Adjustable delay differential pressure controller

Abstract

The utility model discloses an adjustable time-delay differential pressure controller, comprising a bottom box and a box cover, the top end of the bottom box is provided with a high-voltage pressure-sensing element, the bottom end of the bottom box is provided with a low-voltage pressure-sensing element, the bottom box is internally provided with a wiring terminal, and side plates at two sides of the bottom box are provided with chutes. First sliding shafts and second sliding shafts are slidably installed in the two sliding grooves, the same time delay module is connected between the two first sliding shafts, the same time delay module is connected between the two second sliding shafts, and arc-shaped grooves are formed in side plates on the two sides of the bottom box. Through cooperation of the first inserting rod, the second inserting rod, the first conical plug, the second conical plug, the inserting hole, the spring and the wedge-shaped block, after the first conical plug enters the inserting hole, the wedge-shaped block is pushed to the two sides, so that the wedge-shaped block limits the first conical plug from being pulled out of the inserting hole, and then connection between the box cover and the bottom box is achieved; compared with existing screw screwing connection, operation is easy and convenient, and meanwhile the problem of screw slipping is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of time-delay differential pressure controllers, in particular to an adjustable time-delay differential pressure controller. Background Art

[0002] The delayed differential pressure controller is a safety switch for oil pressure protection, which can be used to protect refrigeration compressors from damage caused by low lubricating oil pressure. It is an automatic control and protection device, and its working principle is based on force balance, relying on springs, two relative bellows, and other mechanical parts combined with the operation controller to perform operation amplification on the mechanical signal and output it: to meet the output function requirements of the delayed differential pressure switch value and control the system oil pressure difference.

[0003] The existing delayed differential pressure controller usually connects the bottom box and the box cover by screwing. During internal maintenance, frequent screwing of the screws can easily cause thread slippage, resulting in the inability to connect the box cover and the bottom box. In addition, the internal space of the delayed differential pressure controller is small and it has many components, which makes the wiring between the wiring electronics and the delay module inconvenient. Therefore, an adjustable delayed differential pressure controller is needed to meet the needs. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustable time-delay differential pressure controller to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable time-delay differential pressure controller, comprising a bottom box and a box cover, a high-pressure pressure-sensitive original component is arranged on the top of the bottom box, a low-pressure pressure-sensitive original component is arranged on the bottom of the bottom box, a wiring terminal is arranged in the bottom box, a slide groove is arranged on both side plates of the bottom box, a first slide shaft and a second slide shaft are slidably installed in the two slide grooves, the same delay module is connected between the two first slide shafts and between the two second slide shafts, and an arc groove is arranged on the side plates of both sides of the bottom box One end of the arc groove is connected to one end of the slide groove, the second slide shaft and the arc groove are adapted to each other, a first plug rod is arranged on the side of the box cover close to the side plate of the bottom box, a second plug rod is arranged on the first plug rod, a first conical plug is arranged on the second plug rod, a second conical plug is slidably installed on the second plug rod, and the second conical plug is in the opposite direction of the first conical plug, a jack is opened on the side plate of the bottom box, a spring is arranged in the side wall of the jack, a wedge block is connected to the spring, and the wedge block is located between the first conical plug and the second conical plug.

[0006] Preferably, the length of the slide groove is greater than the radius length of the arc groove.

[0007] Preferably, a through hole is provided on the box cover, and the adjustment button of the delay module is located in the through hole.

[0008] Preferably, sponge pads are provided on both side panels of the bottom box, and the sponge pads are in contact with the inner wall of the box cover.

[0009] Preferably, the outer diameter of the first insertion rod is greater than the outer diameter of the second insertion rod.

[0010] Preferably, the inner diameter of the insertion hole is the same as the maximum outer diameters of the first tapered plug, the second tapered plug, and the outer diameter of the first insertion rod.

[0011] Preferably, a guide groove is provided on the side wall of the jack, a spring is connected to one end of the guide groove, and the wedge block is slidably fitted in the guide groove.

[0012] The beneficial effects of the utility model are:

[0013] In the utility model, the first plug rod, the second plug rod, the first conical plug, the second conical plug, the insertion hole, the spring and the wedge block cooperate so that after the first conical plug enters the insertion hole, the wedge block can be pushed to both sides, so that the wedge block restricts the first conical plug from being pulled out of the insertion hole, thereby realizing the connection between the box cover and the bottom box. Compared with the existing screw twist connection, the operation is simple and convenient, and the problem of screw slippage is avoided.

[0014] In the utility model, through the cooperation of the slide groove, the first slide shaft, the second slide shaft and the arc groove, when the second slide shaft is located at the connection part of the slide groove and the arc groove, the second slide shaft slides in the arc groove, so that the delay module can rotate upward with the first slide shaft as the rotation center, thereby exposing the wiring part on the delay module from the bottom box, facilitating wiring, and providing space for wiring of the wiring terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an adjustable time-delay differential pressure controller proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of an adjustable time-delay differential pressure controller proposed by the utility model;

[0017] Figure 3 It is a side cross-sectional structural schematic diagram of an adjustable time-delay differential pressure controller proposed by the utility model;

[0018] Figure 4 The utility model provides an adjustable time-delay differential pressure controller. Figure 3 The enlarged structural diagram at A in the middle;

[0019] Figure 5 This is a schematic diagram of the side cross-sectional structure of a slideway of an adjustable delayed differential pressure controller proposed by the utility model;

[0020] Figure 6 The utility model provides an adjustable time-delay differential pressure controller. Figure 5 Enlarged structural diagram at B in the middle.

[0021] In the figure: 1. bottom box; 2. box cover; 3. high-voltage pressure-sensitive element; 4. low-voltage pressure-sensitive element; 5. terminal block; 6. slide groove; 7. first slide shaft; 8. second slide shaft; 9. delay module; 10. arc groove; 11. first plug rod; 12. second plug rod; 13. first conical plug; 14. second conical plug; 15. jack; 16. spring; 17. wedge block; 18. through hole; 19. sponge pad; 20. guide groove. DETAILED DESCRIPTION

[0022] 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.

[0023] Reference Figure 1-6 , an adjustable time-delay differential pressure controller, comprising a bottom box 1 and a box cover 2, a high-pressure pressure-sensitive original 3 is arranged on the top of the bottom box 1, a low-pressure pressure-sensitive original 4 is arranged on the bottom of the bottom box 1, a wiring terminal 5 is arranged in the bottom box 1, a slide groove 6 is provided on both side plates of the bottom box 1, a first slide shaft 7 and a second slide shaft 8 are slidably installed in the two slide grooves 6, a same delay module 9 is connected between the two first slide shafts 7 and between the two second slide shafts 8, an arc groove 10 is provided on both side plates of the bottom box 1, one end of the arc groove 10 is connected to one end of the slide groove 6, and the second The sliding shaft 8 and the arc groove 10 are adapted to each other, and a first plug rod 11 is arranged in the side of the box cover 2 close to the side plate of the bottom box 1, and a second plug rod 12 is arranged on the first plug rod 11, and a first conical plug 13 is arranged on the second plug rod 12, and a second conical plug 14 is slidably installed on the second plug rod 12, and the second conical plug 14 is opposite to the first conical plug 13. A hole 15 is opened on the side plate of the bottom box 1, and a spring 16 is arranged in the side wall of the hole 15, and a wedge block 17 is connected to the spring 16, and the wedge block 17 is located between the first conical plug 13 and the second conical plug 14.

[0024] When the box cover 2 is connected to the bottom box 1, after the first conical plug 13 enters the insertion hole 15, the wedge block 17 is pushed to both sides, so that the first conical plug 13 moves from one end of the wedge block 17 to the other end. After the spring 16 pushes the wedge block 17 out, the wedge block 17 restricts the first conical plug 13 from being pulled out of the insertion hole 15, thereby realizing the connection between the box cover 2 and the bottom box 1. When the box cover 2 needs to be removed, the box cover 2 is pressed so that the first conical plug 13 penetrates into the insertion hole 15. 5, at this time, the second conical plug 14 contacts with the wedge block 17 and pushes the wedge block 17 to retract, so that the second conical plug 14 moves from one end of the wedge block 17 to the other end. After the spring 16 pushes the wedge block 17 to pop out, the second conical plug 14 can slide, so that the second conical plug 14 and the first conical plug 13 are combined, so that when the box cover 2 is taken out from the bottom box 1, the combined second conical plug 14 and the first conical plug 13 can be taken out from the insertion hole 15 together;

[0025] When wiring, the delay module 9 is rotated so that the second sliding shaft 8 slides in the arc groove 10, and the first sliding shaft 7 rotates in the sliding groove 6, so that the wiring part of the delay module 9 is exposed from the bottom box 1, thereby avoiding the problem of small internal space of the bottom box 1 and inconvenient wiring.

[0026] Specifically, in this embodiment, the length of the slide groove 6 is greater than the radius length of the arc groove 10. When the first slide shaft 7 and the second slide shaft 8 are both located in the slide groove 6, the stability of the delay module 9 can be guaranteed and the rotation of the delay module 9 can be prevented from being obstructed.

[0027] Specifically, in this embodiment, a through hole 18 is opened on the box cover 2, and the adjustment button of the delay module 9 is located in the through hole 18 to ensure the stability of the delay module 9 after the box cover 2 is installed.

[0028] Specifically, in the present embodiment, sponge pads 19 are provided on both side panels of the base box 1, and the sponge pads 19 are in contact with the inner wall of the box cover 2. The elasticity of the sponge pads 19 provides space for the pressing operation required when the box cover 2 is removed, and enables the box cover 2 to always drive the first conical plug 13 to move in the direction of separation of the jack 15 after installation, thereby improving the firmness of the box cover 2 after connection.

[0029] Specifically, in this embodiment, the outer diameter of the first plug rod 11 is greater than the outer diameter of the second plug rod 12, so that the first plug rod 11 can limit the movement of the second tapered plug 14, so that the second tapered plug 14 can push the wedge block 17 to contract.

[0030] Specifically, in this embodiment, the inner diameter of the insertion hole 15 is the same as the maximum outer diameters of the first tapered plug 13 and the second tapered plug 14 , and the outer diameter of the first insertion rod 11 , so as to prevent the box cover 2 from shaking after being connected to the bottom box 1 .

[0031] Specifically, in this embodiment, a guide groove 20 is opened on the side wall of the socket 15, the spring 16 is connected to one end of the guide groove 20, the wedge block 17 is slidably adapted in the guide groove 20, and the guide groove 20 provides a storage space and horizontal movement guide for the movement of the wedge block 17.

[0032] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An adjustable time-delay differential pressure controller, comprising a bottom box (1) and a box cover (2), characterized in that: A high-pressure pressure-sensitive element (3) is arranged on the top of the bottom box (1), a low-pressure pressure-sensitive element (4) is arranged on the bottom of the bottom box (1), a wiring terminal (5) is arranged inside the bottom box (1), sliding grooves (6) are provided on the side plates on both sides of the bottom box (1), a first sliding shaft (7) and a second sliding shaft (8) are slidably installed in the two sliding grooves (6), a same delay module (9) is connected between the two first sliding shafts (7) and between the two second sliding shafts (8), an arc groove (10) is provided on the side plates on both sides of the bottom box (1), one end of the arc groove (10) is communicated with one end of the sliding groove (6), the second sliding shaft (8) and the arc groove (10) are adapted to each other. The box cover (2) is provided with a first plug rod (11) on one side of the side plate of the bottom box (1), a second plug rod (12) is provided on the first plug rod (11), a first conical plug (13) is provided on the second plug rod (12), a second conical plug (14) is slidably mounted on the second plug rod (12), the second conical plug (14) is in the opposite direction to the first conical plug (13), a plug hole (15) is provided on the side plate of the bottom box (1), a spring (16) is provided in the side wall of the plug hole (15), a wedge block (17) is connected to the spring (16), and the wedge block (17) is located between the first conical plug (13) and the second conical plug (14).

2. The adjustable time-delay differential pressure controller according to claim 1, characterized in that: The length of the sliding groove (6) is greater than the radius length of the arc groove (10).

3. The adjustable time-delay differential pressure controller according to claim 1, characterized in that: The box cover (2) is provided with a through hole (18), and the adjustment button of the delay module (9) is located in the through hole (18).

4. The adjustable time-delay differential pressure controller according to claim 1, characterized in that: Sponge pads (19) are provided on both side panels of the bottom box (1), and the sponge pads (19) are in contact with the inner wall of the box cover (2).

5. The adjustable time-delay differential pressure controller according to claim 1, characterized in that: The outer diameter of the first insertion rod (11) is greater than the outer diameter of the second insertion rod (12).

6. The adjustable time-delay differential pressure controller according to claim 1, characterized in that: The inner diameter of the insertion hole (15) is the same as the maximum outer diameters of the first tapered plug (13), the second tapered plug (14), and the outer diameter of the first insertion rod (11).

7. The adjustable time-delay differential pressure controller according to claim 1, characterized in that: A guide groove (20) is provided on the side wall of the insertion hole (15), a spring (16) is connected to one end of the guide groove (20), and a wedge block (17) is slidably fitted in the guide groove (20).

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