Constant temperature control valve with stuck emergency function

Abstract

The utility model provides a constant temperature control valve with stuck emergency function belongs to engine thermal management technical field. It solved the existing constant temperature control valve and led to the problem such as unable normal work because of stuck. This constant temperature control valve with stuck emergency function, including valve body and executor, be provided with valve core in the valve body, be provided with valve seat between valve core and valve body, and the executor includes the casing and the intermeshing worm wheel and worm, fixedly has motor in the casing, the rotating shaft of motor is connected with the worm, and the valve rod is fixedly connected on the worm wheel, and the valve rod is connected with the valve core, and the transmission gear is on the worm, and the rotatable axle rod is arranged on the lateral wall of casing, and the manual gear is fixedly connected on the inner end of axle rod and engages with transmission gear, and the outer end of axle rod has the positioning hole for being connected with spanner. This constant temperature control valve can restore normal work through the manual rotation axle rod and make constant temperature control valve, has stuck emergency function.

Description

Technical Field

[0001] This utility model belongs to the field of engine thermal management technology and relates to a thermostatic control valve with a jamming emergency function. Background Technology

[0002] The normal operating temperature of an engine is 80℃-90℃. Automobiles are equipped with an engine thermal management module to control the flow of coolant. This module cools the engine when the temperature is too high, maintaining it at a suitable operating temperature—a constant 80℃-90℃. Therefore, the engine thermal management module is also known as the engine's thermostatic control valve, which is equipped with an electronically controlled actuator.

[0003] A thermostatic control valve includes a valve body containing a valve core. A valve seat is mounted against the side of the valve core, and a valve stem is connected to the top of the valve core. The valve stem passes through the top of the valve body and connects to an electric actuator. For example, the thermostatic control valve disclosed in Chinese patent document CN213776376U has a motor fixed inside the actuator at the top of the valve body. A worm gear mechanism is provided between the motor and the valve stem. The worm is connected to the output end of the motor, and the worm wheel is connected to the valve stem. During operation, the motor rotates, driving the valve stem to rotate through the worm gear mechanism, thereby rotating the valve core to adjust the flow rate. After the motor is installed, its parameters are fixed, that is, the maximum driving force of the motor is a fixed value. The thermostatic control valve is installed in the coolant circulation system, and impurities can easily mix into the coolant. During use, if foreign objects appear in the valve body and enter between the valve core and the valve seat, causing the valve core to jam, the resistance formed by the jamming, if it exceeds the maximum driving force of the motor, will cause the thermostatic control valve to seize up and fail to work normally. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a thermostatic control valve with an emergency jamming function, thus solving the technical problem that existing thermostatic control valves cannot function properly due to jamming.

[0005] The objective of this utility model can be achieved through the following technical solutions: A thermostatic control valve with a jamming emergency function includes a valve body and an actuator. A valve core is disposed within the valve body, and a valve seat is disposed between the valve core and the valve body. The actuator includes a housing and a meshing worm gear and worm shaft. A motor is fixed inside the housing, and the motor shaft is connected to the worm shaft. A valve stem is fixedly connected to the worm gear and is connected to the valve core. The worm shaft has a transmission gear, and a rotatable shaft passes through the side wall of the housing. A manual gear meshing with the transmission gear is fixedly connected to the inner end of the shaft, and the outer end of the shaft has a positioning hole for connecting to a wrench.

[0006] During operation, the motor drives the valve stem to rotate via a worm gear and worm wheel, which in turn rotates the valve core to regulate flow. If a foreign object enters the valve body, causing the valve core to become stuck and preventing the motor from driving it, a wrench is connected to the shaft through the positioning hole. Manually rotating the shaft causes the worm gear to rotate via a manual gear and transmission gear, which in turn drives the valve core to rotate via the worm wheel and valve stem. After the valve core rotates, the flow of coolant washes away the foreign object, restoring the thermostatic control valve to normal operation. Therefore, this thermostatic control valve can be manually rotated to restore normal operation, providing an emergency function in case of jamming.

[0007] In the aforementioned thermostatic control valve with a jamming emergency function, a bushing is fixed to the housing, and the shaft passes through the bushing. The bushing provides support and positioning for the shaft, ensuring stable rotation of the shaft.

[0008] In the aforementioned thermostatic control valve with a jamming emergency function, an oil seal is also fixed to the housing, and the shaft passes through the oil seal, which is located outside the bushing. The oil seal prevents foreign objects from entering the housing, ensuring stable operation of the actuator.

[0009] In the aforementioned thermostatic control valve with an emergency jamming function, one end of the manual gear rotating shaft is inserted into and fixed in the shaft rod, while the other end of the manual gear rotating shaft is inserted into the side wall of the housing. This provides two points of support for the shaft rod and the manual gear, ensuring stable rotation of the shaft rod.

[0010] In the aforementioned thermostatic control valve with a jamming emergency function, the side wall of the housing has a cylindrical connecting sleeve. The shaft passes through the connecting sleeve, and a detachable end cap for covering the shaft is fixedly connected to the outer end of the connecting sleeve. During normal operation, the end cap seals the outer end of the connecting sleeve, thereby protecting the shaft. When manual rotation of the valve core is required, the end cap is removed, and then the outer end of the shaft is rotated.

[0011] In the aforementioned thermostatic control valve with a jamming emergency function, several slots are provided on the side wall of the connecting cylinder. The slots are L-shaped, consisting of an axial section along the axis of the connecting cylinder and a circumferential section along the circumference of the connecting cylinder. The axial section penetrates the outer end face of the connecting cylinder, and the end cap has a corresponding protrusion that can be inserted from the axial section of the slot into the circumferential section.

[0012] When installing the end cap, align the protrusion with the opening of the axial section of the slot, then move the end cap into the connecting cylinder so that the protrusion is located at the bend of the slot. Then rotate the end cap to insert the protrusion into the circumferential section, thus fixing the end cap in the connecting cylinder. When disassembling, rotate the end cap in the opposite direction so that the protrusion enters the bend of the slot, and then move the end cap outward to remove it. The end cap is easy to install and remove.

[0013] In the aforementioned thermostatic control valve with a jamming emergency function, the end cap is threadedly connected to the connecting cylinder. The threaded connection ensures a stable end cap connection and facilitates easy disassembly.

[0014] In the aforementioned thermostatic control valve with a jamming emergency function, the outer end face of the end cap has a protruding grip strip. The grip strip facilitates the rotation and movement of the end cap, making it easy to assemble and disassemble.

[0015] In the aforementioned thermostatic control valve with an emergency jamming function, the positioning hole is a hexagonal hole. This facilitates the use of a hexagonal wrench to drive the shaft.

[0016] Compared with the prior art, the present invention has the following advantages: When the valve core becomes stuck due to foreign objects, the valve core can be driven by manually rotating the shaft, allowing the foreign objects to be flushed away by the flowing coolant, thus restoring the thermostatic control valve to normal operation. This thermostatic control valve has an emergency jamming function. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the thermostatic control valve.

[0018] Figure 2 This is a 3D view of the actuator of this thermostatic control valve after the top cover is opened.

[0019] Figure 3 This is a sectional view of the shaft of the thermostatic control valve.

[0020] Figure 4 This is a 3D view of the actuator of this thermostatic control valve.

[0021] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0022] In the diagram, 1 is the valve body; 2 is the valve core; 3 is the valve seat; 4 is the housing; 4a is the connecting cylinder; 4a1 is the slot; 4a1a is the axial section; 4a1b is the circumferential section; 5 is the worm gear; 5a is the transmission gear; 6 is the worm wheel; 7 is the motor; 8 is the drive gear; 9 is the valve stem; 10 is the shaft; 10a is the positioning hole; 11 is the manual gear; 12 is the bushing; 13 is the oil seal; 14 is the end cover; 14a is the grip bar; and 14b is the retaining protrusion. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 and Figure 2As shown, a thermostatic control valve with a jamming emergency function includes a valve body 1 and an actuator. A valve core 2 is disposed within the valve body 1, and a valve seat 3 is disposed between the side of the valve core 2 and the valve body 1. The actuator includes a housing 4, a worm gear 5, and a worm wheel 6. The housing 4 includes a lower shell and an upper cover, which are fixedly connected after being closed. The lower shell is fixedly connected to the top of the valve body 1 by screws. A motor 7 is fixedly disposed within the housing 4, and a drive gear 8 is fixedly connected to the shaft of the motor 7. The worm gear 5 meshes with the worm wheel 6, and a valve stem 9 is fixedly connected to the worm wheel 6. The valve stem 9 passes through the housing 4 and the valve body 1 and connects to the top of the valve core 2. The worm gear 5 has a transmission gear 5a, and the drive gear 8 meshes with the transmission gear 5a. The worm gear 5 can also be directly fixedly connected to the shaft of the motor 7.

[0025] like Figure 2 and Figure 3 As shown, a rotatable shaft 10 is mounted on the side wall of the housing 4, and a manual gear 11 that meshes with the transmission gear 5a is fixedly connected to the inner end of the shaft 10. A bushing 12 is fixed to the housing 4, and the shaft 10 passes through the bushing 12. A positioning hole 10a is provided on the outer end face of the shaft 10, which is used to connect with a wrench. The positioning hole 10a is a hexagonal hole and is connected to a hexagonal wrench. An oil seal 13 is also fixed to the housing 4, and the shaft 10 passes through the oil seal 13, which is located outside the bushing 12. One end of the rotating shaft of the manual gear 11 is inserted into the shaft 10 and fixed, while the other end of the rotating shaft of the manual gear 11 is inserted into the side wall of the housing 4.

[0026] like Figure 4 and Figure 5 As shown, the side wall of the housing 4 has a cylindrical connecting tube 4a, through which the shaft 10 passes. A detachable end cap 14 for shielding the shaft 10 is fixedly connected to the outer end of the connecting tube 4a. The outer end face of the end cap 14 has a protruding gripping strip 14a. Two slots 4a1 are formed on the side wall of the connecting tube 4a. Each slot 4a1 is L-shaped, consisting of an axial section 4a1a along the axial direction of the connecting tube 4a and a circumferential section 4a1b along the circumferential direction of the connecting tube 4a. The axial section 4a1a penetrates the outer end face of the connecting tube 4a. The end cap 14 has corresponding protrusions 14b on each slot 4a1, which can be inserted from the axial section 4a1a into the circumferential section 4a1b of the slot 4a1. The slots 4a1 can also be three or four. Alternatively, the end cap 14 can be threaded onto the connecting tube 4a.

[0027] During operation, motor 7 drives valve stem 9 to rotate via worm gear 5 and worm wheel 6, thereby rotating valve core 2 to regulate flow. When foreign objects inside valve body 1 cause valve core 2 to become stuck and motor 7 cannot drive it, motor 7 is turned off, end cover 14 is opened, and a wrench is connected to shaft 10. Shaft 10 can be manually rotated, and shaft 10 drives worm gear 5 to rotate via manual gear 11 and transmission gear 5a, thereby driving valve core 2 to rotate via worm wheel 6 and valve stem 9. After valve core 2 rotates, the flow of coolant can flush away foreign objects on valve core 2, allowing the thermostatic control valve to return to normal operation. This manual operation can be performed manually using a manual wrench or electric wrench to rotate shaft 10. Furthermore, motor 7 is a standard motor that can rotate even when power is off, i.e., a motor without a self-locking function. Therefore, this thermostatic control valve can be restored to normal operation by manually rotating shaft 10, providing an emergency jamming function.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A thermostatic control valve with a jamming emergency function, comprising a valve body (1) and an actuator, wherein a valve core (2) is disposed inside the valve body (1), and a valve seat (3) is disposed between the valve core (2) and the valve body (1), the actuator comprising a housing (4) and a meshing worm gear (6) and a worm (5), a motor (7) is fixed inside the housing (4), the shaft of the motor (7) is connected to the worm (5), a valve stem (9) is fixedly connected to the worm gear (6), and the valve stem (9) is connected to the valve core (2), characterized in that, The worm (5) has a transmission gear (5a), and a rotatable shaft (10) is provided on the side wall of the housing (4). A manual gear (11) that meshes with the transmission gear (5a) is fixedly connected to the inner end of the shaft (10), and the outer end of the shaft (10) has a positioning hole (10a) for connecting with a wrench.

2. The thermostatic control valve with a jamming emergency function according to claim 1, characterized in that, A bushing (12) is fixed on the housing (4), and the shaft (10) passes through the bushing (12).

3. The thermostatic control valve with a jamming emergency function according to claim 2, characterized in that, An oil seal (13) is also fixed on the housing (4), and the shaft (10) passes through the oil seal (13). The oil seal (13) is located on the outside of the bushing (12).

4. The thermostatic control valve with a jamming emergency function according to claim 1, characterized in that, One end of the rotating shaft of the manual gear (11) is inserted into the shaft (10) and fixed, and the other end of the rotating shaft of the manual gear (11) is inserted into the side wall of the housing (4).

5. The thermostatic control valve with a jamming emergency function according to any one of claims 1-4, characterized in that, The side wall of the housing (4) has a cylindrical connecting tube (4a), the shaft (10) passes through the connecting tube (4a), and the outer end of the connecting tube (4a) is fixedly connected to a detachable end cap (14) for covering the shaft (10).

6. The thermostatic control valve with a jamming emergency function according to claim 5, characterized in that, The side wall of the connecting cylinder (4a) is provided with several slots (4a1). Each slot (4a1) is L-shaped, consisting of an axial section (4a1a) arranged along the axial direction of the connecting cylinder (4a) and a circumferential section (4a1b) arranged along the circumference of the connecting cylinder (4a). The axial section (4a1a) penetrates the outer end face of the connecting cylinder (4a). The end cap (14) has a corresponding protrusion (14b) on it. The protrusion (14b) can be inserted from the axial section (4a1a) of the slot (4a1) into the circumferential section (4a1b).

7. The thermostatic control valve with a jamming emergency function according to claim 5, characterized in that, The end cap (14) is threaded onto the connecting cylinder (4a).

8. The thermostatic control valve with a jamming emergency function according to claim 5, characterized in that, The end cap (14) has a protruding grip strip (14a) on its outer end face.

9. The thermostatic control valve with a jamming emergency function according to any one of claims 1-4, characterized in that, The positioning hole (10a) is a hexagonal hole.

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