RU2133911C1 - Condensate drain - Google Patents

Abstract

FIELD: equipment for automatic discharge of condensate from units and pipelines working under excessive pressure conditions. SUBSTANCE: condensate drain has casing with inlet and outlet branch pipes, float positioned within casing and provided with rod and locking member adjoining to seat having conical tangential surface. Seat is mounted in bottom adjoining to drain channel. Portion of casing adjoining to bottom is made in the form of truncated cone to define together with conical surface of seat a single cone. Locking member seat has at least one slot extending along generatrix on conical surface. Drain channel has auxiliary conical bore to which auxiliary spring-loaded ball back valve adjoins. Ball back valve has spring compression force adjusting device. Condensate drain of such construction may be used in systems where water vapor is used as heating heat-carrier. EFFECT: increased efficiency and enhanced reliability in operation. 1 dwg

Description

 The invention relates to devices for the automatic removal of condensate from apparatuses and pipelines operating under overpressure conditions, where a water ball is used as a heating coolant.

 A known steam trap containing a housing with an outlet pipe and a float placed on it on a guide, an exhaust valve box installed on the lower end of the housing, divided by an elastic plate into two chambers, communicating with the housing cavity through channels [1].

 The disadvantages of such a steam trap are the complexity and low reliability of operation under high overpressure conditions, which leads to steam losses during condensate discharge.

 The closest in technical essence and the achieved effect to the invention is a steam trap containing a body with a bottom and inlet and outlet with a valve nozzles located in the body of the float with a rod equipped with a locking body adjacent to the drain channel, equipped with a diaphragm located in the case above the bottom, on the latter has a valve seat, conical tapering in the direction of the diaphragm by a partition adjacent to the seat, coaxial to the stem and attached to the seat by a tube and an additional seat the main body of the float rod installed in the bottom, while the drain channel is made in the bottom and communicated with the outlet pipe [2].

 The disadvantage of such a steam trap is the lack of reliability due to the presence of a diaphragm shut-off element in the assembly. The known device has a relatively complex design. In addition, the known device is not protected from the return flow of condensate during shutdown of the heat-using apparatus.

 The present invention solves the problem of simplifying the design and increasing reliability and efficiency.

 To achieve this technical result, in a steam trap containing a body with inlet and outlet nozzles with a valve, a float located in the body with a rod and a locking element adjacent to the seat with a tapered contact surface installed in the bottom mating with the drain channel, a part of the body adjacent to the bottom, made in the form of a truncated cone and forms a single cone with the conical surface of the saddle, the locking body saddle has one or more grooves along the generatrix on the conical surface, the drain channel flax with an additional conical bore, to the surface of which adjoins an additionally installed spring-loaded ball check valve, equipped with a device for regulating the compression force of the spring.

 A comparative analysis of the proposed technical solution with the prototype shows that the claimed device has the following distinctive features: the presence of grooves on the conical surface of the saddle to equalize the pressure in the body of the steam trap and behind the ball drain valve, as well as the presence of a spring-loaded check valve equipped with a device for regulating the compression force of the spring.

 In FIG. 1 shows a General view of the proposed steam trap. In FIG. 2 shows a section of the taper surface of the saddle.

 The steam trap contains a housing 1 with a cover 2, with inlet and outlet pipes 3 and 12, respectively. In the cavity of the housing 1 there is a float 4 with a rod 5, equipped with a locking member 13 adjacent to the saddle 6 of the locking member having grooves 16 (Fig. 2). The bottom (cup) 10 with the outlet pipe 12 presses the saddle 6 against the housing 1 by means of a nut 8. In the bottom (cup) 10 there is a check valve 7 pressed against the bottom of the saddle 6 by the spring 9, as well as an adjustment rod 11, which allows changing the compression ratio of the spring nine.

 The steam trap operates as follows. In the absence of condensate, the float 4 is in the lower position, the locking element 13 is in contact with the seat 6 and closes the drain channel 15. Due to the grooves 16 in the seat 6, the pressure in the cavity of the housing 1 and between the valves 13 and 7 in the cavity 15 are equal. The check valve 7 is in the closed position - is pressed by the spring 9 to the seat 6.

 At the time of start-up of the heat-using apparatus, condensate enters the housing 1 of the condensate drain. Upon reaching a certain level in the housing 1, the float 4 pops up and pulls the stem 5 of the locking member 13, opens the drain channel in the seat 6. The spring 9 of the check valve 7, designed for a pressure lower than the pressure in the housing of the heat-using apparatus, and therefore the condensate drain housing 1, is compressed and the check valve 7 opens, condensate through the outlet pipe 12 is discharged into the condensate line. When the level in the housing 1 decreases, the float 4 lowers and closes the drain hole of the seat 6, the check valve 7 closes at the same time and prevents condensate from flowing back into the housing of the heat-using apparatus.

 Providing grooves to the saddle on the conical part improves the efficiency of the steam trap by facilitating the discharge of a direct condensate stream, and the presence of a non-return valve in the steam trap improves its reliability by providing a lock when a condensate backflow occurs and eliminates the diaphragm and elements associated with it.

 List of sources of information.

 1. Yakadin A.I. The condensate economy of industrial enterprises - M .: Energy, 1973. - 232.

 2. A. S. 1078187 USSR, MKI F 16 T 1/14 Steam trap / A.P. Danilin, I. A. Kozlova (USSR). - / 3571529 / 29-06; Declared 04/01/83; Publ. 03/07/84 // Discoveries. Inventions - 1984. - N9 - p. 118.

Claims (1)

 A steam trap containing a body with inlet and outlet nozzles with a valve, a float in the body with a rod and a locking element adjacent to the seat with a tapered contact surface mating with the drain channel, characterized in that the part of the body adjacent to the bottom is made in the form of a truncated cone and forms a single cone with the conical surface of the saddle, the seat of the locking member has one or more grooves along the generatrix on the conical surface, the drain channel is made with an additional conical bore, to turn NOSTA which additionally mounted adjacent a spring loaded ball check valve is provided with a device for adjusting the spring force.

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