Frost valve with randomly adjustable length

Abstract

The utility model discloses a frost valve with randomly adjustable length, which comprises an upper valve body and a lower valve body, the upper valve body is in threaded connection with a valve rod, an inner pipe and an outer pipe are connected between the upper valve body and the lower valve body, the inner pipe and the outer pipe are hard plastic pipes, the outer pipe is coaxially sleeved outside the inner pipe, an overflowing channel is formed between the inner pipe and the outer pipe, and the overflowing channel is communicated with the valve rod. A plunger is slidably arranged in the lower valve body, the bottom of the inner pipe is fixedly inserted into the top of the plunger, and the top of the inner pipe is fixedly connected with the top of the valve rod through a locking structure. The upper valve body comprises a connecting seat, the connecting seat extends downwards to form an inserting barrel corresponding to the outer pipe, the bottom of the outer pipe is matched with the water outlet end of the lower valve body in an inserting mode, the top of the outer pipe is arranged outside the inserting barrel in a sleeving mode, the locking sleeve comprises an annular pressing part and an annular locking part which are integrally arranged, and the connecting seat is provided with an annular avoiding groove corresponding to the annular locking part; and the annular locking part is in threaded connection with the inner wall of the annular avoiding groove. The length of the inner pipe and the length of the outer pipe can be adjusted, disassembly and assembly are convenient, and locking is firm.

Description

Technical Field

[0001] This utility model relates to the field of antifreeze valve technology, and in particular to an antifreeze valve with an adjustable length. Background Technology

[0002] In northern China, where winter temperatures can drop to minus 30 or 40 degrees Celsius, water in valves can easily freeze, causing faucets to stop working. Therefore, antifreeze valves are commonly used to prevent water from freezing. These valves are insulated by burying the valve body pipe underground. However, existing antifreeze valves typically use metal pipes, which are difficult to cut, making it impossible to adjust the length of the pipe buried underground. This issue urgently needs improvement. Utility Model Content

[0003] The purpose of this utility model is to provide an antifreeze valve with adjustable length, featuring adjustable inner and outer tube lengths, easy disassembly and assembly of the inner and outer tubes, and secure locking.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an antifreeze valve with arbitrarily adjustable length, comprising an upper valve body and a lower valve body, wherein the lower valve body has an inlet valve chamber, the upper valve body has an outlet valve chamber, a valve stem is threadedly connected to the upper valve body, an inner tube and an outer tube are connected between the upper valve body and the lower valve body, the inner tube and the outer tube are made of rigid plastic tubes, the outer tube is coaxially sleeved outside the inner tube, a flow passage is formed between the inner tube and the outer tube, and the inlet valve chamber is connected to the outlet valve chamber through the flow passage;

[0005] A plunger is slidably disposed within the inlet valve cavity. The bottom of the inner tube is inserted and fixedly connected to the top of the plunger. The top of the inner tube is fixedly connected to the top of the valve stem via a locking structure. The upper valve body includes a connecting seat, and a plug-in cylinder extends downward from the connecting seat corresponding to the outer tube. The inner cavity of the plug-in cylinder communicates with the outlet valve cavity. The bottom of the outer tube is inserted and fitted into the outlet end of the lower valve body. The top of the outer tube is sleeved over the plug-in cylinder. The valve body also includes a locking sleeve. The locking sleeve includes an integrally formed annular pressing part and an annular locking part. The connecting seat has an annular clearance groove corresponding to the annular locking part. The annular locking part is threadedly connected to the inner wall of the annular clearance groove. When the annular locking part is threadedly connected to the connecting seat, the annular pressing part locks and fixes the upper end of the outer tube to the plug-in cylinder.

[0006] By adopting the above technical solution, when the operator needs to adjust the length of the pipe body extending underground, the bottom of the inner and outer pipes made of plastic can be cut using a cutting tool to obtain the inner and outer pipes of the predetermined length. Then, the top of the inner pipe is fixedly connected to the bottom of the valve stem through a locking structure. After that, the outer pipe is sleeved on the outside of the inner pipe, so that the top of the outer pipe is inserted and fixed to the plug-in cylinder of the upper valve body. Then, the annular locking part of the locking sleeve is threaded into the relief groove of the connecting seat. By continuously tightening the annular locking part, the annular pressing part locks and fixes the upper end of the outer pipe to the outside of the locking sleeve. Then, the inner pipe and the plunger can be moved up and down synchronously by turning the valve stem to realize the opening or closing of the water inlet valve chamber and the flow passage. It has the effects of adjustable length of inner and outer pipes, convenient disassembly and assembly of inner and outer pipes, and firm locking.

[0007] A further feature of this invention is that the locking structure includes an internally threaded sleeve with internal threads, the internally threaded sleeve being integrally disposed at the bottom of the valve stem, and the outer wall of the upper end of the inner tube having external threads corresponding to the internal threads, the inner tube being threadedly connected to the internal threads of the internally threaded sleeve through the external threads.

[0008] By adopting the above technical solution, the inner tube is screwed so that the external thread and the internal thread of the inner thread sleeve are tightened, thereby achieving a fixed connection of the inner tube at the bottom of the valve stem. The connection method is convenient and firm.

[0009] A further feature of this invention is that the bottom of the valve stem extends into the inner cavity of the internal threaded sleeve, and a damping sleeve is fixedly fitted on the outer wall of the bottom of the valve stem, with the inner wall of the inner tube and the outer wall of the damping sleeve in frictional engagement.

[0010] By adopting the above technical solution, when the inner tube is installed on the bottom of the valve stem, the damping sleeve can use its own friction to improve the positioning and anti-rotation effect of the inner tube.

[0011] A further feature of this invention is that the outer wall of the plug tube is coated with an anti-slip coating.

[0012] By adopting the above technical solution, the addition of an anti-slip coating can further improve the anti-slip and anti-rotation performance of the outer tube when inserted into the connector.

[0013] A further feature of this invention is that the outer wall of the annular pressing part is provided with anti-slip ridges, and the outer diameter of the annular locking part is larger than the outer diameter of the annular pressing part.

[0014] By adopting the above technical solution, the addition of the anti-slip protrusion makes it less likely for the operator to slip when tightening the locking sleeve. The outer diameter of the annular locking part is set to be larger than that of the annular pressing part, mainly to increase the effective area of ​​the threaded connection between the annular locking part and the inner wall of the annular clearance groove, thereby improving the connection stability between the annular locking part and the connecting seat.

[0015] A further feature of this invention is that the inner diameter of the annular pressing part gradually decreases from the side closer to the annular locking part toward the side farther away from the annular locking part.

[0016] By adopting the above technical solution, as the locking sleeve gradually tightens at the bottom of the connector, the annular locking part can gradually increase the compressive stress on the inner tube until the locking sleeve completely locks the inner tube outside the plug-in sleeve.

[0017] A further feature of this invention is that an expansion ring is fitted at the bottom of the outer tube, and the expansion ring is used to lock and fix the bottom of the outer tube to the water outlet end of the lower valve body.

[0018] By adopting the above technical solution, the bottom of the outer pipe can be firmly locked to the water outlet end of the lower valve body using an expansion ring.

[0019] A further feature of this invention is that a check valve is provided in the lower valve body, the check valve is located on the plunger, and the check valve allows the liquid in the inlet valve chamber to flow unidirectionally from the inlet end of the lower valve body to the outlet end.

[0020] By adopting the above technical solution, the check valve can prevent water in the upper valve body from flowing back into the lower valve body through the flow passage.

[0021] A further feature of this invention is that the water inlet valve cavity includes a water inlet channel and a water passage, the inner diameter of the water inlet channel is smaller than the inner diameter of the water passage, and a sealing ring is fixedly provided on the outer wall of the bottom of the plunger, and the plunger is sealed to the water inlet channel through the sealing ring.

[0022] By adopting the above technical solution, when the plunger drives the sealing ring to extend into the water inlet channel, the water inlet valve chamber is in a blocked state. When the plunger drives the sealing ring to be in the water passage, there is a gap between the sealing ring and the water passage, so that the water inlet valve chamber is in a conductive state.

[0023] A further feature of this invention is that the lower valve body has a first stop portion on its outer wall. When the outer tube is inserted into the water outlet of the lower valve body, the bottom of the outer tube engages with the first stop portion. The plunger sidewall has a second stop portion. When the inner tube is inserted into the top of the plunger, the bottom of the inner tube engages with the second stop portion.

[0024] By adopting the above technical solution and utilizing the stopping and positioning functions of the first and second stop parts, the installation accuracy of the outer and inner pipes on the lower valve body can be improved.

[0025] In summary, this utility model has the following beneficial effects:

[0026] The device employs an inner and outer pipe connected between an upper and lower valve body. Both the inner and outer pipes are made of rigid plastic, with the outer pipe coaxially sleeved over the inner pipe, forming a flow channel. The bottom of the inner pipe is inserted and fixed to the top of a plunger in the lower valve body, and the top of the inner pipe is fixedly connected to the top of the valve stem via a locking structure. The bottom of the connecting seat in the upper valve body has a plug-in sleeve, with the top of the outer pipe sleeved over the plug-in sleeve. The bottom of the outer pipe is inserted and fitted into the outlet end of the lower valve body. It also includes a locking sleeve, which comprises an integrally formed annular pressing part and an annular locking part. When the operator needs to adjust the length of the pipe extending underground, a cutting tool can be used to cut the plastic material. The bottom of the inner and outer tubes are cut to obtain inner and outer tubes of predetermined length. Then, the top of the inner tube is fixedly connected to the bottom of the valve stem through a locking structure. After that, the outer tube is sleeved over the inner tube, and the top of the outer tube is inserted and fixed to the plug-in sleeve of the upper valve body. Then, the annular locking part of the locking sleeve is threaded into the relief groove of the connecting seat. By continuously tightening the annular locking part, the annular pressing part locks and fixes the upper end of the outer tube to the outside of the locking sleeve. Then, the inner tube and the plunger can be moved up and down synchronously by turning the valve stem to realize the opening or closing of the water inlet valve chamber and the flow passage. It has the effects of adjustable length of inner and outer tubes, convenient disassembly and assembly, and firm locking. Attached Figure Description

[0027] Figure 1 This is a side view of the present invention.

[0028] Figure 2 This is a utility model Figure 1 A sectional view of section AA in the middle.

[0029] Figure 3 This is a utility model Figure 2 A magnified view of a portion of region B in the middle.

[0030] Figure 4 This is a utility model Figure 2 A magnified view of a portion of region C.

[0031] Figure 5 This is a utility model Figure 2 A magnified view of a portion of region D.

[0032] Figure 6 This is a cross-sectional view of the slider position in another embodiment of the present invention.

[0033] In the diagram: 1. Upper valve body; 11. Valve stem; 111. Internal threaded sleeve; 1111. Internal thread; 112. Damping sleeve; 113. Tightening part; 12. Outlet valve chamber; 13. Connecting seat; 131. Annular clearance groove; 14. Insert sleeve; 141. Anti-slip coating; 15. Locking sleeve; 151. Annular pressing part; 1511. Anti-slip ridge; 152. Annular locking part; 2. Lower valve body; 21. Inlet valve chamber; 211. Inlet channel; 212. Water passage; 22. Plunger; 221. Sealing ring; 222. Second stop part; 23. Check valve; 24. First stop part; 3. Inner tube; 31. External thread; 4. Outer tube; 41. Expansion ring; 42. Slider; 5. Flow passage. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] An antifreeze valve with an adjustable length, such as Figures 1-5 As shown, the device includes an upper valve body 1 and a lower valve body 2. The lower valve body 2 has an inlet valve chamber 21, and the upper valve body 1 has an outlet valve chamber 12. A valve stem 11 is threadedly connected to the upper valve body 1, and a screwing part 113 is fixedly provided at the upper end of the valve stem 11. An inner tube 3 and an outer tube 4 are connected between the upper valve body 1 and the lower valve body 2. The inner tube 3 and the outer tube 4 are made of rigid plastic tubes, and the outer tube 4 is coaxially sleeved outside the inner tube 3. A flow passage 5 is formed between the inner tube 3 and the outer tube 4. The inlet valve chamber 21 communicates with the outlet valve chamber 12 through the flow passage 5. A plunger 22 is slidably provided in the inlet valve chamber 21. The bottom of the inner tube 3 is inserted and fixed to the top of the plunger 22, and the top of the inner tube 3 is fixedly connected to the top of the valve stem 11 through a locking structure. The upper valve body 1 The device includes a connecting seat 13, with a plug-in sleeve 14 extending downward from the connecting seat 13 corresponding to the outer tube 4. The inner cavity of the plug-in sleeve 14 is connected to the outlet valve cavity 12. The bottom of the outer tube 4 is plugged into the outlet end of the lower valve body 2, and the top of the outer tube 4 is sleeved on the plug-in sleeve 14. The device also includes a locking sleeve 15, which includes an integrally formed annular pressing part 151 and annular locking part 152. The connecting seat 13 has an annular relief groove 131 corresponding to the annular locking part 152. The annular locking part 152 is threadedly connected to the inner wall of the annular relief groove 131. When the annular locking part 152 is threadedly connected to the connecting seat 13, the annular pressing part 151 locks and fixes the upper end of the outer tube 4 to the plug-in sleeve 14.

[0036] like Figures 2-5As shown, the locking structure includes an internally threaded sleeve 111 with internal threads 1111. The internally threaded sleeve 111 is integrally formed on the bottom of the valve stem 11. The outer wall of the upper end of the inner tube 3 is provided with external threads 31 corresponding to the internal threads 1111. The inner tube 3 is threadedly connected to the internal threads 1111 of the internally threaded sleeve 111 through the external threads 31. Tightening the inner tube 3 tightens the external threads 31 and the internal threads 1111 of the internally threaded sleeve 111, thereby fixing the inner tube 3 at the bottom of the valve stem 11. The connection is convenient and secure; the bottom of the valve stem 11 extends into the inner cavity of the internal threaded sleeve 111, and a damping sleeve 112 is fixedly fitted on the outer wall of the bottom of the valve stem 11. The inner wall of the inner tube 3 and the outer wall of the damping sleeve 112 are in frictional engagement. When the inner tube 3 is installed on the bottom of the valve stem 11, the damping sleeve 112 can use its own friction to improve the positioning and anti-rotation effect of the inner tube 3; the outer wall of the plug-in sleeve 14 is coated with an anti-slip coating 141. The addition of the anti-slip coating 141 can... To further improve the anti-slip and anti-rotation performance of the outer tube 4 when inserted into the connector sleeve 14, the outer wall of the annular pressing part 151 is provided with anti-slip ridges 1511, and the outer diameter of the annular locking part 152 is larger than that of the annular pressing part 151. The addition of the anti-slip ridges makes it less likely for the operator to slip when turning the locking sleeve 15. The outer diameter of the annular locking part 152 is set to be larger than that of the annular pressing part 151, mainly to increase the effective area of ​​the threaded connection between the annular locking part 152 and the inner wall of the annular relief groove 131, thereby improving the connection stability between the annular locking part 152 and the connecting seat 13. The inner diameter of the annular pressing part 151 gradually decreases from the side closer to the annular locking part 152 to the side farther away from the annular locking part 152, so that as the locking sleeve 15 is gradually locked to the bottom of the connecting seat 13, the compressive stress of the annular locking part 152 on the inner tube 3 gradually increases until the locking sleeve 15 completely locks the inner tube 3 outside the connector sleeve 14.

[0037] like Figures 1-5As shown, an expansion ring 41 is fitted at the bottom of the outer tube 4. The expansion ring 41 is used to lock and fix the bottom of the outer tube 4 to the outlet end of the lower valve body 2. The expansion ring 41 can firmly lock the bottom of the outer tube 4 to the outlet end of the lower valve body 2. A check valve 23 is provided inside the lower valve body 2. The check valve 23 is located on the plunger 22. The check valve 23 allows the liquid in the inlet valve chamber 21 to flow unidirectionally from the inlet end of the lower valve body 2 to the outlet end. The check valve 23 can prevent the water in the upper valve body 1 from flowing back into the lower valve body 2 through the flow passage 5. The inlet valve chamber 21 includes an inlet channel 211 and a flow passage 212. The inner diameter of the inlet channel 211 is smaller than the inner diameter of the flow passage 212. A sealing ring 221 is fixed on the outer wall of the bottom of the plunger 22. The plunger 22 is connected to the inlet valve 2 through the sealing ring 221. The channel 211 is sealed. When the plunger 22 drives the sealing ring 221 into the water inlet channel 211, the water inlet valve chamber 21 is in a blocked state. When the plunger 22 drives the sealing ring 221 into the water passage 212, there is a gap between the sealing ring 221 and the water passage 212, so that the water inlet valve chamber 21 is in a conductive state. The outer wall of the lower valve body 2 is provided with a first stop part 24. When the outer tube 4 is inserted into the water outlet end of the lower valve body 2, the bottom of the outer tube 4 is stopped and engaged with the first stop part 24. The side wall of the plunger 22 is provided with a second stop part 222. When the inner tube 3 is inserted into the top of the plunger 22, the bottom of the inner tube 3 is stopped and engaged with the second stop part 222. By using the stopping and positioning function of the first stop part 24 and the second stop part 222, the installation accuracy of the outer tube 4 and the inner tube 3 on the lower valve body 2 can be improved.

[0038] In other embodiments, such as Figure 6 As shown, four sliders 42 are symmetrically arranged on the inner wall of the outer tube 4. The center of the four sliders 42 forms a space for the inner tube 3 to be inserted and guided, and a gap for liquid flow is formed between adjacent sliders 42.

[0039] The basic working principle of this utility model is as follows: An inner pipe 3 and an outer pipe 4 are connected between the upper valve body 1 and the lower valve body 2. The inner pipe 3 and the outer pipe 4 are made of rigid plastic pipes, and the outer pipe 4 is coaxially sleeved outside the inner pipe 3, forming a flow channel 5 between the inner pipe 3 and the outer pipe 4. The bottom of the inner pipe 3 is inserted and fixed to the top of the plunger 22 in the lower valve body 2. The top of the inner pipe 3 is fixedly connected to the top of the valve stem 11 through a locking structure. The bottom of the connecting seat 13 of the upper valve body 1 has a plug-in sleeve 14. The top of the outer pipe 4 is sleeved outside the plug-in sleeve 14. The bottom of the outer pipe 4 is inserted and fitted to the water outlet end of the lower valve body 2. It also includes a locking sleeve 15, which includes an integrally formed annular pressing part 151 and annular locking part 152. When the operator needs to adjust the length of the pipe body of this utility model that extends into the ground, a cutting tool can be used. The bottoms of the inner tube 3 and outer tube 4, made of plastic, are cut to obtain inner tube 3 and outer tube 4 of predetermined length. Then, the top of the inner tube 3 is fixedly connected to the bottom of the valve stem 11 through a locking structure. After that, the outer tube 4 is sleeved on the outside of the inner tube 3, so that the top of the outer tube 4 is inserted and fixed to the plug-in sleeve 14 of the upper valve body 1. Then, the annular locking part 152 of the locking sleeve 15 is threaded into the relief groove of the connecting seat 13. By continuously tightening the annular locking part 152, the annular pressing part 151 locks and fixes the upper end of the outer tube 4 to the outside of the locking sleeve 15. Then, the inner tube 3 and the plunger 22 can be moved up and down synchronously by turning the valve stem 11 to realize the opening or closing of the water inlet valve chamber 21 and the flow passage 5. It has the effects of adjustable length of inner and outer tubes, convenient disassembly and assembly, and firm locking.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An antifreeze valve with arbitrarily adjustable length, comprising an upper valve body (1) and a lower valve body (2), wherein the lower valve body (2) has an inlet valve chamber (21), the upper valve body (1) has an outlet valve chamber (12), and the upper valve body (1) is threadedly connected to a valve stem (11), characterized in that: An inner tube (3) and an outer tube (4) are connected between the upper valve body (1) and the lower valve body (2). The inner tube (3) and the outer tube (4) are made of rigid plastic tubes. The outer tube (4) is coaxially sleeved outside the inner tube (3). A flow passage (5) is formed between the inner tube (3) and the outer tube (4). The water inlet valve chamber (21) is connected to the water outlet valve chamber (12) through the flow passage (5). A plunger (22) is slidably provided in the inlet valve chamber (21). The bottom of the inner tube (3) is inserted and fixed to the top of the plunger (22). The top of the inner tube (3) is fixedly connected to the top of the valve stem (11) by a locking structure. The upper valve body (1) includes a connecting seat (13). The connecting seat (13) has a plug-in cylinder (14) extending downward from the outer tube (4). The inner cavity of the plug-in cylinder (14) is connected to the outlet valve chamber (12). The bottom of the outer tube (4) is inserted and fitted to the outlet end of the lower valve body (2). The top of the outer tube (4) is sleeved on the plug-in cylinder. In addition to (14), it also includes a locking sleeve (15), which includes an integrally formed annular pressing part (151) and an annular locking part (152). The connecting seat (13) has an annular relief groove (131) corresponding to the annular locking part (152). The annular locking part (152) is threadedly connected to the inner wall of the annular relief groove (131). When the annular locking part (152) is threadedly connected to the connecting seat (13), the annular pressing part (151) locks and fixes the upper end of the outer tube (4) to the outside of the plug tube (14).

2. The freeze-proof valve of claim 1, wherein: The locking structure includes an internal threaded sleeve (111) with internal threads (1111), the internal threaded sleeve (111) is integrally disposed at the bottom of the valve stem (11), the outer wall of the upper end of the inner tube (3) is provided with external threads (31) corresponding to the internal threads (1111), and the inner tube (3) is threadedly connected to the internal threads (1111) of the internal threaded sleeve (111) through the external threads (31).

3. A freeze-proof valve with an adjustable length according to claim 2, characterized in that: The bottom of the valve stem (11) extends into the inner cavity of the internal threaded sleeve (111), and a damping sleeve (112) is fixedly sleeved on the outer wall of the bottom of the valve stem (11), and the inner wall of the inner tube (3) is in frictional engagement with the outer wall of the damping sleeve (112).

4. The freeze-proof valve of claim 2, wherein: The outer wall of the plug tube (14) is coated with an anti-slip coating (141).

5. The antifreeze valve with arbitrarily adjustable length according to claim 2, characterized in that: The outer wall of the annular pressing part (151) is provided with anti-slip ridges (1511), and the outer diameter of the annular locking part (152) is larger than the outer diameter of the annular pressing part (151).

6. The freeze-proof valve of claim 2, wherein: The inner diameter of the annular pressing part (151) gradually decreases from the side closer to the annular locking part (152) toward the side farther away from the annular locking part (152).

7. The antifreeze valve with arbitrarily adjustable length according to claim 1, characterized in that: An expansion ring (41) is fitted at the bottom of the outer tube (4), and the expansion ring (41) is used to lock and fix the bottom of the outer tube (4) to the water outlet end of the lower valve body (2).

8. The freeze-proof valve of claim 1 wherein: The lower valve body (2) is provided with a check valve (23), which is located on the plunger (22) and allows the liquid in the inlet valve chamber (21) to flow unidirectionally from the inlet end of the lower valve body (2) to the outlet end.

9. The antifreeze valve with arbitrarily adjustable length according to claim 1, characterized in that: The water inlet valve chamber (21) includes a water inlet channel (211) and a water passage (212). The inner diameter of the water inlet channel (211) is smaller than the inner diameter of the water passage (212). A sealing ring (221) is fixedly provided on the outer wall of the bottom of the plunger (22). The plunger (22) is sealed with the water inlet channel (211) through the sealing ring (221).

10. The antifreeze valve with arbitrarily adjustable length according to claim 1, characterized in that: The lower valve body (2) has a first stop (24) on its outer wall. When the outer tube (4) is inserted into the water outlet of the lower valve body (2), the bottom of the outer tube (4) is stopped and engaged with the first stop (24). The plunger (22) has a second stop (222) on its side wall. When the inner tube (3) is inserted into the top of the plunger (22), the bottom of the inner tube (3) is stopped and engaged with the second stop (222).

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