Control valve

Abstract

The invention discloses a control valve which comprises a driving component, a valve body component and a valve core component, the driving component is detachably connected with the valve body component, the control valve is characterized by further comprising a cut-off component and a balance channel, the driving component comprises a driving cavity, the valve body component comprises a valve cavity, and the valve core component is detachably connected with the cut-off component. The balance channel can be communicated with the driving cavity and the valve cavity, and the cut-off component can close the balance channel. According to the control valve provided by the invention, when the driving component of the control valve is maintained, only the balance channel needs to be closed through the cut-off component, and the valve body component and the driving component are disassembled for inspection and maintenance, so that the operation is simple and convenient.

Description

[0001] This application claims priority to the following Chinese patent application, the entire contents of which are incorporated herein by reference: Application number: 202310782438.9, Application date: June 29, 2023, Applicant: Zhejiang Sanhua Commercial Refrigeration Co., Ltd., Invention name: A control valve. Technical Field

[0002] The invention belongs to the technical field of fluid control, and in particular relates to a control valve. Background Art

[0003] Control valves are commonly used in fluid control systems. If a control valve with a drive component is installed in a complex system environment, the drive component needs to be repaired after a period of use. For control valves whose drive chamber is connected to the valve chamber, before disassembling the drive component and the valve body component, the flow system often needs to be closed first, and then the control valve needs to be removed from the system, considering the presence of the internal fluid medium.

[0004] Therefore, how to improve the design and provide a control valve that is easy to maintain is an issue that technicians in this field need to consider. Summary of the invention

[0005] The present invention discloses a controlled expansion valve, comprising a driving component, a valve body component and a valve core component, wherein the driving component is detachably connected to the valve body component and can drive the valve core component to move; the invention also comprises a cut-off component and a balancing channel, wherein the driving component comprises a driving cavity, the valve body component comprises a valve cavity, the balancing channel can connect the driving cavity with the valve cavity, and the cut-off component can close the balancing channel.

[0006] According to the control valve provided by the present invention, when repairing the driving component of the control valve, it is only necessary to close the balancing channel through the cut-off component so that the fluid in the valve cavity is not connected with the fluid in the driving cavity. The valve body component and the driving component can be disassembled for inspection and repair without closing the flow path system and removing the control valve from the system. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 : A front view of a control valve structure provided by the present invention;

[0008] Figure 2 : Figure 1 A side view of the control valve structure in FIG.

[0009] Figure 3 : Figure 2 A magnified schematic diagram of the middle area;

[0010] Figure 4 : Figure 2An enlarged schematic diagram of the cut-off component structure;

[0011] Figure 5 : Installation position relationship diagram of some parts of the control valve. Figure 1-Figure 5 Symbols and diagrams:

[0012] 10- control valve;

[0013] 100- driving components;

[0014] 110- base;

[0015] 111-recess / limiting part;

[0016] 112-step hole portion;

[0017] 120-motor;

[0018] 130-reduction mechanism;

[0019] 140-driving member / output gear rack;

[0020] 141- Plate;

[0021] 142- shaft;

[0022] 143-keyway;

[0023] 144-Block;

[0024] 150-hood body;

[0025] 160-outer gear ring;

[0026] 161-Protruding part / fitting part;

[0027] 200-valve body parts;

[0028] 210-valve body;

[0029] 211-step shaft portion, 212-flange portion;

[0030] 221 - first flow path port, 222 - second flow path port;

[0031] 300-valve core parts;

[0032] 310-valve core;

[0033] 320-valve stem;

[0034] 321-key shaft;

[0035] 400-cutoff parts;

[0036] 410-mounting seat;

[0037] 411-convex part;

[0038] 420-cutoff piece;

[0039] 421-operating end, 422-sealing end / sealing pad;

[0040] 430-cover;

[0041] 510-driving chamber;

[0042] 520-valve chamber;

[0043] 530-installation cavity, 531-outer peripheral wall;

[0044] 540-accommodation space;

[0045] 600-balanced channel;

[0046] 610-first pass section;

[0047] 611-first communication hole;

[0048] 612- second communication hole;

[0049] 613-Port unit;

[0050] 620-Second through section;

[0051] 630-third through section;

[0052] 631 - first connecting groove, 632 - second connecting groove, 633 - third connecting groove;

[0053] 710-first sealing member, 720-second sealing member, 731-hard sealing ring;

[0054] 810-Bolts / Fasteners. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts shown in the drawings relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0056] Figure 1 This is a front view of a control valve structure provided by the present invention. Figure 2 for Figure 1Side view of the control valve structure in.

[0057] like Figure 1 and Figure 2 In this embodiment, the control valve 10 is specifically used as an electric switch valve, and mainly includes three parts: a driving component 100, a valve body component 200, and a valve core component 300. The driving component 100 includes a driving chamber 510, the valve body component 200 includes a valve chamber 520, a part of the valve core component 300 is located in the driving chamber 510, and another part of the valve core component is located in the valve chamber 520. The driving component 100 can drive the valve core component 300 to rotate.

[0058] The driving component 100 includes a base 110 and a cover 150, the base 110 and the cover 150 are connected by welding, and the cover 110 and the base 150 are sealed to form at least part of the driving cavity 510. The driving cavity 510 is provided with a motor 120 and a reduction mechanism 130, and the end of the reduction mechanism includes a driving member 140, and the driving member 140 is located in the driving cavity 510.

[0059] The valve body component 200 includes a valve body 210, and the valve body 210 has a valve cavity 520, a first flow path port 221 and a second flow path port 222. The first flow path port 221 and the second flow path port 222 are communicated through the valve cavity 520. The driving component 200 and the valve body component 300 are detachably connected.

[0060] The valve core component 300 includes a valve stem 320 and a plate-shaped valve core 310. One end of the valve stem 310 is rotatably matched with the valve core 320, and the other end of the valve stem 310 is rotatably matched with the driving member 140. The valve core 310 is located in the valve cavity 520, and the driving member 140 drives the valve core 310 to rotate through the valve stem 310 to close and open the flow channel between the first flow path port 221 and the second flow path port 222.

[0061] Figure 3 for Figure 2 A magnified schematic diagram of the middle area. Figure 4 It is an enlarged schematic diagram of the cut-off component structure.

[0062] like Figure 3 and Figure 4 As shown, and refer to Figure 1 and Figure 2The control valve 10 has a balancing channel 600, which can connect the drive chamber 510 and the valve chamber 520. The balancing channel 600 includes a first through section 610 and a second through section 620. The first through section 610 is provided on the valve body 210, and includes a first communication hole 611 provided along the longitudinal direction of the valve body 210 and a second communication hole 612 provided along the radial direction of the valve body 210. In this specific embodiment, the second through section 620 is a radial gap between the valve stem 310 and the valve body 210, the first through section 610 is connected to the drive chamber 510, and the second through section 620 is connected to the valve chamber 520.

[0063] A first seal 710 is further provided in the radial direction between the outer wall of the valve stem 320 and the inner wall of the valve body 210. The first seal 710 seals the radial gap passage in the longitudinal direction of the valve body 210. In the longitudinal direction of the valve body, the second through section 620 is located on one side of the first seal, and part of the first through section 610 is located on the other side of the first seal 710.

[0064] The upper end of the valve body 210 includes a radially outwardly extending flange 212, and the lower end of the base 110 includes a threaded hole. Bolts (fasteners) pass through the through holes of the flange 212 and are screwed into the threaded holes, so that the valve body component 200 and the driving component 100 are detachably connected.

[0065] The control valve 10 further includes a cut-off component 400, which includes a mounting seat 410. The valve body 210 includes a mounting cavity 530 arranged in a radial direction, and the mounting seat 410 includes a circular step-shaped convex portion 411, and a hard sealing ring 731 is arranged between the convex portion 411 and the outer peripheral wall 531 of the mounting cavity 530. The inner wall of the mounting cavity 530 is provided with an internal thread, and the outer edge of the mounting seat 410 is provided with an external thread. The mounting seat 410 is fixed in the mounting cavity 530 by threaded connection, and the convex portion 411 is tightened by the thread so that the hard sealing ring 731 is abutted against the outer peripheral wall 531, thereby realizing the hard sealing of the mounting cavity 530.

[0066] The rod-shaped stopper 420 is threadedly arranged in the threaded hole of the mounting seat 410, and the stopper 420 includes an operating end 421 and a sealing end 422. The stopper 420 is sleeved with a sealing gasket 422 as the sealing end 422. The second connecting hole 612 can connect the mounting cavity 410 with the second through section 620. The stopper 420 can be axially displaced by rotating the operating end, so that the sealing gasket 422 is sealed against the port portion 613 of the second connecting hole 612, so that the balance channel 600 is closed.

[0067] In a normal state, the cover body 430 covers the operating end 421 to prevent misoperation.

[0068] According to the above technical solution, when the control valve 10 is installed and connected to the system, if it is necessary to repair the inside of the driving component 200, it is only necessary to close the balancing channel 600 through the cut-off component 400, block the fluid medium in the valve cavity 5 in the valve body component 200, and then disassemble and separate the driving component 100 and the valve body component 200.

[0069] The above technical solution does not require closing the flow path system first and then removing the control valve 10 from the system, and the operation is simple and convenient.

[0070] As a further extension of the above technical solution, the base 110 includes a stepped hole portion 112, the valve body 210 includes a stepped shaft portion 211, and the inner side surface of the stepped hole portion 112 and the outer side surface of the stepped shaft portion 211 are clearance-matched to achieve position limiting. A second sealing member 720 is provided between the bottom surface of the stepped hole portion 112 and the end surface of the stepped shaft portion 211. This technical solution improves the airtightness of the internal cavity after the drive component 100 and the valve body component 200 are installed, and facilitates loading and unloading and positioning.

[0071] Of course, it is understandable that, as an alternative, the stepped shaft portion may be disposed on the base 110 and the stepped hole portion may be disposed on the valve body 210 to achieve the same effect.

[0072] Figure 5 This is the installation position relationship diagram of some parts of the control valve.

[0073] like Figure 5 Shown and referenced Figure 1 , Figure 2 and Figure 3 As a further extension of the above technical solution, the reduction mechanism 130 is a planetary gear reduction mechanism, including an outer gear ring 160 and an output gear rack at the end, and the output gear rack serves as the driving member 140 .

[0074] The upper end of the base 110 includes two axially symmetrically arranged concave portions 111 extending in the longitudinal direction, and the lower end of the outer gear ring 160 includes two axially symmetrically arranged convex portions 161 extending in the longitudinal direction. The concave portions 111 serve as limiting portions, and the convex portions 161 serve as matching portions. The concave portions 111 and the convex portions 161 are adapted to limit the rotational displacement of the outer gear ring 160, and the outer gear ring 160 abuts against the base 110 to limit the position. Since the axial length of the convex portion 161 is greater than the axial depth of the concave portion 111, after installation, a receiving space 540 can be formed between the upper end of the base 110 and the lower end of the outer gear ring 160.

[0075] The output gear rack / driving member 140 includes a plate portion 141 and a shaft portion 142. The plate portion 141 includes two stops 144 extending radially outward. The plate portion 141 is located in the accommodating space 540. Along the circumference of the outer gear ring 160, the stops 144 cooperate with the protrusion 111. When the output gear rack 140 rotates, the stops 144 can abut against the protrusion 111 to limit the rotation stroke of the output gear rack 140. The shaft portion includes a keyway 143, and the valve stem 320 includes a key shaft 321. The key shaft 321 cooperates with the keyway 143, so that the output gear rack 140 can drive the valve stem 320 to rotate. This technical solution has a compact structure and is easy to install.

[0076] As a further extension of the above technical solution, the balancing channel further includes a third through section 630. The third through section 630 includes a first communicating groove 631, a second communicating groove 632 and a third communicating groove 633. The first communicating groove 631 is provided on the plate portion 141 and extends radially, the second communicating groove is provided on the shaft portion 142 and extends longitudinally, and the third communicating groove 632 is provided on the output gear frame 140 and extends longitudinally. This technical solution uses functional parts to provide communicating grooves, and the communicating inner cavity structure is compact.

[0077] The above are only preferred implementation modes for better illustrating the technical solution of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. All these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A control valve, comprising a driving component, a valve body component and a valve core component, wherein the driving component is detachably connected to the valve body component, and the driving component can drive the valve core component to move, characterized in that: It also includes a cut-off component and a balancing channel. The driving component includes a driving chamber, the valve body component includes a valve chamber, the balancing channel can connect the driving chamber with the valve chamber, and the cut-off component can close the balancing channel.

2. The control valve according to claim 1, characterized in that The valve body component includes a valve body, the valve core component includes a valve stem and a valve core, the drive component includes a drive member, the drive member is at least partially located in the drive cavity, the valve core is at least partially located in the valve cavity, the valve stem is rotatably matched with the valve core, and the valve stem is rotatably matched with the drive member; The balancing channel includes a first through section and a second through section, the first through section is arranged on the valve body, the second through section is a radial gap between the valve stem and the valve body, and the cut-off component is arranged on the valve body, and the cut-off component can close the first through section.

3. The control valve according to claim 2, characterized in that The valve body member includes a first flow path port and a second flow path port, and the valve element can close a flow path between the first flow path port and the second flow path port.

4. The control valve according to claim 2, characterized in that The cut-off component includes a mounting seat and a cut-off piece. The valve body includes a mounting cavity. The mounting seat is fixed to the mounting cavity. The mounting seat is threadedly connected to the cut-off piece. The cut-off piece can close the first through section.

5. The control valve according to claim 4, characterized in that The first through section includes a first communicating hole arranged in the longitudinal direction of the valve body and a second communicating hole arranged in the radial direction. The first communicating hole communicates with the installation cavity and the driving cavity, the second communicating hole communicates with the installation cavity and the second through section, and the stop member can seal and abut against a port portion of the second communicating hole.

6. The control valve according to claim 5, characterized in that The mounting seat includes a convex portion, which is directly or indirectly in contact with the outer peripheral wall of the mounting cavity to seal the mounting cavity; the stop member includes a sealing gasket, which can be in contact with the end portion of the second communicating hole.

7. The control valve according to claim 4, characterized in that A first seal is also provided between the outer wall of the valve stem and the inner wall of the valve body. Along the longitudinal direction of the valve body, the second through section is located on one side of the first seal, and at least part of the first through section is located on the other side of the first seal.

8. The control valve according to any one of claims 2 to 7, characterized in that: The driving component includes a base, the valve body component includes a valve body, and the base is connected to the valve body through a fastener or a threaded connection.

9. The control valve according to claim 8, characterized in that The driving component also includes a motor, a reduction mechanism and a cover body, the cover body is welded to the base, the cover body and the base form at least part of the driving cavity, and the motor and the reduction mechanism are located in the driving cavity; the reduction mechanism is a planetary gear reduction mechanism, the reduction mechanism includes an outer ring gear, the base includes a limiting portion, the outer ring gear includes a matching portion, and the matching portion cooperates with the limiting portion to limit the rotational displacement of the outer ring gear.

10. The control valve according to claim 9, characterized in that The upper end portion of the base includes a longitudinally extending recess, which serves as the limiting portion; the lower end portion of the outer gear ring includes a longitudinally extending convex portion, which serves as the matching portion; the reduction mechanism includes an output gear rack, which serves as the driving member; the output gear rack includes a plate portion and a shaft portion, the shaft portion includes a keyway, the valve stem includes a key shaft, and the key shaft cooperates with the keyway; the plate portion is at least partially located between the upper end portion of the base and the lower end portion of the outer gear ring, the plate portion includes a stopper extending radially outward, and the stopper can abut against the convex portion to limit the rotational stroke of the output gear rack.

11. The control valve according to claim 10, characterized in that The balance channel also includes a third through section, which includes a first communicating groove, a second communicating groove and a third communicating groove, wherein the first communicating groove is arranged on the plate portion and extends radially, the second communicating groove is arranged on the shaft portion and extends longitudinally, and the third communicating groove is arranged on the output gear frame and extends longitudinally.

12. The control valve according to claim 8, characterized in that The base is connected to the valve body by fasteners, one of the base and the valve body includes a stepped hole portion, and the other of the base and the valve body includes a stepped shaft portion, the inner side surface of the stepped hole portion and the outer side surface of the stepped shaft portion are limitedly matched, and a second sealing member is provided between the bottom surface of the stepped hole portion and the end surface of the stepped shaft portion.

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