CN221628904U

CN221628904U - Fixed torque integrated horizontal ball valve

Info

Publication number: CN221628904U
Application number: CN202420325490.1U
Authority: CN
Inventors: 陈耀; 缪茂乐; 池亚敏; 池志富; 池志翔
Original assignee: Zhejiang Guanzheng Valve Co ltd
Current assignee: Zhejiang Guanzheng Valve Co ltd
Priority date: 2024-02-22
Filing date: 2024-02-22
Publication date: 2024-08-30
Anticipated expiration: 2034-02-22

Abstract

The utility model discloses a fixed-torque integrated horizontal ball valve, belongs to the technical field of ball valves, and solves the problems that assembly quality is uneven in level and torque is not well improved. Comprising a valve body port with a flow passage. According to the utility model, the sleeve body can be displaced in the length direction of the sinking groove through the first-stage external thread and the second-stage external thread on the length direction of the flow passage and the internal thread on the inner peripheral wall of the sinking groove, so that the distance between the sleeve body serving as the valve seat and the bottom of the sinking groove can be changed, the acting force when the valve seat is in contact with the outer surface of the valve ball can be changed, once the valve seat is displaced towards the valve ball, the acting force on the surface of the valve ball can be increased, otherwise, the acting force on the valve ball can be smaller, and after the pretightening force is changed, the torque consumed by the valve shaft in the rotation process of the valve ball can be correspondingly adjusted, so that the problems of overlarge design margin, overlarge torque and the like are avoided.

Description

Fixed torque integrated horizontal ball valve

Technical Field

The utility model relates to the technical field of ball valves, in particular to a fixed-torque integrated horizontal ball valve.

Background

Ball valve designs have tended to mature. To reduce the cost, two-piece or three-piece ball valves have been developed. Under the condition of adapting to high-temperature and high-pressure environments, a fixed ball valve and a temperature-resistant pressure-resistant sealing valve seat are also developed successively. However, torque problems have limited the cost and quality of ball valves. High torque represents high cost of the actuator, lengthy operation time, and high maintenance costs. The high torque seriously affects the service life of the valve under various working conditions, greatly increases the failure risk of the valve, shortens the service life and increases the field maintenance cost. In a complex operating pipeline, the change of pipeline pressure influences the torque of the valve at any time. When encountering water hammer, abnormal high pressure can occur, so that the valve torque is too large, and the valve fails. Although the integrally forged upper-mounted ball valve has the advantages of on-line maintenance, integrally formed high quality and the like, the defects of time-consuming and complex manufacturing process and uneven final assembly quality level exist. In addition, the torque is not improved well, but rather the torque is excessively large with high probability due to the error problem of the production process. Meanwhile, the sealing pressure can change along with the pressure difference due to the traditional piston effect valve seat design, the torque is suddenly high and suddenly low, and the bearing capacity of the valve internals has great influence on the selection of an actuator. The upper limit of stress must be considered in design, which leads to excessive design margin of the final valve, but is theoretically unavoidable.

Ball valve designs have tended to mature, but two-piece or three-piece ball valves have been developed to accommodate high temperature and pressure environments for cost reduction. In order to adapt to the working conditions, a fixed ball valve and a temperature-resistant pressure-resistant sealing valve seat are also developed successively. However, the torque problem of ball valves has limited the cost and quality improvements. High torque means high actuator cost, long operating time and high maintenance costs. Meanwhile, the service life of the ball valve under various working conditions can be seriously influenced by high torque, the risk of valve failure is increased, the service life is shortened, and the cost of field maintenance is increased. In a complex operating pipeline, changes in pipeline pressure can affect the torque of the valve at any time. When a water hammer is encountered, the valve torque can increase abnormally, resulting in valve failure. Although the integrally forged upper-mounted ball valve has the advantages of on-line maintenance, high quality of integral molding and the like, the manufacturing process is time-consuming and complex, and the final assembly quality is uneven. In addition, the torque problem is not well improved, but the probability of too large a torque is rather high due to the error problem of the production process. Meanwhile, the traditional piston effect valve seat design causes the sealing pressure to change along with the change of the pressure difference, and the torque is high and low, which has great influence on the selection of an actuator and the bearing capacity of a valve internal part. The design must take into account the upper stress limit, which results in an excessive design margin for the final valve, which is theoretically unavoidable. Therefore, there is a need for further improvements in manufacturing processes to improve the quality and reliability of ball valves while solving the torque problem.

Therefore, a fixed torque integrated horizontal ball valve is provided to solve or alleviate the problems.

Disclosure of utility model

The utility model aims to solve the defects in the prior art, and provides a fixed-torque integrated lying ball valve.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model provides a decide moment of torsion integral type crouch dress ball valve, includes the valve body that has the runner, the top bottom surface of valve body has seted up respectively with the last import of runner intercommunication and lower import, go up import, lower import and runner intercommunication department and form globular space, still including rotating the valve ball of connecting in globular space, the coaxial fixedly connected with in the outside of valve ball runs through valve shaft and the guide post of import and lower import, just can dismantle in the runner and be connected with the disk seat that can follow runner length direction displacement, the disk seat is used for contradicting with the surface of valve ball, and works as when the disk seat displacement, the disk seat increases or reduces its valve ball effort of contradicting.

Preferably, the valve seat comprises a sleeve body which is in a tubular shape and is in sliding connection with the flow passage, and a primary sealing rubber ring, a sinking groove is formed at the communication part of the flow passage and the spherical space, the sleeve body is in sliding connection with the sinking groove, the shape of the sinking groove is identical to that of the sleeve body, the sleeve body is in an annular ladder shape, and the primary sealing rubber ring is sleeved at the junction of the first step and the second step of the sleeve body.

Preferably, the outer peripheral walls of the second step and the third step of the sleeve body are respectively provided with a first-stage external thread and a second-stage external thread, and the inner peripheral walls of the second step and the third step of the sinking groove are provided with internal threads in threaded connection with the first-stage external thread and the second-stage external thread.

Preferably, the valve seat further comprises a second-stage sealing rubber ring, the annular caulking groove is formed in the first step outer ring of the sleeve body, and the second-stage sealing rubber ring is fixedly connected in the annular caulking groove.

Preferably, the valve seat further comprises a sealing glue layer fixedly connected to the end face of the sleeve body, and the sealing glue layer is located on one side, away from the valve ball, of the sleeve body.

Preferably, the valve body is detachably connected with an upper sealing cover for sealing the upper inlet and allowing the valve shaft to penetrate through, and a lower sealing cover for sealing the lower inlet and allowing the guide post to penetrate through.

Preferably, the valve shaft comprises a three-stage transmission shaft, a two-stage transmission shaft and a one-stage transmission shaft which are integrally formed with the valve ball, the radiuses of the three-stage transmission shaft, the two-stage transmission shaft and the one-stage transmission shaft are sequentially reduced, and the valve shaft penetrates through the upper sealing cover and is sealed with the one-stage transmission shaft and the two-stage transmission shaft.

Preferably, the guide post comprises a secondary guide shaft, a primary guide shaft and a stepped shaft which are integrally formed with the valve ball, the radiuses of the secondary guide shaft, the primary guide shaft and the stepped shaft are sequentially reduced, and a plurality of steps are formed on the stepped shaft along the length direction of the stepped shaft.

The utility model has the following beneficial effects:

According to the utility model, the first-stage external thread and the second-stage external thread are in threaded connection with the internal thread on the inner peripheral wall of the sinking groove in the length direction of the flow passage through the valve seat, so that the displacement of the sleeve body in the length direction of the sinking groove is realized, the distance between the sleeve body and the bottom of the sinking groove is changed, and the contact force between the valve seat and the outer surface of the valve ball is adjusted. As the valve seat moves toward the valve ball, its force against the surface of the valve ball increases and vice versa decreases. Therefore, once the pretightening force is changed, the torque consumed by the valve shaft in the rotating process of the valve ball can be correspondingly adjusted, so that the problems of overlarge design margin, overlarge torque and the like are avoided.

The key point of the utility model is that the displacement of the sleeve body in the length direction of the sinking groove is realized by connecting the sleeve body of the valve seat with the sinking groove and utilizing the connection mode of the external thread and the internal thread. Therefore, the distance between the sleeve body and the bottom of the sinking groove can be adjusted according to the requirement, so that the contact force between the valve seat and the outer surface of the valve ball is changed. When the valve seat moves towards the valve ball, the acting force is increased, and the pressure on the surface of the valve ball is correspondingly increased; conversely, as the valve seat moves away from the valve ball, the force decreases and the pressure against the surface of the valve ball decreases accordingly.

The advantage of this design is that once the preload has changed, the torque consumed by the valve shaft during rotation of the valve ball can be adjusted accordingly. Thus, problems such as excessive design margin and excessive torque can be avoided. Through adjusting the contact force between the valve seat and the outer surface of the valve ball, the rotary motion of the valve ball can be ensured to be more stable, and the working efficiency and the service life of the valve are improved.

Therefore, the design thought and the mechanism of the utility model can effectively solve the problems existing in the traditional valve design and improve the performance and the reliability of the valve. The contact force between the valve seat and the valve ball can be flexibly adjusted by utilizing the displacement of the valve seat in the length direction of the flow channel, so that the automatic adjustment and optimization of the valve are realized. The design mode has wide application prospect and market value in the field of valves.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a valve seat according to the present utility model;

Fig. 3 is a schematic view of the structure of the valve ball and the upper and lower shafts of the present utility model.

1. A valve body; 2. a flow passage; 3. a valve seat; 31. a sleeve body; 32. an annular caulking groove; 33. a second-stage sealing rubber ring; 34. a first-stage external thread; 35. a secondary external thread; 4. a valve ball; 5. a guide post; 51. a secondary guide shaft; 52. a primary guide shaft; 53. a stepped shaft; 6. a valve shaft; 61. three-stage transmission shafts; 62. a secondary transmission shaft; 63. a primary transmission shaft; 7. an upper cover; 8. and (5) a lower sealing cover.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

A constant torque integrated horizontal ball valve, as shown in figure 1, comprises a valve body 1 with a flow channel 2, wherein the top and bottom surfaces of the valve body 1 are respectively provided with an upper inlet and a lower inlet which are communicated with the flow channel 2, the communication parts of the upper inlet and the lower inlet with the flow channel 2 form a spherical space,

The valve ball 4 in the spherical space is rotationally connected, the valve shaft 6 penetrating through the upper inlet and the lower inlet and the guide post 5 are coaxially and fixedly connected to the outer side of the valve ball 4, the valve seat 3 capable of being displaced along the length direction of the flow channel 2 is detachably connected in the flow channel 2, the valve seat 3 is used for abutting against the surface of the valve ball 4, and when the valve seat 3 is displaced, acting force of the valve seat 3 on the valve ball 4 abutting against the valve seat is increased or decreased.

As shown in fig. 2, the valve seat 3 includes a sleeve body 31, a second-stage sealing rubber ring 33, a first-stage sealing rubber ring and a sealing rubber layer fixedly connected to the end surface of the sleeve body 31, the sealing rubber layer is located at one side of the sleeve body 31 far away from the valve ball 4, a sinking groove is formed at the communication position of the ball space and the flow channel 2, the sleeve body 31 is slidably connected in the sinking groove, the sinking groove is identical to the sleeve body 31, the sleeve body 31 is in a ring-shaped ladder shape, the first-stage sealing rubber ring is sleeved at the junction of the first-stage ladder and the second-stage ladder of the sleeve body 31, a first-stage external thread 34 and a second-stage external thread 35 are respectively formed on the outer peripheral walls of the second-stage ladder and the third-stage ladder of the sleeve body 31, an internal thread connected with the first-stage external thread 34 and the second-stage external thread 35 is formed on the inner peripheral wall of the second-stage ladder of the sinking groove, the first-stage outer ring of the sleeve body 31 is formed with a ring-shaped embedding groove 32, and the second-stage sealing rubber ring 33 is fixedly connected in the ring-shaped embedding groove 32.

As shown in fig. 3, an upper sealing cover 7 for sealing an upper inlet and allowing a valve shaft 6 to penetrate through and a lower sealing cover 8 for sealing a lower inlet and allowing a guide post 5 to penetrate through are detachably connected to the valve body 1, the valve shaft 6 comprises a three-stage transmission shaft 61, a two-stage transmission shaft 62 and a one-stage transmission shaft 63 which are integrally formed with the valve ball 4, the radiuses of the three-stage transmission shaft 61, the two-stage transmission shaft 62 and the one-stage transmission shaft 63 are sequentially reduced, the valve shaft 6 penetrates through the upper sealing cover 7 and is hermetically arranged with the one-stage transmission shaft 63 and the two-stage transmission shaft 62, the guide post 5 comprises a two-stage guide shaft 51, a one-stage guide shaft 52 and a stepped shaft 53 which are integrally formed with the valve ball 4, the radiuses of the two-stage guide shaft 51, the one-stage guide shaft 52 and the stepped shaft 53 are sequentially reduced, and the stepped shaft 53 has a plurality of steps along the length direction thereof.

When an operator needs to assemble the ball valve, firstly, the sleeve body 31 is put into the valve body 1 through the lower inlet in a manual mode, and the sleeve body 31 can be put into the valve body 1 more easily and conveniently due to the fact that the opening of the lower inlet is larger than that of the upper inlet, and then the primary external thread 34 and the secondary external thread 35 on the sleeve body 31 are in threaded connection with the internal threads in the sinking groove.

Under normal state, the sleeve body 31 can extrude the sealant layer to make between its and the tank bottom of heavy groove can keep sealed state, and also can reserve some spaces and take place the displacement for sleeve body 31 in heavy groove, no matter the sleeve body 31 forward displacement or reverse the displacement, the sealant layer can remain the state of closely laminating with sleeve body 31 and heavy groove tank bottom all the time, with the sealed effect of this guarantee disk seat 3 and the junction of valve body 1, avoid runner 2 to appear leaking the problem because of disk seat 3's the reason.

Then the upper cover 7 is manually fixed at the upper inlet of the valve body 1 by bolts, and at the moment, the valve ball 4 and the valve shaft 6 integrally formed with the upper cover are made to pass through the valve body 1 by the lower inlet, the primary transmission shaft 63 of the valve shaft 6 can penetrate through the upper cover 7, and the secondary transmission shaft 62 of the valve shaft 6 can be embedded inside the upper cover 7, so that a stepped structure is formed, and a good sealing effect can be maintained when the valve shaft 6 penetrates through the upper cover 7.

In this way, the valve ball 4 can also be interposed between the valve seats 3 on both sides, i.e. in the spherical space, so that the valve seats 3 are in close contact with the surface of the sphere.

Finally, an operator assembles the lower sealing cover 8 through the bolts, and makes the guide post 5 penetrate through the lower sealing cover 8, mainly, the stepped shaft 53 penetrates through the lower sealing cover 8, and as the valve shaft 6 can be connected with the actuator, the transmission of force is realized, the rotation of the valve ball 4 in the circumferential direction is realized, the guide post 5 mainly plays a role in making the valve ball 4 more stable in the rotating process, when the valve ball 4 suffers from liquid impact or even water hammer phenomenon, the resistance to external acting force can be realized with stronger connecting strength, the problem of vibration of the valve ball 4 is avoided, the guide post 5 is inevitably connected with a groove body capable of accommodating the guide post, and the stepped shaft 53 with a plurality of steps can be in a state of a nearly truncated cone-shaped structure or even a cone-shaped structure, so that when the guide post rotates, the force bearing area of the guide post can be reduced as much as possible, and then the guide post is easy and labor-saving and stable.

Meanwhile, the valve body 1 is an integrated forged steel valve body 1 obtained through a linear machining process. Compared with the traditional valve body 1 processing technology, the linear processing technology can reduce the existence of leakage points and improve the quality of the whole blank. The machining process can ensure the integrity of the valve body 1 and avoid leakage problems possibly occurring in the assembly process of a plurality of parts. Therefore, the integrated forged steel valve body 1 has better sealing performance in use.

In addition, the product is different from the traditional valve rod vertical horizon, and adopts a main installation mode that the valve rod is parallel to the horizon. This design allows the pretension to be adjusted by the cooperation of the valve seat 3 with the valve ball 4, so that a torque is fixed in a specific situation. Compared with the traditional design, the installation mode of the valve rod parallel to the ground plane can reduce the sinking design and improve the cost performance of the product. At the same time, the design of fixed input torque can also reduce the cost of the actuator.

In this design, the torque is set to 1/3 of the same pressure size. The design can reduce the cost of the actuator while ensuring the fixed torque. Because the torque is set to 1/3 of the same pressure size, the size of the actuator can be smaller, thereby reducing material and manufacturing costs.

In summary, the integral forged steel valve body 1 obtained by the one-line processing technology has the characteristics of few leakage points and good overall blank quality. Unlike the traditional valve rod vertical horizon, the product adopts a main installation mode that the valve rod is parallel to the horizon, and the pretightening force is adjusted through the matching of the valve seat 3 and the valve ball 4, so that the torque is fixed under specific conditions. The torque is set to be 1/3 of the same pressure size while the torque is fixed, so that the cost of the actuator is greatly reduced. Thus, the valve body 1 of this design is more cost effective and provides better performance under certain conditions.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a fixed torque integral type crouches dress ball valve, its characterized in that, including valve body (1) that has runner (2), last import and lower import with runner (2) intercommunication have been seted up respectively to the top bottom surface of valve body (1), go up import, lower import and runner (2) intercommunication department and form globular space, still including rotating valve ball (4) of connecting in globular space, the coaxial fixedly connected with in the outside of valve ball (4) runs through valve shaft (6) and guide post (5) of import and lower import, just can dismantle in runner (2) and be connected with disk seat (3) that can follow runner (2) length direction displacement, disk seat (3) are used for contradicting with the surface of valve ball (4), and works as when disk seat (3) displacement, disk seat (3) effort to its conflicted valve ball (4) increases or reduces.

2. The constant-torque integrated lying ball valve according to claim 1, wherein the valve seat (3) comprises a sleeve body (31) which is slidably connected in the runner (2) and is tubular, and a primary sealing rubber ring, a sinking groove is formed at the communication position of the runner (2) and the spherical space, the sleeve body (31) is slidably connected in the sinking groove, the shape of the sinking groove is the same as that of the sleeve body (31), the sleeve body (31) is in an annular step shape, and the primary sealing rubber ring is sleeved at the junction of the first step and the second step of the sleeve body (31).

3. The constant torque integrated lying ball valve according to claim 2, wherein the outer peripheral walls of the second and third steps of the sleeve body (31) are respectively provided with a first-stage external thread (34) and a second-stage external thread (35), and the inner peripheral walls of the second and third steps of the sinking groove are provided with internal threads in threaded connection with the first-stage external thread (34) and the second-stage external thread (35).

4. A constant torque integrated lying ball valve according to claim 3, wherein the valve seat (3) further comprises a secondary sealing rubber ring (33), the first step outer ring of the sleeve body (31) is provided with an annular caulking groove (32), and the secondary sealing rubber ring (33) is fixedly connected in the annular caulking groove (32).

5. The constant torque integrated lying ball valve according to claim 2, wherein the valve seat (3) further comprises a sealing glue layer fixedly connected to the end face of the sleeve body (31), and the sealing glue layer is located on one side of the sleeve body (31) away from the valve ball (4).

6. The constant-torque integrated lying ball valve according to claim 1, wherein an upper sealing cover (7) for sealing an upper inlet and allowing a valve shaft (6) to penetrate and a lower sealing cover (8) for sealing a lower inlet and allowing a guide post (5) to penetrate are detachably connected to the valve body (1).

7. The constant torque integrated lying ball valve according to claim 6, wherein the valve shaft (6) comprises a three-stage transmission shaft (61), a two-stage transmission shaft (62) and a one-stage transmission shaft (63) which are integrally formed with the valve ball (4), the radiuses of the three-stage transmission shaft (61), the two-stage transmission shaft (62) and the one-stage transmission shaft (63) are sequentially reduced, and the valve shaft (6) penetrates through the upper sealing cover (7) and is in sealing arrangement with the one-stage transmission shaft (63) and the two-stage transmission shaft (62).

8. The constant torque integrated lying ball valve according to claim 6, wherein the guide post (5) comprises a secondary guide shaft (51), a primary guide shaft (52) and a stepped shaft (53) which are integrally formed with the valve ball (4), the radii of the secondary guide shaft (51), the primary guide shaft (52) and the stepped shaft (53) are sequentially reduced, and the stepped shaft (53) has a plurality of steps along the length direction thereof.