Gate valve without valve cover
By designing a valve-free gate valve, the combined structure of bracket, perforation and sealing filler is used to solve the problem of leakage outside the traditional gate valve, achieving high sealing and safety, and avoiding production interruptions.
Patent Information
- Application Number
- CN202421397317.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In the case of long-term use or temperature difference changes, the seal between the valve cover and the valve body fails, resulting in external leakage, posing safety hazards and affecting production.
A valve coverless gate valve is designed. By setting a bracket and perforation on the valve body, the valve stem passes through the perforation and is filled with sealing filler, which realizes the removable connection between the valve plate and the valve stem, eliminating the gap between the valve cover and the valve body. The sealing and welding process and locking ring structure enhance the sealing performance.
It effectively eliminates the hidden dangers of external leakage between the valve cover and the valve body, avoids safety hazards and problems of shutdown, replacement or maintenance of process systems, improves sealing strength and connection strength, and meets the needs of high sealing.
Smart Images
Figure CN222479502U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gate valves, in particular to a bonnetless gate valve. Background Art
[0002] A gate valve refers to a valve that opens and closes by moving the opening and closing member (valve plate) in the direction perpendicular to the medium flow direction (channel axis). A traditional gate valve is mainly composed of a valve body, a valve cover, a bracket, a valve plate and a valve stem structure. The valve body and the valve cover are connected by bolts and sealing gaskets. When the gate valve is used for a long time or in an operating environment with temperature differences, the bolts will elongate, causing failure of the seal between the valve body and the valve cover, resulting in external leakage, posing a safety hazard and even causing the process system to shut down to replace or repair the valve, thereby affecting production. Utility Model Content
[0003] In view of the shortcomings of the prior art, the utility model provides a bonnetless gate valve to solve the problem of external leakage between the bonnet and the valve body of the conventional gate valve in the prior art.
[0004] To achieve the above-mentioned purpose, the utility model provides a bonnetless gate valve, including a valve body, a bracket, a valve plate and a valve stem, the bracket is arranged on the valve body and the bracket and the valve body are coaxially provided with a through hole for the valve stem to pass through, the front end of the valve body is provided with a liquid outlet, the rear end of the valve body is provided with a mounting hole, the mounting hole is connected to a side sealing seat, the side sealing seat is provided with a liquid inlet, the liquid outlet and the liquid inlet are coaxially aligned and the liquid outlet and the liquid inlet are combined to form a flow channel, the through hole is connected to the flow channel and a sealing filler is filled between the through hole and the valve stem, and the valve plate is detachably connected to the end of the valve stem.
[0005] The advantages of adopting the above technical scheme are as follows: when it is necessary to process the inside of the valve body, it can be processed directly through the mounting hole. After the processing of the inside of the valve body is completed, the valve plate can be placed into the inside of the valve body through the mounting hole and connected and assembled with the valve stem that penetrates into the inside of the valve body. The side sealing seat is installed into the mounting hole and connected with the valve body. At this time, the liquid inlet and liquid outlet on the mounting hole are coaxially aligned and combined to form a flow channel. When the valve stem moves and drives the valve plate to move synchronously, the flow channel is cut off or unblocked, thereby realizing the function of the gate valve. There is no valve cover design in this technology. Compared with the traditional gate valve in which the valve cover and the valve body are connected separately The connection technology eliminates the possibility of a joint between the valve cover and the valve body, thereby eliminating the hidden danger of external leakage, avoiding the safety hazard of the gate valve, and thus avoiding the problem of shutting down the process system to replace or repair the valve due to the external leakage of the gate valve; the bracket in the above technology can be directly installed on the valve body, that is, the bracket is directly connected to the valve body, the valve stem is inserted into the flow channel through the perforation, the operator puts the valve plate into the flow channel through the installation hole and detachably connects it to the end of the valve stem. The connection method can be a snap-on connection or a threaded connection, that is, the valve stem is matched with the perforation, and the valve stem is sealed by the sealing packing. The setting of the above technology and the setting of the sealing packing can eliminate the hidden danger of external leakage at the perforation; the bracket in the above technology is a prior art, which is used to cooperate with the handwheel part of the valve stem to realize the function of torque transmission. It is a prior art, so its connection method and specific structure will not be described in detail.
[0006] The utility model is further provided that: the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole are connected and arranged by a sealing welding process.
[0007] The benefit of adopting the above technical solution is that when installing the side sealing seat, the outer peripheral wall of the side sealing seat can be connected to the inner peripheral wall of the mounting hole through a sealing welding process, thereby improving the connection strength and sealing between the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole, eliminating the possibility of a seam between the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole, and avoiding leakage problems and safety hazards.
[0008] The utility model is further provided with: a locking ring is arranged in the mounting hole, the outer peripheral wall of the locking ring is threadedly connected to the inner peripheral wall of the mounting hole, the inner side wall of the locking ring is butted and matched with the outer side wall of the side sealing seat, the locking ring is provided with a through hole coaxially connected to the liquid inlet hole, the diameter of the through hole is set to be consistent with the diameter of the liquid inlet hole, a sealing groove is annularly provided on the outer peripheral wall of the side sealing seat, the sealing groove is connected to the outer side wall of the side sealing seat, a matching sealing ring and a sealing reinforcement ring are arranged in the sealing groove, the inner side wall of the sealing reinforcement ring is butted and matched with the outer side wall of the matching sealing ring, and the outer side wall of the sealing reinforcement ring is butted and matched with the inner side wall of the locking ring.
[0009] The above technical solution is beneficial in that: when installing the side sealing seat, first place the side sealing seat into the mounting hole, then install the matching sealing ring into the sealing groove, and then adjust the position of the side sealing seat, and then screw in the locking ring. The outer peripheral wall of the locking ring is threadedly connected with the inner peripheral wall of the mounting hole. When the locking ring is screwed in, the inner side wall of the locking ring gradually abuts and fits with the outer side wall of the sealing reinforcement ring and squeezes the sealing reinforcement ring, so that the sealing reinforcement ring squeezes the matching sealing ring, and the sealing reinforcement ring is squeezed by the locking ring and compresses the space of the matching sealing ring, thereby playing the role of sealing the sealing groove with the matching sealing ring. When the locking ring is completely screwed into the mounting hole, the inner side wall of the locking ring abuts and fits with the outer side wall of the side sealing seat, and the inner side wall of the side sealing seat cooperates with the valve plate. At this time, the side sealing seat is in The liquid hole and the liquid outlet hole are coaxially aligned and combined to form a flow channel, thereby completing the installation and fixation of the side sealing seat and the assembly of the valve body; in the above-mentioned technology, a locking ring is set to squeeze the sealing reinforcement ring and apply force to the sealing reinforcement ring, thereby compressing the sealing ring space, thereby improving the sealing strength between the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole, and improving the sealing strength between the side sealing seat and the mounting hole by matching the sealing ring and the sealing reinforcement ring with the locking ring, eliminating the possibility of a joint between the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole, avoiding leakage problems and safety hazards, and at the same time, the detachable connection of the locking ring facilitates the subsequent disassembly, replacement and maintenance of the valve body, flow channel or side sealing seat.
[0010] The utility model is further provided with: a bushing and a gland are sleeved on the valve stem, the bushing and the gland are coaxially arranged and the sealing filler is located between the bushing and the gland, the outer peripheral wall of the bushing is abutted and matched with the inner peripheral wall of the perforation, and the outer peripheral wall of the gland is threadedly connected with the inner peripheral wall of the perforation.
[0011] The benefits of adopting the above technical solution are: the operator screws in the gland so that the bottom of the gland abuts against the end of the sealing packing and as the gland continues to be screwed in, the gland squeezes the sealing packing, compressing the sealing packing space so that the sealing packing plays a sealing role in the perforation, thereby improving the sealing strength between the perforation and the valve stem and avoiding liquid overflow.
[0012] The utility model is further provided with: a pressure ring is arranged between the pressure cover and the sealing filler, the top surface of the pressure ring is arranged in abutment with the bottom surface of the pressure cover, and the bottom surface of the pressure ring is arranged in abutment with the top surface of the sealing filler.
[0013] The benefit of adopting the above technical solution is that when the gland is screwed in and pressed down, the gland ring is first squeezed so that the gland ring is pressed down and squeezes the sealing filler, thereby achieving sealing between the through hole and the valve stem, thereby improving the sealing strength.
[0014] The utility model is further provided with: a plurality of mounting bolts are detachably connected between the bracket and the valve body.
[0015] The advantages of adopting the above technical solution are that: in the above technology, a plurality of mounting bolts are connected between the bracket and the valve body, which facilitates disassembly and assembly while improving the connection strength between the bracket and the valve body. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a cross-sectional view of the first embodiment of the utility model;
[0017] Figure 2 It is a cross-sectional view of the second embodiment of the utility model. DETAILED DESCRIPTION
[0018] Specific implementation method one: The utility model provides a bonnetless gate valve, including a valve body 1, a bracket 4, a valve plate 21 and a valve stem 2, the bracket 4 is arranged on the valve body 1 and the bracket 4 and the valve body 1 are coaxially provided with a through hole 14 for the valve stem 2 to pass through, the front end of the valve body 1 is provided with a liquid outlet 11, the rear end of the valve body 1 is provided with a mounting hole 12, the mounting hole 12 is connected to a side sealing seat 3, the side sealing seat 3 is provided with a liquid inlet 31, the liquid outlet 11 is coaxially aligned with the liquid inlet 31 and the liquid outlet 11 and the liquid inlet 31 are combined to form a flow channel 32, the through hole 14 is connected to the flow channel 32 and a sealing filler 15 is filled between the through hole 14 and the valve stem 2, and the valve plate 21 and the end of the valve stem 2 are detachable The side sealing seat 3 is connected and arranged by the outer peripheral wall of the side sealing seat 3 and the inner peripheral wall of the mounting hole 12 through the sealing welding process. The valve stem 2 is sleeved with a bushing 42 and a pressure cover 43. The bushing 42 and the pressure cover 43 are coaxially arranged and the sealing packing 15 is located between the bushing 42 and the pressure cover 43. The outer peripheral wall of the bushing 42 is abutted and matched with the inner peripheral wall of the through hole 14. The outer peripheral wall of the pressure cover 43 is threadedly connected with the inner peripheral wall of the through hole 14. A pressure ring 44 is arranged between the pressure cover 43 and the sealing packing 15. The top surface of the pressure ring 44 is abutted and matched with the bottom surface of the pressure cover 43. The bottom surface of the pressure ring 44 is abutted and matched with the top surface of the sealing packing 15. A plurality of mounting bolts 45 are detachably connected between the bracket 4 and the valve body 1.
[0019] The first embodiment mentioned above is adopted to connect the outer peripheral wall of the side sealing seat with the inner peripheral wall of the mounting hole through a sealing welding process, so as to improve the connection strength and sealing between the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole, eliminate the possibility of a seam between the outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole, avoid leakage problems and safety hazards, and thus meet occasions with high sealing requirements.
[0020] Specific embodiment 2: The utility model provides a bonnetless gate valve, including a valve body 1, a bracket 4, a valve plate 21 and a valve stem 2, wherein the bracket 4 is arranged on the valve body 1 and the bracket 4 and the valve body 1 are coaxially provided with a through hole 14 for the valve stem 2 to pass through, the front end of the valve body 1 is provided with a liquid outlet 11, the rear end of the valve body 1 is provided with a mounting hole 12, the mounting hole 12 is connected to a side sealing seat 3, the side sealing seat 3 is provided with a liquid inlet 31, the liquid outlet 11 is coaxially aligned with the liquid inlet 31 and the liquid outlet 11 is provided with a liquid inlet 31. 1 is combined with the liquid inlet hole 31 to form a flow channel 32, the through hole 14 is connected to the flow channel 32, and a sealing filler 15 is filled between the through hole 14 and the valve stem 2, the valve plate 21 is detachably connected to the end of the valve stem 2, a locking ring 5 is arranged in the mounting hole 12, the outer peripheral wall of the locking ring 5 is threadedly connected to the inner peripheral wall of the mounting hole 12, the inner side wall of the locking ring 5 is abutted and matched with the outer side wall of the side sealing seat, the locking ring 5 is provided with a through hole 51 coaxially connected to the liquid inlet hole 31, and the diameter of the through hole 51 is the same as that of the side sealing seat. The diameter of the liquid inlet hole 31 is set uniformly, and a sealing groove 33 is circumferentially opened on the outer peripheral wall of the side sealing seat 3. The sealing groove 33 is connected to the outer side wall of the side sealing seat 3. A matching sealing ring 34 and a sealing reinforcement ring 35 are arranged in the sealing groove 33. The inner side wall of the sealing reinforcement ring 35 is abutted and matched with the outer side wall of the matching sealing ring 34, and the outer side wall of the sealing reinforcement ring 35 is abutted and matched with the inner side wall of the lock ring 5. The valve stem 2 is sleeved with a bushing 42 and a pressure cover 43. The bushing 42 and the pressure cover 43 The sealing packing 15 is coaxially arranged between the bushing 42 and the pressure cover 43, the outer peripheral wall of the bushing 42 is abutted and matched with the inner peripheral wall of the through hole 14, the outer peripheral wall of the pressure cover 43 is threadedly connected with the inner peripheral wall of the through hole 14, a pressure ring 44 is arranged between the pressure cover 43 and the sealing packing 15, the top surface of the pressure ring 44 is abutted and matched with the bottom surface of the pressure cover 43, the bottom surface of the pressure ring 44 is abutted and matched with the top surface of the sealing packing 15, and a plurality of mounting bolts 45 are detachably connected between the bracket 4 and the valve body 1.
[0021] The second embodiment described above is adopted to realize the detachable connection of the side sealing seat through the locking ring, so as to facilitate the subsequent maintenance of the valve body flow channel or replacement of the valve plate. The cooperation of the sealing ring, the sealing reinforcement ring and the locking ring in the above technology eliminates the possibility of a joint between the outer wall of the side sealing seat and the inner wall of the mounting hole, thereby avoiding leakage problems and safety hazards.
[0022] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.
Claims
1. A bonnetless gate valve, comprising a valve body, a bracket, a valve plate and a valve stem, characterized in that: The bracket is arranged on the valve body, and the bracket and the valve body are coaxially provided with a through hole for the valve stem to pass through, the front end of the valve body is provided with a liquid outlet, the rear end of the valve body is provided with a mounting hole, the mounting hole is connected to a side sealing seat, the side sealing seat is provided with a liquid inlet, the liquid outlet and the liquid inlet are coaxially aligned and the liquid outlet and the liquid inlet are combined to form a flow channel, the through hole is connected to the flow channel and a sealing filler is filled between the through hole and the valve stem, and the valve plate is detachably connected to the end of the valve stem.
2. A bonnetless gate valve according to claim 1, characterized in that: The outer peripheral wall of the side sealing seat and the inner peripheral wall of the mounting hole are connected and arranged through a sealing welding process.
3. The bonnetless gate valve according to claim 1, characterized in that: A locking ring is arranged in the mounting hole, the outer peripheral wall of the locking ring is threadedly connected to the inner peripheral wall of the mounting hole, the inner side wall of the locking ring is butted and matched with the outer side wall of the side sealing seat, the locking ring is provided with a through hole coaxially connected to the liquid inlet hole, the diameter of the through hole is set to be consistent with the diameter of the liquid inlet hole, a sealing groove is circumferentially arranged on the outer peripheral wall of the side sealing seat, the sealing groove is connected to the outer side wall of the side sealing seat, a matching sealing ring and a sealing reinforcement ring are arranged in the sealing groove, the inner side wall of the sealing reinforcement ring is butted and matched with the outer side wall of the matching sealing ring, and the outer side wall of the sealing reinforcement ring is butted and matched with the inner side wall of the locking ring.
4. The bonnetless gate valve according to claim 1, characterized in that: The valve stem is sleeved with a bushing and a gland, the bushing and the gland are coaxially arranged with a sealing filler located between the bushing and the gland, the outer peripheral wall of the bushing is abutted against the inner peripheral wall of the perforation, and the outer peripheral wall of the gland is threadedly connected with the inner peripheral wall of the perforation.
5. The bonnetless gate valve according to claim 4, characterized in that: A pressure ring is arranged between the pressure cover and the sealing filler, the top surface of the pressure ring is arranged in abutment with the bottom surface of the pressure cover, and the bottom surface of the pressure ring is arranged in abutment with the top surface of the sealing filler.
6. The bonnetless gate valve according to claim 1, characterized in that: A plurality of mounting bolts are detachably connected between the bracket and the valve body.