Valve device

Abstract

The utility model discloses a valve device. The valve device comprises a shell, an actuator and a connecting assembly, the actuator is installed in the shell, the connecting assembly comprises a connecting piece and a transmission shaft, one end of the connecting piece is connected to the shell, the other end of the connecting piece is connected to a valve seat, the transmission shaft penetrates through the connecting piece, one end of the transmission shaft is connected to the output end of the actuator, and the other end of the transmission shaft is connected to the valve seat. The actuator can drive the valve element to open or close the valve seat through the transmission shaft, and a first sealing piece is arranged between the transmission shaft and the connecting piece, so that the sealing performance of the actuator is improved, and water is prevented from entering the actuator along with the transmission shaft.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field more particularly, relate to a valve device. BACKGROUND

[0002] In the related art, the large-diameter flange ball valve of intelligent control is generally controlled by the actuator to control the on-off of the pipeline. However, the existing ball valve has poor sealing performance for the actuator, and water can easily enter the actuator along the rotating shaft to damage the circuit.

[0003] Therefore, there is a need to provide a new technical solution to solve the above technical problems. SUMMARY

[0004] An object of the utility model is to provide a new technical solution for a valve device.

[0005] According to the first aspect of the utility model, a valve device is provided. The valve device comprises:

[0006] a housing;

[0007] an actuator installed in the housing;

[0008] a connecting assembly comprising a connecting piece and a transmission shaft, one end of the connecting piece being connected to the housing, the other end being connected to a valve seat, the transmission shaft being provided in the connecting piece, one end of the transmission shaft being connected to the output end of the actuator, the other end being connected to a valve core, the actuator being capable of driving the valve core to open or close the valve seat through the transmission shaft;

[0009] wherein a first sealing member is provided between the transmission shaft and the connecting piece.

[0010] Optionally, the connecting piece is provided with a through hole, the transmission shaft is provided in the through hole, and a first sealing groove is provided on the inner wall of the through hole around the circumference of the transmission shaft; and / or, the transmission shaft is provided with a first sealing groove in the circumferential direction; wherein the first sealing member is arranged in the first sealing groove.

[0011] Optionally, a second sealing member is provided between the connecting piece and the housing.

[0012] Optionally, a second sealing groove is provided on the end of the connecting piece facing the housing around the circumference of the transmission shaft; and / or, a second sealing groove is provided on the end of the housing facing the connecting piece around the circumference of the transmission shaft; wherein the second sealing member is arranged in the second sealing groove.

[0013] Optionally, the connecting piece is provided with a first connecting part at the end facing the housing, and the first connecting part is arranged around the outer circumference of the second sealing groove.

[0014] Optionally, one of the connecting piece and the valve seat is provided with a first protrusion, and the other is provided with a first recess matched with the first protrusion.

[0015] Optionally, a first sealing cavity is arranged in the shell, and the actuator is arranged in the first sealing cavity.

[0016] Optionally, the shell comprises a first shell and a first sealing shell, the first sealing shell is connected to the inner wall of the first shell to form the first sealing cavity, one end of the connecting piece is connected to the first shell, and one end of the transmission shaft is arranged in the first shell to be connected to the actuator.

[0017] Optionally, one of the first shell and the second shell is provided with a second protrusion, and the other is provided with a second recess matched with the second protrusion.

[0018] Optionally, a third sealing piece is arranged in the second recess, and the second protrusion abuts against the third sealing piece.

[0019] Optionally, a circuit board is further arranged, a second sealing cavity is arranged in the shell, and the circuit board is arranged in the second sealing cavity.

[0020] Optionally, a power supply assembly is further arranged, the power supply assembly is detachably arranged in the shell, and the power supply assembly is electrically connected to the actuator.

[0021] One technical effect of the present application is that one end of the connecting piece is connected to the shell, the other end is connected to the valve seat, the transmission shaft is arranged in the connecting piece, one end of the transmission shaft is connected to the output end of the actuator, the other end is connected to the valve core, the actuator can drive the valve core to open or close the valve seat through the transmission shaft, the first sealing piece is arranged between the transmission shaft and the connecting piece, so as to improve the sealing performance of the actuator and avoid water entering the actuator along the transmission shaft.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, which together with the embodiments of the present application serve to explain the present application, and do not constitute a limitation on the present application.

[0024] Figure 1 is a structural schematic view of a valve device of an embodiment of the present application.

[0025] Figure 2 is a structural schematic view of a connecting piece of a valve device of an embodiment of the present application.

[0026] Figure 3 is Figure 2 A sectional view of the connecting piece shown.

[0027] Figure 4 is Figure 2 A top view of the connecting piece shown.

[0028] Figure 5 is a structural schematic view of a transmission shaft of a valve device of an embodiment of the present application.

[0029] Figure 6 is a structural schematic view of a transmission shaft of a valve device of an embodiment of the present application.

[0030] Figure 7 is a structural schematic view of a power supply shell of an embodiment of the present application.

[0031] Figure 8 is a structural schematic view of a power supply shell of an embodiment of the present application.

[0032] Figure 9 is a structural schematic view of a power supply cover of an embodiment of the present application.

[0033] Reference signs:

[0034] 1, first shell; 2, second shell; 3, second sealing shell; 4, third sealing shell;

[0035] 5, first sealing shell;

[0036] 6, power supply cover; 6-1, first welding groove;

[0037] 7, power supply shell; 7-1, third connecting hole; 7-2, second welding groove; 7-3, reinforcing rib;

[0038] 8, power supply assembly; 9, actuator;

[0039] 10, transmission shaft; 10-1, protruding part; 10-2, first sealing groove; 10-3, clamping groove;

[0040] 11, connecting piece; 11-1, first connecting hole; 11-2, second sealing groove; 11-3, first connecting part; 11-4, second connecting hole; 11-5, first protrusion; 11-6, second connecting part; 11-7, through hole;

[0041] 12, valve body. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present application will now be described in detail with reference to the drawings. Note that the relative arrangement of the components and steps illustrated in these embodiments, numerical expressions, and numerical values are merely meant to be illustrative, not limiting the scope of the present application.

[0043] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the scope of the application or its application or uses.

[0044] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0045] In all of the examples shown and discussed herein, any specific values should be interpreted as merely illustrative, and not as a limitation. Other examples of the exemplary embodiments can have different values.

[0046] Note that like reference numerals and letters indicate like items in the accompanying drawings and, as such, once an item is defined in one drawing, that definition is applicable to all drawings accompanying this disclosure.

[0047] According to one embodiment of the present application, a valve device is provided. As shown in Figures 1 to 4 The valve device includes a housing, an actuator 9 and a connecting assembly. The actuator 9 is installed in the housing. The connecting assembly includes a connecting piece 11 and a transmission shaft 10. One end of the connecting piece 11 is connected to the housing, and the other end is connected to a valve seat. The transmission shaft 10 is disposed through the connecting piece 11. One end of the transmission shaft 10 is connected to an output end of the actuator 9, and the other end is connected to a valve core. The actuator 9 can drive the valve core to open or close the valve seat through the transmission shaft 10. A first sealing member is provided between the transmission shaft 10 and the connecting piece 11.

[0048] In this example, one end of the connecting piece 11 is connected to the housing, and the other end is connected to the valve seat. The transmission shaft 10 is disposed through the connecting piece 11. One end of the transmission shaft 10 is connected to the output end of the actuator 9, and the other end is connected to the valve core. The actuator 9 can drive the valve core to open or close the valve seat through the transmission shaft 10. A first sealing member is provided between the transmission shaft 10 and the connecting piece 11 to improve the sealing performance of the actuator 9 and prevent water from entering the actuator 9 along the transmission shaft 10.

[0049] The first seal is arranged between the connecting member 11 and the transmission shaft 10. For example, the first seal can be a sealing ring, the sealing ring is sleeved on the transmission shaft 10, and the outer wall of the sealing ring away from the transmission shaft 10 can abut against the inner wall of the connecting member 11 to play a sealing role. The first seal can be a sealing ring made of rubber or plastic, etc. The skilled person in the art can determine according to the actual situation, which is not specifically limited here.

[0050] As shown in Figure 1 , the shell includes a first shell 1 and a second shell 2, the first shell 1 is sealingly connected to the second shell 2 to form a mounting cavity, and the actuator 9 is fixedly arranged in the mounting cavity. The valve body 12 includes a valve seat and a valve core, the valve seat is provided with a passage, and the valve core is arranged in the valve seat and is suitable for opening or closing the passage.

[0051] In this example, one end of the transmission shaft 10 is drivingly connected to the valve core, the other end is arranged through the first shell 1, and is drivingly connected to the output end of the actuator 9. The actuator 9 can drive the valve core to open or close the passage through the transmission shaft 10. For example, the valve body 12 is a ball valve, the actuator 9 is a rotating motor, one end of the transmission shaft 10 is connected to the output shaft of the rotating motor, the other end is connected to the valve core, and the valve core is driven to rotate to adjust the opening or closing of the passage. The actuator 9 can be electrically connected to the intelligent control device, and the actuator 9 is operated through the intelligent control device to improve the operation accuracy of the actuator 9.

[0052] As shown in Figure 5 and Figure 6 , one end of the transmission shaft 10 is provided with a protruding portion 10-1, and the output shaft of the rotating motor is correspondingly provided with a clamping groove or a clamping hole, and the protruding portion 10-1 can be clamped on the output shaft. The other end of the transmission shaft 10 is provided with a clamping groove 10-3, and the valve core is provided with a protrusion corresponding to the clamping groove 10-3. Through the clamping mode, the installation steps and process can be simplified. Of course, the transmission shaft 10 can also be fixedly connected to the output shaft and the valve core by screws or bolts.

[0053] The valve body 12 further includes a valve rod, one end of the valve rod is connected to the valve core, and the other end is connected to the end of the transmission shaft 10 away from the actuator 9. The transmission shaft 10 can drive the valve core to open or close the passage through the valve rod. For example, one end of the valve rod is provided with a protruding structure corresponding to the clamping groove 10-3 on the transmission shaft 10.

[0054] The motor can be fixedly connected to the inner wall of the first shell 1 by screws or bolts, or can be fixedly connected by clamping or welding, etc. The skilled person in the art can determine according to the actual situation, which is not specifically limited here.

[0055] The first housing 1 is provided with an avoiding hole for avoiding the transmission shaft 10. One end of the connecting piece 11 is sealingly connected to the outer periphery of the avoiding hole to avoid water or dust from entering the housing from the avoiding hole. The transmission shaft 10 is arranged through the connecting piece 11, one end of the transmission shaft 10 passes through the avoiding hole and is connected to the output end of the actuator 9. A first sealing piece is arranged between the transmission shaft 10 and the connecting piece 11 to avoid water entering the first housing along the transmission shaft 10 and then entering the actuator 9 to damage the internal circuit.

[0056] In one example, the connecting piece 11 is provided with a through hole 11-7, the transmission shaft 10 is arranged through the through hole 11-7, and the inner wall of the through hole 11-7 is provided with a first sealing groove 10-2 around the circumference of the transmission shaft 10; and / or, the transmission shaft 10 is provided with a first sealing groove 10-2 along the circumference; wherein the first sealing piece is arranged in the first sealing groove 10-2.

[0057] As shown in Figures 1 to 4 , the connecting piece 11 is provided with a through hole 11-7, and the two ends of the through hole 11-7 correspond to the output end of the actuator 9 and the valve core respectively. The transmission shaft 10 is arranged through the through hole 11-7, so that one end of the transmission shaft 10 can be connected to the output end of the actuator 9, and the other end is drivingly connected to the valve core.

[0058] In this example, as shown in Figure 5 and Figure 6 , the transmission shaft 10 is provided with an annular first sealing groove 10-2 along the circumference. The first sealing piece is arranged in the first sealing groove 10-2, and the outer ring of the first sealing piece can abut against the inner wall of the through hole 11-7. By arranging the first sealing piece in the first sealing groove 10-2, the axial movement of the first sealing piece along the transmission shaft 10 can be limited to maintain the stability of the first sealing piece, thereby achieving stable sealing effect.

[0059] In this example, the first sealing groove 10-2 can also be arranged in the connecting piece 11. That is, the inner wall of the through hole 11-7 is provided with a first sealing groove 10-2 around the circumference of the transmission shaft 10, and the first sealing piece arranged in the first sealing groove 10-2 can also limit the first sealing piece. The inner ring of the first sealing piece abuts against the outer wall of the transmission shaft 10.

[0060] Furthermore, by arranging the first sealing groove 10-2, the first sealing piece is arranged in the first sealing groove 10-2 during installation, which can position the first sealing piece to facilitate installation.

[0061] The first sealing groove 10-2 can be provided in multiple numbers, and each of the first sealing grooves 10-2 can be provided with a first sealing member to improve the sealing effect. For example, the first sealing grooves 10-2 can be provided in the axial direction of the transmission shaft 10, or can be provided on the inner wall of the through hole 11-7, or the first sealing grooves 10-2 can be provided on the transmission shaft 10 and the through hole 11-7, respectively.

[0062] Of course, the first sealing groove 10-2 is not limited to the above-mentioned embodiments, and can be provided according to actual conditions by those skilled in the art.

[0063] In one example, a second sealing member is provided between the connecting member 11 and the housing.

[0064] One end of the connecting member 11 is connected to the housing, and a second sealing member is provided between the connecting member 11 and the housing to improve the sealing performance of the housing.

[0065] As shown in Figure 1 The housing includes a first housing 1, and the first housing 1 is provided with a relief hole for connecting the transmission shaft 10 to the actuator 9. One end of the connecting member 11 is sealingly connected to the outer periphery of the relief hole, that is, the through hole 11-7 of the connecting member 11 corresponds to the relief hole. The second sealing member can be provided around the through hole 11-7, one end of the second sealing member abuts against the connecting member 11, and the other end abuts against the first housing 1 to seal the connection between the connecting member 11 and the first housing 1, thereby preventing water from entering the housing from the relief hole.

[0066] The second sealing member can be a sealing ring provided around the through hole 11-7. The first sealing member can be a sealing ring made of rubber or plastic, and the like. Those skilled in the art can determine according to actual conditions, which is not specifically limited herein.

[0067] In one example, a second sealing groove 11-2 is provided around the circumference of the transmission shaft 10 at one end of the connecting member 11 facing the housing; and / or, a second sealing groove 11-2 is provided around the circumference of the transmission shaft 10 at one end of the housing facing the connecting member 11; wherein the second sealing member is provided in the second sealing groove 11-2.

[0068] As shown in Figure 2 and Figure 3 In this example, the connecting member 11 is provided with a second sealing groove 11-2 at one end facing the first housing 1, and the second sealing groove 11-2 is provided around the circumference of the transmission shaft 10, or in other words, the second sealing groove 11-2 is provided around the circumference of the through hole 11-7. The second sealing member is provided in the second sealing groove 11-2, thereby limiting the movement of the second sealing member to maintain the stability of the first sealing member, thereby achieving stable sealing effect.

[0069] And, by setting the second sealing groove 11-2, the second sealing member is set in the second sealing groove 11-2 during installation, and the second sealing member can be positioned to facilitate installation.

[0070] In this example, the second sealing groove 11-2 can also be provided on the housing. For example, the first housing has a second sealing groove 11-2 provided around the circumference of the transmission shaft 10 at one end of the connecting member 11. The second sealing member is provided in the second sealing groove 11-2, which also serves to limit the second sealing member.

[0071] Among them, the second sealing groove 11-2 can be provided with multiple, each of the second sealing groove 11-2 is provided with a second sealing member to improve the sealing effect. For example, a plurality of second sealing grooves 11-2 are arranged in a concentric structure on the connecting member 11, or they can also be arranged on the first housing 1, or they can also be arranged on the first housing 1 and the connecting member 11 respectively.

[0072] Of course, the second sealing groove 11-2 is not limited to the above embodiments, and those skilled in the art can set it according to the actual situation.

[0073] In one example, the connecting member 11 has a first connecting portion 11-3 at one end facing the housing, and the first connecting portion 11-3 is arranged around the outer periphery of the second sealing groove 11-2.

[0074] As shown in Figures 2 to 4 The connecting member 11 has a first connecting portion 11-3 at one end facing the first housing 1, and the first connecting portion 11-3 is arranged around the outer periphery of the second sealing groove 11-2, so as to avoid water from the first connecting portion 11-3 into the housing.

[0075] For example, the first connecting portion 11-3 can be fastened to the first housing 1 by screws or bolts. That is, the first connecting portion 11-3 is provided with a plurality of first connecting holes 11-1, which are arranged at intervals along the circumference of the second sealing groove 11-2. One end of the bolt is inserted into the first connecting hole 11-1 and screwed into the first housing 1, thereby fixing the connecting member 11 to the first housing 1. Alternatively, the first connecting portion 11-3 can be connected to the first housing 1 by clamping or welding, and those skilled in the art can determine it according to the actual situation, which is not specifically limited here.

[0076] Among them, the first connecting portion 11-3 is uniformly provided with four first connecting holes 11-1, or it can also be provided with three or five, etc., and those skilled in the art can determine it according to the actual situation, which is not specifically limited here.

[0077] The first connecting part 11-3 can be a disc structure, with the disc arranged around the second sealing groove 11-2. Alternatively, the first connecting part 11-3 can also be rectangular or elliptical, etc. Those skilled in the art can determine the structure according to the actual situation, and no specific limitation is made here.

[0078] like Figures 2 to 4 As shown, in this example, the end of the connector 11 opposite to the first connecting portion 11-3 is provided with a second connecting portion 11-6, which is used to connect to the valve seat. For example, the second connecting portion 11-6 can be fastened to the valve seat by screws or bolts. That is, the second connecting portion 11-6 is provided with a plurality of second connecting holes 11-4, which are spaced apart circumferentially along the through hole 11-7. One end of the bolt is passed through the second connecting hole 11-4 and screwed to the valve seat, thereby fixing the connector 11 to the valve seat. Alternatively, the second connecting portion 11-6 can also be connected to the valve seat by snap-fit ​​or welding, etc., as can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0079] The second connecting part 11-6 may have two first connecting holes 11-1 symmetrically arranged, or it may have three or four, etc. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0080] In one example, one of the connector 11 and the valve seat is provided with a first protrusion 11-5, and the other is provided with a first recess that engages with the first protrusion 11-5.

[0081] like Figure 3 As shown, the connector 11 has a first protrusion 11-5 at one end facing the valve seat, and the valve seat has a first recess that mates with the first protrusion 11-5. During installation, the first protrusion 11-5 can be fitted into the first recess, thereby positioning the connector 11 so that it can be fixedly connected by the second connecting part 11-6.

[0082] In this example, the first protrusion 11-5 can also be disposed on the valve seat, and the connector 11 is provided with a first recess that mates with the first protrusion 11-5. During installation, the first protrusion 11-5 can be embedded in the first recess, thereby positioning the connector 11 to facilitate a fixed connection via the second connecting part 11-6. Of course, the arrangement of the first protrusion 11-5 10-1 and the first recess can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0083] In one example, a first sealed cavity is provided inside the housing, and the actuator 9 is installed inside the first sealed cavity.

[0084] The first sealing cavity is arranged in the shell, and the actuator 9 is arranged in the first sealing cavity, so that water entering the shell cannot enter the actuator 9 to damage the circuit.

[0085] In this example, as shown in Figure 1 The shell includes a first shell 1 and a first sealing shell 5 connected to the inner wall of the first shell 1 to form the first sealing cavity. One end of the connecting piece 11 is connected to the first shell 1, and one end of the transmission shaft 10 penetrates the first shell 1 to be connected to the actuator 9.

[0086] The open end of the first sealing shell 5 is sealingly connected to the inner wall of the first shell 1 to form the first sealing cavity. A sealing ring or the like structure can be arranged between the first sealing shell 5 and the inner wall of the first shell 1 to improve the sealing performance. The actuator 9 is arranged in the first sealing cavity, so that water entering the shell cannot enter the actuator 9 to damage the circuit.

[0087] In one example, the shell includes a second shell 2, and one of the first shell 1 and the second shell 2 is provided with a second protrusion, and the other is provided with a second recess matched with the second protrusion.

[0088] As shown in Figure 1 The shell further includes a second shell 2, and the first shell 1 is sealingly connected to the second shell 2. The first sealing shell 5 forms the first sealing cavity with the inner wall of the first shell 1, thereby achieving double sealing to improve the sealing effect.

[0089] For example, the first shell 1 is provided with a second protrusion at one end facing the second shell 2, and the second shell 2 is provided with a second recess matched with the second protrusion. During installation, the second protrusion can be embedded in the second recess, thereby improving the sealing effect between the first shell 1 and the second shell 2. At the same time, the first shell 1 can also be positioned to facilitate the fixed connection of the first shell 1 and the second shell 2.

[0090] In this example, the second protrusion can also be arranged on the second shell 2, and the first shell 1 is provided with a second recess matched with the second protrusion. During installation, the second protrusion can be embedded in the second recess, thereby positioning the first shell 1 to facilitate the fixed connection of the first shell 1 and the second shell 2.

[0091] Of course, the arrangement of the second protrusion and the second recess can be determined by the person skilled in the art according to the actual situation, and is not limited here.

[0092] In this example, the second recess is provided with a third sealing element, and the second protrusion abuts against the third sealing element. By providing the third sealing element in the second recess, the sealing effect can be further improved. The first sealing element can be a sealing ring made of rubber or plastic, or the like. The skilled person can determine the actual material according to the actual situation, which is not specifically limited herein.

[0093] In this example, the first housing 1 and the second housing 2 can be fixedly connected by screws or bolts, or can be fixedly connected by clamping or the like. The skilled person can determine the actual situation, which is not specifically limited herein.

[0094] In one example, the valve device further comprises a circuit board, and the housing is provided with a second sealing cavity, and the circuit board is arranged in the second sealing cavity.

[0095] As shown in Figure 1 , the housing is provided with a second sealing shell 3 and a third sealing shell 4, and the open end of the second sealing shell 3 and the open end of the third sealing shell 4 are sealingly connected to form a second sealing cavity, and the circuit board is arranged in the second sealing cavity. For example, the second sealing shell 3 and the third sealing shell 4 can be ultrasonically welded together.

[0096] In this example, the circuit board can be electrically connected to the actuator 9 to control the operation of the actuator 9. The third sealing shell 4 can be transparent glass, and the second housing 2 is provided with an observation port for observing the internal condition of the circuit board, facilitating maintenance operation. The observation port can be sealed by an acrylic plate, which is a transparent glass plate.

[0097] In one example, the valve device further comprises a power supply assembly 8, which is detachably mounted on the housing, and the power supply assembly 8 is electrically connected to the actuator 9.

[0098] As shown in Figure 1 , the valve device further comprises a power supply assembly 8, which is detachably mounted on the outer wall of the housing, and the power supply assembly 8 is electrically connected to the actuator 9 to provide power for the actuator 9. By externally connecting the power supply assembly 8 to the housing, it is convenient for replacement and maintenance, etc.

[0099] As shown in Figures 7 to 9 , the power supply assembly 8 comprises a power supply shell 7, and a battery is mounted in the power supply shell 7. The open end of the power supply cover 6 is provided with a power supply cover 6. The open end of the power supply shell 7 is provided with a second welding groove 7-2, and the power supply cover 6 is correspondingly provided with a first welding groove 6-1, and the power supply cover 6 and the power supply shell 7 can be fixedly connected by ultrasonic welding, thereby achieving the effect of waterproof and moisture-proof.

[0100] In this example, as shown in Figure 8As shown, the inner wall of the power supply shell 7 is provided with reinforcing ribs 7-3, which has improved the strength of the power supply shell 7 and avoided damaging the power supply shell 7 during welding. The reinforcing ribs 7-3 can be provided in multiple rows, and the multiple reinforcing ribs 7-3 are arranged on the inner wall of the power supply shell 7 at intervals to further improve the strength of the power supply shell 7.

[0101] In this example, as shown in Figure 7 The power supply shell 7 can be fixedly connected to the shell by screws or bolts and the like fasteners. The outer wall of the power supply shell 7 is provided with a connecting plate, and the connecting plate is provided with a third connecting hole 7-1. The fasteners are arranged in the third connecting hole 7-1 and screwed to the shell, thereby fixing the power supply shell 7 to the shell. The connecting plate can be provided in multiple, for example, can be symmetrically arranged on both sides of the power supply shell 7, or can be provided in three or four, etc., which can be determined by those skilled in the art according to the actual situation, and is not limited here.

[0102] The above embodiments focus on the differences between the various embodiments, and the different optimization features between the various embodiments can be combined to form a more optimal embodiment without contradiction. In view of the brevity of the text, further description is omitted here.

[0103] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A valve device, characterized by The utility model relates to a valve drive device, comprising: a housing; an actuator installed in the housing; a connecting assembly comprising a connecting piece and a transmission shaft, one end of the connecting piece being connected to the housing and the other end being connected to a valve seat, the transmission shaft being arranged through the connecting piece, one end of the transmission shaft being connected to an output end of the actuator and the other end being connected to a valve core, the actuator being capable of driving the valve core to open or close the valve seat through the transmission shaft; wherein a first sealing member is arranged between the transmission shaft and the connecting piece.

2. The valve device according to claim 1, characterized in that The connecting piece is provided with a through hole, the transmission shaft is arranged through the through hole, and a first sealing groove is arranged on the inner wall of the through hole around the circumference of the transmission shaft; and / or, the transmission shaft is provided with a first sealing groove in the circumferential direction; wherein the first sealing member is arranged in the first sealing groove.

3. The valve device of claim 1, wherein A second sealing member is arranged between the connecting piece and the housing.

4. The valve device of claim 3, wherein An end of the connecting piece towards the housing is provided with a second sealing groove around the circumference of the transmission shaft; and / or, an end of the housing towards the connecting piece is provided with a second sealing groove around the circumference of the transmission shaft; wherein the second sealing member is arranged in the second sealing groove.

5. The valve device of claim 4, wherein An end of the connecting piece towards the housing is provided with a first connecting portion around the outer circumference of the second sealing groove.

6. The valve device of claim 1, wherein One of the connecting piece and the valve seat is provided with a first protrusion, and the other is provided with a first recess matched with the first protrusion.

7. The valve device of claim 1, wherein A first sealing cavity is arranged in the housing, and the actuator is installed in the first sealing cavity.

8. The valve device of claim 7, wherein The housing comprises a first housing and a first sealing shell, the first sealing shell being connected to the inner wall of the first housing to form the first sealing cavity, one end of the connecting piece being connected to the first housing, and one end of the transmission shaft being arranged through the first housing to be connected to the actuator.

9. The valve device of claim 8, wherein The housing comprises a second housing, one of the first housing and the second housing being provided with a second protrusion and the other being provided with a second recess matched with the second protrusion.

10. The valve device of claim 9, wherein A third sealing member is arranged in the second recess, and the second protrusion abuts against the third sealing member.

11. The valve device of claim 1, wherein Further comprising a circuit board, a second sealing cavity is arranged in the housing, and the circuit board is arranged in the second sealing cavity.

12. The valve device of claim 1, wherein Further comprising a power supply assembly, the power supply assembly being detachably installed in the housing and electrically connected to the actuator.

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