Movable iron core type proportional valve

Abstract

The utility model discloses a movable iron core type proportional valve which comprises a valve body, a valve cavity and a valve port communicated with the valve cavity are arranged in the valve body, a plugging mechanism is arranged in the valve cavity, and the plugging mechanism is matched with the valve port in a plugging mode. At least one elastic piece is installed on the plugging mechanism, a sealing assembly is arranged on the plugging mechanism, and the elastic piece provides elastic force for the sealing assembly to move towards the valve port so as to improve the sealing performance of the sealing assembly and the valve port. The sealing performance of the valve port is improved, installation of electromagnetic valves at other positions can be reduced, the structure is simple, the overall size is reduced, the occupied space is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of proportional valves, in particular to a moving iron core type proportional valve. Background Art

[0002] In the prior art, the industry has requirements for the sealing of proportional valves. Therefore, the current solution is to install solenoid valves at the inlet and outlet of the proportional valve to ensure the sealing of both the inlet and outlet. However, the structure of installing two solenoid valves is complicated, the overall volume is large, the space occupied is large, and the cost is high. Therefore, it is very important to improve the sealing structure of the proportional valve. Summary of the invention

[0003] In view of the above-mentioned sealing problems of existing proportional valves, the present invention aims to provide a moving iron core type proportional valve, which improves the sealing requirements of the valve port and can reduce the installation of an electromagnetic valve in other positions. It has a simple structure, reduces the overall volume, reduces the occupied space, and reduces the cost.

[0004] The specific technical solutions are as follows:

[0005] A moving iron core type proportional valve, comprising: a valve body, wherein the valve body has a valve cavity and valve ports respectively connected to the valve cavity, wherein a blocking mechanism is provided in the valve cavity, and the blocking mechanism cooperates with the valve ports for blocking;

[0006] At least one elastic member is installed on the blocking mechanism, and a sealing assembly is provided on the blocking mechanism. The elastic member provides elastic force for the sealing assembly to move toward the valve port, so as to improve the sealing performance between the sealing assembly and the valve port.

[0007] In the above-mentioned moving iron core type proportional valve, the elastic member drives the blocking mechanism to press the sealing assembly against the valve port.

[0008] The above-mentioned moving iron core type proportional valve, wherein the sealing mechanism includes: a valve stem assembly and a balancing membrane, the valve stem assembly is provided with the sealing assembly, the sealing assembly cooperates with the valve port sealing, the inner periphery of the balancing membrane is sleeved on the valve stem assembly, and the outer periphery of the balancing membrane is installed on the valve body.

[0009] The above-mentioned moving iron core type proportional valve, wherein the sealing assembly comprises: a first sealing member;

[0010] The valve stem assembly includes: a valve stem, the first sealing member is installed on one end of the valve stem, one end of the elastic member is installed on one end of the valve stem, and the other end of the elastic member is against the inner wall of the valve body, and the elastic force of the elastic member is used to drive the first sealing member on the valve stem to press against the valve port.

[0011] In the above-mentioned moving iron core type proportional valve, a plurality of elastic members are installed on one end of the valve stem, the plurality of elastic members are distributed at equal intervals along the circumference of the valve stem, and the plurality of elastic members are respectively against the inner wall of the valve body.

[0012] The above-mentioned moving iron core type proportional valve, wherein the outer periphery of one end of the valve stem has a groove, the first sealing member is embedded in the groove, and the outer periphery of the first sealing member has a first inclined surface, and the first inclined surface cooperates with the valve port seal.

[0013] The above-mentioned moving iron core type proportional valve, among which, further includes: a fan, wherein the valve chamber is divided into a first valve chamber and a second valve chamber by the balance membrane, the first valve chamber is connected to the valve port, and the second valve chamber is connected to the fan, and the second valve chamber is inflated by the fan to provide the valve stem assembly with a force to compress the elastic member.

[0014] The above-mentioned moving iron core type proportional valve, wherein the sealing assembly comprises: a first sealing member and a second sealing member;

[0015] The valve stem assembly comprises:

[0016] A valve stem, wherein the first sealing member is mounted on one end of the valve stem, and the elastic member is sleeved on the valve stem;

[0017] The slide is slidably arranged on the valve stem, the second sealing member is installed on the slide, the elastic member is disposed between the valve stem and the slide, and the first sealing member cooperates with the valve port through the second sealing member.

[0018] In the above-mentioned moving iron core type proportional valve, the outer periphery of the valve stem has a convex ring, and one end of the elastic member abuts against the convex ring.

[0019] The above-mentioned moving iron core type proportional valve, wherein the inner wall of the valve body located at the valve port has an annular groove, the outer wall of the slide slides in the annular groove, and the second sealing member is limited between the slide and the annular groove;

[0020] The first sealing member is installed on one end of the valve stem, and the outer periphery of the first sealing member has a first inclined surface;

[0021] The inner periphery of the second sealing member has a second inclined surface, and the first inclined surface is in sealing cooperation with the second inclined surface;

[0022] A sealing ring is disposed between the outer periphery of the second sealing member and the inner wall of the valve port.

[0023] Compared with the prior art, the above technical solution has the following positive effects:

[0024] The utility model arranges an elastic member and a sealing assembly on the blocking mechanism, and the sealing assembly is pressed against the valve port by the elastic member to improve the sealing performance at the valve port, which can reduce the installation of an electromagnetic valve at another position, has a simple structure, reduces the overall volume, reduces the occupied space, and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a first embodiment of a movable iron core type proportional valve of the utility model;

[0026] Figure 2 This is a sectional view of the overall structure of a first embodiment of a movable iron core type proportional valve of the utility model;

[0027] Figure 3 This is a sectional view of the overall structure of a first embodiment of a movable iron core type proportional valve of the utility model;

[0028] Figure 4 The utility model is a movable iron core type proportional valve Figure 3 A partial enlarged view of the

[0029] Figure 5 It is a sectional view of the overall structure of a second embodiment of a movable iron core type proportional valve of the utility model;

[0030] Figure 6 It is a sectional view of the overall structure of a second embodiment of a movable iron core type proportional valve of the utility model;

[0031] Figure 7 The utility model is a movable iron core type proportional valve Figure 6 A partial enlarged view of the

[0032] In the accompanying drawings: 1. valve body; 2. valve cavity; 3. valve port; 4. blocking mechanism; 5. elastic member; 6. sealing assembly; 7. fan; 21. first valve cavity; 22. second valve cavity; 31. annular groove; 41. valve stem assembly; 42. balancing membrane; 43. valve stem; 44. slot; 45. slide; 46. convex ring; 61. first sealing member; 62. second sealing member; 63. first inclined surface; 64. second inclined surface; 65. sealing ring; 71. first pipeline. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0034] like Figures 1 to 7 As shown, a preferred embodiment of a moving iron core type proportional valve is shown, comprising: a valve body 1, wherein the valve body 1 has a valve cavity 2 and valve ports 3 respectively connected to the valve cavity 2, a sealing mechanism 4 is provided in the valve cavity 2, and the sealing mechanism 4 cooperates with the valve port 3 for sealing.

[0035] Furthermore, as a preferred embodiment, at least one elastic member 5 is installed on the sealing mechanism 4, and a sealing assembly 6 is provided on the sealing mechanism 4. The elastic member 5 provides elastic force for the sealing assembly 6 to move toward the valve port 3, so as to improve the sealing performance between the sealing assembly 6 and the valve port 3.

[0036] Further, as a preferred embodiment, the elastic member 5 drives the blocking mechanism 4 to press the sealing assembly 6 against the valve port 3 .

[0037] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0038] The utility model also has the following implementation methods based on the above:

[0039] In further embodiments of the present invention, please continue to refer to Figures 1 to 7 As shown, the sealing mechanism 4 includes: a valve stem assembly 41 and a balancing membrane 42. The valve stem assembly 41 is provided with a sealing assembly 6, which cooperates with the valve port 3 to seal. The inner periphery of the balancing membrane 42 is sleeved on the valve stem assembly 41, and the outer periphery of the balancing membrane 42 is installed on the valve body 1.

[0040] The utility model arranges an elastic member 5 and a sealing assembly 6 on the blocking mechanism 4, and the sealing assembly 6 is pressed against the valve port 3 by the elastic member 5, thereby improving the sealing performance at the valve port 3, and can reduce the installation of an electromagnetic valve at another position, has a simple structure, reduces the overall volume, reduces the occupied space, and reduces the cost.

[0041] Preferably, the elastic member 5 is a spring.

[0042] First embodiment:

[0043] like Figures 1 to 4 As shown, in a further embodiment of the present invention, the sealing assembly 6 includes: a first sealing member 61 .

[0044] In a further embodiment of the utility model, the valve stem assembly 41 includes: a valve stem 43, a first sealing member 61 installed on one end of the valve stem 43, one end of an elastic member 5 installed on one end of the valve stem 43, and the other end of the elastic member 5 is against the inner wall of the valve body 1, and the elastic force of the elastic member 5 is used to drive the first sealing member 61 on the valve stem 43 to press against the valve port 3.

[0045] In a further embodiment of the utility model, a plurality of elastic members 5 are installed on one end of the valve stem 43 , and the plurality of elastic members 5 are distributed at equal intervals along the circumference of the valve stem 43 , and the plurality of elastic members 5 are respectively against the inner wall of the valve body 1 .

[0046] Preferably, a limiting ring is provided on the valve stem 43 for limiting the position of the plurality of elastic members 5 , or a connecting block is provided on the valve stem 43 , and the elastic members 5 are clamped on the connecting block for limiting or fixing the elastic members 5 .

[0047] In a further embodiment of the utility model, the outer periphery of one end of the valve stem 43 has a groove 44, the first sealing member 61 is embedded in the groove 44, and the outer periphery of the first sealing member 61 has a first inclined surface 63, and the first inclined surface 63 is matched with the valve port 3 for sealing.

[0048] In a further embodiment of the utility model, the moving iron core type proportional valve also includes: a fan 7, the valve chamber 2 is divided into a first valve chamber 21 and a second valve chamber 22 by a balance membrane, the first valve chamber 21 is connected to the valve port 3, and the second valve chamber 22 is connected to the fan 7, and the second valve chamber 22 is inflated by the fan 7 to provide the valve stem assembly 41 with a force to compress the elastic member 5.

[0049] Preferably, a first pipeline 71 is installed on the side wall of the valve body 1 , and the second valve chamber 22 is connected to the fan 7 through the first pipeline 71 .

[0050] Second embodiment:

[0051] like Figures 5 to 7 As shown, the general structure of this embodiment is basically the same as that of the first embodiment, except that the sealing assembly 6 includes a first sealing member 61 and a second sealing member 62 .

[0052] In a further embodiment of the utility model, the valve stem assembly 41 includes: a valve stem 43 and a slide 45, a first sealing member 61 is installed on one end of the valve stem 43, an elastic member 6 is sleeved on the valve stem 43, a slide 45 is slidably arranged on the valve stem 43, a second sealing member 61 is installed on the slide 45, an elastic member 5 is arranged between the valve stem 43 and the slide 45, and the first sealing member 61 is cooperated with the valve port 3 through the second sealing member 62 to seal.

[0053] In a further embodiment of the present invention, the outer periphery of the valve stem 43 has a convex ring 46 , and one end of the elastic member 5 abuts against the convex ring 46 .

[0054] In a further embodiment of the present invention, the inner wall of the valve body 1 at the valve port 3 has an annular groove 31 , the outer wall of the slide 45 slides in the annular groove 31 , and the second sealing member 62 is limited between the slide 45 and the annular groove 31 .

[0055] In a further embodiment of the present invention, the first sealing member 61 is installed on one end of the valve stem 43 , and the outer periphery of the first sealing member 61 has a first inclined surface 63 .

[0056] In a further embodiment of the present invention, the inner periphery of the second sealing member 62 has a second inclined surface 64 , and the first inclined surface 63 is in sealing cooperation with the second inclined surface 64 .

[0057] In a further embodiment of the present invention, a sealing ring 65 is disposed between the outer periphery of the second sealing member 62 and the inner wall of the valve port 3 .

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A moving iron core type proportional valve, characterized in that: include: A valve body, wherein the valve body has a valve cavity and valve ports respectively connected to the valve cavity, and a blocking mechanism is provided in the valve cavity, and the blocking mechanism cooperates with the valve ports for blocking; At least one elastic member is installed on the blocking mechanism, and a sealing assembly is provided on the blocking mechanism, wherein the elastic member provides elastic force for the sealing assembly to move toward the valve port, so as to improve the sealing performance between the sealing assembly and the valve port; The blocking mechanism comprises: a valve stem assembly and a balancing membrane, the valve stem assembly is provided with the sealing assembly, the sealing assembly cooperates with the valve port blocking, the inner periphery of the balancing membrane is sleeved on the valve stem assembly, and the outer periphery of the balancing membrane is installed on the valve body; It also includes: a fan, the valve chamber is divided into a first valve chamber and a second valve chamber by the balance membrane, the first valve chamber is connected to the valve port, and the second valve chamber is connected to the fan, and the second valve chamber is inflated by the fan to provide the valve stem assembly with a force to compress the elastic member.

2. The moving iron core type proportional valve according to claim 1, characterized in that: The elastic member drives the blocking mechanism to press the sealing assembly against the valve port.

3. The moving iron core type proportional valve according to claim 2, characterized in that: The sealing assembly comprises: a first sealing member; The valve stem assembly includes: a valve stem, the first sealing member is installed on one end of the valve stem, one end of the elastic member is installed on one end of the valve stem, and the other end of the elastic member is against the inner wall of the valve body, and the elastic force of the elastic member is used to drive the first sealing member on the valve stem to press against the valve port.

4. The moving iron core type proportional valve according to claim 3, characterized in that: A plurality of elastic members are installed on one end of the valve stem. The plurality of elastic members are distributed at equal intervals along the circumference of the valve stem. The plurality of elastic members are respectively against the inner wall of the valve body.

5. The moving iron core type proportional valve according to claim 3, characterized in that: The outer periphery of one end of the valve stem has a slot, the first sealing member is embedded in the slot, and the outer periphery of the first sealing member has a first inclined surface, and the first inclined surface cooperates with the valve port plugging.

6. The moving iron core type proportional valve according to claim 2, characterized in that: The sealing assembly comprises: a first sealing member and a second sealing member; The valve stem assembly comprises: A valve stem, wherein the first sealing member is mounted on one end of the valve stem, and the elastic member is sleeved on the valve stem; The slide is slidably arranged on the valve stem, the second sealing member is installed on the slide, the elastic member is disposed between the valve stem and the slide, and the first sealing member cooperates with the valve port through the second sealing member.

7. The moving iron core type proportional valve according to claim 6, characterized in that: The outer periphery of the valve stem is provided with a convex ring, and one end of the elastic member abuts against the convex ring.

8. The moving iron core type proportional valve according to claim 6, characterized in that: The inner wall of the valve body located at the valve port has an annular groove, the outer wall of the slide slides in the annular groove, and the second sealing member is limitedly located between the slide and the annular groove; The first sealing member is installed on one end of the valve stem, and the outer periphery of the first sealing member has a first inclined surface; The inner periphery of the second sealing member has a second inclined surface, and the first inclined surface is in sealing cooperation with the second inclined surface; A sealing ring is disposed between the outer periphery of the second sealing member and the inner wall of the valve port.

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