, it is converted into a straight-through state; when the straight-through state is converted into a circulation state, the static valve direction of the fixed block can be directly moved.

[0066] When the static elastic plate 134 and the dynamic elastic plate 316 are in an inverted "U" shape as described above, their elasticity is utilized to lock with the front locking groove and the rear locking groove, and the fixed block is moved forward and backward to achieve the locking of the static elastic plate 134 and the dynamic elastic plate 316 with the front locking groove and the rear locking groove, or leaving the front locking groove and the rear locking groove and entering the axial guide groove 1113; adopting such a structure, the housing 6, the driving member 7, the front driven driving plate 81, the rear driven driving plate 82 and the spring 9 are omitted.

[0067] Straight-through state, that is, the water supply interface 114, the water supply and outlet interface 115, the return water inlet interface 214 and the return water outlet interface 215 are connected in sequence;

[0068] In the circulation state, the water supply static valve 1, the water supply dynamic valve 3, the heating end, the return water dynamic valve 4 and the return water static valve 2 are connected in sequence.

[0069] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heating main line and a heating terminal conversion device, characterized in that: It includes a water supply static valve, a return water static valve, a water supply dynamic valve, a return water dynamic valve and a fixing block. The water supply static valve includes a water supply static valve body, a water supply static spring and a water supply switching valve core. The water supply static valve body includes a supply static valve core cavity, a supply static valve stem and a supply static valve core, a water supply interface and a water supply and outlet interface. The supply static valve core cavity includes a guide limit cavity arranged on one side, two axial grooves opposite to each other up and down, and an axial guide groove arranged on the upper part of the other side. The axial groove is connected with the circumferential ends of the guide limit cavity, and the axial guide groove is provided with a front locking groove and a rear locking groove arranged front and back. The supply switching valve core includes a cylindrical body, a water inlet hole and a limit frame arranged on one side of the cylindrical body, a static elastic plate arranged on the other side, and a water outlet valve core cavity arranged in the water outlet end; [the supply static spring is arranged in the supply static valve core cavity, the cylindrical body is arranged in the supply static valve core cavity and cooperates with the supply static spring, the limit frame slides with the guide limit cavity, and the axial part of the limit frame slides with the axial groove; the supply static valve core and the water outlet valve core cavity slide; the static elastic plate and the axial guide groove slide and lock with the front locking groove or the rear locking groove; In the straight-through state, the water supply interface and the water outlet interface are connected, and in the circulation state, the water supply switching valve core closes the water outlet interface; The return static valve includes a return static valve body, a return static spring and a return switching valve core. The return static valve body includes a return static valve core cavity, a return static valve stem and a return static valve core, a return water inlet interface and a return water outlet interface. The return static valve core cavity and the return switching valve core have the same and symmetrical structures as the supply static valve core cavity and the supply switching valve core. The water supply actuator comprises an actuator valve body, an actuator valve core and an actuator spring. The actuator valve body comprises an actuator valve core cavity, an actuator valve core seat, an annular groove arranged in the other end, an annular driving plate arranged at one axial end of the annular groove, a countersunk hole and an actuator elastic plate; the actuator valve core comprises an actuator cylinder, an actuator valve stem and an actuator valve core plug, an annular spring cavity and an actuator tube body; the actuator spring is arranged in the annular spring cavity, the actuator cylinder is slidably matched with the actuator valve core cavity, the actuator valve core plug is matched with the water guide hole of the actuator valve core seat, the annular driving plate extends into the annular spring cavity and is driven and matched with one end of the water supply spring; the actuator tube body is slidably matched with the countersunk hole; The return water valve comprises a return valve body, a return valve core and a return spring. The return valve body and the supply valve body have the same structure and the dynamic elastic plates are symmetrical; the return valve core and the supply valve core have the same structure; The fixed block includes a supply fixing hole and a supply pipe hole and a return fixing hole and a return pipe hole, the supply fixing hole and the supply pipe hole are connected and are in a straight line, and the return fixing hole and the return pipe hole are connected and are in a straight line; The water supply static valve and the water return static valve are arranged on the left and right, and the water outlet interface and the water return inlet interface are connected; the supply moving valve body is fixed to the supply moving fixing hole, the supply moving pipe body is slidingly matched with the supply moving pipe hole, the return valve body is fixed to the return fixing hole, and the return pipe body is slidingly matched with the return pipe hole; the supply moving valve body and the return valve body are respectively plugged into and slidingly matched with the supply static valve core cavity and the return static valve core cavity, and are in contact and matched with the supply switching valve core and the return switching valve core, and the dynamic elastic plate is slidingly matched with the axial guide groove and matched with the rear locking groove.

2. A heating main line and heating terminal conversion device according to claim 1, characterized in that: The supply switching valve core and the return switching valve core are provided with a core axial groove adjacent to the axial part of the limit frame; The static supply valve core cavity and the static return core cavity are provided with axial protrusions, and the axial protrusions are slidably matched with the core axial grooves.

3. A heating main line and heating terminal conversion device according to claim 1 or 2, characterized in that: The supply static valve core cavity is provided with a front radial guide hole and a rear radial guide hole communicating with the front locking groove and the rear locking groove, and the return static valve core cavity is provided with a front radial guide hole and a rear radial guide hole communicating with the front locking groove and the rear locking groove; It also includes a housing, a driving member, a front driven driving plate, a rear driven driving plate and a spring, The housing is provided with front and rear guide holes, a front transmission hole and a rear transmission hole with a front opening, and the front and rear guide holes include a square hole and two inclined hole portions distributed in a trapezoidal shape, and the inclined hole portions are connected with the front transmission hole and the rear transmission hole; The driving member comprises a square body, a front driving plate and a rear driving plate arranged on both sides of the lower part of the square body, and a spring cavity provided with a rear part and passing through the rear driving plate; The front transmission hole and the rear transmission hole are respectively opposite to the front radial guide hole and the rear radial guide hole, the front driven drive plate and the rear driven drive plate extend into the front radial guide hole and the rear radial guide hole through the front transmission hole and the rear transmission hole, and cooperate with the cylindrical body and the static elastic plate of the supply switching valve core, the supply valve body and the dynamic elastic plate; the shell is fixed to the water supply static valve body and the return water static valve body, the square body part slides with the square hole and extends out, and the front drive plate and the rear drive plate slide with the inclined hole part; the spring is arranged in the spring cavity 7, one end cooperates with the closed end of the spring cavity, and the other end cooperates with the closed end of the inclined hole part, the front driven drive plate and the rear driven drive plate extend into the inclined hole part through the front transmission hole and the rear transmission hole respectively, and the front drive plate and the rear drive plate cooperate with the front driven drive plate and the rear driven drive plate respectively.

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