High-pressure sealing ball valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a high-pressure sealing ball valve. The valve rod is arranged on the valve body, and one end of the valve rod is inserted into the valve body; the sealing filler is arranged between the valve rod and the valve body; the first sealing mechanism is arranged between the valve rod and the sealing filler and comprises a first sealing groove, a second sealing groove and a fluid receiving groove, the first sealing groove is formed between the sealing filler and the valve rod, a first sealing ring is arranged in the first sealing groove, and the second sealing groove is formed below the first sealing groove; a first sealing ring is arranged in the first sealing groove, a second sealing ring is arranged in the second sealing groove, the fluid receiving groove is arranged between the first sealing groove and the second sealing groove, sealing fluid is arranged in the fluid receiving groove, and the fluid receiving groove is communicated with the first sealing groove and the second sealing groove. The utility model has the beneficial effects that the sealing performance is stronger, the stability of the sealing performance can be kept in a high-pressure environment, and the transmitted medium is prevented from leaking and polluting the environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, especially point to a kind of high-pressure sealed ball valve. BACKGROUND

[0002] Ball valve as a kind of common valve in industrial production and daily life, the closing piece is spherical body, spherical body rotates around the heart line of valve body to achieve the purpose of opening and closing, with small fluid resistance, simple structure, small volume, light weight, high reliability, easy operation and so on, use very widely.Ball valve usually includes valve body, spherical body, valve stem and handle, ball valve in working process, handheld handle drives spherical body to rotate, realizes the opening and closure of ball valve.

[0003] However, the sealing performance of the existing ball valve is poor in high-pressure environment, and the fluid medium passing through the ball valve is easy to leak from the valve stem, causing environmental pollution. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of high-pressure sealed ball valve, with strong sealing performance, can keep the stability of sealing performance under high-pressure environment, prevent the leakage of medium transmission, pollute environment.

[0005] The utility model aims at realizing as follows: a kind of high-pressure sealed ball valve, comprising:

[0006] Valve body;

[0007] Valve stem, it is set up on the valve body, the valve stem one end is inserted into the valve body;

[0008] Sealing packing, it is set up between the valve stem and the valve body;

[0009] First sealing mechanism, it is set up between the valve stem and the sealing packing, the first sealing mechanism includes first sealing groove, second sealing groove and fluid receiving groove, the first sealing groove is set up between the sealing packing and the valve stem, first sealing ring is equipped in the first sealing groove, the second sealing groove is set up below the first sealing groove, second sealing ring is equipped in the second sealing groove, the fluid receiving groove is set up between the first sealing groove and the second sealing groove, sealing fluid is equipped in the fluid receiving groove, the fluid receiving groove is communicated with the first sealing groove and second sealing groove.

[0010] The utility model is further provided with: fluid passage is equipped between the first sealing groove and the fluid receiving groove and between the second sealing groove and the fluid receiving groove.

[0011] The utility model is further provided with:

[0012] A valve ball is arranged in the valve body, and the bottom of the valve rod is connected with the valve ball.

[0013] Valve seats are arranged on both sides of the valve ball.

[0014] A second sealing mechanism is arranged between the valve seats and the valve ball.

[0015] The utility model further sets up: the second sealing mechanism includes:

[0016] A third sealing ring is arranged at one end of the valve seat towards the valve ball, and one end of the third sealing ring is in abutment with the valve seat, and the other end is in abutment with the valve ball.

[0017] The utility model further sets up: the second sealing mechanism further includes:

[0018] An abutment groove is arranged between the valve seat and the valve body.

[0019] An elastic member is arranged in the abutment groove, one end of the elastic member is in abutment with the valve body, and the other end is in abutment with the valve seat.

[0020] The utility model further sets up: the first sealing ring is O-shaped sealing ring, and the second sealing ring is V-shaped sealing ring.

[0021] The utility model further sets up: a handle is arranged on the valve rod.

[0022] By adopting the above technical scheme, the utility model has at least the following beneficial effects:

[0023] 1. A sealing filler is arranged between the valve body and the valve rod, a first sealing mechanism is arranged between the sealing filler and the valve rod, the first sealing mechanism includes a first sealing groove, a second sealing groove and a fluid receiving groove, the fluid receiving groove is arranged between the first sealing groove and the second sealing groove, the fluid receiving groove is filled with sealing fluid, a first sealing ring is arranged in the first sealing groove, a second sealing ring is arranged in the second sealing groove, the sealing fluid can flow between the first sealing ring and the second sealing ring, the first sealing ring, the second sealing ring and the sealing fluid cooperate to effectively seal the valve rod, prevent fluid medium from leaking through the valve rod when passing through the valve body, and pollute the environment, in a high-pressure environment, the sealing fluid can better fill the gap between the valve rod and the first sealing mechanism, and pressure balance is formed, thereby improving the sealing performance of the ball valve under high pressure and preventing medium leakage.

[0024] 2. The valve stem controls the opening and closing of the ball valve by rotating, and the valve stem will rub against the first sealing mechanism when rotating, and the sealing fluid can fill the gap between the first sealing mechanism and the valve stem, thereby effectively reducing the friction resistance of the valve stem when rotating, reducing the torque required when controlling the ball valve, thereby making the opening and closing of the ball valve smoother and improving the working efficiency of the ball valve.

[0025] 3. The fluid receiving groove is arranged between the first sealing groove and the second sealing groove, and fluid channels are arranged between the fluid receiving groove, the first sealing groove and the second sealing groove, and the sealing fluid can flow in the fluid channels, and after long-term use, the sealing fluid will be consumed, and the fluid receiving groove can supplement the consumed sealing fluid, thereby maintaining the sealing performance of the ball valve and prolonging the service life of the ball valve.

[0026] 4. The second sealing mechanism is arranged on both sides of the valve ball, and since the valve ball is rotated for a long time, the third sealing ring will be damaged or loose, resulting in reduced sealing performance, and the abutting groove is arranged on the valve seat, and the elastic member is arranged in the abutting groove, and the elastic member, the valve seat and the third sealing ring cooperate, and the elastic member can provide elastic force to the third sealing ring, thereby improving the sealing performance of the third sealing ring, and when the third sealing ring is loose, the elastic member can provide elastic compensation to the third sealing ring, thereby effectively prolonging the service life of the third sealing ring. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a sectional view of the high-pressure sealing ball valve of the utility model;

[0028] Figure 2 is an enlarged view of part A of the utility model;

[0029] Figure 3 is an enlarged view of part B of the utility model;

[0030] In the drawings, the reference signs are: 1-valve body, 2-valve stem, 3-sealing filler, 11-valve ball, 12-valve seat, 21-handle, 41-first sealing groove, 42-second sealing groove, 43-fluid receiving groove, 44-first sealing ring, 45-second sealing ring, 46-sealing fluid, 47-fluid channel, 51-third sealing ring, 52-abutting groove, 53-elastic member. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the application will be clearly described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the application.

[0032] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be considered as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further described in subsequent drawings.

[0033] The utility model will be further described in specific embodiments in combination with the drawings, referring to Figures 1-3 :

[0034] Embodiment one.

[0035] The embodiment provides a high-pressure sealed ball valve, comprising:

[0036] The valve body 1;

[0037] The valve stem 2 is arranged on the valve body 1, and one end of the valve stem 2 is inserted into the valve body 1;

[0038] The sealing filler 3 is arranged between the valve stem 2 and the valve body 1;

[0039] The first sealing mechanism is arranged between the valve stem 2 and the sealing filler 3, and the first sealing mechanism comprises a first sealing groove 41, a second sealing groove 42 and a fluid receiving groove 43, the first sealing groove 41 is arranged between the sealing filler 3 and the valve stem 2, the first sealing groove 41 is provided with a first sealing ring 44, the second sealing groove 42 is arranged below the first sealing groove 41, the second sealing groove 42 is provided with a second sealing ring 45, the fluid receiving groove 43 is arranged between the first sealing groove 41 and the second sealing groove 42, the fluid receiving groove 43 is provided with a sealing fluid 46, and the fluid receiving groove 43 is in communication with the first sealing groove 41 and the second sealing groove 42.

[0040] As Figures 1-3 shown, the flow channel is arranged in the valve body 1, so that the liquid medium can pass through, the valve stem 2 is arranged on the valve body 1, one end of the valve stem 2 is inserted into the valve body 1, and the other end is arranged outside the valve body 1, and the valve stem 2 is used to control the opening and closing of the ball valve.

[0041] A sealing filler 3 is arranged between the valve body 1 and the valve stem 2, and a first sealing mechanism is arranged between the sealing filler 3 and the valve stem 2, the first sealing mechanism comprising a first sealing groove 41, a second sealing groove 42, and a fluid receiving groove 43 arranged between the first sealing groove 41 and the second sealing groove 42, the fluid receiving groove 43 being filled with a sealing fluid 46, the first sealing groove 41 being provided with a first sealing ring 44, the second sealing groove 42 being provided with a second sealing ring 45, the sealing fluid 46 being able to flow between the first sealing ring 44 and the second sealing ring 45, the first sealing ring 44, the second sealing ring 45, and the sealing fluid 46 cooperating to effectively seal the valve stem 2, preventing fluid medium from leaking from the valve stem 2 when passing through the valve body 1 and polluting the environment.

[0042] Under high pressure, the sealing fluid 46 can better fill the gap between the valve stem 2 and the first sealing mechanism, and evenly distribute the pressure to the valve stem 2, forming a pressure balance, avoiding excessive local pressure that can damage the sealing structure, thereby improving the sealing performance of the ball valve under high pressure and preventing medium leakage.

[0043] The valve stem 2 is rotationally connected to the sealing filler 3, and the valve stem 2 controls the opening and closing of the ball valve by rotating, and the valve stem 2 will rub against the first sealing mechanism when rotating, and the sealing fluid 46 can fill the gap between the first sealing mechanism and the valve stem 2, thereby effectively reducing the friction resistance of the valve stem 2 when rotating, reducing the torque required to control the ball valve, thereby making the opening and closing of the ball valve smoother and improving the working efficiency of the ball valve.

[0044] The fluid receiving groove 43 is arranged between the first sealing groove 41 and the second sealing groove 42, and the fluid receiving groove 43 is in communication with the first sealing groove 41 and the second sealing groove 42, and the sealing fluid 46 can flow in the first sealing groove 41, the second sealing groove 42, and the fluid receiving groove 43, and the fluid receiving groove 43 can replenish the consumed sealing fluid 46, thereby maintaining the sealing performance of the ball valve and prolonging the service life of the ball valve.

[0045] The second sealing mechanism is arranged in the valve body 1, and the second sealing mechanism is used to seal the flow passage of the valve body 1.

[0046] The valve body 1 is provided with a packing gland arranged above the sealing filler 3, and the packing gland is connected to the valve body 1 by bolts.

[0047] The sealing fluid 46 is made of lithium-based lubricating grease, which has good water resistance and can effectively prevent water leakage when used in a humid environment or when conveying water medium. At the same time, it maintains good lubricating performance and reduces friction when the valve stem 2 rotates. The lithium-based lubricating grease also has good mechanical stability and oxidation stability, and can maintain stable performance during long-term use, even if the valve is frequently operated.

[0048] The sealing fluid 46 can be filled in the fluid receiving groove 43 before the sealing packing 3 is installed.

[0049] Embodiment two:

[0050] The high-pressure sealing ball valve provided in the embodiment further has the following technical features in addition to the technical solutions of the above embodiments.

[0051] The fluid passage 47 is arranged between the first sealing groove 41 and the fluid receiving groove 43 and between the second sealing groove 42 and the fluid receiving groove 43.

[0052] As shown in Figures 1-2 , the fluid receiving groove 43 is arranged between the first sealing groove 41 and the second sealing groove 42, and the fluid passage 47 is arranged between the fluid receiving groove 43 and the first sealing groove 41 and the second sealing groove 42. The sealing fluid 46 can flow in the fluid passage 47. After long-term use, the sealing fluid 46 will be consumed, and the fluid receiving groove 43 can supplement the consumed sealing fluid 46, thereby maintaining the sealing performance of the ball valve and prolonging the service life of the ball valve.

[0053] Further comprising:

[0054] The valve ball 11 is arranged in the valve body 1, and the bottom of the valve stem 2 is connected with the valve ball 11.

[0055] The valve seat 12 is arranged on both sides of the valve ball 11.

[0056] The second sealing mechanism is arranged between the valve seat 12 and the valve ball 11.

[0057] As shown in Figure 1 , 3 , the bottom of the valve stem 2 is inserted into the valve ball 11 and connected with the valve ball 11. The valve ball 11 is arranged in the valve body 1, and the valve stem 2 controls the opening and closing of the ball valve by controlling the rotation of the valve ball 11.

[0058] The valve seat 12 is arranged on both sides of the valve ball 11, and the valve seat 12 can be used to support and stabilize the valve ball 11, so that the valve ball 11 can be rotated in the correct position. The valve ball 11 can be stably rotated to open and close the valve under the support of the valve seat 12, so as to ensure the normal function of the ball valve. At the same time, the valve seat 12 can evenly share the weight of the valve ball 11, prevent the valve ball 11 from deviating due to gravity, and improve the stability of the valve ball 11 during work.

[0059] The second sealing mechanism comprises:

[0060] The third sealing ring 51 is arranged at one end of the valve seat 12 facing the valve ball 11, and one end of the third sealing ring 51 abuts against the valve seat 12, and the other end abuts against the valve ball 11.

[0061] As shown in Figure 1 , 3 , the third sealing ring 51 can cooperate with the valve ball 11 to prevent liquid medium from passing through when the valve is closed. When the ball valve is closed, the valve ball 11 is rotated to the position of the valve seat 12, and the third sealing ring 51 can be attached to the surface of the valve ball 11. By forming a sealing barrier through its own sealing structure, it can prevent medium leakage and improve the safety and stability of the ball valve.

[0062] The second sealing mechanism further comprises:

[0063] The abutting groove 52 is arranged between the valve seat 12 and the valve body 1;

[0064] The elastic member 53 is arranged in the abutting groove 52, one end of the elastic member 53 abuts against the valve body 1, and the other end abuts against the valve seat 12.

[0065] As shown in Figure 1 , 3 , since the valve ball 11 is rotated for a long time, the third sealing ring 51 may be damaged or loose, resulting in reduced sealing performance. The abutting groove 52 is arranged between the valve seat 12 and the valve body 1, and the elastic member 53 is arranged in the abutting groove 52. The elastic member 53, the valve seat 12 and the third sealing ring 51 cooperate, the elastic member 53 can generate a elastic force to the valve seat 12 in the direction of the valve ball 11, the valve seat 12 transmits the elastic force to the third sealing ring 51, so that the contact between the third sealing ring 51 and the valve ball 11 is more closely, thereby improving the sealing performance of the third sealing ring 51. When the third sealing ring 51 is loose, the elastic member 53 can provide elastic compensation for the third sealing ring 51, thereby effectively prolonging the service life of the third sealing ring 51.

[0066] Furthermore, the ball valve is subject to various forces and deformations under different operating environments. In high-temperature environments, the metal material will undergo dimensional changes due to thermal expansion; in high-pressure environments, the ball and valve seat 12 will be subjected to significant pressure, resulting in slight deformation. The elastic element 53 can adapt to these deformations and provide elastic compensation, ensuring close contact between the third sealing ring 51 and the valve ball 11, thereby ensuring that the valve's sealing performance is not affected.

[0067] Example 3:

[0068] This embodiment provides a high-pressure sealing ball valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0069] The first sealing ring 44 is an O-ring, and the second sealing ring 45 is a V-ring.

[0070] like Figures 1-2 As shown, during installation and use, O-rings generate friction with the sealing surface. The sealing fluid 46 forms a lubricating layer between the O-ring and the sealing surface, reducing friction and allowing the O-ring to move more smoothly, thus reducing wear. This extends the service life of the O-ring, reduces equipment energy consumption and noise, and improves the overall performance and efficiency of the equipment.

[0071] The sealing fluid 46 can fill the tiny gap between the V-shaped sealing ring and the sealing surface, further preventing media leakage. When the media pressure increases, the lip of the V-shaped sealing ring fits more tightly with the sealing surface. At this time, the sealing fluid 46 is also subjected to pressure, filling the gap more tightly, forming a double sealing guarantee, which greatly improves the reliability of the seal, thereby improving the sealing ability of the ball valve in high-pressure and high-temperature environments.

[0072] A handle 21 is provided on the valve stem 2.

[0073] like Figure 1 As shown, the handle 21 is connected to the top of the valve stem 2. The handle 21 can be easily gripped by the user and increases the torque. The user can control the opening and closing of the ball valve through the handle 21.

[0074] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A high pressure seal ball valve characterized by, The utility model relates to a valve, which comprises: a valve body (1); a valve stem (2) arranged on the valve body (1) and inserted into the valve body (1) at one end; a sealing packing (3) arranged between the valve stem (2) and the valve body (1); a first sealing mechanism arranged between the valve stem (2) and the sealing packing (3), which comprises a first sealing groove (41), a second sealing groove (42) and a fluid receiving groove (43), the first sealing groove (41) is arranged between the sealing packing (3) and the valve stem (2), a first sealing ring (44) is arranged in the first sealing groove (41), the second sealing groove (42) is arranged below the first sealing groove (41), a second sealing ring (45) is arranged in the second sealing groove (42), the fluid receiving groove (43) is arranged between the first sealing groove (41) and the second sealing groove (42), a sealing fluid (46) is arranged in the fluid receiving groove (43), and the fluid receiving groove (43) is in communication with the first sealing groove (41) and the second sealing groove (42).

2. The high pressure seal ball valve of claim 1, wherein, Fluid channels (47) are arranged between the first sealing groove (41) and the fluid receiving groove (43) and between the second sealing groove (42) and the fluid receiving groove (43).

3. The high pressure seal ball valve of claim 1, wherein, The utility model further comprises: a valve ball (11) arranged in the valve body (1), the bottom of the valve stem (2) is connected with the valve ball (11); a valve seat (12) arranged on both sides of the valve ball (11); a second sealing mechanism arranged between the valve seat (12) and the valve ball (11).

4. The high pressure seal ball valve of claim 3, wherein, The second sealing mechanism comprises: a third sealing ring (51) arranged at one end of the valve seat (12) facing the valve ball (11), one end of the third sealing ring (51) is in abutment with the valve seat (12), and the other end is in abutment with the valve ball (11).

5. The high pressure seal ball valve of claim 4, wherein, The second sealing mechanism further comprises: an abutment groove (52) arranged between the valve seat (12) and the valve body (1); a resilient member (53) arranged in the abutment groove (52), one end of the resilient member (53) is in abutment with the valve body (1), and the other end is in abutment with the valve seat (12).

6. The high pressure seal ball valve of claim 1, wherein, The first sealing ring (44) is an O-shaped sealing ring, and the second sealing ring (45) is a V-shaped sealing ring.

7. The high pressure seal ball valve of claim 1, wherein, A handle (21) is arranged on the valve stem (2).

Images