CN111255938A - an electric valve - Google Patents

Abstract

An electric valve, the electric valve includes a mounting plate and a mounting flange, the mounting plate includes a main body and a support foot, the support foot includes a mounting surface facing the side of the mounting flange, the mounting flange abuts the mounting surface of the support foot, and the mounting plate also includes a mounting surface facing the mounting flange side. On the first side of the flange side, the main body further includes a plurality of first fixing holes, the housing includes a plurality of first protrusions, a part of the first protrusions penetrates a part of the first fixing holes, and the first protrusions include a plurality of first protrusions. The diameter of the fixing part is larger than the inner diameter of the first fixing hole, the fixing part is located between the main body and the mounting flange, the height difference between the mounting surface and the first side is greater than the protrusion height of the fixing part relative to the first side, the fixing part Keeping a certain distance from the mounting flange can reduce the risk of damage to the fixed part when the fixed part abuts against the mounting flange during installation.

Description

an electric valve

technical field

The invention relates to the technical field of flow regulation, in particular to an electric valve.

Background technique

Electric valves can be widely used in fluid medium pipeline systems to adjust the flow of medium. Taking the application of electric valves in the automotive field as an example, electric valves can be used in air conditioning systems, engine cooling systems or battery cooling systems. As shown in FIG. 22 , the electric valve includes a coil assembly 221 . When manufacturing the electric valve, the coil assembly 221 needs to be mounted and fixed to the valve body of the electric valve through the mounting plate 4 .

During installation, a part of the fixing part 226 of the coil assembly 221 is fixed with the mounting plate 4 , and a part of the fixing part 226 is abutted with the valve body, so as to prevent the fixing part fixed with the mounting plate 4 from contacting the valve body and being damaged.

SUMMARY OF THE INVENTION

The technical solution of the present invention provides an electric valve, the electric valve includes a stator assembly, a sleeve and a rotor part, the stator assembly is sleeved on the sleeve, the stator assembly includes a housing and a coil assembly, and is characterized by: In that, the electric valve further includes a mounting plate and a mounting flange;

The mounting plate includes a main body and a support foot, the support foot includes a mounting surface facing the side of the mounting flange, the mounting flange abuts the mounting surface of the support foot, and the mounting plate further includes a first side facing the mounting flange side. one side;

The main body further includes a plurality of first fixing holes, the housing includes a plurality of first protruding parts, a part of the first protruding part penetrates a part of the first fixing holes, and the first protruding part includes a fixing hole. The diameter of the fixing portion is larger than the inner diameter of the first fixing hole, the fixing portion is located between the main body and the mounting flange, and the height difference between the mounting surface and the first side surface is larger than the fixing portion The protrusion height of the part relative to the first side surface, and a certain distance is maintained between the fixed part and the mounting flange. In the electric valve provided in this solution, the height difference between the mounting surface and the first side surface is greater than the height of the protrusion of the fixing portion relative to the first side surface, that is, a certain distance is maintained between the fixing portion and the mounting flange, which can reduce Risk of damage to the fixed part when the fixed part abuts the mounting flange during installation.

Description of drawings

Figure 1 shows a schematic front view of an embodiment of the present invention;

Figure 2 shows a schematic cross-sectional view of the electric valve shown in Figure 1;

FIG. 3 shows a schematic perspective view of the cover of the electric valve shown in FIG. 2;

FIG. 4 shows a schematic cross-sectional view of the cover of the electric valve shown in FIG. 2 along the line B-B;

Fig. 5 shows a schematic cross-sectional view of the rotor component of the electric valve shown in Fig. 2;

FIG. 6 shows a schematic front view of the rod component of the electric valve shown in FIG. 2;

Figure 7 shows a schematic left side view of the lever member shown in Figure 6;

FIG. 8 shows a schematic perspective view of the valve cover of the electric valve shown in FIG. 2;

Figure 9 shows a schematic side view of the stem member of another embodiment of the electric valve;

Figure 10 shows a schematic cross-sectional view of the rod member shown in Figure 9 along the C-C line;

11 shows a schematic cross-sectional view of the cover of another embodiment of the electric valve along the line B-B;

Figure 12 shows a schematic left side view of the cover shown in Figure 11;

Fig. 13 shows a three-dimensional schematic view of the mounting flange of the electric valve shown in Fig. 2;

Figure 14 shows a schematic perspective view of a portion of the electric valve shown in Figure 2;

Fig. 15 shows a perspective view of the mounting plate of the electric valve shown in Fig. 2;

Figure 16 shows a front view of the mounting plate of the electric valve shown in Figure 2;

Fig. 17 shows a three-dimensional schematic view of the valve housing of the electric valve shown in Fig. 2;

Figure 18 shows a schematic assembly diagram of a portion of the electric valve shown in Figure 2;

Figure 19 shows a schematic perspective view of a portion of yet another embodiment of an electric valve;

Figure 20 shows a schematic perspective view of a portion of the rotor assembly shown in Figure 5;

FIG. 21 shows a schematic cross-sectional view of the rotor component shown in FIG. 5 along the line D-D;

Figure 22 shows a schematic perspective view of a portion of a conventional electric valve;

FIG. 23 shows a partial enlarged schematic view of the electric valve shown in FIG. 2 .

Detailed ways

As shown in FIGS. 1 and 2 , the electric valve includes a rotor member 4 , a rod assembly 10 and a cover 3 . As shown in FIG. 6 , the rotor part 4 includes an internal thread part 402 , the rod assembly 10 includes a rod part 5 , the rod part 5 includes an external thread part 505 , and the internal thread part 402 of the rotor part 4 engages with the external thread part 505 of the rod part 5 , and can be The rotary motion of the rotor part 4 is converted into a linear motion of the rod part 5 . The male screw portion 505 is provided on the outer peripheral portion of the rod member 5 .

Specifically, as shown in FIGS. 5 , 20 and 21 , the rotor part 4 includes a magnet 401 and a nut 403 . The nut 403 is fixed to the magnet 401 located on the outer periphery of the nut or has an integral structure. The magnet 401 may be substantially cylindrical, and the nut 403 may be substantially cylindrical. The magnet 401 includes a convex portion 4011 protruding toward the nut 403 , the nut 403 includes a concave portion 4031 recessed outside the nut, and the convex portion 4011 is embedded in the concave portion 4031 , so that the magnet 401 and the nut 403 are more firmly fixed. The female screw portion 402 is located on the inner peripheral side of the nut 403 . This structure can reduce the risk of relative slippage between the magnet 401 and the nut 403 when the rotor part 4 is impacted, and is especially reinforced in the axial and circumferential directions relative to the rod part 5 .

The nut 403 can be made of plastic material, the nut 403 can be fixed with the magnet 401 during injection molding, and the nut 403 and the magnet 401 can also be integrated. Since the eccentric force of the rotor part 4 relative to the rod part 5 is mostly loaded on the threaded part, the nut 403 can also be made of metal powder, which can make the inner threaded part 402 have a longer life.

As shown in FIG. 2 , the electric valve further includes a valve cover 6 and a sleeve 11. A first cavity 8 is formed in the sleeve 11. A part of the rotor part 4 is located in the first cavity 8. The first cavity 8 is substantially cylindrical. One end of the sleeve 11 is fixed with the cover 3 or has an integral structure. In an embodiment of the present invention, one end of the sleeve 11 is fixed to the cover 3 and the connection is sealed, and the other end of the sleeve 11 is fixed to the valve cover 6 and the connection is sealed.

As shown in FIGS. 2 to 8 , a second cavity 306 is formed in the cover 3 , and one end of the rod assembly 10 extends into the second cavity 306 . The valve cover 6 includes a shaft hole 62 through which the other end of the rod assembly 10 passes.

The inner wall corresponding to the sliding cavity 306 includes a matching wall portion 302 and a limiting wall portion 303 extending along the length direction of the rod assembly. One end of the rod assembly 10 includes a first matching portion 701 and a special-shaped matching portion 702. The first matching portion 701 and the matching wall The portion 302 is a slip fit. At least a part of the special-shaped matching part 702 has a different distance from the first matching part 701 relative to the central axis of the rod assembly, and at least a part of the special-shaped matching part 702 is slidably matched with the limiting wall part 702 . It should be noted that the central axis of the lever assembly refers to the rotation axis of the lever member 5 .

Through the cooperation between the first matching portion 701 and the matching wall portion 302 , one end of the rod assembly 10 can be radially limited relative to the rod assembly 10 . to the limit. Thus, the rotor part 4 is also radially restrained with respect to the rod assembly. This solution obtains the radial limit of the rotor part 4 and the rod assembly 10 with a simple structure, and can save the ball bearing. At the same time, through the cooperation of the special-shaped matching portion 702 and the limiting wall portion 303 , one end of the rod assembly 10 can obtain a circumferential position limit relative to the rod assembly 10 , that is, the function of preventing rotation.

In this embodiment, as shown in FIGS. 6 and 7 , the rod assembly 10 further includes a limit block 7 whose maximum outer diameter is larger than the external thread portion 505 of the rod member 5 , and the limit block 7 is fixed to one end of the rod member 5 or is As an integral structure, the limiting block 7 extends into the second cavity 306 of the cover 3 . The matching wall portion 302 and the limiting wall portion 303 are located on the inner peripheral portion of the second cavity 306 , and the limiting block 7 can slide in the second cavity 306 along the length direction of the rod assembly 10 .

The limiting block 7 may further include a mounting hole 704 into which a part of the end of the rod member 5 close to the second cavity 306 is inserted. There is an interference fit between the rod member 5 and the mounting hole 704 . The limiting block 7 and the rod member 5 can also be fixed by other means such as welding.

As shown in FIG. 4 , the cover 3 further includes a stepped surface 304 , and the stepped surface 304 is located at the bottom of the second cavity 306 . When the rod assembly 10 moves to the extreme topmost position, the limiting block 7 abuts against the stepped surface 304, and the stepped surface 304 can play a limiting role.

As shown in FIGS. 3 , 4 , 6 and 7 , in an embodiment of the electric valve, the limit block 7 includes a first matching portion 701 and a special-shaped matching portion 702 located on the outer periphery of the limit block. The limit wall The inner diameter of at least a part of the portion 303 is smaller than the minimum inner diameter of the matching wall portion 302 , so that the limiting block 7 is circumferentially limited in the second cavity 306 . That is, the cross-section of the limiting block 7 is substantially "D"-shaped, which can limit the rotation of the rod assembly 10 . The special-shaped fitting portion 702 may also be symmetrically arranged relative to the rod member 5 , so that the force of the limiting block 7 is more uniform.

As shown in FIG. 9 to FIG. 12 , in another embodiment of the electric valve, the limit block 7 includes a first matching portion 701 and a special-shaped matching portion 702 located on the outer periphery of the limit block 7 , at least a part of the special-shaped matching portion 702 It extends into the limiting wall portion 303 , so that the limiting block 7 is circumferentially limited in the second cavity 306 . Specifically, the limiting wall portion 303 is substantially in the shape of a groove, the limiting block 7 may include a pin 705 penetrating the limiting block 7 in the radial direction of the rod assembly, and the special-shaped fitting portion 702 is a part of the pin 705 .

As shown in FIGS. 2 and 4 , the cover 3 may further include a blocking member 307 , and the blocking member 307 closes the open end 308 of the cover 3 away from the rod assembly. In addition, the cover 3 further includes a first pressure relief hole 305 communicating with the second cavity 306 and the first cavity 8 , and the first pressure relief hole 305 is located between the rod assembly and the blocking member. The first pressure relief hole 305 can reduce the pressure difference between the two sides of the limiting block 7 , which is beneficial to the axial movement of the rod assembly 10 .

As shown in FIG. 2 , FIG. 3 and FIG. 8 , the cover 3 includes a rotor upper limit portion 301 , and the valve cover 6 includes a rotor lower limit portion 61 .

The electric valve further includes a plurality of spacers 12 . The spacers 12 are disposed between the rotor upper limit portion 301 and the rotor part 4 , and the spacers 12 are also disposed between the rotor lower limit part 61 and the rotor part 4 . The rotor upper limit portion 301 and the rotor lower limit portion 61 can limit the rotor component 4 in the axial direction of the rod assembly. The gasket 12 can reduce the friction force between the rotor part 4 and the rotor upper limit part 301 and the friction force between the rotor part 4 and the rotor lower limit part 61 , reduce the wear of the rotor part 4 and improve the life of the rotor part. The gasket 12 can be made of graphite material, and can also be made of other lubricating materials such as polytetrafluoroethylene.

In this embodiment, both the rotor upper limit portion and the rotor lower limit portion can be set in a rotationally symmetrical shape, so that the axial force of the rotor component 4 is relatively uniform. In addition, in the axial direction of the rod part, the axial length of the nut 403 of the rotor part 4 is smaller than the axial length of the magnet 401, a part of the cover 3 protrudes into the magnet 401, and one end of the cover 3 protruding into the magnet includes: In the rotor upper limit portion 301 , a part of the valve cover 6 extends into the magnet 401 , and an end portion of the valve cover 6 that extends into the magnet 401 includes the rotor lower limit portion 61 . The length of the rod assembly 10 or the first cavity 8 can be reduced, thereby reducing the size of the electric valve.

In addition, as shown in FIG. 5 , in the radial direction of the rod member 5 , the spacer 12 is closer to the rod member 5 than the main body of the magnet 401 , so the frictional moment of the spacer 12 to the rotation of the rotor member 4 around the rod member 5 is relatively small. Small, it is favorable for the rotor part 4 to rotate against the friction torque. Preferably, the radial dimension of the washer 12 can be further reduced so that the washer 12 only contacts with the nut 402 , which further reduces the friction torque of the washer 12 to the rotation of the rotor part 4 around the rod part 5 .

The electric valve also includes a stator assembly, the stator assembly includes a casing 2 and a coil assembly 1, the casing 2 wraps the coil assembly 1, and the coil assembly and the casing 2 are fixed or integrally formed by injection molding. The coil assembly 1 is sleeved on the sleeve 11 .

The electric valve also includes a mounting plate 9 and a mounting flange 13 , and the mounting plate 9 is fixed to the housing 2 . As shown in FIGS. 13 to 16 , the mounting plate 9 includes a main body 901 and a support leg 903 . The support leg 903 includes a mounting surface 9031 facing the mounting flange side. The mounting flange 13 abuts against the mounting surface 9031 of the support leg 903 and can be screwed through. fixed in other ways. The mounting plate 9 also includes a first side surface 906 facing the mounting flange side, and the first side surface 906 located on the main body 901 is facing the mounting flange 13 .

The main body 901 further includes a plurality of first fixing holes 902 , the housing 2 includes a plurality of first protrusions 202 and a plurality of second protrusions 203 , a part of the first protrusions 202 penetrates a part of the first fixing holes 902 , A part of the second protrusion 203 penetrates through another part of the first fixing hole 902 and then contacts with the mounting flange 13 or maintains a certain distance. The first raised portion 202 includes a fixing portion, the fixing portion is located between the main body 901 and the mounting flange 13, the diameter of the fixing portion is larger than the inner diameter of the first fixing hole 902, and the first raised portion and/or the second raised portion can be It is a thermoplastic material, and the fixing part can be realized by welding or heating and melting. The height of the second protruding portion 203 protruding from the first side surface 906 is greater than the height of the fixing portion protruding from the first side surface 906 . The first protruding portion 202 and the second protruding portion 203 are arranged at intervals.

The height difference between the mounting surface 9031 of the support foot 903 and the first side surface is greater than the height of the protrusion of the fixing portion relative to the first side surface 906 , that is, a certain distance is maintained between the fixing portion and the mounting flange 13 , and the second raised portion 203 It can also further play a limiting role, which can reduce the damage of the fixed part when the fixed part abuts against the installation flange 13 during installation or use.

The supporting feet 903 may be two or more than two, and the supporting feet 903 may be arranged symmetrically with respect to the main body 901 , which can make the fixing of the supporting feet 903 and the mounting flange 13 more stable. The feet 903 are located on the outer periphery of the main body 901 . As shown in FIG. 13 and FIG. 15 , the mounting flange 13 further includes a third fixing hole 134 , and the fourth fixing hole 904 located in the support leg 903 is screwed to the third fixing hole 134 . The mounting plate 9 further includes a bent portion 905 , and the support leg 903 is connected to the main body 901 through the bent portion 905 , and can be manufactured by stamping when the mounting plate 9 is thin.

As shown in FIG. 19 , in another embodiment of the electric valve, the electric valve further includes a diaphragm 37 , and the diaphragm 37 is located between the main body 901 and the mounting flange 13 . The thickness of the partition plate 37 is greater than the height of the fixed part protruding from the first side 906 , the main body 901 is in contact with the partition plate 37 , the mounting flange 13 is in contact with the partition plate 37 , and the partition plate is also provided with an accommodating hole 371 , the accommodating hole 371 The inner diameter is larger than the outer diameter of the fixing portion, and the fixing portion and a part of the second protruding portion 203 are located in the accommodating hole 371 . The partition plate 37 can play a limiting role, which can further reduce the damage of the fixed part when the fixed part abuts against the installation flange during installation.

The mounting flange 13 includes a flange hole 132 , and the flange hole 132 may be located at the center of the mounting flange 13 . A part of the valve cover 6 is inserted into the flange hole 132 , the valve cover 6 is fixed with the mounting flange 13 and the connection is sealed. In addition, the surface of the mounting flange 13 opposite to the mounting plate 9 may be substantially flat.

As shown in FIG. 13 , FIG. 15 , FIG. 17 and FIG. 18 , the electric valve further includes a valve housing 31 and a screw 15 , and the valve housing 31 includes a valve cavity 30 . The valve housing 31 includes a second fixing hole 319 , and the screws 15 pass through the fourth fixing hole 904 , the third fixing hole 134 and the second fixing hole 319 in sequence to fix the mounting plate 9 , the mounting flange 13 and the valve housing 31 . The mounting flange 13 and the valve housing 31 may be an integral structure.

18 and 19, the electric valve further includes a guide portion 14, the guide portion 14 includes a second pressure relief hole penetrating both ends of the guide portion, the valve cover 6 includes a third pressure relief hole 63 penetrating both ends of the valve cover 6, the third pressure relief hole 63 The pressure hole 63 communicates with the second pressure relief hole. The third pressure relief hole 63 and the second pressure relief hole can communicate with the first cavity 8 and the valve cavity 30 , that is, the fluid in the valve cavity 30 can directly enter the first cavity 8 . It may not be necessary to provide a dynamic sealing structure between the rod member 5 and the shaft hole 63 . A part of the guide part 14 can be inserted into the flange hole 132 of the flange, and another part of the guide part 14 can be inserted into the valve housing 31 .

2 and 17, the electric valve further includes an O-ring 19, the valve housing 31 further includes a second groove 312 surrounding the valve cavity 30, the O-ring 19 is arranged in the second groove 312, and the O-ring between the mounting flange 13 and the valve housing 31 . And the O-ring is in a compressed state, which seals the valve cavity 30 and the first cavity 8 to reduce the leakage of fluid from the valve cavity 30 and the first cavity 8 to the outside.

As shown in FIG. 2 , the electric valve further includes a valve core assembly 20 , and the valve core assembly 20 includes a spring 23 , a valve shaft 24 , a piston assembly 25 , and a spring preload ring 26 . The piston assembly 25 is slidable along the valve shaft 24 . The valve core assembly 20 further includes a cylindrical body 21 , and at least a part of the outer circumference of the cylindrical body 21 is slidably fitted with the guide portion 14 .

In this embodiment, as shown in FIG. 2 , the upper end of the valve core assembly 20 is connected with the rod assembly 10 in a driving manner. Compared with a whole long rod, the rod is divided into two sections, the rod part 5 and the valve shaft 24, for turning processing, and the length of each section is short, which is beneficial to improve the machining accuracy of the rod. The mounting flange 13 , the valve cover 6 and the guide portion 14 can all be made of metal.

In yet another embodiment of the electric valve, the rod assembly 10 and the valve shaft 24 can be an integral structure, and there is no need to provide a transmission structure. Simple structure and easy installation.

The valve housing 31 includes a first passage 32 and a second passage 34 . The first passage 32 communicates with a part of the valve cavity 30 , and the second passage 34 communicates with another part of the valve cavity 30 . The valve housing 31 can be made of plastic.

As shown in FIG. 23 , the valve housing 31 includes a first valve seat 317 , and the first valve seat 317 is located between the valve cavity 30 and the first passage 32 . The piston assembly 25 may be in contact with the first valve seat 317 . The valve housing 31 further includes a stop portion 318 , and the valve core assembly 20 further includes a lower limit portion 27 . The lower limit portion 27 can abut against the stop portion 318 . Before the sealing layer 251 of the piston assembly 25 comes into contact with the first valve seat 317 , the distance between the lower end of the lower limit portion 27 and the lower end of the sealing layer 251 of the piston assembly 25 is greater than the distance between the upper end of the first valve seat 317 and the upper end of the stop portion 318 the distance. When the sealing layer 251 of the piston assembly 25 is worn and thinned, the piston assembly 25 can still be in contact with the first valve seat 317 and seal the first passage 32 . In addition, the lower limit portion 27 is disposed on the valve core assembly 20 and is closer to the first valve seat 317 than the rod member 5 , so that the positioning of the valve core assembly 20 is more precise. It should be noted that the “upper end” refers to the end away from the first valve seat 317 , and the “lower end” refers to the end close to the first valve seat 317 .

The operation of the electric valve is described with reference to FIGS. 2 and 23 . When the rotor part 4 rotates forwardly, the rod assembly 10 pushes the valve core assembly 20 to move downward, and the piston assembly 25 descends with the descent of the valve core assembly 20 until the piston assembly 25 contacts the first valve seat 317 . At this time, the rotor part 4 can still continue to rotate in the forward direction and the valve core assembly 20 further descends with the rod assembly 10 until the lower limit part 27 of the valve core assembly 20 abuts against the stop part 318 of the valve housing, and the valve shaft 24 The descending process stops. At this time, the piston assembly 25 is still in a position abutting against the first valve seat 317 , and the spring 23 is compressed by a length that continues to descend more than the original state. The lower limit portion 27 can limit the length of the spring 23 that is more compressed, and can prevent the piston assembly 25 from being over-pressed by the first valve seat 317 , thereby reducing the risk of damage to the piston assembly 25 . In addition, the spring 23 can play a buffering role when the piston assembly 25 is in contact with the first valve seat 317 .

Afterwards, when the rotor part 4 rotates in the reverse direction, the rod assembly 10 pulls the valve core assembly 20 to move upward, and the piston assembly 25 connected to the valve shaft moves in a direction away from the first valve seat 317, so that the first passage and the valve cavity can be connected 30 connections. In addition, when the upper end of the rod assembly 10 abuts against the stepped surface 304, the rise of the valve core assembly 20 stops, and the electric valve is in a fully open state. Flow control from the first passage 32 to the second passage 34 may be performed by controlling the position of the piston assembly 25 by the rotor member 4 .

As shown in FIG. 2 , the electric valve further includes a second casing 35 and a circuit board 36 . The second casing 35 is fixed to the casing 2 , the second casing 35 includes an inner cavity 351 , and the circuit board 36 is arranged in the inner cavity 351 . The circuit board 36 is electrically connected to the coil assembly 1 . Both the housing 2 and the second housing 35 can be made of plastic material and can be manufactured by injection molding.

It should be noted that the above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention. Although the present specification has been described in detail with reference to the above-mentioned embodiments, it should be understood by those of ordinary skill in the art that those skilled in the art can still combine, modify or modify the present invention. Equivalent replacement, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims (10)

1. An electric valve comprising a stator assembly, a sleeve (11) and a rotor part (4), characterized in that the stator assembly is sleeved on the sleeve (11), and the stator assembly comprising a housing (2) and a coil assembly (1), the electric valve further comprises a mounting plate (9) and a mounting flange (13); The mounting plate (9) includes a main body (901) and a support foot (903), the support foot (903) includes a mounting surface (9031) facing the mounting flange side, and the mounting flange (13) is connected to the support foot (903). 903) abutting the mounting surface (9031), the mounting plate (9) further comprises a first side surface (906) facing the mounting flange side; The main body (901) further includes a plurality of first fixing holes (902), the housing (2) includes a plurality of first protruding parts, and a part of the first protruding parts penetrates a part of the first fixing holes (902). 902), the first protruding portion includes a fixing portion, the diameter of the fixing portion is larger than the inner diameter of the first fixing hole, and the fixing portion is located between the main body (901) and the mounting flange (13) , the height difference between the mounting surface (9031) and the first side surface (906) is greater than the height of the protrusion of the fixing portion relative to the first side surface (906), and the distance between the fixing portion and the mounting flange (13) Keep your distance. 2. The electric valve according to claim 1, wherein the first housing further comprises a plurality of second protrusions (203), and a part of the second protrusions (203) penetrates another part The first fixing hole (902) is in contact with the mounting flange (13) or maintains a certain distance, and the height of the second raised portion protruding from the first side surface (906) is greater than the height of the fixing portion protruding from the first side surface. height, the first protruding portion and the second protruding portion are spaced apart. 3. The electric valve according to claim 1, wherein the first housing further comprises a plurality of second protruding parts (203), and a part of the second protruding parts penetrates another part of the first fixing part After the hole is in contact with the mounting flange (13) or keep a certain distance, the height of the second raised portion protruding from the first side (906) is greater than the height of the fixing portion protruding from the first side, the first The protruding portion and the second protruding portion are arranged at intervals; The electric valve further comprises a partition plate (37), the partition plate is located between the main body and the mounting flange, and the thickness of the partition plate is greater than the height of the fixing portion protruding from the first side surface (906), The main body is in contact with the partition plate, the mounting flange is in contact with the partition plate, and the partition plate is further provided with an accommodating hole (371), and the inner diameter of the accommodating hole is larger than that of the fixing portion The outer diameter of the fixed part and a part of the second convex part are located in the accommodating hole. 4. The electric valve according to claim 1, characterized in that, the coil assembly (1) is fixed with the first housing (2) or has an integral structure, and the first protruding portion (202) and /or the second raised portion (203) is made of thermoplastic material, and the fixing portion is formed by welding or heating and melting; There are a plurality of the supporting feet, the supporting feet (903) are located on the outer periphery of the main body (901), the supporting feet (903) are symmetrically arranged relative to the main body (902), and the fixing holes (902) are relative to the main body (902). 901) symmetrically arranged; The mounting plate (9) further includes a bent portion (905), and the support leg (903) is connected to the main body (901) through the bent portion (905). 5. The electric valve according to any one of claims 1-4, wherein the electric valve comprises a rod assembly (10) and a cover (3), and the coil assembly (1) is sleeved on the The sleeve (11), a first cavity (8) is formed in the sleeve, a part of the rotor part (4) is located in the first cavity (8), and one end of the sleeve (11) is connected to the first cavity (8). The cover (3) is fixed or has an integral structure, the rotor part (4) comprises an internal thread part (402), the rod assembly (10) comprises an external thread part (505), and the rotor part (4) The internal thread part of the rod assembly is engaged with the external thread part of the rod assembly (10); The electric valve includes a cover (3) and a valve cover (6). A second cavity (306) is formed in the cover (3), and one end of the rod assembly (10) extends into the second cavity (306). ), the inner wall corresponding to the sliding cavity (306) includes a matching wall portion (302) and a limiting wall portion (303) extending along the length direction of the rod assembly, and the rod assembly (10) extends into the first One end of the second cavity includes a first matching part (701) and a special-shaped matching part (702), the first matching part (701) slidingly fits with the matching wall part (302); At least a part of the distance from the first matching portion (701) relative to the central axis of the rod assembly is different, and the special-shaped matching portion (702) is slidably fitted with the limiting wall portion (303). 6 . The electric valve according to claim 5 , wherein the rod assembly ( 10 ) comprises a rod part ( 5 ) and a limit block ( 7 ), and the external thread part is provided on the rod part ( 5 ). 7 . ), the limiting block (7) is fixed with one end of the rod member (5) or has an integral structure, and the maximum outer diameter of the limiting block (7) is larger than the outer thread portion (505) the outer diameter; At least a part of the limiting wall portion (303) is protruded from the matching wall portion (302), and the limiting block (7) extends into the second cavity (306); The limiting block (7) includes the first matching portion (701) and a special-shaped matching portion (702) located on the outer periphery of the limiting block, and the limiting wall portion (303) and the special-shaped matching portion (702) In cooperation, the limiting block (7) is circumferentially limited in the second cavity (306). 7 . The electric valve according to claim 5 , wherein the rod assembly ( 10 ) comprises a rod part ( 5 ) and a limit block ( 7 ), and the external thread part is provided on the rod part ( 5 ). 8 . ), the limiting block (7) is fixed with one end of the rod member (5) or has an integral structure, and the maximum outer diameter of the limiting block (7) is larger than the outer diameter of the external thread portion (505). outer diameter; The limiting block (7) extends into the second cavity (306), and at least a part of the limiting wall portion (303) is recessed relative to the matching wall portion (302); The limiting block (7) includes the first matching portion (701) and a special-shaped matching portion (702) located on the outer periphery of the limiting block (7), and at least a part of the special-shaped matching portion (702) extends into the A limiting wall portion (303), the special-shaped fitting portion (702) and the limiting wall portion (303) are slidably fitted, so that the limiting block (7) is circumferentially limited to the second cavity (306) Inside. 8. The electric valve according to any one of claims 6 or 7, characterized in that the rotor part (4) comprises a nut (403) and a magnet (401), the nut (403) being connected to the outer periphery of the nut The magnet (401) of the nut (401) is fixed or an integral structure, the internal thread part is located on the inner peripheral side of the nut, and the magnet (401) includes a protrusion (4011) protruding toward the nut (403). , the nut (403) includes a concave portion (4031) recessed on the outside of the nut, and the protruding portion (4011) is embedded in the concave portion (4031). 9 . The electric valve according to claim 8 , wherein the electric valve further comprises a valve cover ( 6 ), and the other end of the sleeve ( 11 ) is fixed and connected to the valve cover ( 6 ). 10 . Sealing, a part of the cover (6) protrudes into the magnet (401), one end of the cover (3) protruding into the magnet includes a rotor upper limit part (301), the valve cover A part of the valve cover protrudes into the magnet, and one end of the valve cover protruding into the magnet includes a rotor lower limit part (61); The electric valve further comprises a plurality of spacers (12), the spacers (12) are arranged between the rotor upper limit portion (301) and the rotor component (4), and the rotor lower limit portion ( 61) The spacer (12) is arranged between the rotor part (4), and the material of the spacer (12) is graphite. 10. The electric valve according to claim 9, characterized in that, the electric valve further comprises a guide portion (14), and the guide portion (14) is fixed with the mounting flange (13); The electric valve further includes a valve core assembly (20), at least a part of the valve core assembly (20) slidingly fits with the guide portion; The guide portion (14) includes second pressure relief holes (143) penetrating both ends of the guide portion, and the valve cover (6) includes first pressure relief holes (63) penetrating both ends of the valve cover. The pressure relief hole (63) communicates with the second pressure relief hole (143).

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