Water spraying type single-screw high-pressure host one-way check valve

Abstract

The utility model relates to the technical field of one-way check valves, and discloses a one-way check valve of a water spraying type single-screw high-pressure main machine, which comprises a one-way valve body, a one-way valve seat and a liquid outlet pipe fixedly connected with the side of the one-way valve body. An upper notch is formed in the end, away from the one-way valve seat, of the one-way valve body. According to the one-way check valve of the water spraying type single-screw high-pressure main machine, the valve column and the sealing top block are connected through the inner fixing ring and the fastening bolt, rapid disassembly and replacement are facilitated, the maintenance cost is reduced, the diameter of the reset spring is larger than the outer diameter of the spring sleeve, and the inner diameter of the inner groove is larger than the diameter of the reset spring, so that the reset spring is centered, and the displacement possibility is reduced; the guide column is matched with the guide groove, so that the valve column does not deviate when ascending and descending, the sealing ejector block is prevented from being dislocated to affect sealing performance, the sealing ejector block is matched with the sealing ring installed in a semi-embedded mode to be matched with the one-way valve body, better sealing can be achieved, and cooling liquid backflow is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of one-way check valve technology, specifically a water-spray type single screw high-pressure main unit one-way check valve. Background Technology

[0002] The water-jet single-screw high-pressure compressor has a core structure consisting of a single-screw rotor, a star wheel, and a casing. The single-screw rotor meshes with the star wheel, compressing the gas within the screw slots. During operation, water-jet technology is used, where the coolant plays a crucial role in cooling, sealing, and lubrication within the compression chamber. This effectively reduces temperature, decreases energy consumption, and improves compression efficiency. Simultaneously, it significantly reduces component wear, ensures stable operation, and extends service life. When coolant enters the water-jet single-screw high-pressure compressor, a one-way check valve must be installed externally to prevent coolant backflow.

[0003] Most existing water-spraying single-screw high-pressure main unit check valves use an integrated valve core. After long-term use, the valve core needs to be replaced due to wear. The integrated valve core is expensive and cannot replace individual components, resulting in high maintenance costs. At the same time, existing check valves do not have a guide structure inside, which can easily lead to displacement of the sealing top block after long-term use, resulting in a weakening of the check valve's ability. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a water-spray type single-screw high-pressure main unit one-way check valve to solve the problems mentioned in the background.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a water-spraying single-screw high-pressure main unit one-way check valve, comprising a one-way valve body, a one-way valve seat, and an outlet pipe fixedly connected to the side of the one-way valve body. The one-way valve body has a lower notch at one end near the one-way valve seat and an upper notch at one end away from the one-way valve seat. A lower sealing ring and an upper sealing ring are respectively nested inside the lower notch and the upper notch. An inner sleeve is fixedly installed at the top of the one-way valve seat inside the one-way valve body. Diagonally distributed guide posts are fixedly installed inside the inner sleeve. An inner groove is formed at the top of the one-way valve seat inside the inner sleeve. A valve core assembly is provided inside the inner sleeve. A return spring is provided between the valve core assembly and the one-way valve seat.

[0008] The valve core assembly includes a valve stem, a detachably mounted sealing top block at the top of the valve stem, and an inner fixing ring located inside the valve stem. The lower part of the valve stem is located inside the inner sleeve. A fastening bolt is provided between the inner fixing ring, the valve stem, and the sealing top block. Both the valve stem and the sealing top block have threaded holes adapted to the fastening bolt. A spring sleeve is fixedly installed at the end of the inner fixing ring away from the sealing top block. A guide groove adapted to the guide post is provided at the end of the valve stem near the inner sleeve. An inner notch is provided at the sealing top block away from the valve stem. A sealing ring is semi-embedded inside the inner notch.

[0009] Preferably, the one-way valve body has an inlet at the top opening and the outlet pipe has an outlet at the end away from the one-way valve body, and the one-way valve body and the outlet pipe are interconnected.

[0010] Preferably, the valve core assembly is located between the one-way valve body and the one-way valve seat, the centerline of the valve core assembly and the centerline of the one-way valve seat are on the same vertical line, and the return spring is in contact with both the valve core assembly and the one-way valve seat.

[0011] With the above technical solution, coolant enters the interior of the one-way valve body through the inlet, the valve core assembly opens, and coolant flows out through the outlet pipe and outlet. Conversely, when the coolant inside the outlet pipe flows in the opposite direction, the valve core assembly closes to prevent the coolant inside the outlet pipe from flowing back.

[0012] Preferably, the outer diameter surface of the valve column is in contact with the inner diameter surface of the inner sleeve. The valve column, sealing top block, inner fixing ring, guide column and return spring are all made of stainless steel. There are four identical guide columns and guide grooves, and the four guide columns and guide grooves are distributed at a 90° angle around the center line of the inner sleeve.

[0013] Through the above technical solution, the design of the guide column and guide groove ensures that the valve column will not shift during the up and down movement, reducing the risk of valve column displacement leading to displacement of the sealing top block and thus reducing sealing performance.

[0014] Preferably, the fastening bolts pass through the inner fixing ring and the valve stem and extend into the interior of the sealing top block. Four identical fastening bolts are provided, and the four fastening bolts are distributed at a 90° angle around the center line of the inner fixing ring.

[0015] Through the above technical solution, the valve column, sealing top block and fastening bolt are designed so that the valve column and sealing top block can be fastened together by the inner fixing ring and fastening bolt, and the valve column and sealing top block can also be quickly disassembled.

[0016] Preferably, the diameter of the reset spring is larger than the outer diameter of the spring sleeve, and the inner diameter of the inner groove is larger than the diameter of the reset spring.

[0017] By employing the above technical solution, and through the design that the diameter of the reset spring is larger than the outer diameter of the spring sleeve, and the inner diameter of the inner groove is larger than the diameter of the reset spring, it is ensured that the reset spring is always located in the center position of the inner sleeve, reducing the possibility of displacement.

[0018] Preferably, the side of the sealing ring away from the sealing top block is in contact with the one-way valve body, and the contact portion between the one-way valve body and the sealing ring has an inner recess that fits the sealing ring.

[0019] The above technical solution, through the design of the sealing ring and the concave part, can better provide a seal between the sealing top block and the one-way valve body, and can effectively prevent coolant backflow.

[0020] Compared with the prior art, this utility model provides a water-spray type single screw high-pressure main unit one-way check valve, which has the following beneficial effects:

[0021] 1. The water-spraying single-screw high-pressure main unit one-way check valve has a valve core assembly including a valve column, a sealing top block, and an inner fixing ring. The valve column and the sealing top block are fastened together by the inner fixing ring and fastening bolts and can be quickly disassembled. When the valve column or the sealing top block is damaged, it can be replaced separately, reducing maintenance costs.

[0022] 2. This water-spraying single-screw high-pressure main unit's one-way check valve features a design where the return spring diameter is larger than the outer diameter of the spring sleeve, and the inner diameter of the inner groove is larger than the diameter of the return spring. This ensures that the return spring is always centered within the inner sleeve, reducing the possibility of displacement. The guide post and guide groove design prevents the valve post from shifting during vertical movement, reducing the risk of valve post misalignment leading to displacement of the sealing top block and reduced sealing performance. The sealing top block, coupled with a semi-embedded sealing ring that works in conjunction with the one-way valve body, achieves better sealing and effectively prevents coolant backflow. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the half-section structure of the present invention. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the half-section structure of the present invention. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the disassembled structure of the valve core assembly of this utility model;

[0027] Figure 5 This is a three-dimensional structural diagram of the valve core assembly of this utility model.

[0028] The components are: 1. Check valve body; 2. Check valve seat; 3. Discharge pipe; 4. Discharge port; 5. Inlet port; 6. Lower notch; 7. Lower sealing ring; 8. Upper notch; 9. Upper sealing ring; 10. Inner sleeve; 11. Guide post; 12. Valve core assembly; 1201. Valve post; 1202. Guide groove; 1203. Inner fixing ring; 1204. Spring sleeve; 1205. Fastening bolt; 1206. Sealing top block; 1207. Threaded hole; 1208. Inner notch; 1209. Sealing ring; 13. Return spring; 14. Inner groove; 15. Inner recess. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1:

[0031] like Figure 1-5 As shown, the present invention provides a water-spraying single-screw high-pressure main unit one-way check valve, including a one-way valve body 1, a one-way valve seat 2, and an outlet pipe 3 fixedly connected to the side of the one-way valve body 1. The one-way valve body 1 has a lower notch 6 at the end near the one-way valve seat 2 and an upper notch 8 at the end away from the one-way valve seat 2. The lower notch 6 and the upper notch 8 are respectively nested and installed with a lower sealing ring 7 and an upper sealing ring 9. The top of the one-way valve seat 2 is fixedly installed with an inner sleeve 10 inside the one-way valve body 1. The inner sleeve 10 is fixedly installed with diagonally distributed guide posts 11. The top of the one-way valve seat 2 is fixedly installed with an inner groove 14 inside the inner sleeve 10. A valve core assembly 12 is provided inside the inner sleeve 10. A return spring 13 is provided between the valve core assembly 12 and the one-way valve seat 2.

[0032] The valve core assembly 12 includes a valve stem 1201, a sealing top block 1206 detachably mounted at the top of the valve stem 1201, and an inner fixing ring 1203 located inside the valve stem 1201. The lower part of the valve stem 1201 is located inside the inner sleeve 10. A fastening bolt 1205 is provided between the inner fixing ring 1203, the valve stem 1201, and the sealing top block 1206. Threaded holes 1207 adapted to the fastening bolts 1205 are provided inside both the valve stem 1201 and the sealing top block 1206. A spring sleeve 1204 is fixedly installed at the end of the inner fixing ring 1203 away from the sealing top block 1206. A guide groove 1202 adapted to the guide post 11 is provided at the end of the valve stem 1201 near the inner sleeve 10. An inner notch 1208 is provided on the sealing top block 1206 away from the valve stem 1201. A sealing ring 1209 is semi-embedded inside the inner notch 1208.

[0033] Specifically, the one-way valve body 1 has an inlet 5 at the top opening and an outlet 4 at the end of the outlet pipe 3 away from the one-way valve body 1. The one-way valve body 1 and the outlet pipe 3 are interconnected.

[0034] Specifically, the valve core assembly 12 is located between the one-way valve body 1 and the one-way valve seat 2. The centerline of the valve core assembly 12 and the centerline of the one-way valve seat 2 are on the same vertical line. The return spring 13 is in contact with both the valve core assembly 12 and the one-way valve seat 2. The advantage is that when coolant enters the one-way valve body 1 through the inlet 5, the valve core assembly 12 opens, and the coolant flows out through the outlet pipe 3 and the outlet 4. Conversely, when the coolant inside the outlet pipe 3 flows in the opposite direction, the valve core assembly 12 closes, preventing the coolant inside the outlet pipe 3 from flowing back.

[0035] Example 2:

[0036] like Figure 2-5 As shown, this is an improvement on the previous embodiment.

[0037] Specifically, the outer diameter surface of the valve stem 1201 is in contact with the inner diameter surface of the inner sleeve 10. The valve stem 1201, sealing top block 1206, inner fixing ring 1203, guide post 11, and return spring 13 are all made of stainless steel. Four identical guide posts 11 and guide grooves 1202 are provided, and the four guide posts 11 and guide grooves 1202 are distributed at a 90° angle around the center line of the inner sleeve 10. The advantage is that, through the design of the guide posts 11 and guide grooves 1202, the valve stem 1201 will not shift during vertical movement, reducing the possibility of displacement of the sealing top block 1206 due to valve stem 1201 offset, thus reducing the likelihood of reduced sealing performance.

[0038] Specifically, the diameter of the return spring 13 is larger than the outer diameter of the spring sleeve 1204, and the inner diameter of the inner groove 14 is larger than the diameter of the return spring 13. The advantage is that by designing the return spring 13 to have a larger diameter than the outer diameter of the spring sleeve 1204 and the inner diameter of the inner groove 14 to have a larger diameter than the return spring 13, the return spring 13 is always located at the center of the inner sleeve 10, reducing the possibility of displacement.

[0039] Example 3:

[0040] like Figure 2-5 As shown, this is an improvement on the previous embodiment.

[0041] Specifically, the fastening bolts 1205 pass through the inner fixing ring 1203 and the valve stem 1201 and extend into the interior of the sealing top block 1206. Four identical fastening bolts 1205 are provided, distributed at a 90° angle around the center line of the inner fixing ring 1203. The advantage is that, through the design of the inner fixing ring 1203, valve stem 1201, sealing top block 1206, and fastening bolts 1205, the valve stem 1201 and sealing top block 1206 can be securely installed together via the inner fixing ring 1203 and fastening bolts 1205, while also allowing for quick disassembly between the valve stem 1201 and the sealing top block 1206.

[0042] Example 4:

[0043] like Figure 2-5 As shown, this is an improvement on the previous embodiment.

[0044] Specifically, the side of the sealing ring 1209 away from the sealing top block 1206 is in contact with the one-way valve body 1, and the contact portion between the one-way valve body 1 and the sealing ring 1209 has an inner recess 15 adapted to the sealing ring 1209. The advantage is that the design of the sealing ring 1209 and the inner recess 15 provides a better seal between the sealing top block 1206 and the one-way valve body 1, effectively preventing coolant backflow.

[0045] Working principle: During use, coolant enters the one-way valve body 1 through the inlet 5, opening the valve core assembly 12. Coolant flows out through the outlet pipe 3 and outlet 4. Conversely, when the coolant inside the outlet pipe 3 flows in the opposite direction, the valve core assembly 12 closes to prevent backflow of coolant inside the outlet pipe 3. During the opening and closing of the valve core assembly 12, the design of the guide post 11 and guide groove 1202 prevents the valve post 1201 from shifting during its up and down movement, reducing the risk of displacement of the sealing top block 1206 due to valve post 1201 offset, which could reduce sealing performance. The design of the return spring 13 having a diameter larger than the outer diameter of the spring sleeve 1204 and the inner diameter of the inner groove 14 being larger than the diameter of the return spring 13 ensures that the return spring 13 is always located in the center position of the inner sleeve 10, reducing displacement. In cases where maintenance of the check valve is required after prolonged use, the bolts at the bottom of the check valve seat 2 should be removed first. Then, the check valve seat 2 should be separated from the check valve body 1, and the valve core assembly 12 should be removed from the inside of the check valve body 1. Through the design of the inner fixing ring 1203, valve column 1201, sealing top block 1206, and fastening bolt 1205, the valve column 1201 and the sealing top block 1206 can be securely installed through the inner fixing ring 1203 and the fastening bolt 1205. At the same time, the valve column 1201 and the sealing top block 1206 can also be quickly disassembled, which is convenient for users to maintain. When the valve column 1201 or the sealing top block 1206 is damaged, the valve column 1201 or the sealing top block 1206 can be replaced separately without replacing the entire valve core, thus reducing maintenance costs.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-jet single-screw high-pressure main engine non-return valve, comprising a non-return valve body (1), a non-return valve seat (2) and a liquid outlet pipe (3) fixedly connected to the side of the non-return valve body (1), characterized in that: The one-way valve body (1) has a lower notch (6) at one end near the one-way valve seat (2), and an upper notch (8) at one end away from the one-way valve seat (2). The lower notch (6) and the upper notch (8) are respectively nested inside the lower notch (6) and the upper notch (8). The top of the one-way valve seat (2) is fixedly installed inside the one-way valve body (1) with an inner sleeve (10). The inner sleeve (10) is fixedly installed inside the inner sleeve (10) with diagonally distributed guide posts (11). The top of the one-way valve seat (2) is located inside the inner sleeve (10) with an inner groove (14). The inner sleeve (10) is provided with a valve core assembly (12). A return spring (13) is provided between the valve core assembly (12) and the one-way valve seat (2). The valve core assembly (12) includes a valve stem (1201), a sealing top block (1206) detachably mounted on the top of the valve stem (1201), and an inner fixing ring (1203) located inside the valve stem (1201). The lower part of the valve stem (1201) is located inside the inner sleeve (10). A fastening bolt (1205) is provided between the inner fixing ring (1203) and the valve stem (1201) and the sealing top block (1206). The interiors of the valve stem (1201) and the sealing top block (1206) are both open. The device has a threaded hole (1207) adapted to the fastening bolt (1205). A spring sleeve (1204) is fixedly installed at the end of the inner fixing ring (1203) away from the sealing top block (1206). A guide groove (1202) adapted to the guide post (11) is opened at the end of the valve column (1201) near the inner sleeve (10). An inner notch (1208) is opened at the sealing top block (1206) away from the valve column (1201). A sealing ring (1209) is semi-embedded inside the inner notch (1208).

2. A water-lubricated single-screw high-pressure main engine non-return valve according to claim 1, characterized in that: The one-way valve body (1) has an inlet (5) at the top opening, and the outlet pipe (3) has an outlet (4) at the end away from the one-way valve body (1). The one-way valve body (1) and the outlet pipe (3) are interconnected.

3. A water-lubricated single-screw high-pressure main engine non-return valve according to claim 1, characterized in that: The valve core assembly (12) is located between the one-way valve body (1) and the one-way valve seat (2). The center line of the valve core assembly (12) and the center line of the one-way valve seat (2) are on the same vertical line. The return spring (13) is in contact with both the valve core assembly (12) and the one-way valve seat (2).

4. A water-lubricated single-screw high-pressure main engine non-return valve according to claim 1, characterized in that: The outer diameter surface of the valve stem (1201) is in contact with the inner diameter surface of the inner sleeve (10). The valve stem (1201), sealing top block (1206), inner fixing ring (1203), guide post (11) and return spring (13) are all made of stainless steel. There are four identical guide posts (11) and guide grooves (1202). The four guide posts (11) and guide grooves (1202) are distributed at a 90° angle around the center line of the inner sleeve (10).

5. A water-lubricated single-screw high-pressure main engine non-return valve according to claim 1, characterized in that: The fastening bolt (1205) passes through the inner fixing ring (1203) and the valve column (1201) and extends into the interior of the sealing top block (1206). There are four identical fastening bolts (1205), which are distributed at a 90° angle around the center line of the inner fixing ring (1203).

6. A water-lubricated single-screw high-pressure main engine non-return valve according to claim 1, characterized in that: The diameter of the return spring (13) is greater than the outer diameter of the spring sleeve (1204), and the inner diameter of the inner groove (14) is greater than the diameter of the return spring (13).

7. A water-lubricated single-screw high-pressure main engine non-return valve according to claim 1, characterized in that: The side of the sealing ring (1209) away from the sealing top block (1206) is in contact with the one-way valve body (1), and the contact part between the one-way valve body (1) and the sealing ring (1209) is provided with an inner recess (15) adapted to the sealing ring (1209).

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