Recirculating valve with high response speed

Abstract

The utility model discloses a recirculation valve with high response speed, which relates to the technical field of valve equipment and is characterized by comprising a valve body, an inlet end, an outlet end and a circulation end are arranged on the valve body, a valve rod sliding from the inlet end to the outlet end is arranged in the valve body, and a first sealing part and a second sealing part are respectively arranged at two ends of the valve rod. The outlet end is provided with a supporting table corresponding to the first sealing part, the circulating end is provided with a positioning pipe corresponding to the second sealing part, and when the first sealing part is away from the supporting table, the second sealing part seals the positioning pipe. The first sealing part corresponding to the outlet end and the second sealing part corresponding to the circulating end are arranged at the two ends of the valve body respectively, so that when the first sealing part and the outlet end work correspondingly, the second sealing part can respond, the effect of quick response is achieved, and overload of the water pump is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of valve equipment, and more specifically, to a recirculation valve with fast response speed. Background Art

[0002] The water feed pump recirculation valve is a valve device used in the water supply system. The water feed pump adjusts and controls the flow rate. When the operating conditions of the water pump change rapidly, the recirculation valve may not be able to respond in time. The water will remain in the pump body for a long time and will be heated by the friction of the impeller, causing the water temperature to rise. When the water temperature rises to a certain level, it will vaporize and form cavitation, causing damage to the water feed pump.

[0003] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a recirculation valve with a fast response speed. By respectively arranging a first sealing part corresponding to the outlet end and a second sealing part corresponding to the circulation end at both ends of the valve body, when the first sealing part operates correspondingly with the outlet end, the second sealing part can react, thereby achieving a quick response effect and preventing the water pump from overloading.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a recirculation valve with fast response speed, including a valve body, the valve body is provided with an inlet end, an outlet end and a circulation end, the valve body is provided with a valve stem sliding from the inlet end to the outlet end, the two ends of the valve stem are respectively provided with a first sealing part and a second sealing part, the outlet end is provided with a support platform corresponding to the first sealing part, the circulation end is provided with a positioning tube corresponding to the second sealing part, when the first sealing part is away from the support platform, the second sealing part seals the positioning tube.

[0006] Preferably, the first sealing part is a sealing disk, a mounting sleeve is provided at the end of the sealing disk, a sliding push rod is provided in the mounting sleeve, an elastic member is provided in the mounting sleeve, the elastic member has elastic potential energy for pushing the push rod away from the first sealing part, and a cross bar corresponding to the push rod is provided in the valve body.

[0007] Preferably, a mounting hole corresponding to the valve stem is provided on the positioning tube, the second sealing portion is a stop rod, an inclined limiting surface is provided on the top end of the stop rod, and the limiting surface is arranged corresponding to the mounting hole.

[0008] Preferably, a sealing ring corresponding to the first sealing portion is provided on the support platform.

[0009] Preferably, a sealing ring that fits the valve stem is provided on the inner wall of the mounting hole.

[0010] The utility model has the following beneficial effects:

[0011] When the circulation valve is in operation, when the medium pressure in the valve body is greater than the pressure at the circulation end and the elastic member, the first sealing part squeezes the elastic member to open the outlet end, so that the limiting surface on the second sealing part slides in the mounting hole, so that the flux of the positioning tube gradually decreases until the limiting surface of the push rod is away from the mounting hole, so that the mounting hole is sealed under the action of the push rod and the valve stem and the sealing ring; when the medium pressure at the outlet end is greater than the medium pressure at the inlet end, the elastic member pushes the first sealing part close to the support platform, so that the limiting surface of the second sealing part is staggered with the mounting hole; when the medium pressure at the outlet end is too large, the first sealing part is close to the support platform under the action of the elastic member, and at the same time drives the second sealing part to open the mounting hole of the circulation end through the valve stem, so that the opening and closing of the circulation end of the valve body is synchronized with the opening and closing of the outlet end, thereby achieving the effect of preventing the water pump from overloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 This is a structural schematic diagram of the utility model when the valve body is in a hidden state;

[0015] Figure 4 It is an exploded view of the valve body of the utility model in a hidden state.

[0016] In the figure: 1. valve body; 2. inlet end; 3. outlet end; 4. circulation end; 5. valve stem; 6. first sealing part; 7. second sealing part; 8. support platform; 9. positioning tube; 10. sealing disk; 11. mounting sleeve; 12. push rod; 13. elastic part; 14. cross bar; 15. mounting hole; 16. gear lever; 17. limiting surface; 18. sealing ring; 19. sealing ring. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] A recirculation valve with a fast response, such as Figures 1 to 4As shown, it includes a valve body 1, which is provided with an inlet end 2, an outlet end 3 and a circulation end 4. A valve stem 5 sliding from the inlet end 2 to the outlet end 3 is provided in the valve body 1, and a first sealing part 6 and a second sealing part 7 are provided at both ends of the valve stem 5, respectively. The outlet end 3 is provided with a support platform 8 corresponding to the first sealing part 6, and the circulation end 4 is provided with a positioning tube 9 corresponding to the second sealing part 7. When the first sealing part 6 is away from the support platform 8, the second sealing part 7 seals the positioning tube 9.

[0019] In the above embodiment, the first sealing portion 6 and the second sealing portion 7 are fixedly arranged at both ends of the valve body 1, and the valve body 1 slides from the inlet end 2 to the outlet end 3, so that when the first sealing portion 6 is away from the support platform 8, the second sealing portion 7 seals the positioning tube 9. Similarly, when the first sealing portion 6 is in contact with the support platform 8, the second sealing portion 7 opens the positioning tube 9.

[0020] refer to Figure 2 and Figure 4 As shown: the first sealing part 6 is a sealing disk 10, a mounting sleeve 11 is provided at the end of the sealing disk 10, a sliding push rod 12 is provided in the mounting sleeve 11, an elastic member 13 is provided in the mounting sleeve 11, and the elastic member 13 has elastic potential energy for pushing the push rod 12 away from the first sealing part 6, a cross bar 14 corresponding to the push rod 12 is provided in the valve body 1, and a sealing ring 18 corresponding to the first sealing part 6 is provided on the support platform 8.

[0021] In the above embodiment, the sealing disk 10, under the action of the elastic member 13, makes the seal fit with the sealing ring 18 on the support platform 8, so that the sealing disk 10 and the support platform 8 seal the outlet end 3 of the valve body 1, so that when the valve body 1 is not in use, the inlet end 2 is sealed and the second sealing part 7 of the circulation end 4 is open.

[0022] refer to Figure 2 and Figure 3 As shown: the positioning tube 9 is provided with a mounting hole 15 corresponding to the valve stem 5, the second sealing portion 7 is a stop rod 16, the top of the stop rod 16 is provided with an inclined limiting surface 17, the limiting surface 17 is arranged corresponding to the mounting hole 15, and the inner wall of the mounting hole 15 is provided with a sealing ring 19 that fits the valve stem 5.

[0023] In the above embodiment, the positioning tube 9 corresponds to the valve stem 5 so that the mounting hole 15 on the positioning tube 9 corresponds to the shift rod 16, and the inclined limiting surface 17 gradually staggers with the mounting hole 15, so that the flux of the circulation valve is opened.

[0024] Working principle:

[0025] When the circulation valve is in operation, when the medium pressure in the valve body 1 is greater than the pressure of the circulation end 4 and the elastic member 13, the first sealing part 6 squeezes the elastic member 13 to open the outlet end 3, so that the limiting surface 17 on the second sealing part 7 slides in the mounting hole 15, so that the flux of the positioning tube 9 gradually decreases until the limiting surface 17 of the push rod 12 is away from the mounting hole 15, so that the mounting hole 15 is sealed under the action of the push rod 12, the valve stem 5 and the sealing ring 19, and when the medium pressure at the outlet end 3 is greater than the medium pressure at the inlet end 2, the elastic member 13 pushes the first sealing part 6 to approach the support platform 8, so that the limiting surface 17 of the second sealing part 7 is staggered with the mounting hole 15, so that when the medium pressure at the outlet end 3 is too large, the first sealing part 6 is moved close to the support platform 8 under the action of the elastic member 13, and at the same time, the second sealing part 7 is driven by the valve stem 5 to open the mounting hole 15 of the circulation end 4, so that the opening and closing of the circulation end 4 of the valve body 1 is synchronized with the opening and closing of the outlet end 3, thereby achieving the effect of preventing the water pump from overloading.

[0026] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A recirculation valve with a fast response speed, comprising a valve body (1), wherein the valve body (1) is provided with an inlet end (2), an outlet end (3) and a circulation end (4), characterized in that: The valve body (1) is provided with a valve stem (5) which slides from the inlet end (2) to the outlet end (3); the valve stem (5) is provided with a first sealing portion (6) and a second sealing portion (7) at both ends thereof; the outlet end (3) is provided with a support platform (8) corresponding to the first sealing portion (6); the circulation end (4) is provided with a positioning tube (9) corresponding to the second sealing portion (7); when the first sealing portion (6) is away from the support platform (8), the second sealing portion (7) seals the positioning tube (9).

2. The recirculation valve with fast response speed according to claim 1, characterized in that: The first sealing portion (6) is a sealing disk (10), an end of the sealing disk (10) is provided with a mounting sleeve (11), a sliding push rod (12) is provided in the mounting sleeve (11), an elastic member (13) is provided in the mounting sleeve (11), the elastic member (13) has elastic potential energy for pushing the push rod (12) away from the first sealing portion (6), and a cross rod (14) corresponding to the push rod (12) is provided in the valve body (1).

3. The recirculation valve with fast response speed according to claim 2, characterized in that: The positioning tube (9) is provided with a mounting hole (15) corresponding to the valve stem (5); the second sealing portion (7) is a stop rod (16); an inclined limiting surface (17) is provided at the top end of the stop rod (16); the limiting surface (17) is arranged corresponding to the mounting hole (15).

4. The recirculation valve with a fast response speed according to claim 3, characterized in that: A sealing ring (18) corresponding to the first sealing portion (6) is provided on the support platform (8).

5. The recirculation valve with fast response speed according to claim 4, characterized in that: The inner wall of the mounting hole (15) is provided with a sealing ring (19) which fits the valve stem (5).

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