CN214248475U

CN214248475U - Stop valve lead screw

Info

Publication number: CN214248475U
Application number: CN202120250494.4U
Authority: CN
Inventors: 葛兵; 戴宏威
Original assignee: Zhejiang Hualong Jushui Hvac Technology Co ltd
Current assignee: Zhejiang Valogin Technology Co ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-09-21
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a stop valve lead screw belongs to valve technical field. The stop valve solves the problem that the sealing performance of a valve core and a valve body on the existing stop valve screw rod is poor. This stop valve lead screw is provided with the assembly through-hole on the case, and the case passes through the assembly through-hole cover to be established at the lower extreme of body, and this case and body axial sliding fit are provided with on the outer wall of the lower extreme of body and keep off the ring, and case and keep off and be provided with the elastic component between the ring, and this case passes through the elastic component and keeps off ring axial elasticity and lean on the cooperation, still is provided with the limit structure who prevents that the case axial from breaking away from the lower extreme of body between case and the body. The utility model has the advantages of reasonable design, simply, stop valve lead screw and case axial elasticity are supported and are leaned on the cooperation, and this case is when cooperating with the valve body is sealed, and the leakproofness is good, eliminates the valve lead screw because of the not good problem of long-term use wearing and tearing leakproofness, long service life.

Description

Stop valve lead screw

Technical Field

The utility model belongs to the technical field of the valve, a stop valve lead screw is related to.

Background

The stop valve is a control component in a fluid conveying system, has the functions of diversion, interception, regulation, throttling, backflow prevention, shunt or overflow pressure relief and the like, can be used for controlling various types of fluid activities such as air, water, steam, various corrosive chemical media, slurry, liquid metal, radioactive substances and the like, but the existing stop valve is always subjected to liquid leakage, so that the equipment needs to be replaced frequently.

The valve rod of the existing stop valve is arranged in the valve body in a penetrating manner, the valve core is axially and fixedly connected to the valve rod, the valve core and the valve rod are axially and circumferentially subjected to limited assembly, and when the stop valve is used for a long time, the valve rod is easy to wear, so that the valve core and the valve body are not tightly matched, and the conditions such as leakage in the valve body are easy to occur; the sealing effect between the valve core and the valve body on the valve rod of the existing stop valve is poor, water seepage is easy, and the service life of the whole product is correspondingly shortened.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, can effectively solve the stop valve lead screw of the poor problem of leakproofness between the case of valve rod and the valve body.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a stop valve lead screw, is including being cylindric body, the upper end of body have the connecting portion that are axial column setting, the outer wall of connecting portion on circumference interval distribution have the latch that is axial setting, the lower extreme of body be provided with the case, its characterized in that, the case on be provided with the assembly through-hole, the case establish the lower extreme at the body through the assembly through-hole cover, this case and body axial sliding fit, the outer wall of the lower extreme of body on be provided with and keep off the ring, case and keep off and be provided with the elastic component between the ring, this case supports to lean on the cooperation through elastic component and fender ring axial elasticity, case and body between still be provided with the limit structure who prevents that the case axial breaks away from the lower extreme of body.

This stop valve lead screw directly wears to establish and uses in the valve body, and the lower extreme of valve rod sets up the case, and this case and stop valve lead screw axial elasticity support to lean on the cooperation, have axial elastic force on making the case all the time, and it is better to cause the sealed effect when both seal up the cooperation of case and valve body.

In foretell stop valve lead screw, limit structure include limit baffle, limit baffle be circular structure, the middle part position of this limit baffle's upper end is provided with the plug-in post, the terminal surface of the lower extreme of body be provided with the inserting groove, limit baffle's plug-in post axial peg graft assemble in the inserting groove of the lower extreme of body, the lower extreme of case and limit baffle axial support to lean on spacingly. The purpose of setting up like this can prevent effectively that the case from at the lower extreme axial displacement of body, stable in structure.

In the stop valve screw rod, the valve core is in an inverted circular truncated cone shape, and the diameter of the lower end face of the valve core is smaller than that of the limiting baffle. The purpose of setting up like this enables the lower extreme and the spacing baffle of case to carry out effectual axial and lean on spacing cooperation.

In the stop valve screw rod, the insertion column of the limit baffle is provided with a through hole, a bolt penetrates through the through hole of the insertion column of the limit baffle, the bolt is spirally and fixedly connected with the bottom of the insertion groove at the lower end of the body, a first compression spring sleeved on the bolt is arranged in the insertion groove at the lower end of the body, and the first compression spring elastically acts on the end part of the outer end of the insertion column of the limit baffle. When practical application, the upper end elasticity of this compression spring one supports against the tank bottom in the inserting groove of the lower extreme of body, and the lower extreme elasticity of this compression spring one supports against in the outer end tip of limit baffle's inserting column, and the purpose that sets up like this can prevent effectively that the spiral of bolt from becoming flexible at the tank bottom in the inserting groove of the lower extreme of body, and connection structure is stable.

In the stop valve screw rod, the inner ribs arranged axially are circumferentially distributed on the inner wall of the assembly through hole of the valve core at intervals, the outer rib grooves arranged axially are circumferentially distributed on the outer wall of the lower end of the body at intervals, and the inner ribs of the valve core and the outer rib grooves of the body are respectively assembled in an axially corresponding sliding mode. The purpose of this is to prevent the valve core from rotating circumferentially when the lower end of the body slides axially.

In the stop valve screw rod, the baffle ring comprises an annular sleeve which is arranged at the lower end of the body in an expanding manner, the lower end of the annular sleeve is provided with a downward turning edge which is arranged in an outward turning manner, the downward turning edge and the annular sleeve are manufactured into an integral structure, and reinforcing plates which are arranged in a radial manner are circumferentially distributed between the downward turning edge and the annular sleeve at intervals. The purpose of setting up like this is to increase the structural strength between lower turn-down edge and the annular sheath, long service life.

In the stop valve lead screw, the elastic part is a second compression spring, a spring groove is formed in the middle of the upper end face of the valve core, the second compression spring is sleeved on the lower end of the body and arranged in the spring groove, the lower end of the second compression spring is elastically abutted against the bottom of the spring groove of the valve core, and the upper end of the second compression spring is elastically abutted against the downward turning edge. The valve core and the stop ring are axially and elastically abutted and matched through the compression spring II, so that the valve core is always provided with axial elastic force, and the axial sealing effect of the valve core is better.

Compared with the prior art, the stop valve screw rod has the advantages that: structural design is reasonable, simple, and stop valve lead screw and case axial elasticity support to lean on the cooperation, and this case is when sealing fit with the valve body, and the leakproofness is good, eliminates the valve lead screw because of the not good problem of long-term use wearing and tearing leakproofness, long service life.

Drawings

Fig. 1 is a schematic sectional structure diagram of the stop valve screw rod.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure, 1, a body; 2. a connecting portion; 3. clamping teeth; 4. a valve core; 5. a limit baffle; 6. inserting the column; 7. a bolt; 8. a first compression spring; 9. inner ribs; 10. an annular sleeve; 11. turning down the edges; 12. a reinforcing plate; 13. and a second compression spring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, this stop valve lead screw mainly comprises being cylindric body 1, and the upper end of body 1 has connecting portion 2 that is the cylindrical setting of axial, and circumference interval distribution has latch 3 that is the axial setting on the outer wall of connecting portion 2, and the lower extreme of body 1 is provided with case 4, is provided with the assembly through-hole on case 4, and case 4 establishes the lower extreme at body 1 through the assembly through-hole cover, and this case 4 and 1 axial sliding fit of body, specific saying: the inner wall of the assembly through hole of the valve core 4 is circumferentially and alternately distributed with inner ridge strips 9 which are axially arranged, the outer wall of the lower end of the body 1 is circumferentially and alternately distributed with outer ridge grooves which are axially arranged, and the inner ridge strips 9 of the valve core 4 and the outer ridge grooves of the body 1 are respectively axially and correspondingly assembled in a sliding manner.

Be provided with on the outer wall of the lower extreme of body 1 and keep off the ring, case 4 with keep off and be provided with the elastic component between the ring, this case 4 supports through elastic component and fender ring axial elasticity and leans on the cooperation, specific theory: the baffle ring mainly comprises an annular sleeve 10 which is arranged at the lower end of a body 1 in an expanding manner, the lower end of the annular sleeve 10 is provided with a downward turning edge 11 which is arranged in an outward turning manner, the downward turning edge 11 and the annular sleeve 10 are manufactured into an integral structure, and reinforcing plates 12 which are arranged in a radial manner are circumferentially distributed between the downward turning edge 11 and the annular sleeve 10 at intervals; the elastic piece is a second compression spring 13, a spring groove is formed in the middle of the upper end face of the valve core 4, the second compression spring 13 is sleeved at the lower end of the body 1 and is arranged in the spring groove, the lower end of the second compression spring 13 is elastically abutted against the groove bottom of the spring groove of the valve core 4, and the upper end of the second compression spring 13 is elastically abutted against the downward turning edge 11.

During actual manufacturing, a limiting structure for preventing the valve core 4 from axially separating from the lower end of the body 1 is arranged between the valve core 4 and the body 1; the specific implementation mode of the limiting structure is as follows: the valve core mainly comprises a limiting baffle 5, wherein the limiting baffle 5 is of a circular structure, an inserting column 6 is arranged in the middle of the upper end of the limiting baffle 5, an inserting groove is formed in the end face of the lower end of the body 1, the inserting column 6 of the limiting baffle 5 is axially inserted and assembled in the inserting groove in the lower end of the body 1, and the lower end of the valve core 4 and the limiting baffle 5 are axially abutted to limit; specifically, the method comprises the following steps: the valve core 4 is in an inverted circular truncated cone shape, and the diameter of the end face of the lower end of the valve core 4 is smaller than that of the limiting baffle 5.

In practical application, a through hole is formed in the insertion column 6 of the limit baffle 5, a bolt 7 penetrates through the through hole of the insertion column 6 of the limit baffle 5, the bolt 7 is spirally and fixedly connected to the bottom of the insertion groove at the lower end of the body 1, a first compression spring 8 sleeved on the bolt 7 is arranged in the insertion groove at the lower end of the body 1, and the first compression spring 8 elastically acts on the end part of the outer end of the insertion column 6 of the limit baffle 5.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A stop valve screw rod comprises a cylindrical body (1), a connecting part (2) which is axially arranged in a cylindrical shape is arranged at the upper end of the body (1), the outer wall of the connecting part (2) is circumferentially distributed with axially arranged latch teeth (3) at intervals, the lower end of the body (1) is provided with a valve core (4), it is characterized in that the valve core (4) is provided with an assembling through hole, the valve core (4) is sleeved at the lower end of the body (1) through the assembling through hole, the valve core (4) is in axial sliding fit with the body (1), a baffle ring is arranged on the outer wall of the lower end of the body (1), an elastic part is arranged between the valve core (4) and the baffle ring, the valve core (4) is axially and elastically abutted and matched with the baffle ring through the elastic piece, and a limiting structure for preventing the valve core (4) from axially separating from the lower end of the body (1) is further arranged between the valve core (4) and the body (1).

2. The stop valve screw rod according to claim 1, wherein the limiting structure comprises a limiting baffle (5), the limiting baffle (5) is of a circular structure, an insertion column (6) is arranged in the middle of the upper end of the limiting baffle (5), an insertion groove is formed in the end face of the lower end of the body (1), the insertion column (6) of the limiting baffle (5) is axially inserted and assembled in the insertion groove of the lower end of the body (1), and the lower end of the valve core (4) and the limiting baffle (5) are axially abutted to limit.

3. The stop valve screw rod according to claim 2, characterized in that the valve core (4) is in an inverted frustum shape, and the diameter of the lower end surface of the valve core (4) is smaller than that of the limit baffle (5).

4. The stop valve screw rod according to claim 3, wherein a through hole is formed in the insertion column (6) of the limit baffle (5), a bolt (7) penetrates through the through hole of the insertion column (6) of the limit baffle (5), the bolt (7) is spirally and fixedly connected to the bottom of the insertion groove at the lower end of the body (1), a first compression spring (8) sleeved on the bolt (7) is arranged in the insertion groove at the lower end of the body (1), and the first compression spring (8) elastically acts on the end part of the outer end of the insertion column (6) of the limit baffle (5).

5. The stop valve screw rod according to claim 4, wherein inner ribs (9) axially arranged are circumferentially distributed on the inner wall of the assembling through hole of the valve core (4) at intervals, outer grooves axially arranged are circumferentially distributed on the outer wall of the lower end of the body (1) at intervals, and the inner ribs (9) of the valve core (4) and the outer grooves of the body (1) are axially and correspondingly assembled in a sliding manner respectively.

6. The stop valve screw mandrel according to claim 5, wherein the baffle ring comprises an annular sleeve (10) which is arranged at the lower end of the body (1) in an expanding manner, a downward turning edge (11) which is arranged in an outward turning manner is arranged at the lower end of the annular sleeve (10), the downward turning edge (11) and the annular sleeve (10) are manufactured into an integral structure, and reinforcing plates (12) which are arranged in a radial manner are circumferentially distributed at intervals between the downward turning edge (11) and the annular sleeve (10).

7. The stop valve screw rod according to claim 6, wherein the elastic member is a second compression spring (13), a spring groove is formed in the middle of the upper end face of the valve core (4), the second compression spring (13) is sleeved at the lower end of the body (1) and is arranged in the spring groove, the lower end of the second compression spring (13) is elastically abutted against the groove bottom of the spring groove of the valve core (4), and the upper end of the second compression spring (13) is elastically abutted against the downward turning edge (11).