Loose joint sealing PPR ball valve

Abstract

The utility model discloses a loose joint sealing PPR ball valve which comprises a valve body, the valve body is provided with a valve cavity, a spherical valve element is arranged in the valve cavity, a valve rod used for driving the spherical valve element to rotate is arranged at the top end of the spherical valve element, and each of the spherical valve element and the valve rod comprises an inner core body and an outer shell wrapping the outer end of the inner core body. The inner core body serves as an insert and is integrally formed with the outer shell. According to the utility model, the spherical valve core and the valve rod are designed to be the inner core body with the iron inside, then the outer end of the inner core body is coated with the outer shell made of copper, and the copper material is utilized to be in contact with a medium, so that the overall cost can be saved, the whole ball valve is not easy to rust and scale, and the long-time use requirement of the whole ball valve can be met while the cost is saved; in addition, the detachable filter screen is designed at the water inlet of the valve body, fluid passing through the valve body can be filtered, the cleanliness in the valve body can be guaranteed, and therefore the using effect of the ball valve is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, in particular to a live-joint sealed PPR ball valve. Background Art

[0002] The PPR loose-joint ball valve is a water service structural component with PPR material at both ends and a copper valve in the middle. It is widely used in pipeline repair and pipeline connection projects to achieve normal pipeline transportation of liquids.

[0003] The applicant found in actual use that the current valve stem and valve core are generally made of copper or iron materials. When made of copper material, the whole is not easy to rust and scale, but the overall cost of the all-copper ball valve is relatively high and it is not suitable for home pipes; when made of iron material, the overall cost is greatly reduced, but the whole is prone to rust and scaling. After long-term use, the rotation resistance is large and water leakage is prone to occur. How to make it cheap and not easy to rust and scale is a problem that needs to be solved at present. Utility Model Content

[0004] The purpose of the utility model is to provide a live-joint sealed PPR ball valve in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the utility model is as follows: a live-sealed PPR ball valve, comprising a valve body, the valve body having a valve cavity and a spherical valve core arranged in the valve cavity, a valve stem for driving the spherical valve core to rotate is provided at the top of the spherical valve core, the spherical valve core and the valve stem both comprise an inner core body and an outer shell body covering the outer end of the inner core, the inner core body being integrally formed with the outer shell body as an insert.

[0006] In a preferred embodiment, both ends of the valve body are provided with a flexible joint structure for connecting the pipeline, the flexible joint structure includes a PPR pipe and a locking sleeve, the outer peripheral surface of the PPR pipe protrudes to form a retaining ring, the locking sleeve is movably installed on the outer end of the PPR pipe, and the inner peripheral surface of the separated end of the locking sleeve protrudes to form a limiting ring.

[0007] In a preferred embodiment, O-rings are embedded at both ends of the valve body, the inner circumference of the locking sleeve is provided with an internal thread, and the outer circumferences on both sides of the valve body are provided with external threads that match the internal threads. When the locking sleeve is installed on the valve body, the retaining ring of the PPR pipe is tightly against the outer end surface of the O-ring.

[0008] In a preferred embodiment, the water inlet end of the valve body is recessed inward to form a groove, a filter screen is placed in the groove, and the PPR pipe at the water inlet end of the valve body is tightly against the end surface of the filter screen.

[0009] In a preferred embodiment, the inner core is made of iron material, and the outer shell is made of copper material.

[0010] In a preferred embodiment, the inner circumferential surface of the valve cavity of the valve body is provided with a sealing ring which fits with the outer end surface of the spherical valve core.

[0011] In a preferred embodiment, the upper end surface of the spherical valve core is recessed inward to form a slot, the bottom end of the valve stem protrudes to form a block that can be inserted into the slot, the upper end of the valve body is provided with a through hole for the valve stem to pass through, and the inner wall of the through hole is embedded with a Gley sealing ring that fits the valve stem.

[0012] In a preferred embodiment, a handle is sleeved on the upper end of the valve stem, a nut is threadedly mounted on the valve stem above the handle, and a limiting ring is protruded from the upper outer peripheral surface of the valve stem to limit the position of the valve stem.

[0013] In a preferred embodiment, a plastic shell is provided on the handle.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] 1. In the utility model, the spherical valve core and the valve stem are designed as an inner core body made of iron, and then the outer end of the inner core body is covered with a copper outer shell body. The copper material is used to contact the medium, which can save the overall cost and is not easy to rust and scale as a whole. Therefore, while saving costs, it can also meet the overall long-term use requirements of the ball valve.

[0016] 2. In the utility model, a detachable filter screen is designed at the water inlet of the valve body, which can filter the fluid passing through the valve body and ensure the cleanliness of the valve body;

[0017] 3. In the present invention, a Gley sealing ring is designed at the connection between the valve stem and the valve body, which is not easy to wear during use, and can reduce the probability of water leakage, thereby reducing the frequency and cost of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the utility model as a whole;

[0019] Figure 2 It is a structural cross-sectional view of the combination of the spherical valve core and the valve stem in the utility model.

[0020] Markings in the figure: 1-plastic shell, 2-handle, 3-valve stem, 31-outer shell, 32-inner core, 4-Glay sealing ring, 5-nut, 6-spherical valve core, 7-PPR pipe, 8-sealing ring, 9-valve body, 10-O-ring, 11-filter screen, 12-locking sleeve. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Reference Figure 1-2 A live-sealed PPR ball valve comprises a valve body 9, the valve body 9 has a valve cavity and a spherical valve core 6 is arranged in the valve cavity, a valve stem 3 for driving the spherical valve core 6 to rotate is arranged at the top of the spherical valve core 6, the spherical valve core 6 and the valve stem 3 both comprise an inner core 32 and an outer shell 31 coated on the outer end of the inner core 32, the inner core 32 is made of an iron material, and the outer shell 31 is made of a copper material, further, the inner core 32 is integrally formed with the outer shell 31 as an insert, the spherical valve core 6 and the valve stem 3 are designed as an inner core 32 with an iron interior, and then the outer shell 31 made of copper is coated on the outer end of the inner core 32, and the copper material is used to contact the medium, which can save the overall cost and is not easy to rust and scale as a whole, thereby saving the cost while meeting the overall long-term use requirements of the ball valve.

[0023] The surface of the outer shell 31 may also be additionally electroplated with nickel, so as to provide it with better electrochemical protection.

[0024] Furthermore, both ends of the valve body 9 are provided with a flexible joint structure for connecting the pipeline, the flexible joint structure includes a PPR pipe 7 and a locking sleeve 12, the outer peripheral surface of the PPR pipe 7 protrudes to form a retaining ring, the locking sleeve 12 is movably installed on the outer end of the PPR pipe 7, the inner peripheral surface of the locking sleeve 12 is provided with an internal thread, the outer peripheral surfaces of both sides of the valve body 9 are provided with external threads compatible with the internal threads, the inner peripheral surface of the locking sleeve 12 protrudes at the separated end to form a limiting ring, the limiting ring and the retaining ring can assist in limiting the installation position of the locking sleeve 12, when installing, the locking sleeve 12 is locked on the external thread on the valve body 9, the PPR pipe 7 can be fixed on the valve body 9 accordingly, thereby completing the assembly with the valve body 9, when disassembly, the locking sleeve 12 is unscrewed toward the end, at this time, the PPR pipe 7 can be separated from the valve body 9, thereby facilitating the disassembly operation of the ball valve itself.

[0025] Furthermore, O-rings 10 are embedded at both ends of the valve body 9. When the locking sleeve 12 is installed on the valve body 9, the retaining ring of the PPR pipe 7 is tightly against the outer end surface of the O-ring 10. The O-ring 10 can ensure the sealing of the connection between the valve body 9 and the PPR pipe 7, thereby preventing leakage of the liquid medium.

[0026] Furthermore, the water inlet end of the valve body 9 is recessed inward to form a groove, and a filter screen 11 is placed in the groove. The PPR pipe 7 at the water inlet end of the valve body 9 is tightly against the end face of the filter screen 11. A detachable filter screen 11 is designed at the water inlet of the valve body 9, which can filter the fluid passing through the valve body 9 and ensure the cleanliness of the valve body 9. When cleaning is required, the PPR pipe 7 at the water inlet end is disassembled accordingly, and then the filter screen 11 can be pulled out.

[0027] The filter screen 11 is made of stainless steel as a whole, and the mesh size of the filter screen 11 is 50-75 meshes.

[0028] Furthermore, a sealing ring 8 is provided on the inner circumference of the valve cavity of the valve body 9, which fits the outer end surface of the spherical valve core 6. The sealing ring 8 can improve the sealing performance of the connection between the spherical valve core 6 and the valve body 9, thereby preventing the medium from flowing out through the gap between the spherical valve core 6 and the valve body 9.

[0029] Furthermore, the upper end surface of the spherical valve core 6 is recessed inward to form a slot, the bottom end of the valve stem 3 is protruding to form a block that can be inserted into the slot, and the upper end of the valve body 9 is provided with a through hole for the valve stem 3 to pass through, and the inner wall of the through hole is embedded with a Gley sealing ring 4 that fits the valve stem 3. The Gley sealing ring 4 is used to replace the traditional rubber sealing ring for sealing, wherein the built-in rubber ring plays the role of elastic outward and tight sealing, and the anti-wear part of the outer end of the Gley ring is affected by the elastic force of the rubber ring and will fit with the valve body 9 part to ensure the sealing, and the anti-wear part of the Gley ring plays an anti-wear role, is not easy to wear during use, and reduces the frequency of maintenance.

[0030] Furthermore, a handle 2 is provided on the upper end of the valve stem 3, and a nut 5 is threadedly installed on the valve stem 3 above the handle 2. A limit ring is protruded from the upper outer peripheral surface of the valve stem 3 to limit the position of the valve stem 3. The handle 2 can be used to adjust the angles of the valve stem 3 and the spherical valve core 6 accordingly, thereby completing the corresponding opening / closing operation.

[0031] The handle 2 is covered with a plastic shell 1 , and the plastic shell 1 can improve the comfort of holding.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible sealing PPR ball valve, comprising a valve body, characterized in that: The valve body has a valve cavity and a spherical valve core is arranged in the valve cavity. The top of the spherical valve core is provided with a valve stem for driving it to rotate. The spherical valve core and the valve stem both include an inner core body and an outer shell body covering the outer end of the inner core body. The inner core body is integrally formed with the outer shell body as an insert. Both ends of the valve body are provided with a movable structure for connecting a pipeline. The movable structure includes a PPR pipe and a locking sleeve. The outer peripheral surface of the PPR pipe protrudes to form a retaining ring. The locking sleeve is movably installed on the outer end of the PPR pipe. The inner peripheral surface of the separated end of the locking sleeve protrudes to form a limiting ring.

2. A live-joint sealing PPR ball valve as claimed in claim 1, characterized in that: O-rings are embedded at both ends of the valve body, the inner circumference of the locking sleeve is provided with internal threads, and the outer circumferences on both sides of the valve body are provided with external threads that match the internal threads. When the locking sleeve is installed on the valve body, the retaining ring of the PPR pipe is tightly against the outer end surface of the O-ring.

3. A live-joint sealing PPR ball valve as claimed in claim 2, characterized in that: The water inlet end of the valve body is inwardly recessed to form a groove, a filter screen is placed in the groove, and the PPR pipe at the water inlet end of the valve body is tightly against the end surface of the filter screen.

4. A live-joint sealed PPR ball valve as claimed in claim 1, characterized in that: The inner core is made of iron material, and the outer shell is made of copper material.

5. A live-joint sealing PPR ball valve as claimed in claim 1, characterized in that: The inner peripheral surface of the valve cavity of the valve body is provided with a sealing ring which fits with the outer end surface of the spherical valve core.

6. A live-joint sealing PPR ball valve as claimed in claim 1, characterized in that: The upper end surface of the spherical valve core is recessed inward to form a slot, the bottom end of the valve stem is protruding to form a block that can be inserted into the slot, the upper end of the valve body is provided with a through hole for the valve stem to pass through, and the inner wall of the through hole is embedded with a Gley sealing ring that fits the valve stem.

7. A live-joint sealing PPR ball valve as claimed in claim 1, characterized in that: A handle is sleeved on the upper end of the valve stem, a nut is threadedly mounted on the valve stem above the handle, and a limiting ring is protruded on the upper outer peripheral surface of the valve stem to limit the position of the valve stem.

8. A live-joint sealing PPR ball valve as claimed in claim 7, characterized in that: The handle is sleeved with a plastic shell.

Images