CN210050382U

CN210050382U - Valve core component of double-cavity double-spring for electric valve

Info

Publication number: CN210050382U
Application number: CN201920578627.3U
Authority: CN
Inventors: 周水根; 裘慧祥; 袁俊
Original assignee: Zhejiang Hongsen Machinery Co Ltd
Current assignee: Zhejiang Hongsen Machinery Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-02-11
Anticipated expiration: 2029-04-26

Abstract

The utility model discloses a case part of two-chamber dual spring for electric valve, including case, needle and lead screw driven silk cap nut, its characterized in that: the valve core is of a tubular structure, the tail end of the pipe body is reduced to form a valve port, the valve port is matched with the top end of the valve needle, and a valve needle sleeve, a bottom surface of a screw sleeve nut and the valve core which are sleeved on the periphery of the valve needle are enclosed to form a first valve core inner cavity, and a first spring which is connected with the screw sleeve nut and the end surface of the valve core valve port is arranged in the first valve core inner cavity; the tail end of the valve needle and the reducing end surface on the central hole of the screw sleeve nut form a second valve core inner cavity, and a second spring for connecting the tail end of the valve needle and the reducing end surface on the screw sleeve nut is arranged in the second valve core inner cavity; the pressure between the inner cavity of the first valve spool and the inner cavity of the second valve spool is the same. The utility model discloses make full use of two spring structure of two-chamber reduces the needle to the impact wear of valve port, increases sealing performance to make two-chamber pressure balance, realize the technical performance that zero pressure differential opened the motorised valve.

Description

Valve core component of double-cavity double-spring for electric valve

Technical Field

The utility model relates to a case part specifically indicates a case part of two-chamber double spring for electric valve.

Background

The valve core is the heart of the valve and plays a key role in controlling the opening and closing of the valve. In the field of electric valves, particularly in some special fields with obvious pressure difference feeling of valve core starting, the valve core is required to be started by zero pressure difference, the technical problems that the valve core is frequently started, a valve needle and a valve port are impacted to be pressed to be opened and closed often exist in the field, and the problem that a screw rod on the electric valve is damaged by negative pressure operation or the electric valve cannot be opened and the like is obviously caused by the pressure difference starting. The service life of the valve needle and the valve core is shortened by the impact opening and closing of the valve needle and the valve port. How to solve the above problems is a technical problem which needs to be solved urgently by those skilled in the art.

Disclosure of Invention

The utility model provides a simple structure, pressure differential balance, switching strike little, long service life's case part of two-chamber dual spring for electric valve.

A valve core part of a double-cavity double-spring for an electric valve comprises a valve core, a valve needle and a screw sleeve nut driven by a screw rod, wherein the valve core is of a tubular structure, the tail end of a pipe body is reduced to form a valve port, the valve port is matched with the top end of the valve needle and sleeved on a valve needle sleeve, the bottom surface of the screw sleeve nut and the valve core on the periphery of the valve needle to form a first valve core inner cavity in a surrounding manner, and a first spring for connecting the screw sleeve nut and the end surface of the valve core; the tail end of the valve needle and the reducing end surface on the central hole of the screw sleeve nut form a second valve core inner cavity, and a second spring for connecting the tail end of the valve needle and the reducing end surface on the screw sleeve nut is arranged in the second valve core inner cavity; and the pressure in the inner cavity of the first valve spool is balanced with the pressure in the inner cavity of the second valve spool.

The utility model discloses a thread sleeve nut, including first pipeline section, second pipeline section, third pipeline section, fourth pipeline section four pipeline sections altogether are equipped with from up in proper order down to the screw sleeve nut periphery, first pipeline section is the inside screw thread that is equipped with of circular structure, threaded connection valve needle cover, the second pipeline section includes two symmetrical circular arc structures and two perpendiculars, perpendicular and circular arc interval set up, the third pipeline section includes two symmetrical circular arc structures and two perpendiculars, perpendicular and circular arc interval set up, the pipe diameter of third pipeline section is less than the second pipeline section, third pipeline section periphery is equipped with the case lid of threaded connection case, the fourth pipeline section includes two symmetrical circular arc structures and two perpendiculars, perpendicular and circular arc interval set up, fourth pipeline section inboard is equipped with the screw thread section of.

The valve needle is a T-shaped structure, and the valve needle is inserted into the valve needle sleeve.

A first pressure balance hole is formed in the side wall of the valve core of the inner cavity of the first valve core and communicated with a piston cylinder positioned on the periphery of the valve core; and a second pressure balance hole is formed in the side wall of the screw sleeve nut of the inner cavity of the second valve core and communicated with the piston cylinder.

The outside of the valve port is provided with a second valve port with the diameter increased, the periphery of the second valve port is connected with the piston cylinder through a sealing ring, and the periphery of the piston cylinder is provided with a first sealing ring.

According to the above technical scheme, the utility model provides a case part adopts valve port cooperation needle, the valve needle cover, the screw sleeve nut bottom surface, the case encloses into first case inner chamber, the undergauge terminal surface by on the centre bore of needle tail end and screw sleeve nut forms second case inner chamber simultaneously, constitute two-chamber structure, at case switching in-process earlier by first spring compression control needle and the valve port closure of first case inner chamber, it is sealed with valve port locking afterwards through the second spring compression control needle in the second case inner chamber, the switching of the switching through the sectional type avoids the punching press formula switching of needle and valve port, the life of extension case. As for the pressure balance of the dual-cavity structure, the piston cylinder is used as an intermediate cavity, and the pressure balance of the inner cavity structures of the first valve core and the second valve core is realized through the first pressure balance hole and the second pressure balance hole. As the utility model discloses a by-pass piston cylinder also can be along with the case motion, reaches the effect of going the valve port on the sealed motorised valve body by the piston cylinder, uses the switching effect that this case can realize two valve ports of motorised valve that promptly, has good use value to the equipment switching of some high demands.

The utility model discloses make full use of two spring structure of two-chamber reduces the needle to the impact wear of valve port, increases sealing performance to make two-chamber pressure balance, realize the technical performance that zero pressure differential opened the motorised valve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a valve core component of a dual-chamber dual-spring for an electric valve according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view of a valve core component of a dual-chamber dual-spring for an electric valve according to an embodiment of the present invention.

Fig. 3 is a schematic exploded perspective view of a valve core component of a dual-chamber dual-spring for an electric valve according to an embodiment of the present invention.

Detailed Description

The embodiment of the utility model provides a case part of two-chamber double spring for electric valve, it mainly realizes the twice cooperation of needle and valve port through two inner chambers, and the first time is sealed cooperation, and the second time is the locking cooperation, reaches benign, long-term effectual valve switching performance. When realizing above-mentioned technical purpose the utility model discloses still having considered, second case inner chamber is in constituteing, reliability and convenience in the assembly, and the establishment to two cavities is not that technical personnel in the field can simply realize because traditional structure all is the structure of single cavity, is establishing an associated cavity in addition for produce the linkage effect between two cavities, it is this the utility model discloses the technical problem of thinking in the research process. The balance of the pressure difference between the two other chambers and the arrangement of the balance hole are the technical objects to be considered.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention provides a valve element component of a dual-chamber dual-spring for an electric valve, including a valve element 2, a valve needle 8, and a screw nut 4 driven by a screw, wherein a thread section 11 in the screw nut 4 is matched with the screw, the valve element 2 is a tubular structure, and a diameter reduction is formed at a tail end of a tube body to form a valve port 10. The valve port 10 cooperates with the top end of the valve needle 8, the valve needle sleeve 7, the bottom surface of the screw sleeve nut 4 and the valve core 2 which are sleeved on the periphery of the valve needle 8 to form a first valve core inner cavity, and a first spring 9 which is connected with the screw sleeve nut 4 and the valve core valve port end surface is arranged in the first valve core inner cavity. The tail end of the valve needle 8 and the reducing end surface on the central hole of the screw sleeve nut 4 form a second valve core inner cavity, and a second spring 6 which is connected with the tail end of the valve needle and the reducing end surface on the screw sleeve nut is arranged in the second valve core inner cavity.

As a further technical feature, pressure is balanced between the first spool internal chamber and the second spool internal chamber.

Example 1 for achieving the above technical object

A first pressure balance hole 3 is formed in the side wall of the valve core 2 of the inner cavity of the first valve core, and the first pressure balance hole 3 is communicated with a piston cylinder 1 positioned on the periphery of the valve core; and a second pressure balance hole is formed in the side wall of the screw sleeve nut 4 of the inner cavity of the second valve core and communicated with the piston cylinder 1.

As a good connecting structure, the periphery of the screw sleeve nut 4 is sequentially provided with a first pipe section 18, a second pipe section 17, a third pipe section 16 and a fourth pipe section 15 from bottom to top, the first pipe section 18 is a circular structure, threads are arranged inside the first pipe section and connected with the valve needle sleeve 7, the inner cavity of the second valve needle sleeve can be formed by the valve needle sleeve 7 and the screw sleeve nut 4, and the valve needle 8 is positioned in the inner cavity of the second valve needle sleeve. The second pipe section 17 comprises two symmetrical circular arc structures and two vertical surfaces, the vertical surfaces and the circular arcs are arranged at intervals, the circular arcs are matched with the valve core 2 as matching surfaces, and the vertical surfaces reduce the contact area between the screw sleeve nut 4 and the valve core 2, namely reduce abrasion. The third pipeline section includes two symmetrical circular arc structures and two perpendicular faces, perpendicular face and circular arc interval set up, the pipe diameter of third pipeline section 16 is less than second pipeline section 17, third pipeline section periphery is equipped with the case lid 5 of threaded connection case, the undergauge structure through the third pipeline section avoids it to take place the friction with case lid 5, fourth pipeline section 15 includes two symmetrical circular arc structures and two perpendicular faces, perpendicular face 14 and circular arc interval set up, the 15 inboard screw thread section 11 that is equipped with the cooperation lead screw that is equipped with of fourth pipeline section, perpendicular face and circular arc interval set up the fastening connection who is convenient for realize between silk cover nut 4 and the needle cover 7.

As the prior technical structure, the valve needle 8 is in a T-shaped structure and is inserted into the valve needle sleeve.

As a new implementation structure, namely, embodiment 2

The outside of the valve port is provided with a second valve port 19 with the diameter increased, the periphery of the second valve port 19 is connected with the piston cylinder 1 through a sealing ring 20, and the periphery of the piston cylinder is provided with a first sealing ring, so that the piston cylinder can move along with the valve core, the effect of sealing the valve port on the valve body of the electric valve by the piston cylinder is achieved, namely the valve core can realize the opening and closing effect of two valve ports of the electric valve.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a case part of two-chamber dual spring for electric valve, includes case, needle and the screw drive's of lead screw silk cover nut, its characterized in that: the valve core is of a tubular structure, the tail end of the pipe body is reduced to form a valve port, the valve port is matched with the top end of the valve needle, and a valve needle sleeve, a bottom surface of a screw sleeve nut and the valve core which are sleeved on the periphery of the valve needle are enclosed to form a first valve core inner cavity, and a first spring which is connected with the screw sleeve nut and the end surface of the valve core valve port is arranged in the first valve core inner cavity; the tail end of the valve needle and the reducing end surface on the central hole of the screw sleeve nut form a second valve core inner cavity, and a second spring for connecting the tail end of the valve needle and the reducing end surface on the screw sleeve nut is arranged in the second valve core inner cavity; and the pressure in the inner cavity of the first valve spool is balanced with the pressure in the inner cavity of the second valve spool.

2. The valve element component of the dual-chamber dual-spring for the electric valve according to claim 1, wherein four pipe sections including a first pipe section, a second pipe section, a third pipe section and a fourth pipe section are sequentially arranged on the outer periphery of the screw nut from bottom to top, the first pipe section is a circular structure and internally provided with threads, the first pipe section is in threaded connection with the valve needle sleeve, the second pipe section comprises two symmetrical circular arc structures and two vertical planes, the vertical planes and the circular arcs are arranged at intervals, the third pipe section is smaller in pipe diameter than the second pipe section, the outer periphery of the third pipe section is provided with a valve element cover in threaded connection with the valve element, the fourth pipe section comprises two symmetrical circular arc structures and two vertical planes, the vertical planes and the circular arcs are arranged at intervals, and the inner side of the fourth pipe section is provided with a thread section matched with the screw rod.

3. The valve core component with the double cavities and the double springs for the electric valve according to claim 1, wherein the valve needle is of a T-shaped structure, and the valve needle is inserted into a valve needle sleeve.

4. The valve core component of the dual-chamber dual-spring for the electric valve according to claim 1, wherein a first pressure balance hole is formed on the side wall of the valve core of the inner chamber of the first valve core, and the first pressure balance hole is communicated with a piston cylinder positioned on the periphery of the valve core; and a second pressure balance hole is formed in the side wall of the screw sleeve nut of the inner cavity of the second valve core and communicated with the piston cylinder.

5. The dual-chamber dual-spring valve core component for an electric valve according to claim 1, wherein a second valve port with an increased diameter is arranged outside the valve port, the periphery of the second valve port is connected with the piston cylinder through a sealing ring, and a first sealing ring is arranged on the periphery of the piston cylinder.