Valve with double-sealing structure

Abstract

The invention discloses a double-seal structure type valve which comprises a valve body, the valve body comprises a transverse water outlet channel, a vertical water guide pipeline is integrally formed at the end of the transverse water outlet channel, a water inlet channel is integrally formed in the upper portion of the side wall of the vertical water guide pipeline, and a valve deck is fixed to the top of the vertical water guide pipeline through a screw. An internal thread cavity with an opening in the top face is integrally formed in the bottom of the valve body, the vertical water guide pipeline comprises an upper water guide pipe body, a middle water guide pipe body and a lower water guide pipe body, an internal thread groove is formed in the inner wall of the lower water guide pipe body, and a valve rod is arranged in the vertical water guide pipeline; a threaded rod portion matched with the lower water guide pipe body is integrally formed at the bottom end of the valve rod, a plunger is fixed to the middle of the threaded rod portion, and a piston body is arranged on the upper portion of the valve rod. According to the double-sealing plunger valve, the structural arrangement is reasonable, double sealing is achieved through the piston body and the plunger, the valve rod can be prevented from deviating or inclining, the using stability and reliability are improved, and the applicability and practicability are high.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a double-sealing structure valve. Background Art

[0002] A valve is a control component in a fluid delivery system, which has functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shutoff valve to various valves used in extremely complex automatic control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. However, existing valves generally have shortcomings, for example, the sealing of the valve is not good, and water leaks after the valve is closed. Chinese Patent 201810983061.2 discloses a valve, which includes a valve body, a hand wheel and a valve cover. An inlet pipe is arranged on the outer side of the lower end of the valve body, and the inlet pipe and the upper surface are connected with the outer side surface of the upper end of the valve body through a return pipe. An outlet pipe is fixedly installed on the bottom of the valve body by screws, and an internal thread is arranged on the inner wall of one end of the outlet pipe connected with the inside of the valve body. A threaded rod is embedded in the interior of the valve body, and a plunger is arranged at the end of the threaded rod. A piston is arranged on the threaded rod, which raises and lowers the plunger at the end of the outlet pipe connected with the valve body through the rotation of the threaded rod, so as to realize the connection or disconnection of the outlet pipe and the inlet pipe. Although it can meet the use requirements, it is not only inconvenient to operate, but also under the action of the spring, when the outlet pipe and the inlet pipe are connected, the threaded rod is still in the internal thread, which will affect the normal conduction of the valve and the normal use, and the applicability and practicality are limited. Summary of the invention

[0003] The purpose of the present invention is to provide a double-sealing structure valve with reasonable structural arrangement and strong applicability.

[0004] The technical solution to achieve the purpose of the present invention is a double-seal structure valve, including a valve body, the valve body including a transverse water outlet channel, a vertical water guide pipe is integrally formed at the end of the transverse water outlet channel, a water inlet channel is integrally formed at the upper part of the side wall of the vertical water guide pipe, a valve cover is fixed to the top of the vertical water guide pipe by a screw, and an internal thread cavity with an open top surface is integrally formed at the bottom of the valve body, and the internal thread cavity is located directly below the vertical water guide pipe;

[0005] The vertical water pipe includes an upper water pipe body, a middle water pipe body and a lower water pipe body, the diameter of the middle water pipe body is larger than the diameter of the upper water pipe body, the diameter of the lower water pipe body is smaller than the diameter of the upper water pipe body, and the diameter of the lower water pipe body is the same as the inner diameter of the internal thread cavity;

[0006] An internal thread groove is provided on the inner wall of the lower water pipe body, and the water inlet channel is connected with the upper water pipe body;

[0007] A valve stem is arranged in the vertical water conduit, a threaded rod portion matching the lower water conduit body is integrally formed at the bottom end of the valve stem, and a plunger is fixed in the middle of the threaded rod portion;

[0008] A piston body is arranged on the upper part of the valve stem, and the inner diameter of the piston body is the same as that of the upper water conduit body;

[0009] When the threaded rod rotates, the plunger is at the bottom of the lower water pipe body to seal, and the piston body is in the upper water pipe body to achieve sealing;

[0010] When the threaded rod rotates, the lower part enters the internal thread cavity and the upper part of the threaded rod is separated from the lower water pipe body, and the piston body enters the middle water pipe. At this time, the water inlet channel, the vertical water pipe and the horizontal water outlet channel are connected.

[0011] Further preferably, the height of the threaded rod is the same as the height of the transverse water outlet channel, the lower part of the threaded rod is threaded into the inner groove cavity, and the upper part of the threaded rod is separated from the lower water guide pipe body.

[0012] It is further preferred that a return pipe is provided between the internal thread cavity and the transverse water outlet channel.

[0013] Further preferably, a pressure spring is arranged between the bottom wall of the internal thread cavity and the bottom surface of the threaded rod portion.

[0014] Further preferably, a drainage hole communicating with the internal thread cavity is provided on the bottom surface of the valve body, a T-shaped plug is provided in the drainage hole, and a vertical portion of the T-shaped plug is smaller than an inner diameter of the drainage hole;

[0015] During drainage, external force pushes the T-shaped plug upwards so that the transverse portion of the T-shaped plug is separated from the bottom wall of the internal thread cavity.

[0016] Further preferably, a pressing hole is provided on the bottom surface of the threaded rod, a pressing column is provided in the pressing hole, and a buffer spring is provided between the pressing column and the top wall of the pressing hole;

[0017] The bottom end of the pressing column is pressed against the top surface of the T-shaped plug under the action of the buffer spring.

[0018] It is further preferred that a sealing collar is provided between the valve cover and the top surface of the valve body.

[0019] The present invention has positive effects: the structure of the present invention is reasonably arranged, and a plunger is provided to cooperate with a piston body. When the threaded valve stem is threaded up and down, double sealing can be achieved through the piston body and the plunger to avoid water leakage. At the same time, when the threaded valve stem moves downward, it will be threadedly connected in the internal thread cavity, thereby preventing the valve stem from being displaced or tilted, and the threaded valve stem can be completely detached from the lower water conduit body, which will not affect the normal liquid circulation, is conducive to improving the stability and reliability of use, and has strong applicability and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the specific structure of the valve stem, threaded rod portion, plunger and piston body in the present invention;

[0023] Figure 3 It is a schematic diagram of the specific structure of the T-shaped plugging and pressing column in the present invention.

[0024] Figure numerals: valve body 3, horizontal water outlet channel 31, vertical water guide pipe 32, water inlet channel 33, screw 1, valve cover 2, internal thread cavity 4, vertical water guide pipe 32, upper water guide pipe body 321, middle water guide pipe body 322, lower water guide pipe body 323, internal thread groove 5, valve stem 6, threaded rod portion 7, plunger 8, piston body 9, return pipe 10, pressure spring 11, drain hole 12, T-shaped plug 13, pressure hole 14, pressure column 15, buffer spring 16, sealing clamp 17. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example

[0027] See Figures 1 to 3As shown, a double-seal structure valve includes a valve body 3, and the valve body includes a horizontal water outlet channel 31. In this embodiment, the valve body is a conventional structure of the prior art and is simply applied. At the same time, a vertical water guide pipe 32 is integrally formed at the end of the horizontal water outlet channel, and a water inlet channel 33 is integrally formed on the upper part of the side wall of the vertical water guide pipe. A valve cover 2 is fixed to the top of the vertical water guide pipe by a screw 1, and an internal thread cavity 4 with a top surface opening is integrally formed at the bottom of the valve body. The internal thread cavity is located directly below the vertical water guide pipe. The vertical water guide pipe 32 includes an upper water guide pipe body 321, a middle water guide pipe body 322 and A lower water pipe body 323, wherein the diameter of the middle water pipe body is larger than the diameter of the upper water pipe body, the diameter of the lower water pipe body is smaller than the diameter of the upper water pipe body and the diameter of the lower water pipe body is the same as the inner diameter of the internal thread cavity, an internal thread groove 5 is provided on the inner wall of the lower water pipe body, the water inlet channel is connected with the upper water pipe body, a valve stem 6 is provided in the vertical water pipe, a threaded rod portion 7 matching the lower water pipe body is integrally formed at the bottom end of the valve stem, a plunger 8 is fixed in the middle of the threaded rod portion, a piston body 9 is provided on the upper part of the valve stem, and the piston body has the same inner diameter as the upper water pipe body;

[0028] In this embodiment, in order to ensure stability and reliability in use, in actual application, the height of the threaded rod is the same as the height of the horizontal water outlet channel, the lower part of the threaded rod is threaded into the inner groove cavity, and the upper part of the threaded rod is detached from the lower water conduit body.

[0029] During use, the working principle of this embodiment is briefly described as follows: when the threaded rod rotates, the plunger is at the bottom of the lower water pipe body to seal, and the piston body is in the upper water pipe body to achieve sealing. When the threaded rod rotates, the lower part enters the internal thread cavity and the upper part of the threaded rod is detached from the lower water pipe body, and the piston body enters the middle water pipe. At this time, the water inlet channel, the vertical water pipe and the horizontal water outlet channel are connected.

[0030] A reflux pipe 10 is provided between the internal thread cavity and the transverse water outlet channel. A reflux operation can be achieved through the reflux pipe.

[0031] A pressure spring 11 is arranged between the bottom wall of the internal thread cavity and the bottom surface of the threaded rod portion. The pressure spring can realize operations such as force storage.

[0032] A drainage hole 12 connected to the internal thread cavity is opened on the bottom surface of the valve body, and a T-shaped plug 13 is arranged in the drainage hole, and the vertical part of the T-shaped plug is smaller than the inner diameter of the drainage hole; during use, when draining water, the external force pushes the T-shaped plug upward to separate the horizontal part of the T-shaped plug from the bottom wall of the internal thread cavity, so that water is in an open state from the T-shaped plug to realize the drainage operation.

[0033] In actual use, a pressing hole 14 is provided on the bottom surface of the threaded rod, a pressing column 15 is provided in the pressing hole, a buffer spring 16 is provided between the pressing column and the top wall of the pressing hole, and the bottom end of the pressing column presses against the top surface of the T-shaped plug under the action of the buffer spring. The elastic action of the buffer spring ensures that the bottom end of the pressing column presses against the top surface of the T-shaped plug, thereby ensuring the reliability of the T-shaped plug.

[0034] A sealing collar 17 is provided between the valve cover and the top surface of the valve body.

[0035] The structure of the present invention is reasonably arranged, and a plunger is provided to cooperate with a piston body. When the threaded valve stem is threaded up and down, double sealing can be achieved through the piston body and the plunger to avoid water leakage. At the same time, when the threaded valve stem moves downward, it will be threadedly connected in the internal thread cavity, thereby preventing the valve stem from being offset or tilted, and also allowing the threaded valve stem to be completely detached from the lower water conduit body, which will not affect the normal liquid circulation, is conducive to improving the stability and reliability of use, and has strong applicability and good practicality.

[0036] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A double-seal structure valve, comprising a valve body, the valve body comprising a transverse water outlet channel, a vertical water guide pipe integrally formed at the end of the transverse water outlet channel, a water inlet channel integrally formed at the upper part of the side wall of the vertical water guide pipe, a valve cover fixed to the top of the vertical water guide pipe by a screw, characterized in that: An internal thread cavity with an open top surface is integrally formed at the bottom of the valve body, and the internal thread cavity is located directly below the vertical water guide pipe; The vertical water pipe includes an upper water pipe body, a middle water pipe body and a lower water pipe body, the diameter of the middle water pipe body is larger than the diameter of the upper water pipe body, the diameter of the lower water pipe body is smaller than the diameter of the upper water pipe body, and the diameter of the lower water pipe body is the same as the inner diameter of the internal thread cavity; An internal thread groove is provided on the inner wall of the lower water pipe body, and the water inlet channel is connected with the upper water pipe body; A valve stem is arranged in the vertical water conduit, a threaded rod portion matching the lower water conduit body is integrally formed at the bottom end of the valve stem, and a plunger is fixed in the middle of the threaded rod portion; A piston body is arranged on the upper part of the valve stem, and the inner diameter of the piston body is the same as that of the upper water conduit body; When the threaded rod rotates, the plunger is at the bottom of the lower water pipe body to seal, and the piston body is in the upper water pipe body to achieve sealing; When the threaded rod rotates, the lower part enters the internal thread cavity and the upper part of the threaded rod is separated from the lower water pipe body, and the piston body enters the middle water pipe. At this time, the water inlet channel, the vertical water pipe and the horizontal water outlet channel are connected.

2. The double sealing structure valve according to claim 1, characterized in that: The height of the threaded rod is the same as that of the transverse water outlet channel. The lower part of the threaded rod is threaded into the inner groove cavity, and the upper part of the threaded rod is separated from the lower water guide pipe body.

3. The double sealing structure valve according to claim 2, characterized in that: A return pipe is arranged between the internal thread cavity and the transverse water outlet channel.

4. The double sealing structure valve according to claim 3, characterized in that: A pressure spring is arranged between the bottom wall of the internal thread cavity and the bottom surface of the threaded rod portion.

5. The double sealing structure valve according to claim 4, characterized in that: A drainage hole communicating with the internal thread cavity is provided on the bottom surface of the valve body, a T-shaped plug is provided in the drainage hole, and a vertical portion of the T-shaped plug is smaller than an inner diameter of the drainage hole; During drainage, external force pushes the T-shaped plug upwards so that the transverse portion of the T-shaped plug is separated from the bottom wall of the internal thread cavity.

6. The double sealing structure valve according to claim 5, characterized in that: A pressing hole is arranged on the bottom surface of the threaded rod, a pressing column is arranged in the pressing hole, and a buffer spring is arranged between the pressing column and the top wall of the pressing hole; The bottom end of the pressing column is pressed against the top surface of the T-shaped plug under the action of the buffer spring.

7. The double sealing structure valve according to claim 6, characterized in that: A sealing collar is arranged between the valve cover and the top surface of the valve body.

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