CN211398747U

CN211398747U - Valve core and valve core hole necking die

Info

Publication number: CN211398747U
Application number: CN201821348259.5U
Authority: CN
Inventors: 王彬丞
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-21
Filing date: 2018-08-21
Publication date: 2020-09-01
Anticipated expiration: 2028-08-21

Abstract

The utility model relates to a case that choke valve used and case throat mould of this case. The valve core comprises a valve core body, the valve core body is provided with a valve core hole which is axially communicated, a throttling pipe is arranged in the valve core hole, and the throttling pipe is provided with a throttling hole which is axially communicated. The valve core structure of the structure is based on the condition that the aperture of the throttling hole is abnormally small, wherein the valve core hole can be processed into a conventional hole with a larger aperture, the processing of the conventional hole has no process difficulty, the throttling hole of the conventional throttle valve core in the prior art is processed in a mode of combining conventional drilling and reaming, the aperture of the throttling hole of the throttling pipe is smaller, but a small-aperture metal pipe similar to a needle head and the like can be purchased in the market, the problem of processing difficulty does not exist, the two are combined, namely the throttling pipe is installed in the valve core hole, the problem of manufacturing of the abnormal small-aperture throttle valve is solved, and the throttle valve has the technical advantages of simple structure and low manufacturing cost.

Description

Valve core and valve core hole necking die

Technical Field

The utility model relates to a case that choke valve was used and case hole throat mould of this case.

Background

In the throttle valve core in the prior art, a throttle hole on the valve core is processed by a processing mode of firstly drilling and then reaming on a valve core body. However, when the diameter of the valve core and the orifice of the valve core are smaller, for example, the aperture of the orifice is required to be 0.5mm or less, the conventional drilling and reaming-before-drilling processing method is difficult to perform, and although the processing can be realized by a high-precision processing center, the production cost is increased greatly, and the industrial applicability is not strong. Therefore, there is a need for an improved structure and manufacturing method of the existing small-sized throttle valve spool.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to solve the case structure and the processing method of choke valve among the prior art and be not applicable to the technical defect of minimum size choke valve processing.

In order to solve the technical problem, the utility model provides a technical scheme as follows: the valve core comprises a valve core body, wherein the valve core body is provided with a valve core hole which is axially communicated, a throttling pipe is arranged in the valve core hole, and the throttling pipe is provided with a throttling hole which is axially communicated.

The valve core with the structure is characterized in that the throttling pipe is arranged in the valve core hole of the valve core body, the throttling hole for throttling is arranged in the throttling pipe, even if the aperture of the throttling hole required to be throttled is abnormally small, the valve core hole for installing the throttling pipe can be processed into a conventional hole with a larger aperture, the processing of the conventional hole has no process difficulty, the throttling hole of the conventional throttling valve core in the prior art is processed in a mode of combining conventional drilling and reaming, although the aperture of the throttling hole of the throttling pipe is smaller, small-aperture metal pipes similar to needles and the like can be purchased in the market, the problem of processing difficulty does not exist, the two are combined, namely the throttling pipe is arranged in the valve core hole, the problem of manufacturing the throttling valve with the abnormal small aperture is solved, and the throttling valve core with the abnormal small aperture has the technical advantages of simple structure and low.

In a preferred embodiment, the throttle pipe is in clearance fit with the valve core hole.

In a preferred embodiment, the aperture of the throttle hole is less than or equal to 0.5 mm.

In a preferred embodiment, the length of the throttle pipe is less than that of the valve core hole, and the distance between the end surface of the throttle pipe and the end surface of the valve core body is 0.1-0.3 mm.

In a preferred embodiment, the end of the spool hole has a constriction, the minimum bore diameter of which is smaller than the outer diameter of the throttle pipe.

In a preferred embodiment, the valve core body comprises a large-diameter section and small-diameter sections positioned on two sides of the large-diameter section, and a step end face is formed between the small-diameter sections and the large-diameter section.

In a preferred embodiment, the free end of the small diameter section is provided with a chamfered conical surface.

In a preferred embodiment, at least one annular seal groove is formed in the large-diameter section of the valve core body.

A valve core hole necking die for manufacturing the valve core at least comprises an upper die and a lower die, wherein the upper end surface of the lower die is provided with a positioning counter bore, the positioning counter bore comprises a small-diameter hole matched with the small-diameter section of a valve core body and a large-diameter hole matched with the large-diameter section of the valve core body, the bottom of the large-diameter hole is matched with the end surface of a step, and the depth of the small-diameter hole is more than or equal to the height of the small-diameter section; the lower end of the upper die is provided with a taper hole.

Drawings

FIG. 1 is a schematic view of the external structure of the valve cartridge of the present embodiment;

FIG. 2 is a schematic structural diagram of the valve core in an exploded state in the present embodiment;

FIG. 3 is a schematic sectional view of the valve cartridge of the present embodiment;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

FIG. 5 is a necking die for machining a necking of a valve core hole according to the embodiment;

fig. 6 is a schematic view of the necking die of fig. 5 for machining the valve core hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 3, the valve element of the present embodiment includes a valve element body 10, where the valve element body 10 includes a large diameter section and small diameter sections 20 located at two sides of the large diameter section, and a step end surface 30 is formed between the small diameter section 20 and the large diameter section.

In the present embodiment, the spool body 10 is provided with a spool hole 50 that axially penetrates, the throttle pipe 40 is installed in the spool hole 50, and the throttle pipe 40 is provided with a throttle hole 41 that axially penetrates. In general, the orifice 41 has a diameter of 0.5mm or less. It should be noted that, when the aperture of the orifice is greater than 0.5mm, the technical solution of installing the orifice pipe in the valve core hole of the present embodiment may also be adopted, but in the case of an orifice with a larger diameter, the solution is not cost-effective compared with the conventional method of directly adopting drilling and reaming to process the orifice hole.

As shown in fig. 3 and 4, in the present embodiment, the throttle pipe 40 is in clearance fit with the valve core hole 50, so that the throttle pipe and the valve core hole can be assembled conveniently.

A preferable fixing manner of the throttle pipe 40 in the valve core hole 50 is shown in fig. 3 and 4, wherein the length of the throttle pipe 40 is smaller than the length of the valve core hole 50, and the distance between the end surface of the throttle pipe 40 and the end surface of the valve core body is 0.1-0.3 mm in a normal condition. In addition to this structure, the valve body hole is subjected to a necking process to form a throat 51, and the minimum bore diameter of the throat 51 is smaller than the outer diameter of the throttle pipe. In the process of processing the necking, a chamfer conical surface 21 is formed at the free end of the small-diameter section. The necking has two functions, one is to limit the throttle pipe in the valve core hole; and secondly, sealing between the outer surface of the throttle pipe and the inner surface of the valve core hole is realized by forming sealing between the conical surface of the necking and the end surface of the throttle pipe.

In a preferred embodiment, at least one annular seal groove 11 is arranged on a large-diameter section of the valve core body 10, and a seal ring 12 is arranged in the annular seal groove 11 for realizing the seal between the valve core and the valve body. Preferably, the seal ring is an O-ring seal.

The manufacturing method for machining the valve core in the embodiment is characterized by at least comprising the following steps of:

s1: turning a valve core body, wherein the valve core body comprises a large-diameter section and small-diameter sections positioned on two sides of the large-diameter section;

s2: drilling, namely machining a valve core blank hole on the valve core body;

s3: reaming, namely reaming on the basis of the blank hole of the valve core to form a valve core hole;

s4: necking, namely punching one end of the valve core hole to form a necking and a chamfer conical surface;

s5: penetrating a throttle pipe into the valve core hole from one side of the valve core hole far away from the necking;

s6: and (4) necking, namely punching the other end of the valve core hole to form a necking and a chamfer conical surface.

It should be noted that, in the steps S4 and S6, a dedicated necking die is required, and the other steps are conventional steps. In this embodiment, the necking die includes an upper die 60 and a lower die 70, as shown in fig. 5 and 6. The upper end face of the lower die 70 is provided with a positioning counter bore, and the positioning counter bore comprises a small-diameter hole 72 matched with the small-diameter section of the valve core body and a large-diameter hole 71 matched with the large-diameter section of the valve core body. In the necking process, the bottom of the large-diameter hole is matched with the step end face 30 of the valve core body, and the depth of the small-diameter hole 72 is larger than or equal to the height of the small-diameter section 20. Wherein the lower end of the upper die 60 is provided with a taper hole 61.

In the necking process, one end of the valve core body is placed in the counter bore, the descending speed and the descending stroke of the upper die are set, the upper die descends, and under the action of the taper hole 61, a chamfer conical surface 21 is formed on the small-diameter section of the valve core body and a necking 51 is formed at the valve core hole.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims

1. The valve core comprises a valve core body (10) and is characterized in that the valve core body (10) is provided with a valve core hole (50) which is axially communicated, a throttle pipe (40) is installed in the valve core hole (50), and the throttle pipe (40) is provided with a throttle hole (41) which is axially communicated.

2. The valve cartridge of claim 1, wherein the throttle tube is in clearance fit with the cartridge bore.

3. Valve cartridge according to claim 1, characterized in that the orifice (41) has a hole diameter of less than or equal to 0.5 mm.

4. The valve core according to claim 1, characterized in that the length of the throttle pipe (40) is less than the length of the valve core hole, and the distance from the end surface of the throttle pipe to the end surface of the valve core body is 0.1-0.3 mm.

5. Valve cartridge according to any of claims 1 to 4, characterized in that the end of the valve cartridge bore (50) has a constriction (51), the smallest bore diameter of the constriction (51) being smaller than the outer diameter of the throttle tube.

6. The valve cartridge according to claim 5, wherein the cartridge body (10) comprises a large diameter section and small diameter sections (20) located on both sides of the large diameter section, and a stepped end surface (30) is formed between the small diameter sections (20) and the large diameter section.

7. Valve cartridge according to claim 6, characterized in that the free end of the small-diameter section is provided with a chamfer taper (21).

8. A valve element according to any of claims 1 to 4 or 6 or 7, characterized in that the large diameter section of the valve element body (10) is provided with at least one annular seal groove (11).

9. The valve core hole necking die for machining the valve core according to claim 7 is characterized by at least comprising an upper die (60) and a lower die (70), wherein the upper end surface of the lower die is provided with a positioning counter bore, the positioning counter bore comprises a small-diameter hole (72) matched with the small-diameter section of the valve core body and a large-diameter hole (71) matched with the large-diameter section of the valve core body, the bottom of the large-diameter hole is matched with the step end surface (30), and the depth of the small-diameter hole (72) is larger than or equal to the height of the small-diameter section (20); the lower end of the upper die is provided with a taper hole (61).