A three-way reversing valve

Abstract

The utility model discloses a three -way reversing valve, including valve seat, the inside intermediate of valve seat is equipped with the valve core, the upper end of valve seat is equipped with the valve cover, and the upper end middle part of valve cover is equipped with the dust cover, still include switching mechanism, switching mechanism: it includes valve rod, sleeve, worm wheel, worm, connecting hole, connecting bolt and drive assembly, and the inside intermediate of valve rod is rotatably connected in the valve cover, and the upper end middle part of sleeve is rotatably connected in the valve cover, and the outer surface middle part of sleeve is fixedly sleeved in the worm wheel, and the inside right side of dust cover is rotatably connected in the worm, and the worm wheel is engaged connection with the worm, and the connecting hole is evenly set up in the outer surface middle part of valve rod, this three -way reversing valve, is equipped with switching mechanism, and the automatic reversing work of three -way reversing valve is driven through motor usually, when the power failure and motor damage occur, can be switched to manual drive fast, avoided the situation that motor and valve rod direct connection can not manual reversing to occur.

Description

Technical Field

[0001] This utility model relates to the field of three-way reversing valve technology, specifically a three-way reversing valve. Background Technology

[0002] A three-way directional valve is a control device used in fluid pipeline systems. It achieves flow direction switching between three ports by changing the internal channel connection method. It is commonly used for liquid or gas diversion, merging, or direction adjustment. Its core function is to change the flow path by moving the valve core or valve plate. It features a compact structure and fast response, and is widely used in chemical, HVAC, and hydraulic fields. Existing three-way directional valves are mostly three-way ball valves, consisting of a valve seat, valve core, valve stem, valve cover, and drive motor. The valve stem is located at the upper end of the valve seat, and the output shaft of the drive motor is fixedly connected to the upper end of the valve stem. The valve core is rotatably connected inside the valve seat and inserted into the lower end of the valve stem. The valve core has a T-shaped through hole inside. During use, the drive motor drives the valve stem and valve core to rotate, and the T-shaped through hole also rotates accordingly, thereby changing the flow path and achieving flow direction switching. Traditional three-way directional valves have the output shaft of the drive motor directly connected to the valve stem, lacking a switchable manual switching mechanism. In the event of a power outage or drive motor failure, the flow direction cannot be immediately controlled. Therefore, we propose a new three-way directional valve. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a three-way reversing valve with a switching mechanism. Normally, the three-way reversing valve is automatically reversed by a motor. In the event of a power outage or motor failure, it can be quickly switched to manual drive, avoiding the situation where the motor is directly connected to the valve stem and cannot be manually reversed. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a three-way reversing valve, including a valve seat, a valve core disposed in the middle of the interior of the valve seat, a valve cover disposed at the upper end of the valve seat, a dust cover disposed at the middle of the upper end of the valve cover, and a switching mechanism;

[0005] The switching mechanism includes a valve stem, a sleeve, a worm gear, a worm, a connecting hole, a connecting bolt, and a drive assembly. The valve stem is rotatably connected to the center of the valve cover, the sleeve is rotatably connected to the center of the upper end of the valve cover, the worm gear is fixedly sleeved on the center of the outer surface of the sleeve, and the worm is rotatably connected to the right side of the dust cover. The worm gear and the worm are meshed together. The connecting hole is evenly distributed in the center of the outer surface of the valve stem, and the connecting bolt is threaded to the right side of the upper end of the sleeve. The inner end of the connecting bolt is threaded to the inner wall of the connecting hole, providing a basis for switching between automatic and manual reversing. The drive assembly is respectively located at the upper end of the valve stem and the front end of the worm. A switching mechanism is provided. Normally, the three-way reversing valve is automatically reversed by a motor. In case of power failure or motor damage, it can be quickly switched to manual drive, avoiding the situation where the motor and valve stem are directly connected and manual reversing is not possible.

[0006] Furthermore, the drive assembly includes a cross-shaped slot, a motor, and a cross-shaped plug. The cross-shaped slot is located at the upper end of the valve stem, and a mounting bracket is provided at the upper end of the dust cover. The motor is located at the upper middle part of the mounting bracket, and the input end of the motor is electrically connected to an external controller. The cross-shaped plug is located at the lower end of the output shaft of the motor, and the outer surface of the cross-shaped plug is inserted into the inner wall of the cross-shaped slot, providing a foundation for the connection between the motor and the valve stem.

[0007] Furthermore, the drive assembly also includes a hexagonal connector and a handle. The hexagonal connector is located at the front end of the worm gear, and the handle is inserted into the outer surface of the hexagonal connector through the hexagonal connection hole at the rear end, providing a drive effect for manual reversing.

[0008] Furthermore, the diagonal length of the connecting bolt head is the same as the diagonal length of the hexagonal connector, the side length of the connecting bolt head is the same as the side length of the hexagonal connector, and the distance between opposite sides of the connecting bolt head is the same as the distance between opposite sides of the hexagonal connector. The handle is installed in conjunction with the connecting bolt, and the connecting bolt can also be driven by the handle.

[0009] Furthermore, the switching mechanism also includes arrow markings, which are evenly distributed on the upper part of the outer surface of the valve stem. The arrow markings are all vertically adjacent to the connecting holes. The upper part of the outer surface of the valve stem is provided with evenly distributed anti-slip protrusions to provide markings for the switching operation.

[0010] Furthermore, it also includes a hexagonal plug, a hexagonal socket, a limiting post, and a limiting hole. The hexagonal plug is located at the lower end of the valve stem, the hexagonal socket is located at the upper middle part of the valve core, and the outer surface of the hexagonal plug is inserted into the inner wall of the hexagonal socket. The limiting post is located in the middle of the bottom wall of the valve seat, and the limiting hole is located at the lower middle part of the valve core. The outer surface of the limiting post is inserted into the inner wall of the limiting hole, providing limiting and connection effects for the valve core.

[0011] Furthermore, the valve core is spherical in shape, and its outer surface is rotatably connected to the inner wall of the valve seat. A T-shaped through hole is provided inside the valve core to provide a basis for switching the flow direction.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This three-way reversing valve has the following advantages:

[0013] Normally, the motor directly drives the valve stem and valve core to rotate, enabling the three-way directional valve to automatically switch. In the event of a power outage or motor failure, tightening the connecting bolts connects the sleeve to the valve stem. Then, turning the handle drives the worm gear and worm wheel to rotate, thus manually driving the valve stem and valve core to rotate. This is suitable for manual and rapid switching of the three-way directional valve in emergency situations, avoiding the situation where the motor and valve stem are directly connected and cannot be manually switched. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the switching mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the dust cover of this utility model;

[0017] Figure 4 This is a schematic diagram of the valve stem and valve core of this utility model.

[0018] In the diagram: 1 Valve seat, 2 Valve core, 3 Valve cover, 4 Dust cover, 5 Switching mechanism, 51 Valve stem, 52 Sleeve, 53 Worm gear, 54 Worm, 55 Connecting hole, 56 Connecting bolt, 57 Drive assembly, 571 Cross slot, 572 Motor, 573 Cross plug, 574 Hex connector, 575 Handle, 58 Arrow marking, 6 Hex plug, 7 Hex socket, 8 Limit post, 9 Limit hole, 10 Mounting bracket, 11 T-hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4This embodiment provides a technical solution: a three-way reversing valve, including a valve seat 1, a valve core 2 disposed in the center of the valve seat 1, ports on the left and right sides and the front end of the valve seat 1, and connecting flanges at the ports for connection to external pipelines. A valve cover 3 is disposed at the upper end of the valve seat 1, and the valve cover 3 is connected to the valve seat 1 by flanges and bolts. A dust cover 4 is disposed at the upper center of the valve cover 3. The valve also includes a hexagonal plug 6, a hexagonal socket 7, a limiting post 8, and a limiting hole 9. The hexagonal plug 6 is disposed at the lower end of the valve stem 51, and the hexagonal socket 7 is disposed at the valve core 2. At the upper middle part, the outer surface of the hexagonal plug 6 is inserted into the inner wall of the hexagonal socket 7 to connect the valve core 2 and the valve stem 51. The limiting post 8 is set in the middle of the bottom wall of the valve seat 1, and the limiting hole 9 is opened in the lower middle part of the valve core 2. The outer surface of the limiting post 8 is inserted into the inner wall of the limiting hole 9 to limit the valve core 2 and provide the limiting and connection effect for the valve core 2. The valve core 2 is spherical in shape. The outer surface of the valve core 2 is rotatably connected to the inner wall of the valve seat 1. The valve core 2 has a T-shaped through hole 11 inside to provide a basis for the switching of flow direction. It also includes a switching mechanism 5.

[0021] Switching mechanism 5 includes a valve stem 51, a sleeve 52, a worm gear 53, a worm 54, a connecting hole 55, a connecting bolt 56, and a drive assembly 57. The valve stem 51 is rotatably connected to the middle of the inside of the valve cover 3. The sleeve 52 is rotatably connected to the middle of the upper end of the valve cover 3. A mounting groove is provided in the middle of the upper end of the valve cover 3. A bearing is provided inside the mounting groove. The outer edge of the outer ring of the bearing is fixedly connected to the inner wall of the mounting groove. The lower end of the outer surface of the sleeve 52 is fixedly connected to the inner wall of the inner ring of the bearing. The valve stem 51 passes through the middle of the inside of the sleeve 52. The worm gear 53 is fixedly sleeved in the middle of the outer surface of the sleeve 52. The worm 54 is rotatably connected to the right side of the inside of the dust cover 4. The worm gear 53 and the worm 54 are meshed together. The connecting hole 55 is evenly opened in the middle of the outer surface of the valve stem 51. The connecting bolt... A threaded connection 56 is made to the upper right side of the inner end of the sleeve 52. The inner end of the connecting bolt 56 is threaded to the inner wall of the connecting hole 55, providing a basis for switching between automatic and manual reversing. The drive assembly 57 is respectively set at the upper end of the valve stem 51 and the front end of the worm gear 54. The drive assembly 57 includes a cross slot 571, a motor 572, and a cross plug 573. The cross slot 571 is located at the upper end of the valve stem 51. A mounting bracket 10 is provided at the upper end of the dust cover 4. The motor 572 is located at the upper middle part of the mounting bracket 10. The input end of the motor 572 is electrically connected to an external controller. The cross plug 573 is located at the lower end of the output shaft of the motor 572. The outer surface of the cross plug 573 is inserted into the inner wall of the cross slot 571, connecting the motor 572 and the valve stem 51. Based on the foundation, the drive assembly 57 also includes a hexagonal connector 574 and a handle 575. The hexagonal connector 574 is located at the front end of the worm gear 54. The handle 575 is inserted into the outer surface of the hexagonal connector 574 through a hexagonal connection hole at the rear end. Normally, the handle 575 can be suspended from the lower end of the three-way reversing valve by a chain for easy access in emergencies, providing a driving effect for manual reversing operations. The diagonal length of the head of the connecting bolt 56 is the same as the diagonal length of the hexagonal connector 574, the side length of the head of the connecting bolt 56 is the same as the side length of the hexagonal connector 574, and the distance between opposite sides of the head of the connecting bolt 56 is the same as the distance between opposite sides of the hexagonal connector 574. The handle 575 is installed in conjunction with the connecting bolt 56, and the hexagonal connection hole of the handle 575... The valve stem 5 can be inserted into the head of the connecting bolt 56 for tightening. The connecting bolt 56 can be driven by the handle 575. The switching mechanism 5 also includes arrow markings 58, which are evenly distributed on the upper part of the outer surface of the valve stem 51. Each arrow marking 58 is vertically adjacent to the connecting hole 55. The four arrow markings 58 are different colors to facilitate quick identification of the flow state of the three-way reversing valve. The upper part of the outer surface of the valve stem 51 is provided with evenly distributed anti-slip protrusions to facilitate manual deflection of the valve stem 51 in emergencies, providing identification for switching operations. The switching mechanism 5 is equipped with a motor 572 that drives the three-way reversing valve to automatically switch directions under normal conditions. In the event of a power outage or damage to the motor 572, it can be quickly switched to manual operation.This avoids the situation where the motor 572 is directly connected to the valve stem 51 and cannot be manually reversed.

[0022] The working principle of the three-way reversing valve provided by this utility model is as follows: When using the three-way reversing valve, the pipeline is connected to the three ports of the three-way reversing valve. In the automatic reversing state, the external controller controls the motor 572 to run. Since there is a plugging effect between the cross slot 571 and the cross plug 573, the output shaft of the motor 572 can drive the valve stem 51 to rotate, and the valve core 2 also rotates accordingly. The port on the front side of the valve seat 1 is designated as port A, the port on the right side is designated as port B, and the port on the left side is designated as port C. The front end of the T-shaped through hole 11 is designated as port a, the right end of the T-shaped through hole 11 is designated as port b, and the left end of the T-shaped through hole 11 is designated as port c. Initially, ports A and B, and C and C are all connected. When valve core 2 deflects 90 degrees to the right from its initial state, port C closes, and ports A and C become connected, achieving connection between ports A and B. When valve core 2 deflects 90 degrees to the left from its initial state, port B closes, and ports A and C become connected, achieving connection between ports A and C. When valve core 2 deflects 180 degrees to the right from its initial state, port A closes, and ports B and C become connected, achieving connection between ports B and C. The connection between them enables the three-way reversing valve to switch directions. In case of power failure or damage to the motor 572, manual switching is required. First, observe whether the arrow 58 is vertically adjacent to the connecting bolt 56. If the arrow 58 is not vertically adjacent to the connecting bolt 56, rotate the valve stem 51 using the anti-slip protrusion to make the arrow 58 vertically adjacent to the connecting bolt 56. Then, observe the color of the arrow 58 to determine the position of each port of each T-hole 11. Manually rotate the connecting bolt 56 to initially thread it into the corresponding connecting hole 55. When the connecting bolt 56 cannot be tightened by hand, remove the handle 57. 5. Insert the hexagonal connecting hole on handle 575 into the head of connecting bolt 56, and turn handle 575 to tighten connecting bolt 56. At this time, sleeve 52 and valve stem 51 are connected together by connecting bolt 56. Insert the hexagonal connecting hole on handle 575 into the surface of hexagonal connector 574, and turn handle 575 to drive worm gear 54 to rotate. Worm wheel 53 also rotates. By changing the rotation direction of handle 575 and observing the position of different colored arrow markings 58, the flow direction can be switched. This is suitable for manual quick switching of three-way reversing valve in emergency situations, avoiding the situation where motor 572 and valve stem 51 are directly connected and cannot be manually switched.

[0023] It is worth noting that the motor 572 disclosed in the above embodiments is a KDM motor, and the external controller controls the operation of the motor 572 using methods commonly used in the prior art.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A three-way reversing valve, comprising a valve seat (1), wherein a valve core (2) is disposed in the middle of the interior of the valve seat (1), a valve cover (3) is disposed at the upper end of the valve seat (1), and a dust cover (4) is disposed at the middle of the upper end of the valve cover (3), characterized in that: It also includes a switching mechanism (5); Switching mechanism (5): It includes valve stem (51), sleeve (52), worm wheel (53), worm (54), connecting hole (55), connecting bolt (56) and drive assembly (57). The valve stem (51) is rotatably connected to the middle of the inside of the valve cover (3). The sleeve (52) is rotatably connected to the middle of the upper end of the valve cover (3). The worm wheel (53) is fixedly sleeved on the middle of the outer surface of the sleeve (52). The worm (54) is rotatably connected to the right side of the inside of the dust cover (4). The worm wheel (53) and the worm (54) are meshed. The connecting hole (55) is evenly opened in the middle of the outer surface of the valve stem (51). The connecting bolt (56) is threadedly connected to the right side of the upper end of the sleeve (52). The inner end of the connecting bolt (56) is threadedly connected to the inner wall of the connecting hole (55). The drive assembly (57) is respectively set at the upper end of the valve stem (51) and the front end of the worm (54).

2. A three-way reversing valve according to claim 1, characterized in that: The drive assembly (57) includes a cross slot (571), a motor (572), and a cross plug (573). The cross slot (571) is located at the upper end of the valve stem (51). The upper end of the dust cover (4) is provided with a mounting bracket (10). The motor (572) is located at the middle of the upper end of the mounting bracket (10). The input end of the motor (572) is electrically connected to an external controller. The cross plug (573) is located at the lower end of the output shaft of the motor (572). The outer surface of the cross plug (573) is inserted into the inner wall of the cross slot (571).

3. A three-way reversing valve according to claim 1, characterized in that: The drive assembly (57) also includes a hexagonal connector (574) and a handle (575). The hexagonal connector (574) is located at the front end of the worm (54), and the handle (575) is inserted into the outer surface of the hexagonal connector (574) through a hexagonal connection hole at the rear end.

4. A three-way reversing valve according to claim 3, characterized in that: The diagonal length of the bolt head of the connecting bolt (56) is the same as the diagonal length of the hexagonal connector (574), the side length of the bolt head of the connecting bolt (56) is the same as the side length of the hexagonal connector (574), the distance between opposite sides of the bolt head of the connecting bolt (56) is the same as the distance between opposite sides of the hexagonal connector (574), and the handle (575) is installed in conjunction with the connecting bolt (56).

5. A three-way reversing valve according to claim 1, characterized in that: The switching mechanism (5) also includes arrow markers (58), which are evenly distributed on the upper surface of the valve stem (51). The arrow markers (58) are all vertically adjacent to the connecting holes (55). The upper surface of the valve stem (51) is provided with evenly distributed anti-slip protrusions.

6. A three-way reversing valve according to claim 1, characterized in that: It also includes a hexagonal plug (6), a hexagonal socket (7), a limiting post (8), and a limiting hole (9). The hexagonal plug (6) is located at the lower end of the valve stem (51), the hexagonal socket (7) is located at the middle of the upper end of the valve core (2), and the outer surface of the hexagonal plug (6) is inserted into the inner wall of the hexagonal socket (7). The limiting post (8) is located in the middle of the bottom wall of the valve seat (1), and the limiting hole (9) is located at the middle of the lower end of the valve core (2). The outer surface of the limiting post (8) is inserted into the inner wall of the limiting hole (9).

7. A three-way reversing valve according to claim 1, characterized in that: The valve core (2) is spherical in shape. The outer surface of the valve core (2) is rotatably connected to the inner wall of the valve seat (1). A T-shaped through hole (11) is opened inside the valve core (2).

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