High-sealing ball valve

Abstract

The utility model relates to a high sealing ball valve which comprises a valve body, a valve rod, a valve ball fixedly connected with the valve rod, a left valve seat and a right valve seat, the valve ball is located in the valve body, the valve rod is installed on the valve body in a rotating mode, the left valve seat and the right valve seat are both located in the valve body, the left valve seat abuts against the left side of the valve ball, and the right valve seat abuts against the right side of the valve ball. The valve body comprises a left installation part located on the left side of the valve body and a right installation part located on the right side of the valve body, the left installation part and the right installation part are detachably connected, a positioning block is fixedly installed on the left side of the left valve seat and installed on the valve body in a sliding mode in the left-right direction, and a matching groove for the positioning block to slide is formed in the left installation part. According to the high-sealing ball valve, after abrasion occurs between the left valve seat and the valve ball, the left mounting part can be detached, and then the positioning block slides, so that the left valve seat moves rightwards to be tightly attached to the valve ball.

Description

Technical Field

[0001] The utility model relates to a ball valve, in particular to a high-sealing ball valve. Background Art

[0002] A ball valve is a kind of valve, and its opening and closing part (ball) is driven by a valve stem and rotates around the axis of the ball valve.

[0003] The ball valve mainly consists of a valve body, a valve ball located in the valve body, and a valve stem fixedly connected to the valve ball and rotatably installed in the valve body. By rotating the valve stem, the left and right sides of the fluid passage in the valve ball are respectively communicated with the input port and the output port to realize the flow of liquid. Usually, a left valve seat and a right valve seat are fixedly installed on the left and right sides of the valve ball respectively in the valve body. However, during the rotation of the valve ball, wear may occur, which may cause wear of the left valve seat and the right valve seat, and the liquid can flow through the worn part, affecting the use.

[0004] Chinese Patent No.: CN202220267128.4 discloses an elastic compensation valve seat structure for a ball valve. By utilizing the elasticity of the spring, the worn valve seat can be pushed towards the ball by the elastic force of the spring, so that the valve seat can closely adhere to the ball. However, if water or corrosive fluid flows in the valve body during use, the spring may rust. Since the liquid can directly contact the spring to cause rust, the rust marks on the spring will fall into the liquid and become impurities in the liquid. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a high-sealing ball valve which can move the left valve seat to the right and closely adhere to the ball by removing the left installation part and then sliding the position of the positioning block after wear occurs between the left valve seat and the ball.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: including a valve body, a valve stem, a valve ball fixedly connected to the valve stem, a left valve seat and a right valve seat. The valve ball is located in the valve body, the valve stem is rotatably installed in the valve body, the left valve seat and the right valve seat are both located in the valve body, the left valve seat abuts against the left side of the valve ball, and the right valve seat abuts against the right side of the valve ball. The valve body includes a left installation part on the left side of the valve body and a right installation part on the right side of the valve body. The left installation part and the right installation part are detachably connected. A positioning block is fixedly installed on the left side of the left valve seat. The positioning block is slidably installed in the valve body in the left-right direction. A matching groove for the positioning block to slide is arranged in the left installation part.

[0007] The present utility model is further configured as follows: The positioning block includes a positioning section and a matching section. The length direction of the positioning section extends vertically. The length direction of the matching section is perpendicular to the length direction of the positioning section. An installation insertion block protrudes upward from the positioning section. The valve body is provided with a plurality of installation slots corresponding to the installation insertion block. Each installation slot is arranged at intervals in the left-right direction on the left installation part. The installation insertion block is inserted into one of the installation slots and is detachably connected to the left installation part.

[0008] The present utility model is further configured as follows: A matching slot is recessed inward on the installation insertion block. A matching insertion block that matches the matching slot is arranged in each installation slot of the left installation part.

[0009] The present utility model is further configured as follows: The right installation part includes a first assembly section and a second assembly section. An upper positioning post for inserting above the left installation part and a lower positioning post for inserting below the left installation part are arranged on the first assembly section.

[0010] The present utility model is further configured as follows: It further includes a connecting bolt. The connecting bolt is inserted into the left installation part and is in threaded cooperation with the first assembly section.

[0011] The present utility model is further configured as follows: A spring is fixedly installed on the second assembly section. The right side of the spring is fixedly connected to the second assembly section, and the left side of the spring is fixedly connected to the right valve seat.

[0012] The present utility model is further configured as follows: It further includes an installation bolt. The installation bolt is inserted into the second assembly section and is in threaded cooperation with the first assembly section.

[0013] By adopting the above technical solution, since the left installation part and the right installation part are detachably connected, and the positioning block is slidably installed in the left-right direction on the left installation part. Therefore, after the left valve body is worn, by separating the left installation part and the right installation part, and moving the positioning block in the left installation part to the right. At this time, since the positioning block is fixed to the left valve seat, moving the positioning block to the right can drive the left valve seat to move to the right so that it is close to the left side of the valve ball and fits with it, so that the liquid in the fluid passage on the left side of the valve ball will not leak through the gap between the left valve seat and the valve ball. Since the right movement of the left valve seat depends on the movement of the positioning block rather than the elastic force of the spring, it is avoided that the liquid in the fluid passage flows to the surface of the spring and causes the spring to rust, and further avoids the rust marks from falling into the fluid passage. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0015] Figure 1 It is a sectional view of the specific embodiment of the present invention;

[0016] Figure 2 It is Figure 1 an enlarged view of A in

[0017] Figure 3 It is Figure 1 an enlarged view of B in

[0018] Figure 4 It is Figure 1 an enlarged view of C in

[0019] In the figure: 1 - valve body, 11 - left mounting part, 111 - mating groove, 112 - mounting slot, 1121 - mating plug, 12 - right mounting part, 121 - first assembly section, 122 - second assembly section, 1221 - upper positioning post, 1222 - lower positioning post, 1223 - spring, 1224 - baffle, 13 - fluid passage;

[0020] 2 - valve stem;

[0021] 3 - valve ball;

[0022] 4 - left valve seat;

[0023] 5 - right valve seat;

[0024] 6 - positioning block, 61 - positioning section, 611 - mounting plug, 6111 - mating slot, 62 - mating section;

[0025] 7 - connecting bolt;

[0026] 8 - mounting bolt. Specific Embodiment

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] As Figures 1-4As shown, the utility model discloses a high-sealing ball valve, comprising a valve body 1, a valve stem 2, a valve ball 3 fixedly connected to the valve stem 2, a left valve seat 4 and a right valve seat 5, wherein the valve ball 3 is located in the valve body 1, and the valve stem 2 is rotatably installed on the valve body 1, the left valve seat 4 and the right valve seat 5 are both located in the valve body 1, and the left valve seat 4 abuts against the left side of the valve ball 3, and the right valve seat 5 abuts against the right side of the valve ball 3. The ball valve is usually used to connect or cut off the flow between two pipelines, and is specifically manifested in that a fluid channel 13 extending left and right in the length direction is provided on the valve ball 3. When the two pipelines need to be connected, the valve stem 2 is rotated to drive the valve ball. The left side of the fluid channel 13 of the valve ball 3 is connected with the left pipeline, and the right side of the fluid channel 13 is connected with the right pipeline, so that the liquid in the left pipeline can flow to the fluid channel 13 and then to the right pipeline. When it is necessary to prevent the liquid in the left pipeline from flowing to the right pipeline, that is, to cut off the connection between the two, the valve stem 2 is rotated to make the fluid channel 13 in the valve ball 3 staggered with the left pipeline and the right pipeline so that the liquid in the left pipeline cannot enter the fluid channel 13 and then cannot enter the right pipeline. The valve body 1 includes a left mounting portion 11 located on the left side of the valve body 1 and a right mounting portion located on the right side of the valve body 1. 12, the left mounting part 11 and the right mounting part 12 are detachably connected by bolts or the like, a positioning block 6 is fixedly installed on the left side of the left valve seat 4 by welding or the like, the positioning block 6 is slidably installed on the left mounting part 11 along the left-right direction, and a matching groove 111 for the sliding movement of the positioning block 6 is provided in the left mounting part 11. Since the left mounting part 11 and the right mounting part 12 are detachably connected, and the positioning block 6 is slidably installed on the left mounting part 11 along the left-right direction, after the left valve body 1 is worn, the left mounting part 11 is separated from the right mounting part 12, and the positioning block 6 is located in the left mounting part 11. The block 6 moves to the right. At this time, since the positioning block 6 is fixed to the left valve seat 4, the left valve seat 4 can be driven to move to the right after the positioning block 6 moves to the right, even if it is close to the left side of the valve ball 3 and fits with it, so that the liquid in the fluid channel 13 on the left side of the valve ball 3 will not leak through the gap between the left valve seat 4 and the valve ball 3. Since the rightward movement of the left valve seat 4 depends on the movement of the positioning block 6 rather than the elastic force of the spring 1223, the liquid in the fluid channel 13 is prevented from flowing to the surface of the spring 1223 and causing the spring 1223 to rust, thereby preventing the rust mark from falling into the fluid channel 13.

[0029] Among them, the positioning block 6 includes a positioning section 61 and a mating section 62. The length direction of the positioning section 61 extends vertically. The length direction of the mating section 62 is perpendicular to the length direction of the positioning section 61. An installation insertion block 611 protrudes upward from the positioning section 61. The left installation part 11 is provided with a plurality of installation slots 112 corresponding to the installation insertion block 611. Each installation slot 112 is arranged at intervals in the left-right direction on the left installation part 11. The installation insertion block 611 is inserted into one of the installation slots 112 and is detachably connected to the left installation part 11 by means of buckles, magnetic attraction, etc. Since the installation insertion block 611 on the positioning section 61 is inserted into one of the installation slots 112 on the left installation part 11 and is detachably connected to the left installation part 11, when the left valve seat 4 is worn, at this time, the left installation part 11 and the right installation part 12 are separated, the left valve seat 4 is moved to the right to make it close to the valve ball 3. At this time, after the installation insertion block 611 of the positioning section 61 is inserted into the installation slot 112 directly above to complete the connection with the left installation part 11, the position of the positioning block 6 in the left installation part 11 is determined. Then, after the left installation part 11 and the right installation part 12 are connected, the close contact between the left valve seat 4 and the valve ball 3 is completed, and the liquid in the fluid passage 13 is prevented from leaking through the gap between the left valve seat 4 and the valve ball 3.

[0030] Among them, a mating slot 6111 is recessed inward on the installation insertion block 611. The left installation part 11 is provided with a mating insertion block 1121 that mates with the mating slot 6111 in each installation slot 112. Due to the existence of the mating slot 6111 on the installation insertion block 611, when the left installation part 11 and the right installation part 12 are separated and the position of the positioning block 6 can be adjusted, a downward force is applied to the positioning section 61, so that the part of the installation insertion block 611 above the mating slot 6111 is forced downward to cross the corresponding mating insertion block 1121, and then the positioning section 61 is separated from the left installation part 11. At this time, by inserting the installation insertion block 611 into the installation slot 112 in other positions, the position change of the positioning section 61 can be realized; when the installation insertion block 611 is inserted into other installation slots 112, the part of the installation insertion block 611 above the mating slot 6111 needs to be forced upward to cross the corresponding mating insertion block 1121 to realize the mating of the mating insertion block 1121 and the mating slot 6111, and then the installation insertion block 611 is stably located in the corresponding installation slot 112.

[0031] Among them, the right mounting portion 12 includes a first assembly section 121 and a second assembly section 122. On the first assembly section 121, there are provided an upper positioning post 1221 for inserting above the left mounting portion 11 and a lower positioning post 1222 for inserting below the left mounting portion 11. Since the upper positioning post 1221 and the lower positioning post 1222 on the first assembly section 121 will respectively insert above and below the left mounting portion 11 to determine the relative position between the left mounting portion 11 and the right mounting portion 12, it provides convenience for the fixed installation of the left mounting portion 11 and the right mounting portion 12.

[0032] Among them, there is also a connecting bolt 7. The connecting bolt 7 inserts through the left mounting portion 11 and is in threaded cooperation with the first assembly section 121. Since the connecting bolt 7 inserts through the left mounting portion 11 and is in threaded cooperation with the first assembly section 121, after the upper positioning post 1221 and the lower positioning post 1222 respectively insert above and below the left mounting portion 11 to determine the relative position between the left mounting portion 11 and the right mounting portion 12, at this time, it provides convenience for the insertion of the connecting bolt 7, so that the connecting bolt 7 can be inserted through the left mounting portion 11 more smoothly to achieve threaded cooperation with the first assembly section 121.

[0033] In addition, a spring 1223 is fixedly installed on the second assembly section 122 by means of bonding or the like. The right side of the spring 1223 is fixedly connected to the second assembly section 122 by means of bonding or the like. The left side of the spring 1223 is fixedly connected to the right valve seat 5. A baffle 1224 is integrally formed below the second assembly section 122 where the spring 1223 is located. The downward projection of the spring 1223 falls on the baffle 1224. Therefore, if the right valve seat 5 is worn and there is a gap with the valve ball 3, at this time, the elastic force of the spring 1223 can push the right valve body 1 to move leftward and closely adhere to the valve ball 3, so that the liquid in the fluid passage 13 cannot leak through the gap between the right valve seat 5 and the valve ball 3. And due to the presence of the baffle 1224 below the second assembly section 122, the liquid in the fluid passage 13 cannot directly contact the spring 1223, thus avoiding the situation where the rust marks of the spring 1223 fall into the fluid passage 13 after rusting.

[0034] Among them, there is also a mounting bolt 8. The mounting bolt 8 inserts through the second assembly section 122 and is in threaded cooperation with the first assembly section 121. Since the mounting bolt 8 inserts through the second assembly section 122 and is in threaded cooperation with the first assembly section, if the spring 1223 fails or the right valve seat 5 needs to be removed, by removing the mounting bolt 8 from the second assembly section 122 and the first assembly section, it is possible to access the right valve seat 5 and the spring 1223.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high sealing ball valve, comprising a valve body, a valve stem, a valve ball fixedly connected to the valve stem, a left valve seat and a right valve seat, wherein the valve ball is located in the valve body, the valve stem is rotatably mounted in the valve body, the left valve seat and the right valve seat are both located in the valve body, the left valve seat abuts against the left side of the valve ball, and the right valve seat abuts against the right side of the valve ball, and is characterized in that: The valve body includes a left mounting portion located on the left side of the valve body and a right mounting portion located on the right side of the valve body. The left mounting portion is detachably connected to the right mounting portion. A positioning block is fixedly installed on the left side of the left valve seat. The positioning block is slidably installed on the valve body along the left and right directions. A matching groove for the positioning block to slide is provided in the left mounting portion.

2. A high sealing ball valve according to claim 1, characterized in that: The positioning block includes a positioning section and a matching section. The length direction of the positioning section extends up and down, and the length direction of the matching section is perpendicular to the length direction of the positioning section. The positioning section is provided with a mounting plug protruding upward, and the valve body is provided with a plurality of mounting slots corresponding to the mounting plug. The mounting slots are arranged at intervals along the left-right direction on the left mounting part. The mounting plug is inserted into one of the mounting slots and is detachably connected to the left mounting part.

3. A high sealing ball valve according to claim 2, characterized in that: The installation plug block is recessed inwardly to form a matching slot, and each installation slot of the left installation portion is provided with a matching plug block that matches the matching slot.

4. A high sealing ball valve according to claim 1, characterized in that: The right mounting portion includes a first assembly section and a second assembly section, and the first assembly section is provided with an upper positioning column for inserting the upper part of the left mounting portion and a lower positioning column for inserting the lower part of the left mounting portion.

5. A high sealing ball valve according to claim 4, characterized in that: It also includes a connecting bolt, which is inserted into the left mounting portion and is threadably matched with the first assembly section.

6. A high sealing ball valve according to claim 4, characterized in that: A spring is fixedly mounted on the second assembly section, the right side of the spring is fixedly connected to the second assembly section, and the left side of the spring is fixedly connected to the right valve seat.

7. A high sealing ball valve according to claim 6, characterized in that: It also includes a mounting bolt, which is inserted into the second assembly section and threadably matched with the first assembly section.

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