PPR pipe fitting stop valve

Abstract

The utility model discloses a PPR pipe fitting stop valve which comprises a valve body, and the upper end of the valve body is fixedly connected with a valve cover. A supporting seat is arranged at the upper end of the valve cover, a sleeve is arranged in the valve cover, and a valve rod is movably mounted in an inner cavity of the sleeve; a valve element is arranged at the lower end of the valve rod, and a valve seat is arranged in an inner cavity of the valve body and matched with the valve element. A hand wheel disc is arranged at the upper end of the valve rod and connected with the valve rod in a screwed mode. According to the stop valve, the valve element and the valve rod can be conveniently separated and assembled, the maintenance efficiency is improved, and the good sealing performance and the good stop effect of the stop valve in long-term use are guaranteed; the V-shaped valve core with the wide upper part and the narrow lower part is adopted, so that the strength and the wear resistance of the valve core are enhanced, and the cutoff efficiency and the sealing performance of the valve are improved; the sealing rings arranged on the two sides of the valve element are tightly connected with the sealing valve ring in the inner cavity of the valve body in an abutting mode, a reliable sealing barrier is formed, and the sealing performance of the stop valve is further improved through the double-sealing design.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a PPR pipe stop valve. Background Art

[0002] The globe valve, also known as the cut-off valve, is one of the most widely used members of the valve family. Its working principle is based on the pressure applied by the valve stem, which causes the valve disc sealing surface to fit closely with the valve seat sealing surface, thereby effectively blocking the flow of the medium. The globe valve is so popular due to its many advantages, such as low friction resistance between the sealing surfaces during opening and closing, high durability, moderate opening height, simple manufacturing process, and convenient maintenance. These characteristics enable the globe valve to perform well not only in the medium and low pressure fields, but also in high-pressure environments. As a key member of the cut-off valve type, the plastic pipe globe valve's sealing mechanism is to apply torque to the valve stem, thereby applying pressure to the valve disc in the axial direction, ensuring that the valve disc sealing surface is in close contact with the valve seat sealing surface, thereby effectively preventing the medium from leaking through the gap in the sealing surface. This feature makes plastic pipe globe valves widely used in water pipeline systems.

[0003] However, in actual use, the valve core of a globe valve is often subjected to the intense impact of water flow for long periods of time, which can easily damage the valve core and reduce its sealing performance. Unfortunately, existing globe valve designs pose many inconveniences when replacing the valve core. Once the valve core is damaged, it is often difficult to replace it promptly and effectively. This not only reduces the fit between the disc and seat sealing surfaces, but also seriously affects the shutoff effect of the globe valve, posing a potential risk to the safe and stable operation of the entire water pipeline system. Summary of the Invention

[0004] The purpose of the utility model is to provide a PPR pipe stop valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a PPR pipe stop valve, comprising a valve body, wherein both sides of the valve body are fixedly connected with mounting plates, and the mounting plates are respectively connected to the pipe fittings; the upper end of the valve body is fixedly connected to a valve cover, wherein the lower end of the valve cover is fixedly connected to the valve body; the upper end of the valve cover is provided with a support seat, wherein the support seat and the valve cover are integrally arranged; a sleeve is provided in the valve cover, wherein a valve stem is movably installed in the inner cavity of the sleeve; the lower end of the valve stem downwardly penetrates the valve cover and extends into the valve body cavity; the lower end of the valve stem is provided with a valve core, wherein the valve core and the valve stem are detachably connected; the valve body cavity is provided with a valve seat, wherein the valve seat is adapted to the valve core; the upper end of the valve stem penetrates the support seat and extends upward, wherein a handwheel disk is provided at the top and bottom of the valve stem; a handwheel nut is installed in the center of the handwheel disk, wherein the handwheel nut is threadedly connected to the valve stem, so as to facilitate driving the valve stem up and down by rotating the handwheel disk.

[0006] Preferably, a receiving groove is provided at the upper end of the support seat, wherein a nut sleeve is provided in the receiving groove; the inner wall of the nut sleeve is fixedly connected to the handwheel nut, wherein the outer wall of the nut sleeve is movably connected to the receiving groove.

[0007] Preferably, a through hole is provided in the middle of the support seat, wherein a gland flange is provided in the through hole; the gland flange is arranged horizontally, wherein eye bolts are provided at both ends of the gland flange respectively.

[0008] Preferably, ear plates are symmetrically arranged on both sides below the through hole, wherein the ear plates are integrally arranged with the support seat; the lower end of the eye bolt is fixedly connected to the ear plate by a fixing bolt, wherein the upper end of the eye bolt is fixedly connected to the pressure cover flange.

[0009] Preferably, the valve core is cylindrical, wherein the cross section of the valve core is a "V"-shaped structure that is wide at the top and narrow at the bottom.

[0010] Preferably, sealing rings are respectively provided on both sides of the valve core, wherein a sealing valve ring is provided on the side of the valve seat close to the valve core, and the sealing valve ring abuts against the sealing ring.

[0011] Preferably, a connecting block is provided along the circumference of the valve core, wherein the connecting block and the valve core are integrally arranged; a limiting groove is symmetrically provided on the outer side of the connecting block, wherein a guide strip adapted to the limiting groove is provided on the inner wall of the inner cavity of the valve body close to the connecting block, and the guide strip is movably connected to the limiting groove.

[0012] Preferably, the lower end of the valve stem is fixedly connected to a "T"-shaped connector, wherein the upper end of the connecting block is provided with a slot adapted to the "T"-shaped connector.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes the convenient separation and assembly of the valve core and the valve stem through the detachable connection mode of the "T"-shaped connector and the card slot, which greatly simplifies the replacement process of the valve core and improves the maintenance efficiency; this design effectively solves the problem that the traditional stop valve core is difficult to replace after being damaged, and ensures the good sealing and stop effect of the stop valve in long-term use; the "V"-shaped structure valve core with a width at the top and a narrowness at the bottom not only enhances the strength and wear resistance of the valve core, but also helps to improve the shut-off efficiency and sealing performance of the valve; the sealing rings arranged on both sides of the valve core are in close contact with the sealing valve ring in the inner cavity of the valve body, forming a reliable sealing barrier. This double sealing design further improves The sealing performance of the stop valve reduces the risk of medium leakage; the limit groove on the connecting block cooperates with the guide strip on the inner wall of the valve body to provide stable guidance and limiting effect for the lifting and lowering movement of the valve core, ensuring the stability and accuracy of the valve core during the opening and closing process; the fixed connection between the nut sleeve and the handwheel nut set on the support seat, as well as the configuration of the pressure cover flange and the lifting eye bolt, not only enhances the stability of the valve cover structure, but also provides good support and adjustment space for the rotation of the handwheel and the lifting and lowering of the valve stem, making the operation of the valve more convenient and flexible; thereby effectively solving the problems existing in the traditional stop valve in valve core replacement, sealing performance, and ease of operation, and providing a strong guarantee for the safe and stable operation of the water pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model connected with the pipe fitting;

[0015] Figure 2 It is a left-side structural schematic diagram of the present utility model;

[0016] Figure 3 yes Figure 2 AA structure cross-sectional view shown;

[0017] Figure 4 This is a schematic structural diagram of the connection between the valve cover and the valve stem of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the connection between the valve stem and the valve core of the utility model;

[0019] Figure 6 This is a structural diagram of the valve cover of the utility model;

[0020] Figure 7 This is a structural diagram of the valve core of the utility model;

[0021] Figure 8 It is a structural diagram of the valve body of the utility model;

[0022] Figure 9It is a schematic diagram of the structure inside the valve body of the utility model.

[0023] Among them: 1. Valve body; 2. Mounting plate; 3. Pipe fitting; 4. Valve cover; 5. Support seat; 6. Sleeve; 7. Valve stem; 8. Valve core; 9. Handwheel plate; 10. Handwheel nut; 11. Accommodation groove; 12. Nut sleeve; 13. Valve seat; 14. Through hole; 15. Gland flange; 16. Eye bolt; 17. Ear plate; 18. Fixing bolt; 19. Sealing ring; 20. Sealing valve ring; 21. Connecting block; 22. Limiting groove; 23. Guide strip; 24. "T"-shaped connector; 25. Card slot. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings.

[0025] Please refer to Figures 1 to 9 To achieve the above objectives, the present invention provides the following technical solutions:

[0026] A PPR pipe stop valve comprises a valve body 1, wherein both sides of the valve body 1 are fixedly connected with mounting plates 2, and the mounting plates 2 are connected to the pipe fittings 3 respectively; the upper end of the valve body 1 is fixedly connected with a valve cover 4, wherein the lower end of the valve cover 4 is fixedly connected to the valve body 1; the upper end of the valve cover 4 is provided with a support seat 5, wherein the support seat 5 and the valve cover 4 are integrally arranged; a sleeve 6 is provided in the valve cover 4, wherein a valve stem 7 is movably installed in the inner cavity of the sleeve 6; the lower end of the valve stem 7 downwardly penetrates the valve cover 4 and extends into the inner cavity of the valve body 1; a valve core 8 is provided at the lower end of the valve stem 7, wherein the valve core 8 and the valve stem 7 are detachably connected; a valve seat 13 is provided in the inner cavity of the valve body 1, wherein the valve seat 13 is adapted to the valve core 8; the upper end of the valve stem 7 penetrates the support seat 5 and extends upward, wherein the top and bottom of the valve stem 7 are provided with a handwheel disk 9; a handwheel nut 10 is installed in the center of the handwheel disk 9, wherein the handwheel nut 10 is threadedly connected to the valve stem 7, so as to facilitate driving the valve stem 7 up and down by rotating the handwheel disk 9.

[0027] When no operation is performed, the stop valve is in a closed state, and the valve core 8 is tightly fitted on the valve seat 13 inside the valve body 1, preventing the medium from passing through. When opening the valve, the operator rotates the handwheel disc 9 counterclockwise, and the handwheel disc 9 drives the handwheel nut 10 to rotate on the valve stem 7, and drives the valve stem 7 to move upward. Since the handwheel nut 10 is screwed together with the valve stem 7, the rotation of the handwheel disc 9 is converted into a vertical upward movement of the valve stem 7; when the valve stem 7 rises, the valve core 8 is driven to rise together, gradually leaving the valve seat 13, forming a medium channel; as the valve core 8 rises, the medium begins to flow through the pipe fittings 3 connected to the mounting plates 2 on both sides of the valve body 1; when closing the valve, the operator rotates the handwheel clockwise, and the handwheel nut 10 rotates on the valve stem 7 and drives the valve stem 7 to move downward; the valve stem 7 descends, driving the valve core 8 to approach the valve seat 13 and finally fit tightly, closing the medium channel; at this time, the medium is completely blocked outside the valve body 1, achieving pipeline cutoff.

[0028] When the valve core 8 needs to be replaced, first close the valve and disconnect the connection on the mounting plate 2 connected to the pipe fitting 3; remove the handwheel plate 9, handwheel nut 10, etc. on the support seat 5 to expose the valve stem 7; loosen the detachable connection between the valve stem 7 and the valve core 8, remove the damaged valve core 8 from the valve stem 7, and then align the new valve core 8 with the connection structure at the lower end of the valve stem 7 to ensure correct installation, and retighten the connection between the valve stem 7 and the valve core 8 to ensure firmness and reliability; then restore the relevant components on the support seat 5 in turn, such as the handwheel, handwheel nut 10, etc., reconnect the mounting plate 2 and the pipe fitting 3, ensure that the stop valve is in the correct position in the pipeline, open the valve, and check the sealing performance and opening / closing flexibility of the new valve core 8.

[0029] Please refer to Figure 3 、 Figure 4 and Figure 6 As an embodiment of the present invention, a receiving groove 11 is provided at the upper end of the support seat 5, wherein a nut sleeve 12 is provided in the receiving groove 11; the inner wall of the nut sleeve 12 is fixedly connected to the handwheel nut 10, wherein the outer wall of the nut sleeve 12 is movably connected to the receiving groove 11.

[0030] In the above-mentioned scheme, a receiving groove 11 is designed and processed at the upper end of the support seat 5, wherein the shape and size of the receiving groove 11 match the nut sleeve 12, which is used to accommodate and fix the nut sleeve 12; the nut sleeve 12 is a tubular structure with an internal thread, and its inner wall is designed with an internal thread that matches the handwheel nut 10; during assembly, the nut sleeve 12 is accurately placed in the receiving groove 11, maintaining the movable connection between its outer wall and the receiving groove 11 for subsequent operations; the handwheel nut 10 is installed at the top of the valve stem 7, and is screwed together with the external thread on the valve stem 7 through its internal thread ; Then, the handwheel is installed on the handwheel nut 10, usually fixed by fasteners or snaps; the lower end of the handwheel nut 10 will extend into the nut sleeve 12 and fit tightly with the inner wall of the nut sleeve 12; like this, when the handwheel is rotated, the handwheel nut 10 will drive the nut sleeve 12 to rotate in the accommodating groove 11; the design of the accommodating groove 11 at the upper end of the support seat 5 and the nut sleeve 12 inside it provides stable and flexible support and guiding for the installation and operation of the handwheel nut 10. This design not only ensures the normal operation of the stop valve, but also improves its operational convenience and service life.

[0031] Please refer to Figures 2 to 6As an embodiment of the present invention, a through hole 14 is opened in the middle of the support base 5, wherein a gland flange 15 is provided in the through hole 14; the gland flange 15 is arranged horizontally, wherein both ends of the gland flange 15 are respectively provided with lifting eye bolts 16; ear plates 17 are symmetrically arranged on both sides below the through hole 14, wherein the ear plates 17 are integrally arranged with the support base 5; the lower end of the lifting eye bolt 16 is fixedly connected to the ear plate 17 by a fixing bolt 18, wherein the upper end of the lifting eye bolt 16 is fixedly connected to the gland flange 15.

[0032] In the above scheme, the support seat 5 is an important component of the stop valve, wherein the support seat 5 is integrally arranged with the valve cover 4 to support and fix the valve stem 7 and the valve core 8; a through hole 14 is horizontally opened at the center position of the support seat 5, wherein the design of the through hole 14 allows the valve stem 7 to pass through and realizes the up and down movement control of the valve core 8; the through hole 14 not only provides the necessary channel for the valve stem 7, but also ensures the free movement of the valve stem 7 in the vertical direction; at the same time, the design of the through hole 14 also takes into account the stability and safety of the valve stem 7 and the valve core 8 to prevent them from deflecting or falling off during operation; the gland flange 15 is a horizontally arranged component, wherein the gland flange 15 is installed in the through hole 14 and is movably connected to the valve stem 7; the design of the gland flange 15 It is designed to provide additional support and fixation for the valve stem 7 to prevent it from shaking or loosening during operation; the eye bolt 16 is a key component connecting the gland flange 15 and the ear plate 17; the upper end of the eye bolt 16 is fixedly connected to the gland flange 15, usually by welding, fasteners, etc., and this connection ensures the stability and reliability of the gland flange 15 during operation; the ear plate 17 is a component integrally arranged with the support seat 5, wherein the ear plates 17 are located on both sides below the through hole 14 and are symmetrically distributed; the ear plate 17 is designed to provide a fixed support point for the eye bolt 16; the lower end of the eye bolt 16 is tightly connected to the ear plate 17 by a fixing bolt 18, and this connection method ensures the stability and safety of the eye bolt 16 during operation.

[0033] Please refer to Figure 3 、 Figure 4 、 Figure 7 and Figure 9 As an embodiment of the present utility model, the valve core 8 is cylindrical, wherein the cross-section of the valve core 8 is a "V"-shaped structure that is wide at the top and narrow at the bottom; sealing rings 19 are respectively provided on both sides of the valve core 8, wherein a sealing valve ring 20 is provided on the side of the valve seat 13 close to the valve core 8, and the sealing valve ring 20 abuts against the sealing ring 19.

[0034] In the above-mentioned scheme, the valve core 8 is designed to be cylindrical, which is to match the cylindrical channel in the valve body 1 to ensure that the medium can pass through or be cut off smoothly; more specifically, the cross-section of the valve core 8 adopts a "V"-shaped structure that is wide at the top and narrow at the bottom. This design not only enhances the mechanical strength of the valve core 8, but also enables the valve core 8 to better fit with the valve seat 13 in the closed state to form a tight seal; when the valve core 8 is closed, its "V"-shaped cross-section that is wide at the top and narrow at the bottom will fit tightly with the sealing surface of the valve seat 13. This fit not only ensures the sealing of the valve, but also makes it more difficult for the medium to pass through the tiny gap between the sealing surfaces when under pressure; the valve core 8 is connected to the handwheel 9 through the valve stem 7. When the handwheel 9 is rotated, the valve stem 7 drives the valve core 8 to move up and down. This moving mechanism allows the operator to conveniently control the opening and closing of the valve by rotating the handwheel 9.

[0035] Sealing rings 19 are provided on both sides of the valve core 8. These sealing rings 19 are typically made of an elastic material, such as rubber or polytetrafluoroethylene, which has good elasticity and wear resistance. The main function of the sealing rings 19 is to fill the small gap between the valve core 8 and the valve seat 13 when the valve core 8 is in contact with the valve seat 13, preventing medium leakage. A sealing valve ring 20 is provided on the side of the valve seat 13 close to the valve core 8. The sealing valve ring 20 is also made of an elastic material, and its shape and size match the side of the valve core 8. When the valve core 8 is closed, the sealing valve ring 20 will tightly abut the sealing ring 19, forming a reliable sealing barrier. This double sealing design further improves the sealing performance of the valve. The elastic materials used in the sealing rings 19 and the sealing valve ring 20 have certain compressibility and resilience. When the medium pressure increases, the sealing material will be compressed, further filling the gap between the sealing surfaces. When the medium pressure decreases, the sealing material will rebound, maintaining a tight fit between the sealing surfaces. This design not only improves the operating efficiency and safety of the valve, but also reduces maintenance costs and operational difficulty.

[0036] Please refer to the figure Figures 7 to 9 As an embodiment of the present invention, a connecting block 21 is provided along the circumference of the valve core 8, wherein the connecting block 21 is integrally provided with the valve core 8; a limiting groove 22 is symmetrically provided on the outer side of the connecting block 21, wherein a guide strip 23 adapted to the limiting groove 22 is provided on the inner wall of the inner cavity of the valve body 1 close to the connecting block 21, and the guide strip 23 is movably connected to the limiting groove 22.

[0037] In the above-mentioned scheme, the connecting block 21 is a protruding part arranged along the circumference of the valve core 8, wherein the connecting block 21 and the valve core 8 are arranged in one piece, which means that the connecting block 21 and the valve core 8 are processed as a whole during the manufacturing process; this integrated design ensures a firm connection between the connecting block 21 and the valve core 8, and prevents valve failure caused by loosening or falling off during use; the connecting block 21 not only enhances the structural strength of the valve core 8, but also provides it with a connection point that cooperates with the guide strip 23 in the inner cavity of the valve body 1; through the connecting block 21, the valve core 8 can move more stably in the inner cavity of the valve body 1 while maintaining its correct position and direction; the outer side of the connecting block 21 is symmetrically provided with a limiting groove 22, wherein the shape and size of the limiting groove 22 are adapted to the guide strip 23 in the inner cavity of the valve body 1, ensuring a close fit between them; the design of the limiting groove 22 makes the valve core 8 move During the movement, it can be guided and restricted by the guide strip 23, thereby avoiding the valve core 8 from shaking or deflecting; the guide strip 23 is a protruding part arranged on the inner wall of the inner cavity of the valve body 1 near the connecting block 21, wherein the guide strip 23 cooperates with the limiting groove 22 to jointly constitute a track for the movement of the valve core 8; when the valve core 8 moves up and down in the inner cavity of the valve body 1, the limiting groove 22 on the connecting block 21 will slide along the track of the guide strip 23; this sliding mechanism not only ensures that the valve core 8 can move smoothly, but also enables the valve core 8 to be accurately positioned at the required position during the closing or opening process; through the cooperation of the connecting block 21, the limiting groove 22 and the guide strip 23, the valve core 8 can maintain higher stability during the movement; this stability not only reduces the shaking and deflection of the valve core 8 during the movement, but also improves the sealing performance and service life of the valve, and greatly reduces the operation difficulty and maintenance cost.

[0038] Please refer to Figure 4 、 Figure 5 and Figure 7 As an embodiment of the present invention, the lower end of the valve stem 7 is fixedly connected to a "T"-shaped connector 24, wherein the upper end of the connecting block 21 is provided with a slot 25 adapted to the "T"-shaped connector 24.

[0039] In the above scheme, a "T"-shaped connector 24 is fixedly connected to the lower end of the valve stem 7, and a slot 25 adapted to the "T"-shaped connector 24 is opened at the upper end of the connecting block 21; the shape and size of the slot 25 completely match the "T"-shaped connector 24, wherein the shape and size of the "T"-shaped connector 24 are customized according to the shape and size of the slot 25 on the connecting block 21 to ensure accurate fit between them; the design of the slot 25 not only takes into account the fit with the "T"-shaped connector 24, but also takes into account the pressure and friction generated by the valve core 8 on the slot 25 during movement, so as to ensure the durability and reliability of the slot 25; when the valve core 8 is installed on the valve stem 7, the " The "T"-shaped connector 24 will be inserted into the slot 25 on the connecting block 21. Since the shape and size of the "T"-shaped connector 24 and the slot 25 are completely matched, the "T"-shaped connector 24 will be tightly engaged in the slot 25 to form a stable connection. This connection mechanism not only ensures a firm connection between the valve stem 7 and the valve core 8, but also enables the valve stem 7 to stably transmit the rotational force to the valve core 8, thereby controlling the opening and closing of the valve. Through the cooperation between the "T"-shaped connector 24 and the slot 25, the connection between the valve stem 7 and the valve core 8 becomes more stable. This stability not only reduces the risk of valve failure due to loose connection, but also improves the sealing performance and service life of the valve.

[0040] The matching design of the "T"-shaped connector 24 and the slot 25 makes the installation of the valve stem 7 simpler and faster. The operator only needs to insert the "T"-shaped connector 24 at the lower end of the valve stem 7 into the slot 25 on the connecting block 21 to complete the installation of the valve stem 7. This design not only saves installation time, but also reduces the installation difficulty and cost. When the valve needs to be maintained or parts need to be replaced, the matching design of the "T"-shaped connector 24 and the slot 25 also provides convenience. The operator can easily disassemble the valve stem 7 to inspect, clean or replace damaged parts inside the valve, which not only improves maintenance efficiency but also reduces maintenance costs.

[0041] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A PPR pipe stop valve, comprising a valve body (1), wherein mounting plates (2) are fixedly connected to both sides of the valve body (1), and the mounting plates (2) are respectively connected to pipe fittings (3); characterized in that, The upper end of the valve body (1) is fixedly connected to a valve cover (4), wherein the lower end of the valve cover (4) is fixedly connected to the valve body (1); the upper end of the valve cover (4) is provided with a support seat (5), wherein the support seat (5) and the valve cover (4) are integrally arranged; a sleeve (6) is provided in the valve cover (4), wherein a valve stem (7) is movably mounted in the inner cavity of the sleeve (6); the lower end of the valve stem (7) downwardly penetrates the valve cover (4) and extends into the inner cavity of the valve body (1); the lower end of the valve stem (7) is provided with a valve core (8), which The middle valve core (8) and the valve stem (7) are detachably connected; a valve seat (13) is provided in the inner cavity of the valve body (1), wherein the valve seat (13) is adapted to the valve core (8); the upper end of the valve stem (7) passes through the support seat (5) and extends upward, wherein a handwheel disc (9) is provided at the top and bottom of the valve stem (7); a handwheel nut (10) is installed at the center of the handwheel disc (9), wherein the handwheel nut (10) is screwedly connected to the valve stem (7), so that the valve stem (7) can be driven up and down by rotating the handwheel disc (9).

2. A PPR pipe stop valve according to claim 1, characterized in that: The upper end of the support seat (5) is provided with a receiving groove (11), wherein a nut sleeve (12) is provided in the receiving groove (11); the inner wall of the nut sleeve (12) is fixedly connected to the handwheel nut (10), wherein the outer wall of the nut sleeve (12) is movably connected to the receiving groove (11).

3. A PPR pipe stop valve according to claim 1, characterized in that: A through hole (14) is provided in the middle of the support seat (5), wherein a gland flange (15) is provided in the through hole (14); the gland flange (15) is arranged horizontally, wherein eye bolts (16) are provided at both ends of the gland flange (15).

4. A PPR pipe stop valve according to claim 3, characterized in that: Ear plates (17) are symmetrically arranged on both sides below the through hole (14), wherein the ear plates (17) are integrally arranged with the support seat (5); the lower end of the eye bolt (16) is fixedly connected to the ear plate (17) through a fixing bolt (18), wherein the upper end of the eye bolt (16) is fixedly connected to the pressure cover flange (15).

5. A PPR pipe stop valve according to claim 1, characterized in that: The valve core (8) is cylindrical, wherein the cross section of the valve core (8) is a "V"-shaped structure that is wide at the top and narrow at the bottom.

6. A PPR pipe stop valve according to claim 1, characterized in that: Sealing rings (19) are respectively provided on both sides of the valve core (8), wherein a sealing valve ring (20) is provided on the side of the valve seat (13) close to the valve core (8), and the sealing valve ring (20) abuts against the sealing ring (19).

7. A PPR pipe stop valve according to claim 1, characterized in that: A connecting block (21) is provided along the circumference of the valve core (8), wherein the connecting block (21) and the valve core (8) are integrally arranged; a limiting groove (22) is symmetrically provided on the outer side of the connecting block (21), wherein a guide strip (23) adapted to the limiting groove (22) is provided on the inner wall of the inner cavity of the valve body (1) close to the connecting block (21), and the guide strip (23) is movably connected to the limiting groove (22).

8. A PPR pipe stop valve according to claim 1, characterized in that: The lower end of the valve stem (7) is fixedly connected to a "T"-shaped connector (24), wherein the upper end of the connecting block (21) is provided with a slot (25) adapted to the "T"-shaped connector (24).

Images